Entries |
Document | Title | Date |
20080281474 | System of Super Super Decoupled Loadflow Computation for Electrical Power System - A method of performing loadflow calculations for controlling voltages and power flow in a power network by reading on-line data of given/specified/scheduled/set network variables/parameters and using control means, so that no component of the power network is overloaded as well as there is no over/under voltage at any nodes in the network following a small or large disturbances. The invented generalized Super Super Decoupled Loadflow (SSDL) calculation method is characterized in that 1) modified real power mismatch at any PQ-node-p is calculated as RP | 11-13-2008 |
20090099704 | DIGITAL CONTROLLER - There is provided a digital controller which can generate no oscillation even if sensing a load side and enables control of supplying a desired voltage to the load. In an power amplifier which supplies an output voltage v | 04-16-2009 |
20090143920 | DIMMER HAVING A MICROPROCESSOR-CONTROLLED POWER SUPPLY - A two-wire load control device for control of power delivered to an electrical load from a source of AC voltage, comprising a first controllably conductive device adapted to be operatively coupled to the source of AC voltage and to the electrical load for controlling the power delivered to the load; a microprocessor coupled to the first controllably conductive device for controlling the first controllably conductive device; and a power supply adapted to be coupled to the source of AC voltage and coupled to the microprocessor for generating a DC voltage to power the microprocessor, the power supply including an energy storage element and a second controllably conductive device for controllably storing energy in the energy storage element; wherein the microprocessor is operatively coupled to the second controllably conductive device to control the second controllably conductive device. | 06-04-2009 |
20090198386 | Digital Excitation Control System Utilizing Swarm Intelligence and An Associated Method of Use - A system and method of use for self-tuning a PID controller utilized with an exciter and generator is disclosed. The system includes a power source, an exciter electrically connected to the power source, a generator that is electrically energized by the exciter, and a processor that provides a PID controller that calculates an estimated exciter time constant and an estimated generator time constant using particle swarm optimization (“PSO”) to control exciter field voltage. The particle swarm optimization (“PSO”) technique includes increasing the voltage reference by a predetermined percentage over a predetermined time period, initializing each particle position of exciter time constant and generator time constant, calculating generator voltage, performing a fitness evaluation and then obtaining and updating best values. This is followed by repeating the steps of determining the generator voltage, the fitness evaluation, and the best values over a predetermined number of iterations. | 08-06-2009 |
20090240382 | METHOD AND SYSTEM FOR CONTROLLING STABILITY OF ELECTRIC POWER SYSTEM - In the present invention, at each of the plurality of points in a wide area, the phase of voltage at a power supply outlet is detected. Data including the phase information and time information are sent to a data server. With one end of the system used as a phase angle reference, the data server observes phase differences at the other end and at the center of the system. The data server then extracts an inter-system fluctuation component from an obtained fluctuation, and constructs an expanded combined vibration model for data sets obtained through first-order and second-order differentiations of the component. The expanded combined vibration model is obtained by expanding a combined vibration model to include a known model of a PSS provided for a generator of interest. Time-series data regarding the state variables of the PSS at the time of construction of the expanded combined vibration model are obtained, and PSS parameters are determined directly therefrom by use of the expanded combined vibration model, whereby stabilization of the dominant modes is achieved. | 09-24-2009 |
20090265042 | System and Method for Providing Voltage Regulation in a Power Distribution System - A system and method of regulating the voltage of the power supplied to a plurality of power customers via a power distribution system that includes low voltage power lines and medium voltage power lines is provided. In one embodiment, the method includes measuring the voltage of a plurality of low voltage power lines at a plurality locations in the power distribution system with a plurality of voltage monitoring devices; with the plurality of voltage monitoring devices, transmitting voltage data in real time to a remote computer system; receiving, with the computer system, the real time voltage data of the voltage measured from the voltage monitoring devices; comparing, with the computer system, the real time voltage data with a first threshold value; and if the real time voltage data is beyond the first threshold value, transmitting with the computer system a first voltage adjustment instruction to a voltage control device configured to adjust the voltage supplied to a low voltage power line. | 10-22-2009 |
20100057268 | METHOD AND MODEL FOR EVALUATING TRANSMISSION ULTRACAPACITORS IN POWER SYSTEMS - A method and model for evaluating transmission ultracapacitor response in a power system. The method includes the steps of implementing a transmission ultracapacitor model into power system simulation software, simulating a desired condition of a power system, and determining a desired output power of a transmission ultracapacitor to define a control setpoint. The method further includes the steps of determining the transmission ultracapacitor limit, such that the desired output power does not exceed the transmission ultracapacitor limit, responding to the condition by adjusting output according to the control setpoint, and using the output in conjunction with other elements in the power system to determine an overall system response. | 03-04-2010 |
20100057269 | SYSTEMS AND METHODS FOR MONITORING A RAPPING PROCESS - A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper. | 03-04-2010 |
20100082177 | System and Method For Controlling Multiple Facts - Disclosed are a system and method with a cooperative control algorithm that can appraise voltage stability of a power system in cooperation with a supervisory control and data acquisition (SCADA)/emergency management system (EMS) for cooperative control on multiple parallel flexible alternating current transmission systems (FACTS) to enhance voltage stability, and that can calculate individual operation points of the FACTS. | 04-01-2010 |
20100094479 | System and Method for Providing Voltage Control in a Power Line Distribution Network - A system, method and device for controlling the voltage supplied to a customer premises that is supplied power from a substation via a power distribution network is provided and wherein a resident of the customer premises obtains internet access service via an internet access network. In one embodiment, the method includes measuring a voltage at an electrical outlet of the customer premises to provide voltage data with the device, determining whether the measured voltage is beyond a threshold voltage with the device or a remote computer, transmitting the voltage data over the internet access network of the customer premises to the remote computer from the device, and adjusting a voltage supplied to the power distribution network by the substation if the voltage is beyond a threshold voltage. The method may also include processing at least some of the received voltage data at the remote computer to determine whether to increase a voltage supplied by the substation or decrease a voltage supplied by the substation and further to determine an amount of the increase or decrease (if any). | 04-15-2010 |
20100094480 | APPARATUS AND A METHOD FOR A POWER TRANSMISSION SYSTEM - An apparatus for reducing subsynchronous resonance phenomena in a power transmission system. A determining arrangement determines components of the voltage from stator windings of a generator with one or more discrete frequencies. A calculating arrangement calculates, on a basis of the result of the determining, a voltage to be added to the voltage from the stator windings for reducing phenomena in the power system and an arrangement adapted to add the voltage calculated to the voltage from the stator windings. | 04-15-2010 |
20100114399 | DIGITAL CONTROLLER FOR CONTROLLING OUTPUT VOLTAGE UNDER LARGE VARIATIONS IN LOAD AND SUPPLY VOLTAGE - There is provided a digital controller which can reduce a variation in output voltage as compared to the conventional digital controller at the time of abrupt changes in load and in input of a power amplifier. The digital controller is built in the power amplifier for supplying an output voltage v | 05-06-2010 |
20100114400 | Voltage Regulation Optimization - A voltage regulation optimization (VRO) system receives inputs from a DCS or other distribution network control/monitoring system. The VRO then calculates optimized control commands for various network devices including the controllable taps of voltage regulating transformers. | 05-06-2010 |
20100138072 | CONTROL OF CELLS, MODULES AND A PACK COMPRISED OF HYBRIDIZED ELECTROCHEMISTRIES - A power management apparatus for a hybridized energy device includes a hybridized energy device including a plurality of units. The units include electrical energy storage and/or gathering cells, in series or in parallel to form a module. A plurality of the modules in series or in parallel form a pack. The power management apparatus also includes a central management apparatus (CMA) interconnecting a plurality of module management apparatus (MMAs) by means of either wired or wireless connections and a plurality of MMAs. Each MMA interconnects with a plurality of unit management apparatuses by means of either wireless or wired communication circuits. The power management apparatus further includes a plurality of units management apparatuses (UMAs), each wired, connected with, or deposited on a unit. Furthermore, the power management apparatus includes a rechargeable battery power source for a CMA, a plurality of MMAs, and a plurality of UMAs. | 06-03-2010 |
20100145546 | REFRIGERATOR AND OPERATING METHOD THEREOF - A refrigerator and a method of operating the same are disclosed. In the refrigerator and the method of operating the same, a voltage of an electric power input is measured and rectified through the half wave rectification or the full wave rectification in correspondence with the measured voltage, so that the refrigerator can be used without a voltage converting device when a voltage of the input power is changed. Therefore, the change or the modification of the circuit is not needed in order to use the refrigerator in other regions. Since components are compatible and utility of the components is improved, manufacturing costs can be reduced. | 06-10-2010 |
20100191389 | System and Method for Providing Voltage Regulation in a Power Distribution Network - A system, device and method for regulating the voltage at a customer premises that is supplied power via a first medium voltage power line is provided. In one embodiment, the method of using a computer system comprises determining medium voltage (MV) data comprising data of the voltage supplied to the first medium voltage power line at a plurality of times, storing the MV data for each of the plurality of times in a memory, determining current data comprising data of a current supplied to the medium voltage power line at the plurality of times, storing the current data at each of the plurality of times in memory in association with the voltage data of the same time. In addition, the method includes receiving low voltage data comprising data of a voltage measurement of a low voltage power line conductor at the customer premises at a plurality of times, storing at least some of the low voltage data in memory in association with MV data that corresponds to the voltage supplied to the first medium voltage power line during the voltage measurement of the low voltage power line conductor, and determining a supply voltage to be supplied to the first medium voltage power line based on the current data stored in memory, MV data stored in memory, and the low voltage data stored in memory. | 07-29-2010 |
20100198424 | METHOD FOR RECONFIGURABLY CONNECTING PHOTOVOLTAIC PANELS IN A PHOTOVOLTAIC ARRAY - A method for controlling output from a photovoltaic array comprises changing electrical connections between photovoltaic panels in the array in response to changes in parameters related to a selected power transfer objective. Examples of power transfer objectives include matching array impedance to changes in electrical load impedance, outputting power at a maximum power point value, and maintaining array output voltage within the input voltage range of an inverter during changes in temperature, illumination, or other parameters affecting photovoltaic panel output. Photovoltaic panels adapted for reconfigurable electrical connections to other photovoltaic panels, referred to as intelligent nodes, are electrically interconnected according to the disclosed method in combinations of serial and parallel circuits selected according to measured and calculated values of parameters related to the selected power transfer objective. A photovoltaic array operating in accord with the disclosed method may be rapidly reconfigured to adapt to changes in measured parameters or changes from one power transfer objective to another. | 08-05-2010 |
20100241286 | DRIVE SYSTEM FOR A TAP CHANGER - A drive system for operation of a tap changer for voltage regulation of a transformer on load. An electric motor is connectible to a movable part of the tap changer for moving the movable part for carrying out a tap change operation. An electric converter connects an electric power supply to the electric motor. A control arrangement is adapted to control the electric converter for controlling the operation of the motor and by that of the tap changer. | 09-23-2010 |
20100292863 | CONTROL SYSTEM AND A METHOD OF CONTROLLING A TCSC IN AN ELECTRICAL TRANSMISSION NETWORK, IN PARTICULAR BY AN APPROACH USING SLIDING MODES - A system and method of controlling a TCSC disposed on a high voltage line of an electrical transmission network. The system comprises: (a) a voltage measuring module; (b) a current measuring module; (c) a regulator, working in accordance with a non-linear control law to receive on its input the output signals from the two modules for measuring voltage and current, and a reference voltage corresponding to the fundamental of the voltage which is to obtained across the TCSC; (d) a module for extracting the control angle in accordance with an extraction algorithm; and (e) a module for controlling the thyristors (T | 11-18-2010 |
20100318238 | Voltage Regulation Using A Remote Metering Device - Regulation of a remote load center voltage from a local location of a voltage regulator and a voltage regulator control using voltage measurements from the remote load center obtained using a metering device at the load center in communication with the voltage regulator control. The metering device may obtain remote voltage information at the load center and communicate such to the voltage regulator control using a direct communications line, a wide area network, or the like. The communications may include electrical (e.g. copper cable), light (e.g. infrared over fiber optics), radio frequency, or the like. The voltage regulator control may be configured to use local measurements and a line drop compensation algorithm in the event that the remote voltage information becomes unavailable. | 12-16-2010 |
20100332047 | SYSTEMS AND METHODS FOR DISTRIBUTED POWER FACTOR CORRECTION AND PHASE BALANCING - A power management system includes a plurality of monitors, communicatively coupled together over a communications medium. Each respective monitor of the plurality of monitors is configured to capture power factor (PF) data at a corresponding distribution segment for calculation of a PF correction. | 12-30-2010 |
20110029149 | DETERMINING A BUS BAR VOLTAGE - A Substation Automation (SA) system in high or medium voltage power networks is provided for determining a bus bar voltage at a first node. The disclosure replaces a ‘real’ voltage transformer with an intelligent electronic device (IED) and/or a ‘virtual’ voltage transformer (VT), which determines the bus bar voltage at the first node from a first bay connected to the first node. The IED receives network message from a second IED of the SA system, indicating the bay voltage of the first bay connected to the first node. The IED also receives switch status of the switching device arranged between the first bay and the first node, from a third IED. Depending upon the switch status, the IED establishes the bay voltage as the bus bar voltage at the first node. | 02-03-2011 |
20110035077 | Distribution automation system for reactive power compensation and its voltage control method - Provided are a novel distribution automation system and its voltage control method, which can supply a stable voltage to a user by properly adjusting the settings of a control device so as to compensate for reactive power at each load terminal. The voltage control method includes: a first step of modeling a distribution system in the form of a distribution load based on constants of four terminals according to the connection type of each node and a distribution line, which constitute the distribution system; a second step of determining a formula for estimating the magnitude of a voltage at a node from a current value of an adjacent node; a third step of determining an objective function including the magnitude of the voltage, calculated through the formula determined in the second step, and a control variable for controlling the magnitude of the voltage; and a fourth step of calculating a value of the control variable to allow the determined objective function to have a minimum value and applying the calculated value to each voltage control device provided in the distribution system. | 02-10-2011 |
20110071700 | Auto-Compensating Power Converter - An auto-compensation method for compensating power regulators configured to generate a regulated output voltage. Auto-compensation may be performed dynamically by determining various coefficients of a compensation function used in compensating the power regulator, based on assumptions about the structure of the regulator and corresponding filters. The method may be used to determine at least the DC loop gain and the position of the compensation zeros, without requiring any prior knowledge of the values of the various components of the system. Furthermore, the selection of the compensation parameters (loop gain, position of zeroes) may be based on measurement of various state variables of the actual power converter, and adjustment of the various coefficients of the compensation function according to the measurements. Since no power-plant model of the power regulator is used, inaccuracies that would be inherent using any method that employs a model of the system instead of the system itself may be eliminated. | 03-24-2011 |
20110112704 | Power control panel, system and method - An electrical power management system includes a power intervening panel having a low voltage power supply having a low voltage output electrically coupled to a low voltage circuit, a low voltage common and a power load input, a power module array having a plurality of power contactor modules wherein each of the plurality of power contactor modules has a power contactor with a power load input and a power load output switchable between a closed and an open position and a low voltage switch operably connected to the power contactor for switching the power contactor between the closed and the open position, a low voltage signal relay module having a plurality of signal couplings wherein a primary coupling is a low voltage signal output connected to the low voltage power supply for transmitting a low voltage output signal to one of a direct digital controller and a digital timer and wherein a secondary coupling is a low voltage signal input for receiving the low voltage output signal from one of the direct digital controller and the digital timer, the secondary coupling being electrically coupled to the low voltage switch of one of the plurality of power contactor modules, and an enclosure containing the low voltage power supply, the power module array and the low voltage signal relay module. | 05-12-2011 |
20110130889 | Distributed Power Generation Interface - Described herein are methods, systems, and apparatus for a controller for a power circuit that interfaces distributed power generation with a power distribution grid, comprising: a first portion, including a maximum power point tracker, that receives signals corresponding to the distributed power generation voltage and current, and outputs to the power circuit a signal for controlling the voltage of the distributed power generation; a second portion, including a current reference generator, a current controller, and a dc voltage controller, that receives signals corresponding to a dc voltage of the power circuit, the power distribution grid voltage and current, and the inverter current, and outputs signals for controlling the power circuit output voltage; wherein the current reference generator includes nonlinear circuit elements and generates a current reference signal from the dc voltage of the power circuit and the grid voltage and current; such that substantially harmonic-free power is injected into the power distribution grid. The distributed power generation may be, for example, a photovoltaic module or a wind turbine. | 06-02-2011 |
20110153113 | CONTROL OF A VOLTAGE SOURCE CONVERTER USING SYNCHRONOUS MACHINE EMULATION - The invention concerns a method, device and computer program product for controlling a voltage source converter ( | 06-23-2011 |
20110160930 | Power Point Tracking - A local power converter may include a controller to manipulate the operating point of a local power converter to cause the power point tracking feature of a central power converter to operate at a point determined by the controller. In some embodiments, the controller can manipulate the operating point of the local power converter by alternating between at least two modes. In some other embodiments, the controller can manipulate the operating point of the local power converter to provide a substantially constant slope. In some other embodiments, the controller can maintain a substantially constant impedance ratio. In some other embodiments, the controller enables perturbations from the power point tracking feature of the central power converter to reach the power source. | 06-30-2011 |
20110172847 | ENERGY HARVESTING SYSTEM - An energy harvesting system includes: an energy harvesting unit for converting energy from a natural energy source into an electrical power signal; a power point tracking unit including a current tracing module capable of detecting a current of the electrical power signal, and a boundary control module; a microcontroller including a voltage detecting module capable of detecting a voltage of the electrical power signal, and a computing module for determining a maximum power point with reference to the voltage and the current of the electrical power signal, the boundary control module generating a switch control voltage signal with reference to the maximum power point; a storage unit capable of storing energy; and a pulse frequency modulation regulator for converting the electrical power signal into an intermediate signal with reference to the switch control voltage signal for subsequent storage of energy of the intermediate signal in the storage unit. | 07-14-2011 |
20110190959 | FUEL CELL SYSTEM - Even in a case where a rapid variance is demanded as to the input voltage of a converter and the output terminal voltage of a fuel cell, stable converter control is realized. On judging that the change ratio of the demand power of a fuel cell exceeds a set threshold value, a controller executes converter stabilization processing. First, the controller controls a battery converter so that an input voltage of an inverter becomes a set target input voltage. Then, after the input voltage of the inverter reaches the target input voltage, the controller controls an FC converter so that an output terminal voltage of the fuel cell becomes a set target output terminal voltage. | 08-04-2011 |
20110231029 | POWER FEEDING SYSTEM AND ELECTRICAL POWERED VEHICLE - Power feeding is performed in a non-contact manner from a power feeding device to an electrical powered vehicle by resonance of a primary self-resonant coil of the power feeding device and a secondary self-resonant coil of the electrical powered vehicle through an electromagnetic field. The electric power received by the secondary self-resonant coil is rectified by a rectifier, and voltage-converted by a DC/DC converter to be supplied to a power storage device. A vehicle ECU controls the DC/DC converter such that the voltage between the rectifier and the DC/DC converter attains a target voltage. | 09-22-2011 |
20110245990 | SYSTEM AND METHOD FOR CONNECTING A CONVERTER TO A UTILITY GRID - The present invention relates to a system and a method for connecting and/or interfacing a converter, such as a switched mode converter, to an electrical power grid. The invention furthermore relates to control of the converter. The present invention facilitates that the point of common coupling (PCC) between a utility grid and a converter is provided at the converter output. This facilitates that a converter, and thereby an electrical power source, may be connected to an electrical power grid without use of an inductor, such as a reactor. | 10-06-2011 |
20110264299 | METHOD AND SYSTEM FOR MANAGING POWER QUALITY AND EFFICIENCY - A system and method for managing power uses a power meter that is electronically connected to a first point on a multiphase power distribution system to measure power information at that point. It determines harmonic distortion and true power factor correction based on the power information, and then determines configuration information for an active filter. The configuration information is send to one or more active filter to adjust harmonic distortion and true power factor correction on a second point in the distribution system. | 10-27-2011 |
20110270463 | STATIC SYNCHRONOUS GENERATORS - The invention is concerned with a device and a method for controlling an inverter associated with a power source, which typically will be a distributed power source. The role of an inverter is to modulate the electrical power output, e.g. to provide a three phase AC electrical output at suitable voltage, where the output is to be supplied to a conventional power distribution, grid. The invention involves modelling the behaviour of a synchronous electrical generator. Variables represent the angular position and rotational speed of the virtual rotor ( | 11-03-2011 |
20110276195 | Method and System for Extracting Electric Power from a Renewable Power Source - The plant comprises: a DC-voltage electric power source ( | 11-10-2011 |
20110295441 | DIGITAL CONTROL DEVICE FOR A PARALLEL PMOS TRANSISTOR BOARD - A digital control device for a parallel PMOS transistor board, includes: an operative memory for digitally storing error data between a target voltage and a setpoint voltage as well as control data, each datum being provided with a time marker, a digital selected order filter ( | 12-01-2011 |
20110313591 | Method and system for controlling a power production entity - A method for controlling a power production entity is provided. The method includes generating a plurality of electric power signals by a plurality of power production entities, measuring a plurality of power levels of the plurality of power signals, modifying the plurality of power signals, supplying the plurality of modified power signals at a common node, and adjusting an operation voltage of at least one power production entity of the plurality of power production entities based on the plurality of measured power levels such that a power loss of the power signals caused by the modifying and/or supplying is minimized. Also a system for controlling a power production entity is described. | 12-22-2011 |
20120022713 | Power Flow Simulation System, Method and Device - Embodiments of the present invention provide power flow analysis and may process electrical power distribution system data in real time to calculate load, current, voltage, losses, fault current and other data. The power flow analysis system may include a detailed data model of the electrical power distribution system, and may accept a variety of real time measurement inputs to support its modeling calculations. The power flow analysis system may calculate data of each of the three distribution system power phases independently and include a distribution state estimation module which allows it to incorporate a variety of real time measurements with varying degrees of accuracy, reliability and latency. | 01-26-2012 |
20120022714 | WIND TURBINE WITH A CONTROLLER CONFIGURED TO MANAGE RESONANT EFFECTS - A method and apparatus of operating a controller usable for operating a wind turbine is provided. The wind turbine includes a voltage converter being connectable to a power grid via a filter arrangement. The method includes determining a line voltage and adding the determined line voltage to the output of the voltage converter with a time delay. The time delay is adjusted such that resonant effects occurring at the filter arrangement are decreased. | 01-26-2012 |
20120029723 | CENTRALIZED POWER CONDITIONING - A power plant for providing electric power to a power grid includes energy sources; power conditioning units and a controller configured to cause power provided to the grid to have selected electrical characteristics. The controller is in high speed real-time communication with the power conditioning units and programmed to provide instructions to the power conditioning units. | 02-02-2012 |
20120035780 | INTELLIGENT POWER SAVING SYSTEM - An intelligent power saving system, disposed between a Utility Power Supply and at least a load, comprising: at least an energy storage device; at least a power supply line, connected to said Utility Power Supply and said load; at least an energy-storage-device-parallel-connection circuit, connecting said energy storage device electrically to said power supply line; and a power monitor, connected electrically to said Utility Power Supply, said energy storage device, and said energy-storage-device-parallel-connection circuit, thus determining whether said energy storage device is required to join in providing power to said load through said energy-storage-device-parallel-connection circuit, thus regulating percentage of total power supplied by said Utility Power Supply, preventing overload of said Utility Power Supply, hereby saving expense of the electric utility bills. | 02-09-2012 |
20120046799 | OVERHEAD POWER LINE MONITOR - A device for monitoring and measuring the electrical and mechanical parameters of a power line conductor. Sensors of the device measure conductor temperature, the angle of inclination of the overhead conductor, current flowing in the conductor, and voltage to ground. The device has a low-power mode in which parameters of the power line conductor are not measured. Upon detecting a change in an electrical or mechanical value of the power line conductor, the device measures parameters of the power line conductor for a predetermined length of time before returning to the low power mode. | 02-23-2012 |
20120065806 | METHOD FOR MEASURING ENERGY USAGE IN AN APPLIANCE - The present subject matter relates to methods and apparatus for measuring energy usage in an appliance, particularly a washing appliance. A display, that may be a home energy monitor, is associated with the appliance. The appliance may include an AC-DC power supply and a controllable inverter configured to supply power to a motor associated with the appliance. Real power consumption is calculated by a controller that may also be used to control the inverter and other operational aspects of the appliance and causes the calculated real power to be displayed on the display. | 03-15-2012 |
20120065807 | CONTROL APPARATUS, AN ON-VEHICLE DEVICE AND A SYSTEM - A control apparatus configured to control communication between an on-vehicle device and a device coupled to the on-vehicle device via a cable, the control apparatus comprising: a cable length detecting part configured to detect a length of the cable; and a power supply voltage controlling part configured to control, based on the length of the cable detected by the cable length detecting part, a power supply voltage in a connector connected to the device by changing a power supply voltage applied to a power supply line of the cable. | 03-15-2012 |
20120078436 | Method of Artificial Nueral Network Loadflow computation for electrical power system - Neural Network Loadflow (NNL) computation method is invented involving input vector composed of net nodal injection of real and reactive powers and diagonal elements of conductance and susceptance matrices multiplied by the squared voltage magnitude components of the flat-start normally used as initial solution estimate guess for loadflow solution by conventional NRL or SSDL methods. Training, and testing/validating input-output data sets are generated by applying uniform and non-uniform scaling factors applied to base case loads at PQ-nodes, resistance and reactance of transmission line branches. These scale factors are increased until loadflow solution by conventional methods such as Newton-Raphson Loadflow and Super Super Decoupled Loadflow methods diverge. Divergence of loadflow methods are due to node voltage, node angle, and numerical instabilities. Voltage magnitude and phase angle values in the solution before divergence are respective stability limits and voltage magnitude and phase angle values in loadflow solution provide direct measure to the respective stability margins. Also Suresh's diakoptiks based feature selection technique is presented for ANNs calculating one node variable with one neuron each in their output layers. | 03-29-2012 |
20120083940 | FUEL CELL SYSTEM AND POWER CONTROL METHOD THEREFOR - There are provided a fuel cell system capable of reducing power consumption by inhibiting an unnecessary operation of a DC-DC converter, and a power control method therefor. The fuel cell system having an inverter which is connected to a load device, a first converter which is connected between a fuel cell and the inverter and sets an output voltage of the fuel cell, and a second converter which is connected between a power storage device and the inverter and sets an input voltage of the inverter includes fuel cell required output voltage calculation means for calculating a required output voltage of the fuel cell, inverter required input voltage calculation means for calculating a required input voltage of the inverter, comparison means for comparing the required output voltage of the fuel cell and the required input voltage of the inverter, and converter operation control means for causing the operation of the first converter to be suspended when judgment is made that the required output voltage of the fuel cell is not less than the required input voltage of the inverter. | 04-05-2012 |
20120123606 | System and Method for Providing Voltage Regulation in Power Distribution System - A system and method of regulating the voltage of the power supplied to a plurality of power customers via a power distribution system that includes low voltage power lines and medium voltage power lines is provided. A method may include measuring the voltage of a plurality of low voltage power lines at one or more customer premises in the power distribution system with corresponding voltage monitoring devices. The voltage monitoring devices transmit voltage data in real time to a remote computer system. The computer system receives the real time voltage data of the voltage measured from the voltage monitoring devices. The computer system compares the real time voltage data with a first threshold value; and if the real time voltage data is beyond the first threshold value, transmitting a first voltage adjustment instruction to a voltage control device configured to adjust the voltage supplied to a low voltage power line. | 05-17-2012 |
20120209447 | COMMUNICATION CONVERTER FOR CONNECTING AN AUTOMATION DEVICE TO A COMPUTER AND METHOD FOR CONTROLLING THE COMMUNICATION CONVERTER - A communication converter for connecting automation devices having different operating voltages to a host computer, including an interface component and a transceiver component coupled to the interface component, the interface component being connected on the input side via a host connector to a host interface of the host computer and the transceiver component being connected via a device connector to a device interface of the automation device, and a voltage transformer, which on the input side is connected via the host interface to an operating voltage and on the output side to a voltage supply line of the device interface. So the communication converter can communicate with devices having different interface standards, the converter has a first current/voltage measuring unit, a second current/voltage measuring unit, and a switching device. | 08-16-2012 |
20120215372 | Detection and Prevention of Hot Spots in a Solar Panel - Methods, apparatus and systems for controlling a photovoltaic panel 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 power converter based on the determined parameter. The power converter may be a pulse amplitude modulated current converter (PAMCC). 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, and the power demand from the solar panel may be controlled such that the output voltage does not vary from the expected value by more than a predetermined value. | 08-23-2012 |
20120253541 | System 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. | 10-04-2012 |
20120271479 | VOLT/VAR SWITCH PLAN - A power distribution system includes at least one power distribution device and a computer coupled to the power distribution device, wherein the computer includes a memory area configured to store a hierarchy of the power distribution device. The computer is configured to adjust a first voltage level of a first power distribution device, wherein the first power distribution device is a first tier of the hierarchy, and adjust at least a second voltage level of at least a second power distribution device, wherein the second power distribution device is a second tier of the hierarchy. The computer is also configured to generate a switch plan for the power distribution device based on the adjusted first voltage level and the adjusted at least a second voltage level. | 10-25-2012 |
20120277931 | MICRO CONTROL UNIT FOR PROVIDING STABLE VOLTAGE OUTPUT TO ELECTRIC DEVICE AND SYSTEM FOR PROTECTING ELECTRIC DEVICE - The present invention is to disclose a micro control unit for an electric device. It includes a charge pump regulator, connected to an external DC power source, for boosting and regulating voltage outputted from the DC power source; and a controller, switched between the external DC power source while a current of the DC power source is stable and the charge pump regulator while the current is unstable, for outputting a stable voltage to the electric device, thereby eliminating damage to the electric device caused by input surge current. | 11-01-2012 |
20120290145 | Single-stage grid-connected solar inverter for distributed reactive power generation - The present invention proposes a method and a system for generating a bidirectional power flow between a DC component and an AC grid for a distributed power generation system using solar panels. The system includes an inverter that further includes a DC component for generating DC power and a single-stage DC-AC converter for converting the DC power into AC power by operating in one or more pre-defined modes. The AC power includes a reactive power component and an active power component. | 11-15-2012 |
20120296491 | REDUCING DEMAND/RESPONSE EFFECTS IMPLEMENTING VOLT/VAR CONTROL - A method for reducing effects of a demand/response event in a power distribution network can include identifying a load profile in the power distribution network, in response to detecting a peak in the load profile, decreasing voltage in the power distribution network and in response to a detecting a trough in the load profile, increasing the voltage in the power distribution network. | 11-22-2012 |
20120303175 | MODIFICATION OF CONTROL PARAMETERS BASED ON OUTPUT POWER - A system and method is provided for calculating a power output and coordinating the reduction of voltage and wire speed; if the computed power output does exceed the power supply capacity. | 11-29-2012 |
20120310438 | HIGH DYNAMIC DC-VOLTAGE CONTROLLER FOR PHOTOVOLTAIC INVERTER - A method for initializing a power inverter of a photovoltaic system includes: opening an AC mains switch and a DC switch to disconnect the power inverter from an electrical grid and to disconnect a capacitor bank associated with the inverter from a solar cell array; closing the AC mains switch to allow power to flow from an electrical grid to the DC capacitor bank to charge the DC capacitor bank; monitoring the DC capacitor bank until a desired voltage is reached; initiating the operation of the power inverter; stabilizing the DC voltage received from the DC capacitor bank at a predetermined power up voltage for the power inverter; waiting for an inverter initialization period to elapse; and adjusting DC voltage received by the power inverter to a voltage associated with a maximum power output level of the solar cell array. | 12-06-2012 |
20120323399 | BUS NETWORK - A system according to various embodiments of the disclosure includes a bus and a plurality of devices coupled to the bus, the devices configured to communicate with each other via the bus. The system further includes a power supply coupled to the bus, the power supply for supplying power to the plurality of devices via the bus. The power supply is configured to detect an event, and in response to the event, alternately supply power to the plurality of devices via the bus at a first current level or at a second current level, the second current level less than the first current level. Among other things, embodiments in this disclosure help allow additional devices to be used on a bus, even where the total power consumption of the devices would normally exceed a maximum defined by a bus architecture. Furthermore, various embodiments help allow a single gauge of wire to be used throughout a bus network (even where long lengths of wire are required) while still providing sufficient power to the devices connected to the bus. | 12-20-2012 |
20130013125 | METHODS AND SYSTEMS FOR DETERMINING AN ASSOCIATION BETWEEN NODES AND PHASES VIA A SMART GRID - Determining the number of loads associated with each phase in a three-phase electric power system. The loads can be associated with the consumption of electric power at a node, such as a metering device located at a facility. In one implementation, a central device that is connected to such nodes via a smart grid and a radio frequency mesh network can be leveraged to determine a phase in real time. For example, the central device can include a processor that executes one or more computer program modules which can cause a load tap changer having access to a distribution feeder in the smart grid to vary a voltage level supplied across each phase of the power system. Additionally, the central device can communicate with nodes in the mesh network to cause the nodes to perform voltage measurements and collect information related to such measurements. | 01-10-2013 |
20130030597 | DEVICES AND METHODS FOR DECENTRALIZED POWER FACTOR CONTROL - Devices and methods for the decentralized, coordinated control of the power factor on an electrical distribution system are provided. For example, a controller may include a network interface and data processing circuitry. The network interface may receive first measurements associated with a segment of an electrical distribution system and transmit a control signal configured to control equipment of the segment of the electrical distribution system. The data processing circuitry may run simulations of the segment of the electrical distribution system in various equipment configurations, selecting from among the various equipment configurations an equipment configuration that is expected to cause the power factor to approach a desired value. The data processing circuitry then may generate the control signal, which may cause the equipment of the segment of the electrical distribution system to conform to the equipment configuration and thereby control the power factor. | 01-31-2013 |
20130030598 | DEVICES AND METHODS FOR DECENTRALIZED VOLT/VAR CONTROL - Devices and methods for the decentralized, coordinated control of the voltage and active power losses of an electrical distribution system in light of one another are provided. For example, a controller may include a network interface and data processing circuitry. The network interface may receive first measurements associated with a segment of an electrical distribution system and transmit a control signal configured to control equipment of the segment of the electrical distribution system. The data processing circuitry may run simulations of the segment of the electrical distribution system in various equipment configurations, selecting from among the various configurations one that is expected to cause the voltage deviation and the active power losses of the segment to approach desired values while keeping power factor within a desired range. The data processing circuitry then may generate the control signal, which may cause the equipment of the segment of the electrical distribution system to conform to the equipment configuration. | 01-31-2013 |
20130030599 | DEVICES AND METHODS FOR DECENTRALIZED COORDINATED VOLT/VAR CONTROL - Devices and methods for decentralized coordinated Volt/VAR control are provided. Such a device may allow, for example, an operational parameter such as voltage, power losses, a combination of these, and/or power factor to be optimized on a segment of an electrical distribution system under certain conditions. For example, a controller may include a network interface to receive measurements and data processing circuitry to optimize a voltage deviation, active power losses, or a combination thereof, based at least in part on the total load on the segment of the electrical distribution system. | 01-31-2013 |
20130046416 | Solar Photovoltaic System - Disclosed is a solar photovoltaic power generator system that includes a solar cell panel and a power conditioner that controls a voltage or a current of generated power output from the solar cell panel as an operating value in accordance with a characteristic of the solar cell panel to search a maximum output point of the generated power so as to be supplied to a power system. The power conditioner includes a data memory module that stores a plurality of operating values and a plurality of patterns of the generated powers from the solar cell panel based on the operating values, and a maximum power point tracking module that adds a new operating value based on the pattern of the generated power in the past to calculate the operating values for the next search, and sets the maximum value through an algorithm. | 02-21-2013 |
20130073108 | SYSTEM AND METHOD FOR REAL-TIME MONITORING OF POWER SYSTEM - A real-time distributed wide area monitoring system is presented. The real-time distributed wide area monitoring system includes a plurality of phasor measurement units that measure respective synchronized phasor data of voltages and currents. The real-time distributed wide area monitoring system further includes a plurality of processing subsystems distributed in a power system, wherein at least one of the plurality of processing subsystems is configured to receive a subset of the respective synchronized phasor data, process the received subset of the respective synchronized phasor data to determine respective system parameters, wherein the plurality of processing subsystems are time synchronized. | 03-21-2013 |
20130073109 | DROOP CONTROL SYSTEM FOR GRID-CONNECTED SYNCHRONIZATION - A droop control system for grid-connected synchronization connects to a plurality of distributed power generation modules and a utility grid system. The droop control system includes a detection processing module and a plurality of regulation control modules corresponding to the distributed power generation modules. The detection processing module is coupled with the distributed power generation modules and utility grid system in parallel to obtain a voltage difference, a phase angle difference and a frequency difference. The regulation control modules perform droop control of real power-frequency variety and reactive power-voltage variety and phase angle compensation. Through reactive power-voltage variety droop control approach, impact of impedance alterations in the power system can be eliminated and voltage fluctuations can also be minimized to achieve stable effect. Hence electric power of the utility grid system and distributed power generation modules can be regulated synchronously. | 03-21-2013 |
20130079945 | METHOD AND SYSTEM FOR OPERATING A POWER GENERATION AND DELIVERY SYSTEM - A method for controlling operation of a power generation and delivery system while increasing a power output of the power generation and delivery system is described. The method includes, monitoring an output parameter of the power generation and delivery system and determining a rate of change of the output parameter as a function of time. A reactive current command signal is generated a as a function of the determined rate of change of the output parameter. Operation of a power converter is controlled based at least partially on the reactive current command signal to facilitate maintaining a substantially constant terminal voltage as the power output of the power generation and delivery system is increased. | 03-28-2013 |
20130138259 | POWER GENERATION APPARATUS - A power generation apparatus includes a power calculation unit configured to receive voltage information and temperature information from a power generation module, and calculate power generation information of the power generation module based on the received voltage information and temperature information. | 05-30-2013 |
20130138260 | Systems and Methods for Switch-Controlled VAR Sources Coupled to a Power Grid - Systems and methods for switch-controlled VAR sources coupled to a power grid are described. In some embodiments, a system comprises a distribution power network coupled to a first switch-controlled VAR source. The first switch-controlled VAR source may comprise a processor, a voltage compensation component, and a switch. The first switch-controlled VAR source may be configured to obtain a first delay value, monitor a first proximate voltage, initiate a first delay duration based on the comparison of the first proximate voltage to at least one set point, the first delay duration being based on the first delay value, determine, with the processor, after the first delay duration, whether to connect the voltage compensation component based on the monitored voltage, and control, based on the determination, the switch to connect the voltage compensation component to adjust a network voltage or a network voltage component. | 05-30-2013 |
20130144456 | METHOD FOR STARTING APPLICATION SMARTLY AND POWER-EFFICIENTLY - A method for starting an application smartly and power-efficiently is applicable to a portable electronic device installed with an application and hardware. The portable electronic device receives a voltage generated from a power supply, such as an internal battery power or an external power. After the portable electronic device has started, a connection between the application and the hardware is created. Upon detection that the voltage originates from the external power, the application is executed based on a preset schedule to start the hardware corresponding to the application until it is detected that the source of the voltage has been switched to the internal battery power. Upon the detection that the source of the voltage has been switched to the internal battery power, a user determines whether to change the state of use of the hardware, thereby rendering the portable electronic device smart and power-efficient. | 06-06-2013 |
20130184894 | ELECTRIC POWER GRID CONTROL SYSTEM AND METHOD FOR ELECTRIC POWER CONTROL - An electric power grid control system is provided with: distributed generators connected to an electric power grid; and voltage measurement units that measure voltage at connection points of the distributed generators to the electric power grid. When voltage at a connection point to the electric power grid deviates from a predetermined acceptable range, a centralized control device equally allocates a voltage adjustment amount for returning the voltage to the acceptable range to all distributed generators belonging to a predetermined group that was set in advance. Distribution processing devices cause the distributed generators to adjust voltage at the connection points in accordance with the voltage adjustment amount allocated from the centralized control device. | 07-18-2013 |
20130282197 | Systems and Methods for Synchronized Control of Electrical Power System Voltage Profiles - Disclosed herein are various embodiments of systems and methods for controlling a voltage profile delivered to a load in an electric power system. According to various embodiments, an electric power system may include an electric power line, a variable tap transformer, and a capacitor bank. The variable tap transformer may include a plurality of tap positions. A tap change controller may be coupled with the variable tap transformer and may control the tap positions of the variable tap transformer. A capacitor bank controller may be coupled with the capacitor bank and may selectively couple the capacitor bank to the electric power line. The tap change controller and the capacitor bank controller may share system information related to the voltage profile along the electric power line and to change the voltage profile along the line using the variable tap transformer and the capacitor bank depending on the system information. | 10-24-2013 |
20140005853 | METHOD AND SYSTEM FOR MONITORING ELECTRICAL LOAD OF ELECTRIC DEVICES | 01-02-2014 |
20140046500 | USE OF DISTRIBUTED GENERATOR (DG) INVERTERS AS STATCOMS FOR DECREASING LINE LOSSES - The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation, thereby decreasing system line losses. | 02-13-2014 |
20140046501 | AUTOMATIC VOLTAGE CONTROL METHOD BASED ON COOPERATIVE GAME THEORY - A security and economy coordinated automatic voltage control method based on a cooperative game theory is provided. The method includes: establishing a multi-objective reactive voltage optimizing model of a power system; resolving the multi-objective reactive voltage optimizing model into an economy model and a security model; solving the economy model and the security model based on the cooperative game theory to obtain the automatic voltage control instruction; and performing an automatic voltage control for the power system according to the automatic voltage control instruction. | 02-13-2014 |
20140107856 | ADJUSTABLE SHUNT REGULATED & SWITCHING POWER SUPPLY FOR LOOP POWERED TRANSMITTER - A loop powered process instrument comprises a control system measuring a process variable and developing a measurement signal representing the process variable. An output circuit, for connection to a remote power source using a two-wire process loop, controls current on the loop in accordance with the measurement signal. A power supply is connected to the output circuit and the control system. The power supply receives power from the two wire process loop and supplies power to the control system. The power supply comprises a voltage regulator receiving loop power and developing a regulated output voltage and an adjustable shunt regulator controlling voltage supplied to the voltage regulator. | 04-17-2014 |
20140107857 | DIGITALLY CALIBRATED VOLTAGE REGULATORS FOR POWER MANAGEMENT - A computer provides a graphical user interface for displaying a virtual representation of a voltage regulator and for accepting a user requirement for the voltage regulator. The computer automatically determines an internal calibration setting of the voltage regulator that meets the user requirement. The computer simulates operation of the voltage regulator as calibrated with the internal calibration setting. The internal calibration setting is downloaded to the voltage regulator. A calibration controller of the voltage regulator receives the internal calibration setting and outputs digital calibration bits in accordance with the internal calibration setting. The digital calibration bits works in conjunction with interface circuits to adjust circuits of a voltage regulator core to digitally calibrate the voltage regulator. | 04-17-2014 |
20140107858 | SYSTEM AND METHOD FOR ESTIMATING PERFORMANCE METRICS OF CONSERVATION VOLTAGE REDUCTION (CVR) SYSTEMS AND VOLT/VAR OPTIMIZATION SYSTEMS - A system and method for estimating performance metrics of conservation voltage reduction (CVR) systems and VOLT/VAR optimization systems is disclosed. | 04-17-2014 |
20140121851 | HEATER CONTROL APPARATUS AND SENSOR CONTROL SYSTEM - A heater control apparatus (1) includes a heater driver ( | 05-01-2014 |
20140148966 | Decentralized Volt/VAR Control for Advanced Distribution Automation Systems - A general decentralized voltage control scheme is proposed to coordinate the operation of DG, Voltage regulator and Capacitor banks. The present invention is based on placing a Remote Terminal Unit (RTUs) at each distribution generation (DG) and each at line capacitor. These RTUs being coordinated together through communication protocols form a multi-agent system. Novel decentralized system is proposed to estimate the voltage profile change as a result of injecting reactive power at the capacitor bus. Simulation results are presented to show the validity and the effectiveness of the present invention. | 05-29-2014 |
20140156101 | System and Method For Routing Power Across Multiple Microgrids Having DC and AC Buses - Systems and methods are described herein for managing the operations of a plurality of microgrid modules. A microgrid module includes transformers and/or power converters necessary for modifying the input AC or DC power sources to meet the required characteristics of the output power. The microgrid module further comprises a control software module and a power router software module. The control software module receives data from sensors in the microgrid module and controls the flow of power with controllable elements. The power router software module controls the operation of the power router. The power router can detect changes in demand for power within the microgrid module or from other microgrid modules. The power router can adjust the flow of power between the microgrid modules in response to changes in the supply of power to the microgrid module and changes in the demand for power from the microgrid module. | 06-05-2014 |
20140188301 | ELECTRIC POWER CONTROL SYSTEM AND PROCESS - A method and apparatus for controlling electric power supplied to one or more electrical devices from a power source are disclosed. Measurements of the supplied electricity are detected. Estimated deviant voltage levels that the supplied electricity will not drop below or exceed as a result of varying electrical consumption by the one or more electrical devices is computed based on a predetermined confidence level and the detected measurements. A voltage level output of the electricity supplied to the electrical device is adjusted based on the computed deviant voltage level. | 07-03-2014 |
20140195064 | SMART APPARATUS AND HOME NETWORK SYSTEM USING THE SAME - A smart apparatus including: a storage unit that stores a current profile supplied to a home appliance according to an operation of the home appliance; a current detector that detects a current value supplied to the home appliance; and a controller that generates operating information of the home appliance based on the current value detected by the current detector and the current profile stored in the storage unit, wherein the smart apparatus determines an operation and an operation time of the home appliance based on current or power supplied to the home appliance without adding a new configuration to an existing home appliance. | 07-10-2014 |
20140195065 | CONTROL CIRCUIT FOR PROGRAMMABLE POWER SUPPLY - A control circuit for a programmable power supply is provided. It comprises a reference generation circuit generating a voltage-reference signal and a current-reference signal for regulating an output voltage and an output current of the power supply. A feedback circuit detects the output voltage and the output current for generating a feedback signal in accordance with the voltage-reference signal and the current-reference signal. A switching controller generates a switching signal coupled to switch a transformer for generating the output voltage and the output current in accordance with the feedback signal. A micro-controller controls the reference generation circuit. The micro-controller, the reference generation circuit, and the feedback circuit are equipped in the secondary side of the transformer. The switching controller is equipped in the primary side of the transformer. The control circuit can achieve good performance for the programmable power supply. | 07-10-2014 |
20140207305 | ELECTRICAL ENERGY SUPPLY SYSTEM - An electrical energy supply system providing voltage to a load and including an external power group and a DC supply device is disclosed. The external power group provides an external voltage. The DC supply device includes a bus, a converting unit, a storage unit and a smart energy management system (SEMS). The bus receives the external voltage and is coupled to the load. The converting unit converts the external voltage into a converted voltage or converts a stored voltage to generate a converted result and provides the converted result to the bus. The storage unit stores the converted voltage or provides the stored voltage to the converting unit. The SEMS controls at least one of the converting unit, the external power group and the load according to at least one of the external voltage, a voltage level of the bus and a voltage level of the storage unit. | 07-24-2014 |
20140222240 | METHOD AND DEVICE FOR SIMULATING AN ELECTRIC/ELECTRONIC LOAD - A device connectable to a control device for simulating an effect of at least one electrical or electronic load being connected to at least one terminal of the control device includes: a processing unit configured to at least one of compute and make available a control variable corresponding to the effect of the at least one electrical or electronic load that is to be simulated, and a power supply device: The power supply device includes at least one auxiliary voltage source configured to form at least one of a current source and a current sink and configured to receive the control variable from the processing unit. The at least one auxiliary source is configured to draw a current from the control device or impress a current on the control device based on the received control variable. | 08-07-2014 |
20140244065 | VOLTAGE STABILITY MONITORING IN POWER SYSTEMS - Systems and methods for voltage stability monitoring in power systems are disclosed herein. In one embodiment, a method includes receiving data representing a set of system parameters of a power system having one or more power buses under a load condition. The method also includes estimating one or more sets of the system parameters under one or more additional load conditions based on the received data and topology information of the power system. The method further includes determining a voltage stability index for the power system based on both the received set of system parameters and the estimated one or more sets of the system parameters. | 08-28-2014 |
20140277812 | DUAL LOOP DIGITAL LOW DROP REGULATOR AND CURRENT SHARING CONTROL APPARATUS FOR DISTRIBUTABLE VOLTAGE REGULATORS - Described is an apparatus which comprises: a plurality of transistors coupled to an input power supply and to a load; a first comparator with a first node coupled to the load, and a second node coupled to a first reference; a second comparator with a first node coupled to the load, and a second node coupled to a second reference, the second reference being different from the first reference; and a logic unit to receive output of the first comparator and output of the second comparator, the logic unit to turn on or off transistors of the plurality of transistors according to outputs of the first and second comparators. | 09-18-2014 |
20140277813 | MAXIMIZING OF ENERGY DELIVERY SYSTEM COMPATIBILITY WITH VOLTAGE OPTIMIZATION USING AMI-BASED DATA CONTROL AND ANALYSIS - A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system. In addition the VCC system monitors pattern recognition events and compares them to the report-by-exception data to detect HVL events. If one is detected the VCC optimizes the capacity of the EEDS to respond to the HVL events by centering the piecewise linear solution maximizing the ability of the EDDS to absorb the HVL event. | 09-18-2014 |
20140277814 | ELECTRIC POWER SYSTEM CONTROL WITH MEASUREMENT OF ENERGY DEMAND AND ENERGY EFFICIENCY USING T-DISTRIBUTIONS - A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of voltage measurement using paired t statistical analysis applied to calculating a shift in average usage per customer from one time period to another time period for a given electrical use population where the pairing process is optimized using a novel technique to improve the accuracy of the statistical measurement. | 09-18-2014 |
20140288725 | POWER-DISTRIBUTION-SYSTEM VOLTAGE CONTROL SYSTEM, POWER-DISTRIBUTION-SYSTEM VOLTAGE CONTROL METHOD, AND CENTRALIZED VOLTAGE CONTROL APPARATUS - A centralized voltage control apparatus calculates an optimum voltage distribution in a centralized control cycle period and determines, based on the relationship between the optimum voltage distribution and a proper voltage range, voltage upper and lower limit values for which a command is issued to each local voltage control apparatus taking into account voltage upper and lower limit margin amounts at respective points in a voltage control responsible range of the local voltage control apparatus for each local voltage control apparatus. The local voltage control apparatus adjusts, based on the voltage upper and lower limit values commanded from the centralized voltage control apparatus via a communication network, a control amount of a voltage control device every local control cycle shorter than the centralized control cycle period, to maintain the control voltage of the voltage control device between the voltage upper and lower limit values. | 09-25-2014 |
20140303803 | INTEGRATION SYSTEM AND METHOD FOR REGULATING AND OPERATING IN PARALLEL DIFFERENT HIGH-VOLTAGE SOURCES - The present invention provides systems and methods for integration and for the regulation and parallelism among different models of voltage sources and/or high voltage energized gaps. In a preferred embodiment, the present invention provides an efficient and inexpensive way to integrate equipment such as transformers, in any amounts, with different voltages and different specifications in the same parallelism logic, meeting strict criteria and requirements. | 10-09-2014 |
20140316603 | COMPUTER SYSTEM, ARRANGEMENT FOR REMOTE MAINTENANCE AND REMOTE MAINTENANCE METHOD - A computer system includes a power supply unit providing at least one first supply voltage for operation of the computer system, a system board has at least one first power supply line that distributes the at least one first supply voltage; at least one processor arranged on the system board and coupled to the first power supply line that executes program code of user programs; a system monitoring module arranged on the system board having a microcontroller that executes program code for remote maintenance; at least one network interface coupled to the system monitoring module; and at least one splitter, coupled to the network interface that taps off a remote feed voltage provided via the network interface and feeds in a second supply voltage into at least one second power supply line of the system board, the second power supply line being coupled to the system monitoring module. | 10-23-2014 |
20140316604 | METHOD FOR ACTIVE CONTROL OF FREQUENCY AND VOLTAGE IN A POWER SUPPLY GRID WITH DECENTRALIZED POWER SUPPLY SYSTEMS - The invention relates to a method for actively controlling in a feedback control at least one output parameter (f | 10-23-2014 |
20140379161 | Stabilizing a Voltage Supply Network - Methods and devices are provided for network stabilization in smart grid voltage supply networks. Methods for stabilizing voltage supply network include: (1) receiving a control signal by a gateway of at least one subscriber; (2) generating local control commands for turning energy consumption or energy generating devices connected to the gateway on or off by the gateway of the subscriber in dependence on the received control signal; and (3) transmitting the generated local control command via a local network to at least one energy consumption or energy generating device connected to the gateway, wherein the gateway has an effective threshold value, the local control commands for turning on or off are generated when a value transmitted with the control signal exceeds or drops below the effective threshold value, and the effective threshold value is formed from a preset threshold value and a correction parameter. | 12-25-2014 |
20150012151 | POWER SUPPLY DEVICE, MICRO SERVER HAVING THE SAME, AND POWER SUPPLY METHOD - A power supply device to supply power to a micro server includes a plurality of power supplies configured to be redundant and supply DC power, and an output unit to output the DC power output from the plurality of power supplies to the micro server, wherein one of the plurality of power supplies operates in a master mode and the remaining power supplies operate in a slave mode, and wherein if a load of the micro server is less than or equal to a first predetermined load, at least one of the power supplies that operate in the slave mode does not output the DC power. | 01-08-2015 |
20150019039 | LINE DROP COMPENSATION METHODS AND SYSTEMS - This disclosure is directed to regulating electric power at a node of a system for distribution of electricity. A voltage controller can identify properties of branch structures in a system that includes a voltage regulation device that controls a voltage source supplying electricity to nodes via the branch structures. The voltage controller can receive information on voltage and current associated with electricity provided by the voltage source. The voltage controller can receive, from a metering devices at nodes in the system, primary voltage information. The voltage controller can select one of the nodes based on the primary voltage information. The voltage controller can determine, based on the properties, an impedance for a branch structure corresponding to the selected node. The voltage controller can control the voltage regulation device based on the impedance for the branch structure corresponding to the selected node and the information on the voltage and the current. | 01-15-2015 |
20150045980 | Power Monitoring System and a Reduced Impedance Method for the Power Monitoring System - A power monitoring system comprises an input module, a plurality of switches, a plurality of power supply ports, a detecting module, a control module, and a wireless transmission module. The each switch was set in between the input module, and each switch has an address. The detecting module generates a power loading value by set in between the input module and each power supply port. The control module connects to switches, the detecting module and the wireless transmission module, thus, the control module can read the power loading values from the detecting module, and control each switch which corresponds to the address by a preset rule or a command from the wireless transmission module. It will not only save energy but also improve the electricity security for the household. | 02-12-2015 |
20150051750 | IMPEDANCE TUNING - The disclosure features wireless power transfer systems that include a power transmitting apparatus configured to wirelessly transmit power, a power receiving apparatus connected to an electrical load and configured to receive power from the power transmitting apparatus, and a controller connected to the power transmitting apparatus and configured to receive information about a phase difference between output voltage and current waveforms in a power source of the power transmitting apparatus, and to adjust a frequency of the transmitted power based on the measured phase difference. | 02-19-2015 |
20150066233 | POWER MANAGEMENT APPARATUS AND MULTI-SOURCE ENERGY HARVESTING SYSTEM USING THE SAME - Disclosed is a power management apparatus and a multi-source energy harvesting system using the apparatus, which manage power supplied by individual harvesting sources without wasting the power, thus efficiently distributing the power to a battery. The power management apparatus includes a plurality of comparison units configured to compare voltages of storage devices respectively connected to output terminals of a plurality of harvesting power sources with a preset threshold voltage. A control unit is configured to control an operation of the power management apparatus. A plurality of switching units are installed between the storage devices and a battery and are configured to be turned on/off in response to switching control signals output from the control unit and to form power transmission paths between corresponding storage devices and the battery. The control unit generates and provides the switching control signals based on output signals of the comparison units. | 03-05-2015 |
20150066234 | SYSTEM AND METHOD FOR MULTI-PHASE VOLTAGE REGULATION - In accordance with one embodiment of the present disclosure, a multi-phase voltage regulator may comprise a plurality of phases, each phase configured to supply electrical current to one or more information handling resources electrically coupled to the voltage regulator. A controller may be electrically coupled to the plurality of phases. The controller may designate at least one of the plurality of phases as a first state phase, and designate each of the plurality of phases not designated as a first state phase as a second state phase. The controller may alternate the designation of at least two of the plurality of phases between a first state phase and a second state phase. Each first state phase may be configured to supply a first electrical current regardless of electrical current demand. Each second state phase may be configured to supply a second electrical current based on the current demand. | 03-05-2015 |
20150081131 | Modular, Scalable, Multi-Function, Power Quality System For Utility Networks - A modular, scalable, multi-function, power quality system for utility networks includes a configurable frame coupled to an electrical input and an electrical output. A plurality of functional slots each including a receiving connector are coupled to the frame. One or more unique function subsystems are coupled to selected functional slots. Each unique function subsystem includes one or more electrical components coupled to the receiving connector of selected functional slots configured to define functional capability associated with the one or more functional slots. A plurality of identical power modules are disposed in selected functional slots of each of the one or more unique function subsystems. A controller coupled to each of the power modules is configured to enable the power modules in predetermined functional slots of the one or more unique subsystems to perform a predetermined function associated with the electrical input or the electrical output. | 03-19-2015 |
20150094874 | ELECTRIC POWER SYSTEM CONTROL WITH MEASUREMENT OF ENERGY DEMAND AND ENERGY EFFICIENCY USING T-DISTRIBUTIONS - A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of voltage measurement using paired t statistical analysis applied to calculating a shift in average usage per customer from one time period to another time period for a given electrical use population where the pairing process is optimized using a novel technique to improve the accuracy of the statistical measurement. | 04-02-2015 |
20150100174 | PASSIVE COMPONENT WITH TEMPERATURE COMPENSATION AND ELECTRONIC DEVICE USING THE SAME - A passive component with temperature compensation and an electronic device using the same are provided. The electronic device includes a central processor unit (CPU), a filter and a power conversion circuit. The filter includes the passive component and a variable resistor. The passive component includes an inductor and a negative temperature coefficient (NTC) resistor. The NTC resistor is contacted with a surface of the inductor, and the NTC resistor and the inductor are disposed in a package. The power conversion circuit provides a current information to the CPU according to a partial voltage difference of the filter. The power conversion circuit controls an output voltage through the filter according to a first control signal of the CPU, so as to provide the output voltage. The electronic device further includes an embedded controller. The embedded controller controls the variable resistor according to a second control signal of the CPU. | 04-09-2015 |
20150100175 | POWER DEMAND ADJUSTMENT SYSTEM, POWER DEMAND ADJUSTMENT METHOD, AND POWER ADJUSTMENT APPARATUS - A voltage control apparatus controls a voltage value of power that is supplied to a consumer from either a distribution substation or a pole-mounted transformer. A power management apparatus calculates an adjustable amount of demand for enabling power demand from a plurality of consumers to be adjusted, and sends the adjustable amount of demand to a demand adjustment plan management apparatus. The demand adjustment plan management apparatus prepares a demand adjustment plan for satisfying a request value for the amount of demand adjustment, and sends the demand adjustment plan to the power management apparatus. The power management apparatus, on the basis of the demand adjustment plan, prepares a voltage control plan for controlling the output voltage value of the voltage control apparatus, and causes the output voltage value of the voltage control apparatus to be controlled in accordance with the voltage control plan. | 04-09-2015 |
20150112502 | LOW DROP-OUT VOLTAGE REGULATOR MODELING SYSTEMS AND METHODS - A specialized low drop-out voltage regulator (LDO) computer system stores a generalized base model of an LDO. The base model includes values representing a circuit topology and a set of analog behavior blocks associated with the generalized LDO. Values of a set of operational parameters associated with a specific model of LDO are input to the specialized LDO computer system from a data sheet associated with the specific model of LDO. The specialized LDO computer system transforms the set of operational parameters into a computer model of the specific LDO. The LDO-specific computer model is output as a netlist or as a set of instantiation control values to control external hardware such as an integrated circuit die tooling system or a computer graphical display system. | 04-23-2015 |
20150120078 | ELECTRIC POWER SYSTEM CONTROL WITH PLANNING OF ENERGY DEMAND AND ENERGY EFFICIENCY USING AMI-BASED DATA ANALYSIS - A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of an energy planning process (EPP) system which can be used to plan a voltage control and conservation (VCC) system applied to an electrical distribution connection system (EEDCS). The EPP system plans modifications to the EEDCS as a result of operating the VCC system in the “ON” state, in order to maximize the level of energy conservation achieved by the VCC system control of the EEDCS. The EPP system may also identify potential problems in the EEDCS for correction. | 04-30-2015 |
20150301545 | CIRCUIT AND METHOD FOR CONTROLLING STANDYBY POWER CONSUMPTION - A circuit for controlling standby power consumption is disclosed. The circuit includes a main power supply, a transformer, a first switch transistor, a load, a low frequency divider circuit, and a signal generation unit. The transformer connects to one end of the signal generation unit and an input end of the low frequency divider circuit. The signal generation unit transmits the level signals to the low frequency divider circuit according to the operating mode and obtains the power supply voltage of the transformer. The second frequency of the low level signals is greater than the first frequency of the high level signals. The source of the first switch transistor connects to a load to obtain the frequency of the output signals to be operating frequency so as to control the turn-on duration of the transformer. So the power supply voltage in the standby mode and the power consumption are reduced. | 10-22-2015 |
20150310331 | Rule-Based Register Checking for Digital Voltage Regulator Controllers - A method of rule-based register checking for a digital voltage regulator controller includes: defining register settings for the digital voltage regulator via a GUI (graphical user interface) based controller parameter configuration system; accessing a rule-based checker by the GUI based configuration system to check for rule violations in the register settings; and uploading the register settings from the GUI based configuration system to the digital voltage regulator controller after checking the register settings for rule violations. A non-transitory computer readable medium storing a computer program operable to implement the rule-based register checking is also provided. | 10-29-2015 |
20150311711 | POWER ROUTER, POWER NETWORK SYSTEM, POWER ROUTER OPERATION CONTROL METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM HAVING POWER ROUTER OPERATION CONTROL PROGRAM STORED THEREON - A power router is adequately managed or controlled to construct a power network system in which power cells are asynchronously connected with each other. A first leg ( | 10-29-2015 |
20150331435 | POWER SUPPLY DESIGN TOOL FOR POWER SUPPLY SYSTEM DESIGNS INCLUDING MULTI-CHANNEL REGULATORS - A method (and system) includes receiving, at a computing device including a design tool application, design parameters indicative of a plurality of power supply loads to be powered. The method further includes generating power supply solutions that do not include multi-channel voltage regulators and generating power supply solutions that do include multi-channel voltage regulators. The method also includes ranking all power supply solutions and providing the ranked power supply solutions to a user. | 11-19-2015 |
20150378380 | SYSTEM AND METHOD FOR SYNCHRONIZING MULTIPLE GENERATORS WITH AN ELECTRICAL POWER DISTRIBUTION SYSTEM - Systems and method for synchronizing power generators with a power grid are provided. One system among various implementations includes a plurality of synchronization modules, wherein each synchronization module corresponds to one power generator. The synchronization modules are configured to output a control signal to adjust a frequency of the respective power generator to correspond with the frequency of the existing power grid. The system also includes a central controller in communication with the plurality of synchronization modules. The central controller is configured to determine a propagation delay with respect to each synchronization module. The propagation delay is a measure of time for a signal to propagate from the respective synchronization module to the central controller. The central controller is further configured to send a control signal to each synchronization module to control when each synchronization module connects the respective power generator to the existing power grid. | 12-31-2015 |
20160018833 | Calibration of Voltage Regulator - A voltage regulator calibrator analyzes voltage regulator output and compares the output with known electrical loads. The calibrator selects a known electrical load, applies the known electrical load to a voltage regulator, receives from the voltage regulator measured output power characteristics of the voltage regulator, compares the known electrical load with the measured output power characteristics, and generates a voltage regulator adjustment value based on the compared values. Embodiments of the present disclosure also include a method for calibrating, the method including selecting a known electrical load, applying the known electrical load to a voltage regulator, receiving measured output power characteristics of the voltage regulator, comparing the known electrical load with the measured output power characteristics, and generating a voltage regulator adjustment value based on the compared values. | 01-21-2016 |
20160026202 | SWITCHING REGULATOR OVERLOAD DETECTOR - A method, apparatus, and device provide for the detection of the adequacy of the current sourcing capability of a power source. The current sourcing capability of the power source is dynamically detected by sampling comparison values obtained during one or more sampling sub-windows and determining a sample density of comparison values. In response to the sample density of comparison values crossing a selectable density threshold, an insufficient-supply indication is generated. | 01-28-2016 |
20160028235 | Distributed Reactive Power Control in Power Distribution Systems - A method regulates voltages of a power distribution system that includes a substation transformer, at least one distributed energy resource (DER) for generating reactive power into the power distribution system, at least one DER controller operatively connected to the DER for controlling an amount of the generated reactive power, and a monitoring controller for monitoring a voltage violation on at least one phase of a monitored bus. The method determines an amount of reactive power required to compensate a voltage violation on the monitored bus using equivalent impedances of a path of the power distribution system between the substation transformer and the monitored bus and a shift of phase angle on the path, and transmits a request to provide the reactive power to compensate the voltage violation. | 01-28-2016 |
20160036229 | SYSTEM AND METHOD FOR CONTROLLING A POWER DISTRIBUTION NETWORK - An electrical power system includes an electrical power distribution network and a control device configured to regulate at least one attribute of said electrical power system. The electrical power system further includes a processor coupled to the control device configured to identify an out-of-bound condition on said electrical power distribution network at a first time. The out-of-bound condition is associated with the at least one attribute. The processor is also configured to determine a trend for the at least one attribute at a second time that is later than the first time after a predetermined delay time elapses. The trend indicates a direction away from at least one of a predetermined range and a predetermined value. The processor is also configured to transmit a control action to said control device based at least in part on the trend. | 02-04-2016 |
20160091961 | RACK SERVER SYSTEM - A rack server system is provided. When a power source supplied to the rack server system is normal, a part of the power source is supplied to a management module in the rack server system and the other part of the power source charges the energy storage component. When the power source supplied to the rack server system is abnormal, the power source will be blocked and not be supplied to the management module, thereby preventing the rack server system from operating abnormally. In stead of the power source, the electricity stored in the energy storage component is supplied to the management module. Herein, the management module also records this situation as the state information about the rack server system whereby the rack server system can be managed according to the state information. | 03-31-2016 |
20160094031 | METHOD, CONTROLLER, AND COMPUTER PROGRAM PRODUCT FOR CONTROLLING A VOLTAGE IN A POWER GRID - For controlling a voltage in a power grid including a PV bus and a PQ bus, a first tolerance range for an active power of the PV bus and a second tolerance range for an active power of the PQ bus are received. A first value for a reactive power of the PQ bus is received. With that, a robust optimization process is run for a set of power flow equations. The first and second tolerance ranges and the first reactive power value are input to the robust optimization process using the first and second tolerance ranges as robust optimization uncertainty. With that, the robust optimization process determines a voltage set point for the PV bus so that the set of power flow equations is fulfilled for the first and second tolerance ranges. According to the determined voltage set point, a voltage at the PV bus is controlled. | 03-31-2016 |
20160099566 | Method For Controlling Power Distribution - Embodiments of the present invention produce and define a relationship between local voltage and power measurements at a node of an electrical network and system conditions on a remote branch of the network. These local measurements are used to determine an optimal voltage set point at the node that, if realised by a reactive power resource, would affect the flow of reactive power or line current at one or more particular remote branches of the power system in a manner captured by the derived relationship. The change in reactive power required to obtain this voltage set point is also calculated based on local measurements. | 04-07-2016 |
20160105030 | BUS CONDITIONER FOR AN AIRCRAFT POWER SYSTEM - A bus conditioner for an electrical power system having at least one bus couplable to an electric power generation device driven by a prime mover includes a first energy storage device, a bi-directional power converter including a first converter input electrically connected to the first energy storage device and a converter output for connection to the bus, and a controller operatively coupled to the bi-directional power converter. The controller is configured to maintain a substantially constant load on the power generation device by commanding the power converter to divert excess power into the first energy storage device or use energy from the first storage device to provide power to the bus. | 04-14-2016 |
20160164290 | ELECTRIC POWER SYSTEM CONTROL WITH MEASUREMENT OF ENERGY DEMAND AND ENERGY EFFICIENCY - A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of voltage measurement using paired comparison analysis applied to calculating a shift in average usage per customer from one time period to another time period for a given electrical use population where the pairing process is optimized using a novel technique to improve the accuracy of the measurement. | 06-09-2016 |
20160172855 | CONSTANT POWER SUPPLY FOR A RESISTIVE LOAD | 06-16-2016 |
20160172857 | TRANSFORMER-TYPE VOLTAGE CONTROLLER, REACTIVE-POWER-ADJUSTING-TYPE VOLTAGE CONTROLLER, AND POWER-DISTRIBUTION-SYSTEM VOLTAGE CONTROL SYSTEM | 06-16-2016 |
20160179116 | DISTRIBUTED ELECTRICAL MICROGRID CONTROL | 06-23-2016 |
20160181797 | SOLAR ARRAY SIMULATION USING COMMON POWER SUPPLIES | 06-23-2016 |
20160181813 | LOW VOLTAGE ENVIRONMENT CONTROLLER WITH POWER FACTOR CORRECTION FLYBACK POWER SUPPLY | 06-23-2016 |
20160204609 | SYSTEMS AND METHODS FOR VOLT-AMPERE REACTIVE CONTROL AND OPTIMIZATION | 07-14-2016 |
20160252921 | SWITCHING REGULATOR OVERLOAD DETECTOR | 09-01-2016 |
20180024582 | CONNECTION CHECK IN FIELD MAINTENANCE TOOL | 01-25-2018 |