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Plural converters

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307 - Electrical transmission or interconnection systems

307043000 - PLURAL SUPPLY CIRCUITS OR SOURCES

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DocumentTitleDate
20110175454Dual-Loop Dynamic Fast-Tracking MPPT Control Method, Device, and System - A converter unit to improve the response dynamics and overall recovered power in a photovoltaic array configuration. Each photovoltaic panel in the photovoltaic array may be coupled to a respective converter unit, which may include a controller to sense an output voltage and output current produced by the solar panel, and control operation of a power converter to output modified voltage and current corresponding to the solar panel onto a bus coupling the converter units. The controller may operate as an analog or (digital) firmware control system to regulate the input voltage of each power converter unit under indirect guidance of a Maximum Power Point Tracking (MPPT) controller to optimize and regulate the resultant power, and achieve very fast dynamic response to environmental transients. Input voltage and output voltage management may be achieved by way of a fast inner control loop and a corresponding MPPT control system configured as an outer guidance loop providing a reference signal to the inner control loop.07-21-2011
20130026843System and Method for Local String Management Unit - Apparatuses and methods include a solar array having one or more strings of series-connected local management units (LMUs). Each LMU is parallel-connected to one of a plurality of solar modules. The strings are connected in parallel via a parallel bus. Local string management units (LSMUs) can increase or decrease an output voltage of the solar array by upconverting or downconverting string output voltages from each string. LSMUs can also operate in a bypass mode to increase overall power output.01-31-2013
20130026844PHOTOVOLTAIC GENERATION SYSTEM, POWER CONVERSION DEVICE, AND COLLECTOR BOX - A photovoltaic generation system includes: a solar cell array that includes a plurality of solar cell modules; a collector portion that collects power from the solar cell array; a power control portion that is connected to the collector portion and includes a power conversion portion which converts first power from the solar cell array into second power; a first electric wiring that connects the collector portion and the power control portion to each other; a first connection terminal that is supplied with the first power from the solar cell array; and a first switch portion that shuts off output from the solar cell array for the power conversion portion; wherein an alternative power control portion is connectable to the first connection terminal.01-31-2013
20130026842Enhanced System and Method for String-Balancing - Apparatuses and methods for configuring and managing solar panels to form strings of photovoltaic energy generators with improved performance and reduced cost. The photovoltaic energy generators are connected via one or more combined local management units (CLMUs), each having a plurality of direct current converters connected to and configured to receive direct current power from a respective solar panel. A controller unit shared by the CLMU's direct current converters is utilized to separately control the operation of each converter such that the power extracted from the solar panels is maximized. A communications unit coupled with the controller unit is utilized to facilitate communications between the controller unit and a system unit remote from the CLMU to report measurements and receive control signals.01-31-2013
20120175964SERIALLY CONNECTED INVERTERS - A photovoltaic power generation system, having a photovoltaic panel, which has a direct current (DC) output and a micro-inverter with input terminals and output terminals. The input terminals are adapted for connection to the DC output. The micro-inverter is configured for converting an input DC power received at the input terminals to an output alternating current (AC) power at the output terminals. A bypass current path between the output terminals may be adapted for passing current produced externally to the micro-inverter. The micro-inverter is configured to output an alternating current voltage significantly less than a grid voltage.07-12-2012
20130076151PHOTOVOLTAIC GENERATION SYSTEM USING PARALLEL INVERTER CONNECTED GRID - A photovoltaic generation system using grid-connected parallel inverters comprises a plurality of photovoltaic generation devices connected in parallel with each other, and a transformer configured to transform and transfer output voltages of the photovoltaic generation devices to a grid, wherein the photovoltaic generation device includes: a photovoltaic module configured to convert photovoltaic energy into DC electrical energy; an inverter configured to convert the DC electrical energy outputted from the photovoltaic module into AC electrical energy; an LC filter configured to remove noise included in the AC electrical energy which is outputted from the inverter; and a Y-connected capacitor group which is connected between one terminal of a reactor in the LC filter and one terminal of the photovoltaic module and is configured to reduce stray current.03-28-2013
20100019578Power Converter for Solar Electrical Current Installations and Method for Controlling it - A power converter arrangement with a plurality of d.c voltage inputs of a chronologically varying input voltage, preferably from a solar cell arrangement, is described. In this case, every d.c. voltage input is connected with an associated converter cell, which in turn has at least one step-up converter connected with the input poles, and a recovery diode arranged between the two output poles. Furthermore, the output poles of the converter cells are connected in series and thus constitute the summed d.c. voltage output. The associated method regulates the pulse width of the step-up converter of each converter cell in such a way that the power output of the converter cell fluctuates around the actual theoretical maximum value.01-28-2010
20130076150Acoustic Noise Modification in Power Converters - A boost converter including two or more inductors coupled to an input DC power source and to switches that can each be modulated with a modulation signal to control the output power of the boost converter. Two or more of the modulation signals have a relative phase other than 360° divided by the number of switches.03-28-2013
201300761523-PHASE HIGH POWER UPS - According to one aspect, embodiments of the invention provide a UPS comprising a plurality of electrical buses, a first AC/DC converter coupled to the electrical buses and configured to convert a first input AC voltage to a plurality of DC voltages, a second AC/DC converter coupled to the electrical buses and configured to convert a second input AC voltage to the plurality of DC voltages, a third AC/DC converter coupled to the electrical buses and configured to convert a third input AC voltage to the plurality of DC voltages, a first DC/AC converter configured to convert the plurality of DC voltages into a first output AC voltage, and a DC bus balancer configured to maintain voltages present on the electrical buses by transferring energy between the plurality of electrical buses.03-28-2013
20090160258Advanced Renewable Energy Harvesting - The power of DC electrical sources is combined onto a DC buss, such that each source behaves independently from any other source attached to the buss. In one embodiment, a converter module is attached to each of a plurality of solar photovoltaic panels and its output is attached in a parallel manner to a common buss that forms the input to a DC AC inverter. The converter module includes a Maximum Power Point Tracking component that matches the output impedance of the panels to the input impedance of the converter module. The converter also includes a communication component that provides parametric data and identification to a central inverter. Data generated by each converter module is transmitted over the power line or by wireless means and is collected at the inverter and forwarded to a data collection and reporting system.06-25-2009
20130043733APPARATUS AND METHOD FOR PRODUCING AC POWER - A multi-input electrical power conversion device is provided for converting multiple DC energies each arising from different junctions in a multi-junction solar cells into AC energy. The device includes a plurality of electrical inputs for receiving the multiple DC energies from at least one multi junction solar cell. The number of DC energies id no less than the number of junctions in the multi-junction solar cell. The device also includes at least one DC-to-AC circuit for receiving the multiple DC energies from the plurality of electrical inputs and at least one electrical output receiving at least one AC energy from the DC to AC circuit. The device also includes at least one MPPT circuit operatively coupled to the DC to AC circuit.02-21-2013
20130043732POWER GENERATING SYSTEM - The present invention is directed to a power generating system. At least one signal tracing unit receives an input signal, according to which a tracing signal is generated, wherein the waveform of the tracing signal traces the wave peak of the input signal. At least one DC to DC converter receives the tracing signal, according to which a power supply is generated.02-21-2013
20130038132CPV System and Method Therefor - A concentrated photovoltaic system (02-14-2013
20100109442System and Method for Energy Optimization in Photovoltaic Generators - An exemplary system for energy optimization in photovoltaic generators comprises a plurality of primary photovoltaic generators, a plurality of secondary photovoltaic generators, and a plurality of inverters. The secondary photovoltaic generators each comprise a plurality of photovoltaic generator blocks. The inverters are configured to convert direct voltage/current into alternating voltage/current. A first switching system is operable to selectively couple outputs of the primary generators with inputs of the inverters. A second switching system is operable to selectively couple outputs of the generator blocks with the outputs of the secondary generators. A control system is operable to automatically control the first switching system and the second switching system. An exemplary method comprises operating the control system to automatically control the two switching systems to optimize power provided to the inverters. The control system is responsive to data that includes detected and calculated operational, environmental, and historical data.05-06-2010
20130082534DOUBLE MODULE FOR A MODULAR MULTI-STAGE CONVERTER - A submodule for a high-voltage converter with reduced risk of cross-ignition includes first and second series-connected energy storage devices, first and second semiconductor series circuits connected in parallel with the energy storage devices, respectively, and having first and second, and respectively third and fourth, switched power semiconductor switching units. A first terminal connects to a first potential point between the first and second switching units, a second terminal connects to a second potential point between the third and fourth switching units. A connecting switching unit is connected between the first and second semiconductor series circuits. A first connecting branch with a first diode connects the first potential point and the potential point between the energy storage devices. A second connecting branch with a second diode connects the second potential point and the potential point between the energy storage devices. The connecting branch diodes are oriented in mutually opposite directions.04-04-2013
20090315403POWER SUPPLY SYSTEM, VEHICLE PROVIDED WITH THE SAME, TEMPERATURE RISE CONTROL METHOD OF POWER STORAGE DEVICE, AND COMPUTER-READABLE RECORDING MEDIUM WITH PROGRAM RECORDED THEREON FOR CAUSING COMPUTER TO EXECUTE TEMPERATURE RISE CONTROL OF POWER STORAGE DEVICE - During temperature rise control of a power storage device, a correction value calculation unit outputs a negative correction value when a voltage value exceeds an upper limit value. Thus, a duty command is corrected to be decreased. That is, duty command is corrected to increase a boost rate of a converter. Meanwhile, correction value calculation unit outputs a positive correction value when voltage value falls below a lower limit value. Thus, duty command is corrected to be increased. That is, duty command is corrected to lower the boost rate of the converter.12-24-2009
20090302686MULTIPHASE GRID SYNCHRONIZED REGULATED CURRENT SOURCE INVERTER SYSTEMS - Power from the dc outputs of wind-generated power collection nodes is converted to ac power of suitable quality for injection into an electric power grid. Conversion is accomplished by current regulation of the dc outputs of the wind-generated power collection nodes to the input of each one of multiple inverters in a system, with each inverter outputting multiple phase currents that are out of phase with the multiple phase currents outputted from all other inverters in the system. The multiple phase currents from all of the inverters in a system are connected to the secondary windings of a phase transformation network that produces a three phase current output having a step-shaped waveform for injection into the electric power grid. Alternatively the dc input to each one of the multiple inverters may be a combination of the dc outputs of wind-generated power collection nodes and the dc outputs of solar photovoltaic power collection nodes.12-10-2009
20130069439TRANSFORMERLESS CYCLOCONVERTER - The invention relates to a transformerless cycloconverter for connecting a first three-conductor grid (03-21-2013
20130069438SYSTEM AND METHOD FOR MAXIMIZING POWER OUTPUT OF PHOTOVOLTAIC STRINGS - A PV system includes a plurality of PV strings each having an optimal string voltage at which a string output power is maximized. The PV strings are connected to a DC link in a parallel arrangement such that each PV strings operates at a variable DC link voltage. A PV inverter is connected to the DC link to receive a DC output, with the PV inverter controlling the DC link voltage. Delta DC/DC converters are connected to the PV strings, with each DC/DC converter receiving the DC link voltage from the DC link and providing a tuning voltage to the DC link voltage at which its respective PV string operates in order to bring the string voltage for that PV string to its optimal string voltage. The tuning voltage of each delta DC/DC converter is the difference between the DC link voltage and a respective optimal string voltage.03-21-2013
20120112551INTELLIGENT POWER CONVERTER CONTROL FOR GRID INTEGRATION OF RENEWABLE ENERGIES - Embodiments according to the present invention provide methods and a system for a control approach that effectively maintains the DC link voltage at a constant set value under variable system conditions and keeps the converter operating with an optimal power factor range while limiting power quality effects and phase balance.05-10-2012
20120223584Novel Solar Panel String Converter Topology - The inventive technology, in certain embodiments, may be generally described as a solar power generation system with a converter, which may potentially include two or more sub-converters, established intermediately of one or more strings of solar panels. Particular embodiments may involve sweet spot operation in order to achieve improvements in efficiency, and bucking of open circuit voltages by the converter in order that more panels may be placed on an individual string or substring, reducing the number of strings required for a given design, and achieving overall system and array manufacture savings.09-06-2012
20120223583PHOTOVOLTAIC ENERGY EXTRACTION WITH MULTILEVEL OUTPUT DC-DC SWITCHED CAPACITOR CONVERTERS - Switched capacitor multilevel output DC-DC converters can be used as panel integrated modules in a solar maximum power point tracking system. The system can also include a central input current-controlled ripple port inverter. The system can implement per panel MPPT without inter-panel communication, electrolytic capacitors or per panel magnetics. A Marx converter implementation of the switched capacitor module is studied. Average total efficiencies (tracking×conversion) greater than 93% can be achieved for a simulated 510 W, 3 panel, DC-DC system.09-06-2012
20110012430SMART AND SCALABLE POWER INVERTERS - A method and apparatus is disclosed for intelligently inverting DC power from DC sources such as photovoltaic (PV) solar modules to single-phase or three-phase AC power to feed the power grid for electricity generation. A number of smart single-input, dual-input, triple-input, quad-input, and multiple-input power inverters in a mixed variety can easily connect to single, dual, triple, quad, and multiple DC power sources, invert the DC power to AC power, and daisy chain together to generate a total power, which is equal to the summation of the AC power supplied by each smart and scalable power inverter of this invention.01-20-2011
20110012429Method and apparatus for converting direct current to alternating current - A method and apparatus for power conversion. In one embodiment, the apparatus comprises at least two power stages, each power stage of the at least two power stages capable of converting DC input power to DC output power; and a controller for dynamically selecting, based on a first DC power, one or more power stages of the at least two power stages for converting the first DC power to a second DC power.01-20-2011
20130062958Low Profile Power Conversion System for Rooftop Photovoltaic Power Systems - The disclosed embodiments and principles provide a way to integrate high-efficiency, low-profile power electronics with localized maximum power point tracking (MPPT) into a rooftop shingle-based photovoltaic power system. DC-DC power converters having a height, or profile, as low as ¼ inch for a 200 W power output, are able to be included in a building-integrated photovoltaic (BIPV) roof shingle. The DC-DC power converters increase the relatively low voltage produced by two rows of series-connected photovoltaic shingles, each including photovoltaic cells, to a high voltage used by a DC-AC inverter. For example, DC-DC power converter increases the voltage produced by two rows of series-connected photovoltaic shingles from several tens of volts to approximately 400 volts. Thus, the DC-DC power converters provide a large voltage step-up using a low profile and with very high efficiency.03-14-2013
20130062956CELL-TO-GRID REDUNDANDT PHOTOVOLTAIC SYSTEM - In an embodiment, a photovoltaic system includes multiple photovoltaic modules and a module-to-module bus. Each photovoltaic module defines a first end and a second end opposite the first end. Each photovoltaic module includes multiple photovoltaic cells and multiple converters. Energy generated by each photovoltaic cell has multiple paths through the photovoltaic cells to the second end. The converters are electrically coupled to the photovoltaic cells at the second end such that energy generated by each photovoltaic cell is receivable at any of the converters. The module-to-module bus is electrically coupled to each of the photovoltaic modules. The module-to-module bus has an output. Energy generated by each photovoltaic module is receivable at the output independent of any other of the photovoltaic modules.03-14-2013
20130062957METHOD AND AREA ELECTRIC POWER SYSTEM DETECTING ISLANDING BY EMPLOYING CONTROLLED REACTIVE POWER INJECTION BY A NUMBER OF INVERTERS - An area electric power system includes a number of direct current power sources, and a number of inverters operatively associated with the number of direct current power sources. Each of the number of inverters is structured to provide real power and controlled reactive power injection to detect islanding. An output is powered by the number of inverters. A number of electrical switching apparatus are structured to electrically connect the number of inverters to and electrically disconnect the number of inverters from a utility grid. A number of devices are structured to detect islanding with respect to the utility grid responsive to a number of changes of alternating current frequency or voltage of the output.03-14-2013
20130162049Reactive Energy Compensator and Method for Reducing the Associated Flickering Phenomenon - A reactive energy compensator (06-27-2013
20090236917Method for activating a multi-string inverter for photovoltaic plants - A method of activating a Multi-String inverter for photovoltaic generators (09-24-2009
20120235498AUTOMATIC VOLTAGE REGULATION FOR PHOTOVOLTAIC SYSTEMS - A photovoltaic system includes solar cells and photovoltaic inverters configured to convert direct current generated by the solar cells to alternating current. Grid voltage at the point of interconnection (POI) of the photovoltaic system and the power grid is measured and compared to a setpoint. A control signal is generated based on the measured grid voltage. The control signal is provided to the photovoltaic inverters. The control signal is adjusted to cause the photovoltaic inverters to generate or absorb reactive power to respond to transient grid voltage changes.09-20-2012
20130162047Methods and Systems For Controlling An Intra-Plant Voltage Level - A power plant coupled to, and configured to provide power to, an electrical grid, is described. The power plant includes a plurality of power converters electrically coupled to, and configured to receive power from, at least one power source. The power plant also includes a voltage regulation device electrically coupled between the power converters and the electrical grid. The voltage regulation device includes a series transformer and a bi-directional converter configured to regulate a voltage at an output of the power converters.06-27-2013
20130162048POWER MODULE AND MULTI POWER SUPPLY APPARATUS HAVING THE SAME - There are provided a power module and a multi power supply apparatus having the same. The multi power supply apparatus includes a plurality of power modules connected in parallel with each other and supplying a preset power, each power module including: a DC/DC converting unit converting an input power into a preset DC power; an output controlling unit switched on or switched off according to a difference between a voltage level of the DC power of the DC/DC converting unit and a voltage level applied to a load end to control an output of the DC power; and a controlling unit starting a soft start operation of the DC/DC converting unit during a hot swap in which the power module is replaced and stopping the soft start operation of the DC/DC converting unit when the output controlling unit is switched on.06-27-2013
20120098346Renewable Energy Power Generation Systems - We describe a modular adjustable power factor renewable energy inverter system. The system comprises a plurality of inverter modules having a switched capacitor across its ac power output, a power measurement system coupled to a communication interface, and a power factor controller to control switching of the capacitor. A system controller receives power data from each inverter module, sums the net level of ac power from each inverter, determines a number of said capacitors to switch based on the sum, and sends control data to an appropriate number of the inverter modules to switch the determined number of capacitors into/out of said parallel connection across their respective ac power outputs.04-26-2012
20110278938AC BATTERY EMPLOYING MAGISTOR TECHNOLOGY - A DC/AC converter incorporates at least one Magistor module having a first sp control switch, a second sz control switch and a third sm control switch. An AC source is connected to an input of the at least one Magistor module. A switch controller connected to the first sp control switch, second sz control switch and third sm control switch to and provides pulse width modulation (PWM) activation of the switches for controlled voltage at an output.11-17-2011
20110285208POWER SUPPLY METHOD WITH PARALLEL-CONNECTED BATTERIES - A power supply method with parallel-connected batteries employs at least two parallel-connected power supply branches, each of which includes a battery, a step-up circuit, and a step-down circuit, and each of which is installed with an individual control unit. The battery offers a low voltage transformed into a high voltage via the stepping-up. The high voltage thence acquires a needed power-supply voltage through the transformation executed by the step-down circuit. An anode of an output of the power supply branch serially connected with a diode prevents the other power supply branch from a reverse current. A cathode of the output serially connected with a current limiting resistance balances the currents on each power supply branch. Accordingly, the present invention diminishes the workload of the device maintenance, lessens users' investment pressure, and provides electricity systems of the power plant and the substation with a consistent direct current power source.11-24-2011
20120187768LOW FILTER CAPACITANCE POWER SYSTEMS, STRUCTURES, AND PROCESSES FOR SOLAR PLANTS - DC to DC converters are connected in parallel to a DC buss that is input to a DC to AC inverter module. Each of the DC to DC converters receives input from one or more DC electrical sources. The inverter module typically comprises a DC to AC power stage that is connectable to an AC buss, and a filter connected between the DC buss and the DC to AC power stage. The filter may comprise one or more capacitors, wherein the capacitors may be chosen based upon the voltage of the DC buss. While the DC buss may have a voltage ripple associated therewith, the DC electrical sources are protected from the DC voltage ripple by their respective converter modules.07-26-2012
20100244575METHOD FOR CONTROLLING SINGLE-PHASE DC/AC CONVERTERS AND CONVERTER ARRANGEMENT - A method is disclosed for controlling single-phase DC/AC converters, along with a converter arrangement having at least two single-phase DC/AC converters. A controller is provided which can control the at least two single-phase DC/AC converters, and an isolation transformer, wherein outputs of the at least two single-phase DC/AC converters are cascade-connected with each other and an input of the isolation transformer. The controller is configured to control the at least two single-phase DC/AC converters to deliver power from their inputs to their outputs by turns.09-30-2010
20120104861HIGH VOLTAGE ELECTRIC ACCUMULATORS WITH INTERNAL DISTRIBUTED DC-DC CONVERTERS FOR SELF REGULATION AND PROTECTION - A power management system may employ a power source, a distribution system between the power source and electrical loads and an energy accumulator. The accumulator may comprise a plurality of energy processing blocks. Each block may have a limited number of energy storage cells connected in series to produce first voltage. A second higher output voltage from the accumulator may be achieved though integrated DC-DC, DC-AC and AC-DC conversion with intermediate boost of AC voltage through high frequency transformers. Bidirectional power flow may be achieved with high efficiency during charge and discharge of the accumulator. Secondary windings of the transformers may be connected with one another in series so that the accumulator can transfer energy between the distribution system and any one or all of the energy processing units in a fault-tolerant and efficient manner.05-03-2012
20110298292PHOTOVOLTAIC SYSTEM FOR FEEDING THREE-PHASE CURRENT INTO A POWER GRID - The invention relates to a photovoltaic system for feeding three-phase current to a power grid that includes several monophase or three-phase photovoltaic inverters that can be connected to the power grid at the output end and are each fitted with a disconnecting device at the output end. The system includes several photovoltaic generators that are connected to the input end of the photovoltaic inverters. A central control and monitoring unit is connected between the photovoltaic inverters and the power grid. The control and monitoring unit has a grid monitoring device at the feeding point to the grid to measure one or more grid parameters. At least one communication link is provided between the individual photovoltaic inverters or the individual disconnecting devices and the connected central control and monitoring unit such that the connecting devices can disconnect the individual photovoltaic inverters from the power grid by means of a control instruction signal of the communication link. The central control and monitoring unit includes a load unbalance recognition component and a load unbalance regulation component, wherein the regulation includes limiting the power variation between the individual phases to a predetermined value.12-08-2011
20090179500MULTI-CELLULAR PHOTOVOLTAIC PANEL SYSTEM WITH DC-DC CONVERSION REPLICATED FOR GROUPS OF CELLS IN SERIES OF EACH PANEL AND PHOTOVOLTAIC PANEL STRUCTURE - A photovoltaic energy conversion system includes a distributed control structure for groups of cells of each multi-cellular panel, the components of which are entirely physically integrated in the photovoltaic panel. Each multi-cellular photovoltaic panel has a DC bus, supplied in parallel by a plurality of DC-DC converters, each provided with a controller that controls the working point of the photovoltaic cells coupled to the input of the DC-DC converter for a maximum yield of electric power by implementing a relatively simple MPPT algorithm. The controller includes a logic circuit and A/D converters of analog signals representing the input voltage and the input current generated by the group of cells that is coupled to the input of the DC-DC converter and optionally also of the output voltage of the converter, and a relatively simple D/A converter of the drive control signal of the power switch of the DC-DC converter.07-16-2009
20100033019MODULAR SOLAR DEVICE POWER DISTRIBUTION - A system includes a power distributor having a power collection rail and a power management rail disposed within a track. A first module having a solar collector is adapted to couple to the track and electrically connect to the power collection rail. A rechargeable battery provides direct current (DC) power to the power management rail. A controller is coupled the battery and to the track to receive power from the power collection rail to recharge the battery. Various modules having solar collectors, batteries and devices may be coupled to the track.02-11-2010
20090189455SOLID STATE POWER CONTROLLER (SSPC) USED AS BUS TIE BREAKER IN ELECTRICAL POWER DISTRIBUTION SYSTEMS - The present invention provides an electrical power distribution system that includes a first primary distribution panel (PDP) connected to a first source of electrical power and a second PDP connected to a second source of electrical power. The second PDP is connected to the first PDP by a conductor. A first solid state power controller (SSPC) receives signals corresponding to the flow of current through the first PDP to a load. A second SSPC receives signals corresponding to the flow of current between the first PDP and the second PDP. The first and second SSPC protect the electrical power distribution system from a variety of fault conditions.07-30-2009
20110260547ELECTRICAL SYSTEM AND CONTROL METHOD - A method of controlling electrical power systems coupled to an electrical connection point includes obtaining carrier signals and fundamental waveforms from electrical power systems coupled to at least two renewable energy sources, generating pulse width modulation (PWM) signals using the carrier signals and the fundamental waveforms while interleaving carrier signals, fundamental waveforms, or a combination of carrier signals and fundamental waveforms of the electrical power systems, and driving grid side converters of the electrical power systems with the PWM signals.10-27-2011
20080284252Control methods for the synchronization and phase shift of the pulse width modulation (PWM) strategy of power converters - A method of controlling a plurality of power converters 11-20-2008
20100283326APPARATUS AND METHOD FOR CONTROLLING A POWER SUPPLY - In an electrical power supply having a plurality of switching power converter circuits and configured to supply a voltage to an electrical load, a method of controlling a duty cycle of at least one switch of one of the plurality of switching power converter circuits includes determining a storage voltage produced by the one of the plurality of energy storage devices. The method further includes determining an average storage voltage corresponding to an average of storage voltages produced by each of the plurality of energy storage devices. The method further includes determining at least one control signal as a function of the storage voltage, the average storage voltage, and a reference voltage. The method further includes controlling the duty cycle of the at least one switch of the one of the plurality of switching power converter circuits based upon the at least one control signal.11-11-2010
20110062786ELECTRIC POWER GENERATING SYSTEM FOR MULTIPLE SOURCES AND INTERFACE TO AN AC GRID - An electric power generating system includes a plurality of variable power sources including at least one source of DC power and at least one source of AC power. Converters convert power supplied by the plurality of power sources to a common source of power to be communicated to a collector bus. A power grid supplies three-phase power to components requiring three-phase power downstream of the collector bus. Converters provide three phases of power to the power bus from the collector bus.03-17-2011
20100084924APPARATUS AND METHOD FOR PRODUCING AC POWER - A multi-input electrical power conversion device is provided for converting multiple DC energies each arising from different junctions in a multi-junction solar cells into AC energy. The device includes a plurality of electrical inputs for receiving the multiple DC energies from at least one multi junction solar cell. The number of DC energies id no less than the number of junctions in the multi-junction solar cell. The device also includes at least one DC-to-AC circuit for receiving the multiple DC energies from the plurality of electrical inputs and at least one electrical output receiving at least one AC energy from the DC to AC circuit. The device also includes at least one MPPT circuit operatively coupled to the DC to AC circuit.04-08-2010
20090284079APPARATUS AND METHOD FOR CONTROLLING THE MOTOR POWER - The invention concerns a power control apparatus and a method for supplying power between an electric machine and an energy source. The power control apparatus contains at least two converters comprising a plurality of switches, at least some of which switches belong to a set of switch modules comprising a plurality of switches. In the method of the invention, a first set of switches belonging to at least two different modules and arranged to form a first converter is controlled by a first converter control, and a second set of switches arranged to form a second converter is controlled by a second converter control.11-19-2009
20110198936Circuit Arrangement Including a Multi-Level Converter - Disclosed is a circuit arrangement including at least one multi-level-converter.08-18-2011
20090009005Control method for parallel redundant power system - A method for controlling the power system is presented. The power system is composed of at least one inverter for supplying AC power to a load through a bus, a phase lock system to synchronize all output voltages of the inverters and a current sharing circuit to properly distribute the load current among all inverters. Each inverter is controlled by an unbalanced power to limit the increase of its cross current. Moreover, the information related to DC bus voltage is further applied to control the inverters, whereby the cross current is mitigated and entire power system is operated steadily.01-08-2009
20090261658Power supply system, vehicle having power supply system, and control method of power supply system - A discharge distribution ratio calculating unit calculates a discharge distribution ratio, according to the ratio between an amount of electric power allowed to be discharged from a first storage device connected to a first converter, and the sum of amounts of electric power allowed to be discharged from second and third storage devices. A charge distribution ratio calculating unit calculates a charge distribution ratio, according to the ratio between an amount of electric power with which the first storage device is allowed to be charged, and an amount of electric power with which the storage device electrically connected to the second converter by a switching device is allowed to be charged. Then, the first and second converters are controlled according to the discharge distribution ratio in a discharge mode, or according to the charge distribution ratio in a charge mode.10-22-2009
20120293004PARALLEL RUNNING CONTROL APPARATUS FOR INVERTER GENERATORS - In a parallel running control apparatus for inverter generator A having first, second and third inverters adapted convert alternating current outputted from windings wound around an alternator into direct/alternating current by driving switching elements, and CPUs to control turning ON/OFF of the switching elements, it is configured so that the generator A runs in parallel with at least one inverter generator B, which is configured to be same as the inverter generator A, to output a three-phase alternating current, and one of the CPU determines that the generator B was stopped when at least one of phase differences between a phase of an output from the first inverter and phases of outputs from the second and third inverters becomes greater than or equal to a predetermined value.11-22-2012
20100201200Power Supply Circuit - A power supply circuit includes a first DC-DC converter, a second DC-DC converter, a voltage detection circuit, a delay circuit and a switch. The second DC-DC converter converts an output voltage of the first DC-DC converter into a second voltage and outputs the second voltage. The voltage detection circuit outputs a detection signal when an output voltage of the first DC-DC converter becomes a threshold voltage or more. The delay circuit outputs a delayed detection signal with a delay of a predetermined time from a point of time that the detection signal outputted from the voltage detection circuit is inputted to the delay circuit. The switch is connected between the first DC-DC converter and an output terminal. The second DC-DC converter starts an operation in response to the delayed detection signal outputted from the delay circuit. The switch is closed in response to an output from the second DC-DC converter.08-12-2010
20090315404SOLAR POWER PLANT - A solar power plant with a plurality of photovoltaic modules for generating a power to be fed in a multi-phase grid, several photovoltaic strings, which are allocated to different phases, being connected to a primary side of a mains transformer and at least one inverter for converting the direct voltage generated by the photovoltaic modules into an alternating mains voltage conforming to the grid being provided and said mains transformer being provided with a neutral conductor and with a grounded terminal, is intended to be improved in such a manner that the life of the photovoltaic modules, in particular in case of thin-film modules, is increased, allowing for high conversion efficiency of the inverters at low wiring costs. This is achieved in that an additional direct voltage source is inserted between the neutral conductor and ground in such a manner that the potential of the photovoltaic strings is displaced and that a bias voltage is set, which is different from zero volt.12-24-2009
20100264744Solar Inverter Having a Plurality of Individual Inverters Connected In Parallel And Having a Primary Electronic Control Unit - A solar inverter comprising a plurality of individual inverters connected in parallel and each having a power unit for converting a field voltage on the input side into a mains voltage on the output side, and having a primary electronic control unit that is configured to perform all primary control functions and control functions that can be associated with the individual inverters.10-21-2010
20090146500Power converters - The present invention provides a power converter that can be used to interface a generator (06-11-2009
20110006609PHOTOVOLTAIC POWER SYSTEM - A photovoltaic power system includes module strings each having photovoltaic modules connected in series. The power system further includes a generator terminal box having DC converters. The power system further includes a generator main connection line and an AC inverter. Each module string is electrically connected to a respective one of the DC converters for the module string to provide a DC voltage generated by the photovoltaic modules of the module string to the respective DC converter. The DC converters output a combined DC voltage based on the DC voltages from the module strings to the AC inverter via the generator main connection line for the AC inverter to transform the combined DC voltage into an AC voltage. The generator terminal box and the AC converter are spatially separate from one another.01-13-2011
20130214607ELECTROMAGNETIC INTERFERENCE CANCELLING DURING POWER CONVERSION - Apparatus for cancelling electromagnetic interference (EMI) during power conversion. In one embodiment, the apparatus comprises a power converter for converting a DC input to a DC output, wherein the power converter comprises a transformer having a primary winding and a secondary winding, the secondary winding coupled to a diode such that a plurality of secondary winding voltages cause a balanced current flow through a plurality of parasitic capacitances.08-22-2013
20100141041DC-TO-AC POWER CONVERSION SYSTEM AND METHOD - A system, in one embodiment, includes a photovoltaic power converter. The photovoltaic power converter includes one or more photovoltaic arrays configured convert solar energy into a DC signal and two or more N-level converters coupled to a common DC bus (N being an integer greater than 2).06-10-2010
20090160259Distributed Energy Conversion Systems - A distributed energy conversion system may include one or more DC power sources and two or more inverters to convert DC power from the power sources to AC power. The AC power from the two or more inverters may be combined to provide a single AC output. A module may include one or more photovoltaic cells and two or more inverters. An integrated circuit may include power electronics to convert DC input power to AC output power and processing circuitry to control the power electronics. The AC output power may be synchronized with an AC power distribution system.06-25-2009
20090085405POWER CONVERSION DEVICE - A power conversion device including sub-inverters, each connected in series with respective phase of a three-phase main inverter including a smoothing capacitor, which is fed from a power supply via a converter, as a DC input thereof, and feeds power to a load using the sum of outputs of the inverters. A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors which is an input of each of the sub-inverters will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter, and is subtracted from an output voltage command for the sub-inverters. Thus, power is shifted from the three-phase main inverter to the smoothing capacitors of the sub-inverters.04-02-2009
20100033020POWER DEVICE AND POWER DEVICE POWER SUPPLY METHOD - A power device of the present invention makes a plurality of DC/DC converters redundant, and supplies power individually to a plurality of disk drives. Each first DC/DC converter is respectively made correspondent to a subgroup. One first DC/DC converter is connected to the disk drives respectively inside one subgroup, and the other first DC/DC converter is connected to the disk drives inside the other subgroup. A second DC/DC converter is made correspondent to all of the subgroups. Second DC/DC converters respectively supply direct-current power to any one disk drive of the disk drives in the subgroups.02-11-2010
20090284078System and method for integrating local maximum power point tracking into an energy generating system having centralized maximum power point tracking - A system for integrating local maximum power point tracking (MPPT) into an energy generating system having centralized MPPT is provided. The system includes a system control loop and a plurality of local control loops. The system control loop comprises a system operating frequency, and each local control loop comprises a corresponding local operating frequency. Each of the local operating frequencies is spaced apart from the system operating frequency by at least a predefined distance. For a particular embodiment, a settling time corresponding to the local operating frequency of each local control loop is at least five times faster than a time constant corresponding to the system operating frequency.11-19-2009
20120104863System and Method for Combining Electrical Power from Photovoltaic Sources - A photovoltaic system with photovoltaic (PV) panels is described. Each of the PV panels has a corresponding inverter module. The inverter module includes a maximum power point tracker (MPPT) for independently monitoring and controlling the respective PV panel, a switch regulator for converting the DC output to an AC output; an insulating transformer for receiving the AC output and inverting the AC output at about the first voltage to a second voltage; and a rectifier for rectifying the AC output to a second DC output at about the second voltage. The photovoltaic system further includes a main inverter with two power terminals. The second DC outputs of the inverter modules are connected in parallel to the two power terminals at the second voltage, and the second DC outputs are inverted to an AC power by the main inverter.05-03-2012
20120104862PHOTOELECTRIC CONVERSION DEVICE - A photoelectric conversion device includes at least two photoelectric conversion elements which have voltage-current characteristics different from each other. Further, one of the photoelectric conversion elements has photoelectric conversion efficiency higher than that of the other photoelectric conversion element under the environment in which room light can be obtained. Furthermore, the other photoelectric conversion element has photoelectric conversion efficiency higher than the one of the photoelectric conversion elements under the environment in which sunlight can be obtained. Moreover, each of the voltage of electric power generated in the at least two photoelectric conversion elements is adjusted by one of at least two DC-DC converters corresponding the photoelectric conversion element. In addition, part of the electric power generated in the one of the photoelectric conversion elements is used as drive electric power of the at least two DC-DC converter.05-03-2012
20120139349METHOD AND APPARATUS FOR APPLYING AN ELECTRIC FIELD TO A PHOTOVOLTAIC ELEMENT - A method and apparatus for applying an electric field to a photovoltaic element. In one embodiment, the apparatus comprises at least one photovoltaic (PV) cell having a P-N junction; and a voltage supply for (i) converting a first voltage to an e-field voltage, the first voltage generated local to the at least one PV cell, and (ii) coupling the e-field voltage to the at least one PV cell to create an electric field extending across the P-N junction.06-07-2012
20090140577Multiphase Grid Synchronized Regulated Current Source Inverter Systems - Electric power from typically unstable multiple dc sources is converted to ac electric power of suitable quality for injection into an electric power grid. Conversion is accomplished by current regulation of the output from the dc sources to the input of each one of multiple inverters in a system, with each inverter outputting multiple phase currents that are out of phase with the multiple phase currents outputted from all other inverters in the system. The multiple phase currents from all of the inverters in a system are connected to the secondary windings of a phase transformation network that produces a three phase current output having a step-shaped waveform for injection into the electric power grid.06-04-2009
20110140535POWER CONVERTING DEVICE FOR NEW RENEWABLE ENERGY STORAGE SYSTEM - A power converting device for a new renewable energy storage system includes rechargeable batteries, bidirectional converters respectively connected in parallel to the batteries, direct current (DC) links connected in parallel to the bidirectional converters, respectively, bidirectional inverters connected in parallel to the DC links, respectively, and an electric power system connected to the bidirectional inverters. The bidirectional inverters are cascade H-bridge multi-level boost inverters. The DC links are charged by the bidirectional inverters connected to the battery and a charged voltage of the DC links is provided to the electric power system by the bidirectional inverters. In addition, the DC links are charged by the bidirectional inverters connected to the electric power system and a charged voltage of the DC links is provided to the battery by the bidirectional inverters.06-16-2011
20110140536CURRENT BYPASS FOR DISTRIBUTED POWER HARVESTING SYSTEMS USING DC POWER SOURCES - A converter circuit providing multiple current bypass routes between the output leads to provide reliability in a series connection of several converters. If the converter malfunctions due to component failure, the current bypass routes provide a path for the current that views the malfunctioning converter as substantially a short. Diodes prevent backflow into the power source connected to the converter. Redundancy is provided in the bypass portions of the converter circuit that provides alternate parallel paths in case a defective component in one of the paths opens the circuit along that path. In one example, the converter is implemented as a buck plus boost converter where either the buck or the boost portion or both are operative responsive to a controller controlling the switches of both portions. Most of the converter circuit may be implemented in an integrated circuit.06-16-2011
20090085406Electric Horizontal Directional Drilling Machine System - An electric horizontal directional drilling machine. An electric horizontal directional drilling machine is powered by an electric power assembly. The power assembly is made up of a fuel cell and inverter, or multiple fuel cells with synchronized inverters, are used to power an electric motor controller and electric motor. The electric motor operates hydraulic pumps used to advance a drill string and downhole tool through the earth and operate various machine functions. Mechanical functions of the drilling machine may also be satisfied through the use of electric rotary actuators (e.g., motors) and linear actuators (e.g., linear motors and solenoids).04-02-2009
20100270864GENSET SYSTEM WITH ENERGY STORAGE FOR TRANSIENT RESPONSE - A power generating system having a variable speed genset is provided. The variable speed genset includes an engine and a variable speed generator. The variable speed generator is mechanically coupled to the engine and is configured to generate electrical power. The power generating system further includes an energy storage device, which is charged or discharged during transient load conditions of a power grid. The power generating system includes a controller to generate a speed control signal to select a speed for the genset. The speed control signal is selected based upon stored energy in the energy storage device and power generating system conditions, power grid conditions or combinations thereof.10-28-2010
20100156192ELECTRICAL SYSTEM AND CONTROL METHOD - A power generation system comprises at least two electrical systems connected at an electrical connection point. Each electrical system comprises a power conversion system comprising a converter including a plurality of switches for converting direct current power into alternating current power. The power generation system comprises a control system including at least two pulse width modulation (PWM) modulators, each PWM modulator for obtaining a fundamental waveform and a carrier signal, using the fundamental and carrier signals to generate a PWM pattern, and for providing the PWM pattern to a respective converter for driving the switches of the respective converter. The control system is configured to interleave carrier signals, fundamental waveforms, or a combination of carrier signals and fundamental waveforms of the at least two electrical systems to generate interleaved PWM patterns respectively for the at least two converters.06-24-2010
20130214608POWER CONTROL DEVICE - To solve problems arising when a power conditioner equivalent to that connected to a solar panel is connected to a power storage device.08-22-2013
20100007212SOLAR INVERTER AND PLANT FOR CONVERTING SOLAR ENERGY INTO ELECTRICAL ENERGY - There is described a plant (01-14-2010
20100277002POWER CONVERSION SYSTEMS - In a general aspect, a power conversion system includes a power converter, a transformer, and a voltage adjustment device. The power converter is configured to receive a variable DC power generated by a power generation device and to convert the received DC power to AC power at a first voltage. The transformer is configured to receive the AC power from the power converter and to deliver AC power at a second voltage to a utility power network. The voltage adjustment device is configured to adjust the first voltage to a target value determined on the basis of a voltage of the DC power.11-04-2010
20120139353METHOD FOR CONTROLLING AN ENERGY CONVERSION SYSTEM - The present invention discloses a method for controlling a back-to-back converter when disturbances are produced in the grid which limit the capacity of the converter (06-07-2012
20100253151GRID TIE SOLAR SYSTEM AND A METHOD - A grid tie system includes a plurality of solar panels, a plurality of inverters, wherein each of the inverters is in electrical communication with at least one of the solar panels to convert a direct current to an alternating current, wherein each of the inverters has an active state and an inactive state and at least one of the inverters includes a tracking component to track a maximum power point of at least one of the solar panels, and a controller in communication with at least one of the inverters for selectively toggling the at least one of the inverters between the active state and the inactive state.10-07-2010
20110057516THREE PHASE POWER GENERATION FROM A PLURALITY OF DIRECT CURRENT SOURCES - A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provides pulse amplitude modulated current at its three output terminals, wherein the current of each terminal is one hundred twenty degrees out of phase with the other two terminals. The pulses are produced at a high frequency relative to the signal modulated on a sequence of pulses. The signal modulated onto a sequence of pulses may represent portions of a lower frequency sine wave or other lower frequency waveform, including DC. When each phased output is connected in parallel with the outputs of similar PAMCCs an array of PAMCCs is formed, wherein each voltage phased output pulse is out of phase with respect to a corresponding current output pulse of the other PAMCCs. An array of PAMCCs constructed in accordance with the present invention form a distributed three-phase multiphase inverter whose combined output is the demodulated sum of the current pulse amplitude modulated by each PAMCC on each phase.03-10-2011
20130127251Circuit Arrangement Including a Multi-Level Converter - Disclosed is a circuit arrangement including at least one multi-level-converter.05-23-2013
20090322154Power System and Method for Supplying AC Power - Upon receiving a supply start instruction, each vehicle (12-31-2009
20100133913CONTROL DEVICE AND CONTROL METHOD FOR ELECTRIC SYSTEM - An electric system including a first converter and a second converter connected in parallel executes a program including a step of controlling a value of a voltage of a section between the first converter and the second converter to be higher by a predetermined value than either voltage value V(06-03-2010
20100133912AUXILIARY DRIVE APPARATUS AND METHOD OF MANUFACTURING SAME - An auxiliary drive circuit including a first energy storage device coupled to a first DC bus and configured to output electrical power to the first DC bus, and a first DC-to-DC voltage converter coupled to the first DC bus and to a second DC bus, the first DC-to-DC voltage converter configured to convert the electrical power to a first voltage and to output the first voltage to the second DC bus. The auxiliary drive circuit also includes a second DC-to-DC voltage converter coupled to the second DC bus and coupled to an auxiliary bus, the second DC-to-DC voltage converter configured to convert the first voltage to a second voltage and to provide the second voltage to the auxiliary bus, the auxiliary bus configured to provide an auxiliary voltage to an auxiliary load, wherein the second voltage is different from the first voltage.06-03-2010
20110031816PHOTOVOLTAIC UNIT, A DC-DC CONVERTER THEREFOR, AND A METHOD OF OPERATING THE SAME - A photovoltaic unit is disclosed comprising a plurality of sub-units connected in series, each sub-unit having a main input and a main output, which main output is connected to the respective main input of a neighbouring sub-unit, each sub-unit further comprising a segment comprising one or more series-connected solar cells, and a supplementary power unit, wherein the supplementary power unit is configured to at least one of receive power from or supply power to the neighbouring sub-unit. The supplementary power unit is preferably a DC-DC converter, and arranged to exchange energy between neighbouring segments, without requiring a high-voltage connection across the complete string (of more than 2 segments). The converter may be inductive or capacitive.02-10-2011
20110018354Power System And Control Method Thereof - A power system and a control method thereof are disclosed. The power system comprises: providing a plurality of power sources; electrically connecting a plurality of converters between the power sources and at least one load, wherein the converters are electrically connected to the power sources respectively in a one-to-one manner; and positive feed-forward controlling each of the converters by using a positive feed-forward control circuit electrically connected to one of the power sources in a one-to-one manner.01-27-2011
20110115300CONVERTING DEVICE WITH MULTIPLE INPUT TERMINALS AND TWO OUTPUT TERMINALS AND PHOTOVOLTAIC SYSTEM EMPLOYING THE SAME - A converting device with multiple input terminals and two output terminals is disclosed for converting Direct Current (DC) power from a power source to Alternating Current (AC) power. The converting device includes N pairs of input electrodes (N is an integer and N≧2), configured to receive the DC power from the power source, N maximum power point trackers, each coupled to one pair of the N pairs of input electrodes, configured to track a maximum power operation point for the DC power received from the one pair of the N pairs of input electrodes, two DC/DC converters, each coupled to one of the N maximum power point trackers, configured to convert a DC voltage received from the one of the N maximum power point trackers, a DC/AC inverter, coupled to the N DC/DC converters, configured to convert N DC voltages provided by the N DC/DC converters to an AC output signal, and a controller, coupled to the N DC/DC converters and the DC/AC inverter, configured to control the DC/DC conversion operation of the N DC/DC converters and the DC/AC conversion operation of the DC/AC inverter.05-19-2011
20090033156EFFICIENT OPERATING POINT FOR DOUBLE-ENDED INVERTER SYSTEM - Systems and methods are provided for controlling a double-ended inverter system coupled to a first energy source and a second energy source. The method comprises determining a constant power line associated with operation of the double-ended inverter system, the constant power line representing a desired power flow to the second energy source. The method further comprises determining an operating point on the constant power line, the operating point producing a minimum power loss in the double-ended inverter system for a required output current, and modulating the double-ended inverter system using a first voltage command and a second voltage command corresponding to the operating point.02-05-2009
20110241433DC TRANSMISSION SYSTEM FOR REMOTE SOLAR FARMS - A DC transmission system for solar arrays comprises a system DC link for receiving power from the solar arrays through series coupled DC to DC converter. DC to AC power converter modules are coupled in series between the system DC link and a power grid.10-06-2011
20110210614Power storage system and method of controlling the same - A power storage system and a method of controlling the same include supplying power to a load by connecting a power generation system and a grid. The system includes a power converting unit that operates in one of at least two control modes including a maximum power point tracking control mode in which the power generation system is controlled to generate maximum power and a voltage control mode in which a boosting ratio is adjusted according to a change in the amount of power consumed by a load. The system also includes a direct current (DC)/DC converter for converting an output voltage of the power converting unit into a DC link voltage, an inverter for converting the DC link voltage into an alternating current (AC) voltage appropriate for the grid, and a central controller for controlling operations of the power converting unit, the DC/DC converter, and the inverter.09-01-2011
20110084557MAXIMUM POWER POINT TRACKING SOLAR POWER SYSTEM - A solar power system includes a number of solar panels, a bus, and a DC-AC inverter. Each of the solar panels includes a plurality of photovoltaic chips and a DC-DC converter wherein the photovoltaic chips are serially connected and configured for converting sunlight energy into electrical power. The DC-DC converter is configured for converting the voltage generated by the photovoltaic chips of each solar panel to a common voltage value. The bus electrically connects to the DC-DC converters for receiving the electrical power generate from the solar panels. The DC-AC inverter connects to the bus to invert the DC voltage of the bus into AC voltage.04-14-2011
20090218888POWER ELECTRONIC ARCHITECTURE FOR MANAGING FUEL CELL MODULES AND METHOD THEREFOR - A system for managing electrical power has a plurality of storage devices. A plurality of DC-DC power converters are provided wherein one DC-DC power converter is coupled to each of the plurality of storage devices. Outputs of the plurality of DC-DC power converters are coupled in parallel to form a distribution bus. A plurality of sensors is coupled to the outputs of the plurality of DC-DC power converters for power monitoring of the system. A control unit is coupled to the plurality of sensors and to the plurality of DC-DC power converters to regulate an output signal of each DC-DC power converter based on signals received from the sensors09-03-2009
20100013317Integrated fuel cell system with auxiliary power delivery - A method of providing electrical power using a split bus configuration includes receiving a first direct current at a positive bus of a split bus, where the first direct current originates from a first fuel cell segment. A second direct current is received at a negative bus of the split bus, where the second direct current originates from a second fuel cell segment. A third direct current is also received at the split bus such that a combined direct current is formed including the first direct current, the second direct current, and the third direct current. The third direct current originates from an alternative direct current (DC) source. The combined direct current is provided to an inverter such that an alternating current is generated for a load.01-21-2010
20100038968Systems for Boundary Controlled Solar Power Conversion - A high efficiency photovoltaic DC-DC converter achieves solar power conversion from high voltage, highly varying photovoltaic power sources to harvest maximum power from a solar source or strings of panels for DC or AC use, perhaps for transfer to a power grid at high power levels with coordinated control possible for various elements. Photovoltaic DC-DC converters can achieve efficiencies in conversion that are extraordinarily high compared to traditional through substantially power isomorphic photovoltaic DC-DC power conversion capability that can achieve 97%, 98%, 99.2% efficiency, or even only wire transmission losses. Switchmode impedance or voltage conversion circuit embodiments may have pairs of photovoltaic power interrupt switch elements and pairs of photovoltaic power shunt switch elements to first increase voltage and then decrease voltage as part of the desired photovoltaic DC-DC power conversion.02-18-2010
20120068547ELECTRONIC MANAGEMENT SYSTEM FOR PHOTOVOLTAIC CELLS - An electronic management system for a photovoltaic generator is disclosed herein. The, the electronic management system comprises a plurality of static microconverters, each microconverter being electrically connected to one or more photovoltaic cells, the one or more photovoltaic cells forming a portion of a whole of the cells of the generator, a reconfiguration module adapted for transmitting energy flows from said microconverters towards a load, and a central electronic unit adapted for controlling a modification of the energy flows transmitted by said at least one reconfiguration module.03-22-2012
20100072824Modular multi-pulse transformer rectifier for use in asymmetric multi-level power converter - In one embodiment, the present invention includes a system having multiple modular transformers each including a phase-shifted primary winding coupled to an input power source and phase-shifted secondary windings each coupled to a power cell. The system further includes different phase output lines coupled to a load. These lines may include first, second and third phase output lines.03-25-2010
20120242156DC/DC CONVERTER CIRCUIT AND BATTERY SYSTEM - A DC/DC converter circuit includes at least two DC/DC converters and a low-pass filter, the DC/DC converters in each case having one input side and one output side. The DC/DC converters are connected to each other in series on their output side, and the low-pass filter is post-connected to the DC/DC converters that are connected in series to each other, so as to smooth the output voltage generated by the DC/DC converters at their output side.09-27-2012
20120200164Power Conversion Apparatus and Electric Vehicle - A power conversion apparatus capable of improving the impedance characteristics between each of two power modules and each of a plurality of capacitor cells, the power conversion apparatus including: plural capacitor cells connected in parallel between a three-layer laminated wiring board consisting of a positive polarity conductor board and a negative polarity conductor board formed widely in the direction of the parallel disposition of the power modules and laminated with an insulation sheet therebetween; a three-layer laminated conductor board consisting of a positive polarity conductor board and a negative polarity conductor board formed widely in the direction of the parallel direction of the power modules and laminated with an insulation sheet therebetween and used to connect the positive and negative polarity sides of each of the two power modules to the laminated wiring board respectively.08-09-2012
20110018353Method and apparatus for multi-source electrical energy grid-tied transformation - A method and apparatuses transform the electrical energy from multiple sources to grid compliant AC voltage. The apparatus according to one embodiment comprises: multiple energy sources (GES 01-27-2011
20100295377POWER GENERATOR DISTRIBUTED INVERTER - A power generator configuration having a distributed inverter. A system is described that includes a plurality of solar modules coupled together in series to form a string; a plurality of combiner boxes, wherein each combiner box couples together a plurality of strings in parallel; and a plurality of DC-DC converters, wherein each DC-DC converter increases a direct current (DC) voltage output of an associated combiner box. Also provided are distributed maximum power point tracker (MPPT) controls that adjust for changing conditions at individual sets of strings.11-25-2010
20100283325Delivery of Electric Power by Means of a Plurality of Parallel Inverters and Control Method Based on Maximum Power Point Tracking - The system provides for one or more photovoltaic panels (11-11-2010
20100301676SOLAR POWER GENERATION SYSTEM INCLUDING WEATHERABLE UNITS INCLUDING PHOTOVOLTAIC MODULES AND ISOLATED POWER CONVERTERS - A power generation system including a plurality of isolated power converters and a plurality of first weatherable units is provided. Each of the isolated power converters includes a primary stage, a secondary stage and a transformer providing an electrically contactless connection between the primary and secondary stages. The first weatherable unit includes a photovoltaic module coupled to the primary stage of a respective one of the plurality of isolated power converters and a primary side of the transformer. The system further includes a plurality of second units, each having a second side of the transformer coupled to the secondary stage of a respective one of the plurality of isolated power converters. The system also includes a direct current (DC) to alternating current (AC) inverter and a connection unit for coupling the secondary stages of the isolated power converter and the DC to AC inverter. The DC to AC inverter is configured to transfer power from the photovoltaic module to a power grid.12-02-2010
20100213767Converter channelized uniform power distribution system - A channelized uniform distribution power system controls individual channels of power converters with each channel of power converters having uniform output power as the channels are controlled by voltage control signals from respective controllers that are interconnected by a shared current signal and a shared voltage signal for controlling the channels to provide uniform power, with conventional current limiting and voltage regulation functions. Each channel may have a number of converters being parallel-input parallel-output connected converters, series input parallel-output connected converters, and parallel-input series output connected converters.08-26-2010
20100213769POWER CONVERTING APPARATUS - A power converting apparatus generates a carrier having a waveform in which an absolute value of a slope is constant with respect to time, based on a value for internally dividing amplitude of the waveform into first and second values. Commutation of a converter is performed when the carrier takes a reference. Adoption is allowed of a zero voltage vector as a switching mode of an inverter in a period in which the carrier takes a first command value to a second command value. A value for internally dividing a value from the reference to a maximum value of the carrier at a ratio between a third value and a fourth value is the first command value. A value for internally dividing a value from a minimum value of the carrier to the reference at a ratio between the third value and the fourth value is the second command value.08-26-2010
20100213768Apparatus for photovoltaic power generation - An apparatus for photovoltaic power generation. The apparatus utilizes a two stage electrical power converter comprising a first converter stage for converting DC power produced by the one or more sources to converted DC power, and a second converter stage for inverting the DC power output of the first inverter stage to AC power. The first converter stage is adapted to function as a current source for sourcing current to the second converter stage to the extent of having an output impedance of at least 240 kOhms.08-26-2010
20100253150AC Power Systems for Renewable Electrical Energy - Renewable electrical energy is provided with aspects and circuitry that can harvest maximum power from an alternative electrical energy source (10-07-2010
20100133911Solar power array with maximized panel power extraction - A solar power array includes solar power panels, where each solar panel provides output current and voltage, separate DC-DC converters, where each solar panel is connected to a unique DC-DC converter, where each DC-DC converter is designed to maximize the power from each solar panel, and where each DC-DC converter produces a high voltage output, a high voltage DC bus coupled to the DC-DC converters that receives the high voltage output, and a DC-AC inverter that inverts the high voltage DC on the high voltage DC bus to an AC power signal for distribution to one or more AC loads.06-03-2010
20100194202System and method for integrated solar power generator with micro inverters - Apparatuses, methods, and systems directed to an integrated solar electric power generation system. Some embodiments of the present invention comprise one or more integrated photovoltaic solar panels each incorporating one or more solar modules which convert Sun light energy to DC electric power and one or more micro inverters which convert DC power received from the solar modules to produce AC power. The integrated solar panel provides connections that can be easily connected to additional integrated photovoltaic solar panels. Other embodiments of the present invention can be used to connect multiple integrated solar panels through an AC bus to which an AC load center is connected and provides power to the application electrical power loads and/or a utility grid. Yet other embodiments of the present invention comprise one or more integrated solar panels that are connected through one or more local AC buses. The local AC buses are then connected through a main bus to an AC load center that provides power to the application electrical power loads and/or a utility grid.08-05-2010
20100194203HIGH TORQUE STARTER/GENERATOR WITH LOW INPUT VOLTAGE - An apparatus includes a plurality of starter/generator subsystems connected in parallel to a voltage distribution bus and to an input power supply. Each of the subsystems includes a starter/generator unit (SGU) for providing torque for starting an engine when the apparatus is operated in an engine start mode, and for generating power when the apparatus is operated in a generator mode. In an embodiment, each subsystem includes a power conversion unit (PCU) connected to the respective SGU, and each PCU includes an inverter section for rectifying voltage generated by the SGU when the apparatus is operated in the generator mode and may provide AC excitation voltage to operate the SGU as a motor to support the engine start mode.08-05-2010
20100019580DETACHABLE INVERTER FOR A SOLAR MODULE - Provided are novel detachable inverters, DC/DC converters, diodes and other detachable electrical circuitry components for solar modules. A detachable inverter or other component according to certain embodiments includes a fixed part and a separable part, i.e., an insert. The insert may include one or more bypass diodes, inverters, DC/DC converters or combinations thereof. According to various embodiments, the insert may or may not be movable between operating positions or orientations associated with different electrical connection configurations.01-28-2010
20100019579VERSATILE AND INTELLIGENT POWER CONTROLLER - The invention provides a monolithic, highly integrated power supply circuit capable of providing various voltages for circuits on an expansion card, either from a main supply source or an auxiliary supply source. The monolithic power supply circuit preferably includes two switching converters, two low-drop-out regulators, a standby regulator, a reset circuit, and a control circuit. An associated method for providing various voltages via a monolithic power supply circuit is also disclosed.01-28-2010
20090174262POWER SUPPLY AND CONTROLLER CIRCUITS - A power supply system includes multiple power converter phases. A controller (e.g., a processor device) monitors energy delivery for each of multiple power converter phases that supply energy to a load. The controller analyzes the energy delivery associated with each of the multiple power converter phases to identify an imbalance of energy delivered by the multiple power converter phases to the load. Based on the analyzing and detection of an imbalance condition, the controller modifies a future order of activating the multiple power converter phases for powering the load. Accordingly, a single phase of a multiphase switching power converter may be prevented from becoming overloaded while delivering energy to power the load.07-09-2009
20110148213380 VOLT DIRECT CURRENT POWER DISTRIBUTION SYSTEM FOR INFORMATION AND COMMUNICATION TECHNOLOGY SYSTEMS AND FACILITIES - A method and a modular direct current power distribution system. A distribution panel may receive alternating current power with a voltage range between 200 volts and 15000 volts. A modular rectifier may convert the alternating current power from the distribution panel to direct current power with a range of 250 volts to 600 volts. An end feed box may receive alternative energy power from an alternative energy power source. A power pathway module may distribute the direct current power from the modular rectifier to a set of information and communication technology equipment. An electrical protection system may guard against electrical damage.06-23-2011
20100026100Multile Input Channel Power Control Circuit - The disclosed apparatus and systems are adapted to implement dynamic power control in order to condition and store, and/or immediately utilize, energy from one or more available power inputs, whether the inputs are constantly, regularly, or intermittently available, singly or in various combinations. Power control circuits according to the invention provide means for dynamically responding to input availability and output requirements in order to prioritize input energy selection, input signal conditioning, and output power delivery adapted to the application and operating environment.02-04-2010
20110304215System for Use of Static Inverters in Variable Energy Generation Environments - A system to collect energy from generation systems such as, for example, wind farms or solar farms with widely distributed energy-generation equipment. In some cases, static inverters are used to feed the energy directly into the power grid. In some other cases, back-to-back static inverters are used create a high-voltage DC transmission line to collect power from multiple generation sites into one feed-in site.12-15-2011
20110304214Switching Configuration and Method for the Production of an Alternating Voltage from at Least Supply Terminals with Temporally Variable Output DC Voltage - A circuit having a plurality of parallel-connected partial circuits for feeding an inverter circuit. A partial circuit comprises an unregulated voltage source with a temporally variable output DC voltage and a synchronous converter having an automatically functioning regulating circuit. The circuit is triggered according to two modes of operation. The first mode of operation is as an upward converter, when the value of the output voltage of the unregulated voltage source exceeds a threshold value, and thus the inverter circuit is supplied with the requisite input voltage. The second mode of operation is as a downward converter, when the value of an output voltage of the unregulated voltage source is below a threshold value, or when there is no output voltage from the unregulated voltage source, in which case a first capacitor is charged from the DC voltage applied to the second terminals.12-15-2011
20120306277WIND TURBINE CONTROLLER APPLYING DIFFERENTIAL POLE CONTROL ALGORITHM - The present invention relates to a control system and an associated method for controlling an amount of reactive power delivered from a wind power plant to an associated power supply grid, the control system comprising a wind power plant controller and a number of wind turbine controllers each being in communication with said wind power plant controller, wherein the wind power plant controller is adapted to provide a grid voltage reference in response to a required total amount of reactive power to at least one wind turbine controller, said wind turbine controller comprising a voltage control loop comprising means for cancellation of a steady-state local voltage error.12-06-2012
20120306278Voltage Regulation Of A DC/DC Converter - Power system includes at least one power source and a DC/DC converter with an input coupled to the power source, and an output coupled to a load, for allowing power transfer from the power source to the load, the DC/DC converter including means for regulating an input voltage of the DC/DC converter.12-06-2012
20090261659SYSTEMS AND METHODS FOR POWER SUPPLY SYNCHRONIZATION IN RADIO FREQUENCY IDENTIFICATION (RFID) READERS - A system for power supply synchronization in an Radio Frequency Identification (RFID) reader is shown and described. In one embodiment, the system includes one or more switched mode power supply devices and a signal generator. Each of the switched mode power supply devices provides power to at least one component of the RFID reader. The signal generator transmits a synchronization signal of a controlling frequency to each of the one or more power supply devices. In one embodiment, the system includes a signal processing unit that is configured to reject one or more spectral components from the output of the RFID reader.10-22-2009
20120038217CONTROLLER APPARATUS WITH MAXIMUM POWER POINT TRACKING FOR CONTROLLING AN ELECTRIC POWER GENERATION SYSTEM BASED ON PHOTOVOLTAIC SOURCES, CONTROLLING METHOD AND RELATED ELECTRIC POWER GENERATION SYSTEM - Controller apparatus with MPPT tracking for controlling an electric power generation system comprising two identical sub-sections of a photovoltaic field, connected to two respective identical switching power converters, the two converters being controlled by two respective periodic controlling signals and the outputs of the two converters being connected in parallel. The controller apparatus comprises a first and a second current sensor for detecting the output currents of the two converters, a subtractor capable to receive the two current detection signals and to generate a difference signal, an amplifier capable to amplify the difference signal by a constant gain k, and a low-pass filter capable to filter the amplified difference signal, a proportional-integral controller for controlling the filtered amplified difference signal.02-16-2012
20120043823Switching Circuits For Extracting Power From An Electric Power Source And Associated Methods - A switching circuit for extracting power from an electric power source includes (02-23-2012
20110316346Methods and Apparatus for Adaptive Operation of Solar Power Systems - Methods and apparatus may provide for the adaptive operation of a solar power system (12-29-2011
20110101786Method and apparatus for anti-islanding of distributed power generation systems - A method and apparatus for identifying an islanding condition. In one embodiment, the method comprises altering a phase error response within a phase locked loop (PLL), and determining whether the islanding condition exists based on the altered phase error response.05-05-2011
20120001491Device and Method for Generating Alternating Current - A solar power plant includes at least one photovoltaic module for generating power to be fed in a multi-phase grid. At least one inverter is provided for converting a direct voltage generated by the at least one photovoltaic module into an alternating mains voltage. A mains transformer is coupled to receive the alternating mains voltage from the inverter. The inverter is coupled to a primary side of the mains transformer. A direct voltage source coupled between an output of the at least one inverter and an input of the mains transformer such that a potential of the at least one photovoltaic module is displaced and that a bias voltage is set which is different from zero volts.01-05-2012
20110049994WIND FARM HAVING A PLURALITY OF WIND ENERGY INSTALLATIONS - The invention relates to a wind power plant (03-03-2011
20120007434THREE-DIMENSIONAL PHOTOVOLTAIC APPARATUS AND METHOD - Three-dimensional photovoltaic devices and power conversion structures associated therewith are provided.01-12-2012
20120007433Dual-Source Converter - Disclosed is a dual-source converter for a hybrid power supply. The converter includes a first power circuit, a second power circuit, an auxiliary circuit, an output circuit and a closed loop circuit. The first power circuit is electrically connected to the second power circuit in series for receiving two varied voltage sources. The auxiliary circuit is configured to achieve soft switching of all switches. The closed loop circuit is configured to control the duty cycles of the first power circuit, the second power circuit and the auxiliary circuit so as to improve the efficiency of the dual-source converter.01-12-2012
20120007431POWER SUPPLY HAVING CONVERTERS WITH SERIALLY CONNECTED INPUTS AND PARALLEL CONNECTED OUTPUTS - A power supply is coupled to an input voltage source. The power supply includes a plurality of converters. Each converter has an input for receiving an input voltage and an output for providing an output voltage. The inputs are connected in series and the outputs are connected in parallel to provide an output voltage. The power supply further includes an output regulating controller coupled to one of the plurality of converters for regulating the output voltage. The power supply further includes one or more input regulating controllers correspondingly coupled to the remaining one or more converters of the plurality of converters for regulating one or more input voltages.01-12-2012
20120056483POWER CONVERTER FOR A SOLAR PANEL - A solar array power generation system includes a solar array electrically connected to a control system. The solar array has a plurality of solar modules, each module having at least one DC/DC converter for converting the raw panel output to an optimized high voltage, low current output. In a further embodiment, each DC/DC converter requires a signal to enable power output of the solar modules.03-08-2012
20120007432WEARABLE POWER MANAGEMENT SYSTEM - The present disclosure sets forth a power management system including a plurality of power management devices configured to transfer power among a plurality of external devices. The power management system includes a first power management device and a second power management device. The first power management device includes a first, second and third communication ports along with first, second and third power ports. The second power management device includes fourth, fifth and sixth communications port along with fourth, fifth and sixth power ports. The first power port of the first power management device is coupled to the fourth power port of the second power management device such that first and second power and the first communications port of the first power management device is coupled to the fourth communications port of the second power management device.01-12-2012
20120153729MULTI-INPUT BIDIRECTIONAL DC-DC CONVERTER - Provided is technology for charge and discharge control of a plurality of energy storage modules having different properties. For achieving the technology, there is provided a multi-input bidirectional DC-DC converter including: a first bidirectional DC-DC converter including a first input unit which stores an input current from a first energy storage module, a primary-side first half-bridge which is connected to the first input unit and controls an input current from the first energy storage module, an output unit which includes an output capacitor, a secondary-side half-bridge which is connected to the output unit and controls the output voltage, and a first transformer whose primary side is connected to the primary-side first half-bridge, whose secondary side is connected to the secondary-side first half-bridge, and which transforms a voltage at the primary side or at the secondary side according to a power mode; and a n-th bidirectional DC-DC converter.06-21-2012
20120013196Fuel cell system and power managing method of the same - A fuel cell system, which provides output power of at least one of a fuel cell and a battery to a load, selects any one operating mode from among various operating modes of the fuel cell system based on a change in performance of the battery due to use of the battery, and controls supplying of output power of the fuel cell and output power of the battery to the load according to the selected operating mode.01-19-2012
20120013195POWER SUPPLY SYSTEM AND CONTAINER DATA CENTER INCLUDING SAME - A power supply system includes a number of aerogenerators, a number of rectifiers, and a direct current to direct current (DC/DC) converter. A first terminal of each rectifier is connected to a corresponding one of the aerogenerators. A first terminal of the DC/DC converter is connected to second terminals of the rectifiers. A second terminal of the DC/DC converter is connected to a power unit of a container data center. Each rectifier converts the alternating current (AC) generated by the corresponding aerogenerator to a pulsating direct current (DC). The DC/DC converter converts the pulsating DC to a constant voltage DC and supplies power to the power unit.01-19-2012
20120205985POWER DISTRIBUTION DEVICE AND POWER DISTRIBUTION SYSTEM USING SAME - A power distribution device includes a direct current power source DC/DC converter connected to a direct current power source, and an AC/DC converter connected to an alternating current power source. The direct current power source DC/DC converter and the AC/DC converter are accommodated in a single container from which a DC load supply line is led out.08-16-2012
20120104864AC Power Systems for Renewable Electrical Energy - A renewable electrical energy power system is provided with aspects and circuitry that can optimize operation of a DC-AC inverter. Alternative electrical energy sources may include solar cells and solar panels. In various embodiments, the system may include solar panel maximum power point independent inverter input optimization photovoltaic power control circuitry, inverter efficiency optimized converter control circuitry, inverter voltage input set point converter output voltage control circuitry, inverter sweet spot converter control circuitry, photovoltaic inverter duty cycle switch control circuitry, substantially power isomorphic photovoltaic inverter input control circuitry, and substantially power isomorphic photovoltaic inverter duty cycle control circuitry. With previously explained converters, inverter control circuitry or photovoltaic power converter functionality control circuitry configured as inverter sweet spot converter control circuitry can achieve extraordinary efficiencies with substantially power isomorphic photovoltaic capability at 99.2% efficiency or even only wire transmission losses.05-03-2012
20120062038DEVICE AND METHOD FOR EQUALIZING VOLTAGES OF ENERGY-STORAGE ELEMENTS03-15-2012
20110084556SYSTEM AND APPARATUS FOR INTERCONNECTING AN ARRAY OF POWER GENERATING ASSEMBLIES - A system and apparatus for interconnecting an array of power generating assemblies includes a cable assembly having a plurality of continuous conductors and a plurality of cable connectors electrically coupled to the continuous conductors. The continuous conductors are configured to receive inverter AC power generated by inverters and deliver the combined AC power to an AC grid or other power sink. The cable connectors are configured to mate with corresponding connectors of the inventers to deliver the AC power to the continuous conductors.04-14-2011
20110068634DIRECT CURRENT POWER SUPPLY FOR MISSION CRITICAL APPLICATIONS - A DC power supply apparatus and method of supplying DC power for mission critical applications utilizes multiple power circuits in one unit, the power circuits being optimizable for efficiency as the load increases or decreases. The individual power supplies may use a multiphase topology within the power circuits, with logic phase shifts between multiphase, and two types of power management circuits arranged in parallel, or an equivalent controller, for implementing: (a) a variable linear or variable exponential precision droop algorithm, and (b) a “virtual bus” or current averaging/active current sharing circuit, the current sharing being provided by a low bandwidth communications link between droop controllers in each of the power circuits. In addition, the droop/paralleling circuitry and/or programmed components may be arranged to implement two types of arc detection and suppression, including: (a) unequal positive and negative current in each power circuit to shut down the output power, and (b) monitoring output current for an arc “signature” to protect against arcs between positive and negative.03-24-2011
20120153730INTERLEAVED LLC CONVERTER EMPLOYING ACTIVE BALANCING - An interleaved LLC converter, a method of operating an LLC converter and a power supply are disclosed herein. In one embodiment, the LLC converter includes: (1) a plurality of LLC power channels, with each of the plurality having an independent power input and (2) a compensation controller configured to actively adjust the independent power inputs to substantially match output voltage and current levels for a given load condition and a common operating frequency of the plurality of LLC power channels.06-21-2012
20110089766Apparatus for phase rotation for a three-phase AC circuit - An apparatus for power conversion. In one embodiment, the apparatus comprises a plurality of AC power sources, wherein each AC power source in the plurality of AC power sources has a phase rotation circuit coupled to a DC/AC inverter for converting DC input power to AC output power, wherein (i) a first phase rotation circuit has first three phase output terminals coupled to second three phase input terminals of a second phase rotation circuit; (ii) the second phase rotation circuit has second three phase output terminals coupled to third three phase input terminals of a third phase rotation circuit; and (iii) the third phase rotation circuit has third three phase output terminals coupled to either fourth three phase input terminals of a fourth phase rotation circuit or to a commercial power grid.04-21-2011
20110089765POWER CONVERTING APPARATUS - A power converting apparatus includes a first inverter circuit including a high-voltage first DC voltage source and operated at a low frequency using Si IGBTs having a high withstand voltage exceeding 1000 V and a second inverter circuit including a low-voltage capacitor operated by high-frequency PWM using SiC MOSFETs having a low withstand voltage, wherein an AC side of the first inverter circuit is connected in series to an AC side of the second inverter circuit. The power converting apparatus outputs AC power having a prescribed voltage waveform obtained from the sum of voltages generated by the first and second inverter circuits.04-21-2011
20120181873Hybrid Battery System - An energy transformer for a battery system is disclosed. The energy transformer includes a plurality of DC/DC converters each having a first and a second input and a first and a second output. The first output of a first of the DC/DC converters is connected to a first output of the energy transformer and the second output of a last of the DC/DC converters is connected to a second output of the energy transformer. The first and second inputs are designed for connecting a battery module. The DC/DC converters are connected in series on the output side. The energy transformer has a plurality of first diodes each of which have an anode connected to the first input of one of the DC/DC converters and a cathode connected to the second input of another DC/DC converter so that the DC/DC converters are connected in series on the input side and via a second diode having an anode connected to the first input of the first of the DC/DC converters and a cathode connected to the first output of the energy transformer.—07-19-2012
20120313443SMART AND SCALABLE OFF-GRID MINI-INVERTERS - A method and apparatus is disclosed for intelligently inverting DC power from DC sources such as photovoltaic (PV) solar modules to single-phase or three-phase AC power to supply power for off-grid applications. A number of regular or redundant off-grid Mini-Inverters with one, two, three, or multiple input channels in a mixed variety can easily connect to one, two, three, or multiple DC power sources such as solar PV modules, invert the DC power to AC power, and daisy chain together to generate and supply AC power to electrical devices that are not connected to the power grid including motors, pumps, fans, lights, appliances, and homes.12-13-2012
20120119586Reconfigurable Microgrid Direct Current Interface - Technologies are described herein for synchronizing multiple direct current (“DC”) voltages provided by multiple power sources. Multiple input voltages are received from multiple power sources. A voltage control signal indicating a desired output voltage is issued to multiple DC-DC converter modules electrically coupled to the multiple power sources. A master DC-DC converter module from the multiple DC-DC converter modules converts a master input voltage to a master output voltage that is substantially equal to the desired output voltage. The master output voltage is then provided to the remaining multiple DC-DC converter modules. Each of the remaining multiple DC-DC converter modules then converts a slave input voltage to a slave output voltage that is substantially equal to the master output voltage.05-17-2012
20110127841Smart virtual low voltage photovoltaic module and photovoltaic power system employing the same - A smart virtual low voltage photovoltaic (PV) module is disclosed, including a PV module having one or more photovoltaic cells, configured to convert solar energy into DC power, and a DC/DC converting unit, coupled between the PV module and a control center coupled to the smart virtual low voltage PV module, configured to acquire from the control center a level value determined by the control center, so as to convert the DC power received from the PV module into a demanded output voltage having the level value.06-02-2011
20120161528Solar Photovoltaic Systems - Improved techniques for photovoltaic power generation are described. Inverter failure is can be a significant problem in solar photovoltaic systems as it can lead to loss of opportunity to harvest energy. A solar photovoltaic (PV) power generation system is described comprising solar PV panels and power conditioning units. A dc power distribution bus is coupled to the solar PV panels and the power conditioning units to switchably share dc power from the solar PV panels between the power conditioning units. Power distribution controllers detect a faulty power conditioning unit and reroute power from a solar PV panel coupled to the faulty power conditioning unit to other power conditioning units via the dc distribution bus.06-28-2012
20120248880System For The Electronic Management Of Photovoltaic Cells As A Function Of Meteorology - The invention relates to a system for the electronic management of a photovoltaic generator, said system comprising a plurality of n static converters (10-04-2012
20120126627SOLAR ARRAY REGULATOR BASED ON STEP-UP AND DOWN CONVERSION AND SOLAR POWER SYSTEM COMPRISING THE SAME - A solar array system includes at least one solar array and at least one solar array regulator. The solar array regulator has an input port to be connected to the solar array, and an output port to be connected to a power bus. The solar array comprises a switching voltage converter comprising a step-down (PC05-24-2012
20100207455Thin-film photovoltaic power element with integrated low-profile high-efficiency DC-DC converter - A photovoltaic device includes at least one photovoltaic cell and a DC/DC converter electrically coupled to the at least one photovoltaic cell. The at least one photovoltaic cell and the DC/DC converter are integrated into a photovoltaic package.08-19-2010
20120133211Control Methods for the Synchronization and Phase Shift of the Pulse Width Modulation (PWM) Strategy of Power Converters - A method of controlling a plurality of power converters 05-31-2012
20120212066Safety Mechanisms, Wake Up and Shutdown Methods in Distributed Power Installations - A distributed power system including multiple DC power sources and multiple power modules. The power modules include inputs coupled respectively to the DC power sources and outputs coupled in series to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the serial string to output power. A signaling mechanism between the inverter and the power module is adapted for controlling operation of the power modules.08-23-2012
20120212065SCALABLE AND REDUNDANT MINI-INVERTERS - The Scalable and Redundant Mini-inverters as described in this invention include double, triple, or quadruple redundant capabilities so that the Mini-inverters can work in a harsh environment for a prolonged period of time. A number of regular, redundant, triple redundant, or quadruple redundant Mini-inverters with one, two, three, or multiple input channels in a mixed variety can easily connect to one, two, three, or multiple DC power sources such as solar PV modules, invert the DC power to AC power, and daisy chain together to generate AC power to the power grid.08-23-2012
20120212064Methods and Devices for Controlling a Photovoltaic Panel in a Three Phase Power Generation System - Methods, apparatus and systems for controlling a photovoltaic panel, to output three-phase power while ensuring the power source operates safely include determining a temperature of the photovoltaic panel, determining a voltage provided from the photovoltaic panel, determining a parameter based on the voltage and the temperature and controlling a DC to three-phase power converter based on the determined parameter. The three-phase power converter may be a pulse amplitude modulated current converter (PAMCC), configured to output first, second and third pulse amplitude modulated current pulse from three terminals controlled in timing and phase so that when respective outputs of multiple PAMCCs are connected, each phase of the plurality of PAMCCs is demodulated to produce a three-phase alternating current output. The PAMCC may be controlled through tables of pulse durations based on the determined parameter. The voltage output may be controlled through a fast control loop and through a slower control loop.08-23-2012
20120313442SOLAR POWER CONVERSION APPARATUS - Provided is a solar power conversion apparatus which includes at least one solar array receiving light and generating a DC power, a converter unit converting amplitude of the generated DC power, a multilevel inverter unit receiving the DC power from the converter unit to output AC power with multi levels and comprising a plurality of multilevel inverters, an AC filter insulating the inverter unit from a power grid, and a control unit applying a control signal to the converter unit and the multilevel inverter.12-13-2012
20120175962Power Collection and Transmission Systems - A power collection and transmission system can be used with a plurality of energy devices such as off-shore wind turbines. The energy devices are grouped into two or more clusters. The system includes a dc collection network for each cluster. A primary DC/DC converter is located at each energy device and is connected to the dc collection network. First and second dc transmission lines are used to transmit any power generated by the energy devices to an on-shore converter station. A secondary DC/DC converter assembly is connected between the dc collection networks and the first and second dc transmission lines.07-12-2012
20120175963Distributed Power Harvesting Systems Using DC Power Sources - A system and method for combining power from DC power sources. Each power source is coupled to a converter. Each converter converts input power to output power by monitoring and maintaining the input power at a maximum power point. Substantially all input power is converted to the output power, and the controlling is performed by allowing output voltage of the converter to vary. The converters are coupled in series. An inverter is connected in parallel with the series connection of the converters and inverts a DC input to the inverter from the converters into an AC output. The inverter maintains the voltage at the inverter input at a desirable voltage by varying the amount of the series current drawn from the converters. The series current and the output power of the converters, determine the output voltage at each converter.07-12-2012
20120187769Energy Supply System - An energy supply system has a number of DC choppers for converting the input voltages applied in each case into output voltages, and a number of energy storages for providing the input voltages, an energy storage being assigned to each DC chopper. An output voltage of at least one of the number of DC choppers is settable as a function of a setpoint input in order to expose the energy storage assigned to the at least one DC chopper to a load individually.07-26-2012
20120187767POWER GENERATION SYSTEM, POWER GENERATING MODULE, MODULE FIXING DEVICE AND METHOD FOR INSTALLING POWER GENERATION SYSTEM - A power generation system includes power generating modules, and a module fixing device configured to fix the power generating modules. Each power generating module includes a power generating module body including a power generator that generates DC energy, and a power transmitter attached to the power generating module body. The power transmitter includes an oscillator that converts the DC energy into RF energy with a frequency f07-26-2012
20120187766Device and Method For Improving The Performance Of An Inverter In A Photovoltaic System - In one embodiment, a photovoltaic (PV) power generation system includes a plurality of PV arrays configured to convert received light into electricity, a double conversion device, wherein the double conversion device is coupled to the plurality of PV arrays, and an inverter, wherein the inverter is coupled to the double conversion device. In an exemplary embodiment, the double conversion device is a DC-DC converter.07-26-2012
20100327659SYSTEM AND METHOD FOR OVER-VOLTAGE PROTECTION OF A PHOTOVOLTAIC SYSTEM WITH DISTRIBUTED MAXIMUM POWER POINT TRACKING - A solar panel array for use in a solar cell power system is provided. The solar panel array includes a string of solar panels and multiple voltage converters. Each voltage converter is coupled to a corresponding solar panel in the string of solar panels. The solar panel array also includes multiple maximum power point tracking (MPPT) controllers. Each MPPT controller is coupled to a corresponding solar panel in the string of solar panels. Each MPPT controller is configured to sense an instantaneous power unbalance between the corresponding solar panel and an inverter.12-30-2010
20120299386DC MICROGRID FOR INTERCONNECTING DISTRIBUTED ELECTRICITY GENERATION, LOADS, AND STORAGE - A device includes an energy unit coupled to an energy device and adapted to couple a pair of split DC rails. A controller senses the voltage on the DC rails and regulates its output current response by means of an autonomous current response that creates the aggregate effect of controlling the rail voltage in cooperation with other units coupled to the DC rails. A system includes multiple such devices coupled to split DC rails.11-29-2012
20120319495Power Inverter with Multi-Fed On-Board Power Supply - An inverter includes a DC/AC converter connectable to a DC power grid, at least one DC/DC converter arranged upstream of the DC/AC converter and providing a galvanic isolation, and a DC voltage link at the input of the at least one DC/DC converter and connectable to at least one DC power source. The inverter also includes at least one further DC voltage link which is galvanically isolated from the first DC voltage link by the DC/DC converter, on-board voltage rails supplying a controller and other auxiliary devices of the inverter with electric energy; and an on-board supply unit. The on-board supply unit is configured and adapted to feed the electric energy into the on-board voltage rails both out of the first DC voltage link and out of the at least one further DC voltage link.12-20-2012
20120080955High Voltage Energy Harvesting and Conversion Renewable Energy Utility Size Electric Power Systems and Visual Monitoring and Control Systems for Said Systems - A renewable energy, utility size electric power system is provided with a high voltage, renewable energy harvesting network connected by a direct current link to a centralized grid synchronized multiphase regulated current source inverter system. The harvesting network includes distributed renewable energy power optimizers and transmitters that control delivery of renewable energy to the grid synchronized multiphase regulated current source inverter system. A visual immersion monitoring and control system can be provided for a three-dimensional, visually-oriented, virtual reality display, command and control environment.04-05-2012
20120319494SECURE CONTROL MECHANISM FOR DISTRIBUTED PHOTOVOLTAIC SYSTEM - A system for controlling photovoltaic electricity production equipment comprising photovoltaic modules each equipped with a DC/DC microconverter connected to a DC bus, a DC bus manager, and an inverter for converting the direct current from the photovoltaic panels into alternative current intended for an electrical distribution network. Power is injected into the DC bus when the voltage of the DC bus is less than a minimum voltage until the said minimum voltage is reached. Each of the microconverters injects a maximum power from the photovoltaic modules into the DC bus when the voltage of the DC bus is between a first voltage and a second voltage. The injecting of power from the photovoltaic modules into the DC bus is stopped when the voltage of the DC bus is less than a low threshold voltage or greater than a high threshold voltage.12-20-2012
20120091817SYSTEM, METHOD, AND APPARATUS FOR AC GRID CONNECTION OF SERIES-CONNECTED INVERTERS - A system, method and apparatus are disclosed for converting DC power to AC power. The system includes a master controller that couples to a phase of a power distribution system and provides a synchronization signal, the phase of the power distribution system having a phase voltage. The system also includes a plurality of DC-to-AC series-connectable power converters, that receive and use the synchronization signal to convert a variable DC voltage from a corresponding one a plurality of photovoltaic panels to a variable AC voltage so that a plurality of corresponding variable AC voltages are generated by the plurality series-connectable power converters, and collectively the plurality of corresponding variable AC voltages add up the phase voltage, and each of the series-connectable power converters controls, responsive to the synchronization signal, the variable AC voltage so that the plurality of corresponding variable AC voltages are in phase.04-19-2012
20120139352ADVANCED RENEWABLE ENERGY HARVESTING - The power of DC electrical sources is combined onto a DC buss, such that each source behaves independently from any other source attached to the buss. In one embodiment, a converter module is attached to each of a plurality of solar photovoltaic panels and its output is attached in a parallel manner to a common buss that forms the input to a DC AC inverter. The converter module includes a Maximum Power Point Tracking component that matches the output impedance of the panels to the input impedance of the converter module. The converter also includes a communication component that provides parametric data and identification to a central inverter. Data generated by each converter module is transmitted over the power line or by wireless means and is collected at the inverter and forwarded to a data collection and reporting system.06-07-2012
20120139351SYSTEM AND METHOD FOR INTEGRATING WIND POWER GENERATION WITH WAVE POWER GENERATION - A system for integrating a wind power generation with a wave power generation includes a wind power generation device, a wave power generation device and a power integration device. The wind power generation device generates a first voltage. The wave power generation device generates a second voltage. The power integration device integrates the first voltage with the second voltage.06-07-2012
20120139350SYSTEM AND METHOD OF INTEGRATING WIND POWER AND TIDAL ENERGY - A system integrating a tidal power generation device and a wind power generation device and a method thereof are provided. The system includes a wind power generation device, a tidal power generation device and an integration device. The wind power generation device generates a first voltage, the tidal power generation device generates a second voltage, and the integration device integrates the first and the second voltages for a further use.06-07-2012
20130009486PHOTOVOLTAIC POWER GENERATION SYSTEM AND PHOTOVOLTAIC POWER GENERATION SYSTEM CONTROL METHOD - A photovoltaic power generation system, wherein electrical power generated by multiple photovoltaic power generator units is gathered in a single unit group power collection control section and, in addition, supplied (transferred) to a single power converter corresponding to a single unit group power collection control section. The photovoltaic power generation system comprises generator unit groups formed by arrangement of multiple photovoltaic power generator units and unit group power collection control sections, which are connected with the photovoltaic power generator units through unit cables, and collect and control the electric power generated by the photovoltaic power generator units.01-10-2013
20130169054Prefabricated Solar Array System - In one embodiment, a solar array system is described. The example solar array system is prefabricated as a single unit. The solar array system includes a plurality of solar panels. The solar panels of the plurality of solar panels are configured to be electrically connected to one another. At least one solar panel of the plurality of solar panels is electrically connected to a mini-inverter. The mini-inverter is configured to perform maximum power point tracking (MPPT) and apply a load to at least one solar panel of the plurality of solar panels. The mini-inverter is also configured to convert direct current (DC) power generated by the plurality of solar panels to alternating current (AC) power. The solar array system further includes a plurality of locking hinges. The locking hinges are configured to allow the plurality of solar panels to be folded on top of one another.07-04-2013
20130140903COMPACT DYNAMIC PHASE ANGLE REGULATORS - Compact dynamic Phase Angle Regulators (CD-PARs) are provided. A Compact Dynamic Phase Angle Regulator (CD-PAR) is a stand-alone device that regulates phase angle through a single transformer. A CD-PAR has no external energy source, uses low-rating devices, and can be isolated from a fault in the grid. A CD-PAR may be implemented in a single-phase or in a three-phase configuration, but the operation of a CD-PAR cross-couples all three phases. A CD-PAR controls both the real and the reactive power flow between two AC sources having the same frequency by inserting a voltage with controllable magnitude and phase. A CD-PAR may be implemented in either a buck configuration or a boost configuration.06-06-2013
20130093251REGULATOR DEVICE - A regulator device includes: a plurality of regulators that are equipped in parallel between a power input terminal and a power output terminal and converts a power inputted from the power input terminal to output to the power output terminal; a dummy load circuit that is coupled to a power output system different from a power output system to the respective power output terminal of the plurality of regulators; a selector that selects a regulator to carry out an output to the power output terminal and a regulator to carry out an output to the dummy load circuit among the plurality of regulators; and a controller that obtains conversion efficiency characteristic information representing a characteristic of power conversion efficiency relative to a current flowing in the dummy load circuit for the regulator to carry out an output to the dummy load circuit.04-18-2013
20130099580SOLAR POWER PLANT WITH INCREASED OPERATING LIFE - The invention relates to an arrangement having at least one electric potential-varying device for varying the electric potential of at least one electrical device with respect to earth potential, and a plant room facility. In the operating state, the electric potential-varying device is disposed in the plant room facility.04-25-2013
20130113294MODULAR ENERGY STORAGE SYSTEM - An energy storage system includes modular energy storage equipment that may be connected to an external system, such as a power grid. In at least one embodiment, the energy storage system includes a power transfer control system comprising a power transfer network and a processing module or controller. The power transfer network has a first interface coupleable to one or more energy storage units and a second interface coupleable to one or more power conversion units. One or more conductors in the power transfer network are selectively coupleable to the first interface and the second interface for transferring power between the energy storage units and the power conversion units based at least in part on information indicating a power or energy supply or demand of an external system or information indicating an amount of energy stored in the energy storage units. The energy storage system is scalable for different implementations.05-09-2013
20130113292POWER SUPPLY SYSTEM, IMAGE FORMING APPARATUS HAVING THE SAME, AND CONTROL METHOD OF THE SAME - A power supply system includes: a switching power supply configured to convert an AC voltage from an AC power supply into predetermined DC voltages, and outputs the DC voltages; a switch circuit provided on an AC input line, the switch circuit being configured to be switched on and off and supply AC power to the power supply when the switch circuit is turned on; a low-capacity power supply circuit connected. to the AC input line at a front stage of the switch circuit, the low-capacity power supply circuit being configured to supply electric power to the switch circuit if the power supply is active and supply predetermined electric power if the power supply is not used; and a control device configured to receive the predetermined electric power from the low-capacity power supply circuit. When the power supply is not used, the control device turns off the switch circuit.05-09-2013
20130099581Energy Storage System - An energy storage system comprises a plurality of storage mediums having substantially different energy and power density that are each connected to a DC bus via a respective bidirectional isolated DC-DC converter; and a controller configured to independently determine a current demand for each storage medium based on a control mode.04-25-2013
20130099579System and Method for Providing Active Power Balancing - According to one embodiment, a system for actively balancing power between several power units is disclosed. Each of the power units includes a corresponding group of cascoded energy cells. The system for actively balancing power comprises a group of buck/boost circuits used in each of the power units for maintaining an internal power balance among the corresponding group of cascoded energy cells, and an energy distribution circuit for responding to a respective energy need in each of the power units. The energy distribution circuit is configured to transfer energy between the power units to balance power among the power units according to their respective energy needs. In one embodiment, a method for actively balancing power between several power units comprises maintaining the internal power balance among the group of cascoded energy cells within each of the power units, and transferring energy between the power units as needed.04-25-2013
20130113293Direct Current to Alternating Current Conversion Utilizing Intermediate Phase Modulation - The systems, methods, and devices of the various embodiments provide a power converter that modulates the voltage to follow the envelope of the phase output such that the current may pass through to the line. The systems, methods, and devices of the various embodiments may provide a two phase power converter that modulates the voltage to follow the envelope of the two phase output. The systems, methods, and devices of the various embodiments may provide a three phase power converter that modulates the intermediate voltage to follow the envelope of the three phase output such that the current may pass through to the line without requiring intermediate storage.05-09-2013
20100277001Systems, Methods, and Apparatus for Converting DC Power to AC Power - Embodiments of the invention can provide systems, methods, and an apparatus for converting direct current (DC) power to alternating current (AC) power. According to one embodiment, a system for converting DC power to AC power can be provided. The system can include a DC power source electrically coupled to a DC-to-DC converter. The DC power source can be associated with a first ground, and the DC-to-DC converter can be operable to isolate the power provided by the DC power source from the first ground. The DC-to-DC converter can be further operable to condition the DC power and to provide the conditioned DC power to an inverter. The inverter can receive the conditioned DC power and can convert the conditioned DC power to AC power. The AC power can be associated with a second ground and can be provided to at least one load electrically coupled to the inverter.11-04-2010
20110273024SERIES CONNECTION OF ON-OFF CONTROLLERS FOR POWER TRANSMISSION IN BATTERY SYSTEMS - A power transmitter for a battery system, a battery system including such a power transmitter, and a motor vehicle including such a battery system are disclosed. The power transmitter includes a plurality of DC/DC converters, each of which has a first and a second input and a first and a second output. According to the invention, first and second inputs are designed to connect a battery module, while the DC/DC converters are connected in series at the output end.11-10-2011
20110210613POWER GENERATION FREQUENCY CONTROL - A solar power generation system includes a control system and a DC to AC converter coupled to a photovoltaic (PV) module and for supplying power to a power network. The control system includes a power point tracker to extract either maximum power available from the PV module or less than maximum power available from the PV module, a frequency monitor to obtain a network frequency from the power network, an internal reference frame element to provide an internal reference frequency of the solar power generation system, a frequency comparator to compare the network frequency and the internal reference frequency, and a command signal generator to use the frequency comparison to determine whether a transient increase or decrease in commanded output power is warranted and to provide a command signal.09-01-2011
20080197708SWITCHING CONTROLLER FOR POWER SHARING OF PARALLEL POWER SUPPLIES - A switching controller for power sharing of power supplies is disclosed. The switching controller includes an input circuit coupled to an input terminal to receive an input signal for generating a phase-shift signal, a first integration circuit coupled to the input circuit to generate a first integration signal in response to a pulse width of the input signal, and a control circuit coupled to the first integration circuit to generate a switching signal for switching the power supply, wherein the switching signal is enabled in response to the phase-shift signal, and a pulse width of the switching signal is determined in accordance with the first integration signal.08-21-2008
20130093250SYSTEM AND METHOD FOR OPERATING A POWER CONVERSION SYSTEM IN A CURTAILED MODE - A power management system comprising a processor is provided. The power management system obtains maximum operating capacities of the power converters over time while in the curtailed mode and uses at least some of the maximum operating capacities for determining and commanding an adjusted operating capacity of at least one of the power converters to maintain a substantially constant level of output power.04-18-2013
20100301677Photovoltaic Power Generation System and Photovoltaic Power Generation Device - It is an object to obtain a photovoltaic power generation system. A photovoltaic power generation system includes multiple solar cell modules each having a different band gap and step-up voltage transformers (boosters) that receive outputs from load resistors, the load resistors being controlled to maximize outputs of the respective solar cell modules. An output voltage of each step-up voltage transformer (booster) is controlled to be a predetermined output voltage (or output current), and the step-up voltage transformers (boosters) are connected in parallel (or in series) to obtain predetermined electric power.12-02-2010
20120274146ADVANCED CLOCK SYNCHRONIZATION CIRCUIT FOR SWITCH MODE POWER SUPPLIES - In a switch mode power supply, a circuit and method for switching between an internal clock and an external synchronization clock when a stable external clock has been detected, and for switching back to operating the power supply using said internal clock when a predetermined number of sequential external clock pulses exceed a predetermined switching period dropout threshold or are otherwise missing. In one embodiment, a power system comprises a plurality of power supplies connected in parallel to a common load and where each power supply is synchronized to the external clock when a stable external clock has been detected by each.11-01-2012
20120274145Circuit for Rendering Energy Storage Devices Parallelable - A circuit for rendering an energy storage device parallelable comprised of an energy storage device connected to a power adapter that converts the potential of the energy storage device into a potential that follows a predetermined function of the state of charge of the energy storage device. When multiple assemblies are paralleled, they may be charged and discharged as a whole with individual storage devices maintaining equal states of charge. The energy storage devices can be batteries with different cell counts, configurations, and energy discharge profiles. In some cases, the power adapters are comprised of DC to DC converters and system controllers that are used to translate each battery's energy discharge profile into a user-determined energy discharge profile that is a predictable function of the battery's state of charge and independent of temperature or other external conditions.11-01-2012
20110234008Method for Smoothing Alternating Electric Current From a Number of Power Generating Units and Wind Power Plant Including a Number of Wind Mills with Variable Rotational Speed - A method and a wind power plant are provided for smoothing alternating electric current from a number of power generators are provided. Generators are electrically connected to an electric network. Each power generator includes a transformer with pulse width modulation for converting direct current to pulse width modulated alternating current for feeding to the network. The time for feeding the pulses of the pulse width modulated alternating current is different for each generator in order to achieve a more even alternating current as a sum of respective outputs of alternating current from the generators.09-29-2011
20130181529Power Converter Circuit with AC Output - A power converter circuit includes output terminals configured to receive an external AC voltage. At least one series circuit has at least two converter units. Each converter unit includes input terminals configured to be coupled to a DC power source. Output terminals provide an AC output current. The at least one series circuit is connected between the output terminals of the power converter circuit. A voltage measurement circuit is connected between the output terminals of the power converter circuit and configured to provide at least one measurement signal that includes information related to phase and frequency of the external AC voltage. At least one of the converter units is configured to receive the at least one measurement signal and is configured to regulate the generation of the AC output current dependent on the at least one measurement signal.07-18-2013
20130181531Power Converter Circuit with AC Output - A power converter circuit includes output terminals configured to receive an external voltage. A series circuit with a number of converter units is connected between the output terminals of the power converter circuit. Each converter unit includes input terminals configured to be coupled to a DC power source and output terminals configured to provide an output current. At least one converter unit of the converter units includes a signal generator configured to receive a synchronization signal and to generate a continuous synchronization signal from the synchronization signal. The power converter circuit can be operated in a normal operation mode. In the normal operation mode, the at least one converter unit is configured to regulate generation of the output current such that a frequency and/or a phase of the output current are dependent on the continuous synchronization signal.07-18-2013
20130181533POWER CONVERTER FOR A SOLAR PANEL - A solar array power generation system includes a solar array electrically connected to a control system. The solar array has a plurality of solar modules, each module having at least one DC/DC converter for converting the raw panel output to an optimized high voltage, low current output. In a further embodiment, each DC/DC converter requires a signal to enable power output of the solar modules.07-18-2013
20130181530Power Converter Circuit with AC Output - A power converter circuit includes output terminals configured to receive an external voltage. A series circuit includes a number of converter units, each including input terminals configured to be coupled to a DC power source and output terminals configured to provide an output current. The series circuit is connected between the output terminals of the power converter circuit. A synchronization circuit is configured to generate a synchronization signal. The power converter circuit can be operated in a normal operation mode. In the normal operation mode, the synchronization circuit is configured to generate the synchronization signal dependent on the external voltage. In the normal operation mode, at least one converter unit of the plurality of converter units is configured to receive the synchronization signal and to regulate a generation of the output current such that a frequency and/or a phase of the output current is dependent on the synchronization signal.07-18-2013
20130181532HIGH-VOLTAGE POWER CONVERTER - The present invention relates to a high-voltage power converter comprising a number of controllable switching valves, each switching valve comprising a plurality of series connected switching units, the high-voltage power converter further comprising a resonance circuit comprising a link inductor and a link capacitor, and a plurality of clamping circuits connected in series, each clamping circuit comprising a clamping capacitor and a clamping switching unit.07-18-2013
20130187473Power Converter Circuit - A circuit arrangement includes a number of DC power sources. Each DC power source includes a rechargeable battery. The circuit arrangement also includes a number converter units. Each converter unit has input terminals and output terminals. The input terminals are coupled to one DC power source. The converter units form a series circuit between load terminals.07-25-2013
20120019074METHODS AND APPARATUS FOR HIGH-FREQUENCY ELECTRICAL POWER COLLECTION AND TRANSFER - Methods and apparatus for supplying power to an electrical line or grid by using high-frequency alternating current (HFAC) are provided herein. In some embodiments, an apparatus for collecting and transmitting electrical power to an AC line operating at a line frequency may include a plurality of high frequency AC power sources; a high frequency AC bus, connected to each of the high frequency AC sources; and a line frequency converter, the input of which is connected to the high frequency AC bus and the output of which is connectable to the AC line.01-26-2012
20120019073APPARATUS AND SYSTEM FOR POWER CONVERSION - An apparatus includes a DC-link, a voltage converter, a bus voltage controller, and a supervisory controller. The voltage converter is configured to convert a first DC voltage into a second DC voltage based on a command signal and based on an adjustment signal and to supply the second DC voltage to the DC-link. The bus voltage controller is configured to iterate calculation of the adjustment signal to communicate each iterated calculation of the adjustment signal to the voltage converter. The supervisory controller is configured to iterate calculation of the command signal and to communicate each iterated calculation of the command signal to the voltage converter and to the bus voltage controller. A frequency of the bus voltage controller to communicate each iterated calculation of the adjustment signal is higher than a frequency of the supervisory controller to communicate each iterated calculation of the command signal.01-26-2012
20130193766CONTROL AND PROTECTION OF A DC POWER GRID - A HVDC power grid including a multiplicity of voltage sourced converters arranged in a symmetrical monopole transmission configuration to transmit DC power over a DC power grid of transmission lines connected between the voltage sourced converters, and circuitry implemented for sensing and identifying a fault occurred on a section of a DC transmission line. In response to the sensing, the current on the faulted DC transmission line is controllably drawn down to a target current level, e.g., 50 amp, which will accommodate clearing of the faulted transmission line section by allowing switches located at each end of the faulted transmission line section to be able to open against such level of current without triggering an non-extinguishable or sustained arc across one of the switches. At least one of the switches is capable of opening when the current is reduced to the drawn down level to isolate the transmission line.08-01-2013
20120043822MODULAR ELECTRICAL ACCUMULATOR UNIT - A modular electrical accumulator unit includes multiple electrical accumulator unit modules, which are operated in conjunction with each other to form a single electrical accumulator unit.02-23-2012
20130200714MEDIUM VOLTAGE DC COLLECTION SYSTEM - A power generation system includes at least one generator having at least two sets of stator windings, an active rectifier comprising power cell based modular converters associated with each set of generator windings. Each set of windings is connected to an AC voltage side of the associated active rectifier, with each active rectifier having a positive DC voltage output and a negative DC voltage output. The DC voltage outputs of active rectifiers are connected to each other in series. A medium voltage DC (MVDC) collection network comprises positive pole cables and negative pole cables, wherein each positive pole cable is connected to the positive DC voltage output of a first active rectifier and each negative pole cable is connected to the negative DC voltage output of a last active rectifier. A substation receives the negative and positive pole cables of the MVDC collection network for further transformation and transmission.08-08-2013
20130200715CONVERTER ASSEMBLY AND A POWER PLANT INCLUDING THE CONVERTER ASSEMBLY - A converter assembly includes a DC-DC converter, an inverter, a DC link, an input capacitor, an inductor and a neutral conductor. The DC-DC converter includes at least one DC-DC converter unit. The input capacitor includes an input capacitor unit for each of the at least one DC-DC converter unit, where each of the input capacitor units has a midpoint. The neutral conductor is connected to a neutral point on an output side of the inverter. The inductor includes an inverter side inductor between each output terminal of the inverter means and the neutral point on output side of the inverter. The neutral conductor is connected to the midpoint of each of the input capacitor units.08-08-2013
20120086282Smart Cards - A smart card includes an internal voltage generator, a clock generator, and an internal circuit. The internal voltage generator generates a first internal voltage and a second internal voltage based on an input voltage received through an antenna. A level of the second internal voltage is lower than a level of the first internal voltage. The clock generator receives the first internal voltage and the second internal voltage to generate a clock signal. A frequency of the clock signal is changed according to the level of the first internal voltage. The internal circuit operates based on the clock signal and the second internal voltage.04-12-2012
20120086281WIRELESS POWER TRANSMISSION UNIT AND POWER GENERATOR WITH THE WIRELESS POWER TRANSMISSION UNIT - A wireless power transmission unit includes oscillators that convert DC energy into RF energy with a frequency f04-12-2012

Patent applications in class Plural converters