Entries |
Document | Title | Date |
20080215261 | DESIGN STRUCTURE FOR ENHANCING YIELD AND PERFORMANCE OF CMOS IMAGING SENSORS - A design structure for replacing a defective pixels in a pixel array is presented. The design structure includes means for identifying a defective pixel in the pixel array, means for generating a code including information corresponding to the defective pixel row and column; means for decoding the information; and means for generating a signal that permanently identifies the defective pixel row and column based on the decoded information. The design structure further includes means for substituting data from the defective pixel with data from a functioning pixel disposed in a same row as, and next to, the defective pixel based on the generated signal. | 09-04-2008 |
20080249723 | INTELLIGENT, SELF-PROPELLED AUTOMATIC GRID CRAWLER HIGH IMPEDANCE FAULT DETECTOR AND HIGH IMPEDANCE FAULT DETECTING SYSTEM - A self-propelled, automated, autonomic grid crawler which, when attached to a wire, moves along the wire to sense conditions of the wire. The grid crawler includes a central processing unit (CPU), working memory, such as random access memory (RAM), persistent money, such as read only memory (ROM) and hard drive (HD), sensor electronics, a wireless interface, a location device, such as a global positioning satellite (GPS) receiver, motive power system, and a battery. The sensor electronics serves to sense various types of faults. The CPU analyzes the data from the sensor electronics using pre-analysis and pre-qualification algorithms, which are stored in the HD. Depending on the results of the analysis, the CPU transmits information to the central station, either directly or indirectly via mounted docking devices, that potentially indicates a fault including the location of the fault as determined by the GPS receiver. The pre-processing and pre-qualifying of the data at the autonomic grid crawler limits the amount of data that needs to be transmitted to the central station, thereby saving battery power. | 10-09-2008 |
20080255781 | TRANSDUCER ARRAY SELF-DIAGNOSTICS AND SELF-HEALING - A method of performing transducer self-diagnostics and self-healing on an array of sensor transducers bonded to a structure for health monitoring includes measuring impedance to detect whether a transducer is missing, or a connection is damaged. Pitch-catch signals generated between one or more pairs of transducers are analyzed for detecting defects according to selected criteria of defect size and location to determine whether the sensors are damaged or partially/fully disbanded. Based on the resulting map of operational transducers, signal transmission paths are added/extended between additional pairs of transducers to maintain inspection coverage of the structure according to the selected criteria. | 10-16-2008 |
20080262761 | APPARATUS FOR CREATING TEST PATTERN AND CALCULATING FAULT COVERAGE OR THE LIKE AND METHOD FOR CREATING TEST PATTERN AND CALCULATING FAULT COVERAGE OR THE LIKE - The method for creating a test pattern and calculating a fault coverage or the like of the present invention is characterized by creating bridging fault voltage information indicating a voltage of a bridging assumed on the wire derived from an output terminal of a cell, calculating a logical threshold of an input terminal of the cell, extracting bridging fault information on an adjacent wire pair, calculating a detection limit resistance value using the logical threshold, adding the detection limit resistance value to bridging fault voltage information, creating extended bridging fault voltage information, creating a bridging fault list including a bridging fault type based on the extended bridging fault voltage information, creating a test pattern based on the bridging fault list, judging whether or not a bridging fault can be detected through this test pattern, creating fault detection information and calculating a weighted fault coverage based on the fault detection information and bridging fault generation information. | 10-23-2008 |
20080288189 | ARC DETECTOR - A system and method for identifying an arcing event in electrical distribution equipment. The system includes memory for storing an arcing radio frequency characteristic indicative of an arcing event generated in electrical distribution equipment and a noise radio frequency characteristic indicative of background electrical noise and a sensor for detecting radio frequency signals resulting from the arcing event and propagating wirelessly from the electrical distribution equipment. The system also includes a processor for processing the radio frequency signals detected by the sensor to extract radio frequency characteristics from the detected signals and including a comparator for comparing the extracted frequency characteristics to the arcing radio frequency characteristic and the noise radio frequency characteristic stored in memory to identify occurrence of an arcing event. The system also includes an arc alarm generator for generating an arc fault signal indicative of the occurrence of the arcing event. | 11-20-2008 |
20080288190 | Systems and methods to determine an impedance mismatch - In a particular embodiment, a method is disclosed that includes receiving data related to a customer premise equipment (CPE) device and determining an impedance mismatch between a transmission line and the CPE device based on the received data. The method further includes initiating removal of a source of the impedance mismatch in response to determining the impedance mismatch. | 11-20-2008 |
20080319689 | System and method to locate common path distortion on cable systems - A system and method to range a distance to a source of CPD on a two-way cable system, comprises a fixed CW signal injected into a downstream signal path, a swept signal transmitted from a network analyzer, a mixer for generating an up-converted swept signal, and a source of CPD in the two-way cable system that mixes the fixed CW signal and the swept signal to create an upstream swept signal. The network analyzer receives the upstream swept signal and determines a complex frequency response created by the source of CPD. An impulse response is determined from the complex frequency response, and the distance to the source of CPD is determined from the impulse response. | 12-25-2008 |
20090012727 | Detecting Partial Discharge in High Voltage Cables - A method for detecting partial discharge events comprising analysing an output from the cable using one or more substantially shift invariant wavelet transforms, and using the analysed signal to identify one or more peaks associated with a partial discharge. Preferably, the shift invariant transform is a stationary wavelet transform (SWT). | 01-08-2009 |
20090030623 | SYSTEM AND METHOD OF DETERMINING THE AREA OF VULNERABILITY FOR ESTIMATION OF VOLTAGE SAGS AND COMPUTER-READABLE MEDIUM HAVING EMBODIED THEREON COMPUTER PROGRAM FOR THE METHOD - Provided is a system for determining the area of vulnerability for estimation of voltage sages including: a system information reader reading information on a power system; a unit for determining the area of vulnerability calculating a voltages at a target bus corresponding to ends of a fault line by using the system information and a first residual voltage equation that is a voltage relationship between points in the fault line in the power system where a fault is simulated and the target bus where a voltage change due to the fault occurs, calculating a voltage at the target bus corresponding to a point between the ends when the voltages at the target bus corresponding to the ends are not higher than a predetermined voltage threshold, deriving a second residual voltage equation that is an approximate quadratic interpolation equation for the first residual voltage equation by using the voltages at the target bus corresponding to the ends and the point between the ends of the fault line, calculating the voltage of the target bus corresponding to the point of the fault line by using the second residual voltage equation, and determining the point of the fault line corresponding to a voltage of the target bus equal to or lower than the predetermined voltage threshold as the area of vulnerability; and a result output unit outputting results of the determination of the area of vulnerability. | 01-29-2009 |
20090082979 | DEFECT ANALYZER AND DEFECT ANALYZING METHOD - A defect analyzer has a region dividing section configured to divide a defect analyzing region of a wafer into a plurality of grid squares, the wafer having a circuit pattern formed thereon, a pattern feature quantity extracting section configured to extract a pattern feature quantity based on design data of the circuit pattern for each of the grid squares, a region classifying section configured to classify the plurality of grid squares into a plurality of groups based on the pattern feature quantities, a defect coordinate matching section configured to match defect information having been detected in the defect analyzing region with the defect analyzing region, a defect size distribution calculating section configured to calculate a defect size distribution in each of the plurality of groups, a distribution comparing section configured to compare the defect size distribution and a predetermined estimation distribution in each of the plurality of groups and calculate a difference, and a region extracting section configured to output the defect information corresponding to the group having the difference equal to or smaller than the threshold value. | 03-26-2009 |
20090105971 | System And Method For Time Domain Reflectometry Testing - A TDR testing method comprises storing test data resulted from a TDR test applied on an electronic component, displaying the test data, identifying a distinctive portion of the test data corresponding to a defective location in the electronic component, modifying the distinctive portion of the test data, and computing the modified test data to verify whether a predetermined requirement is satisfied. | 04-23-2009 |
20090150099 | Method for fault location in electric power lines - A method for locating faults in three-terminal and multi-terminal power lines, applicable in electric power systems for overhead and underground cable transmission and distribution lines. The inventive method is characterised in that it measures current for fault and pre-fault conditions and in one terminal station of the system line phase voltage for fault and pre-fault conditions is measured, a hypothetical fault location is assumed, the distances to the hypothetical fault locations are calculated and fault resistance is calculated, the actual fault point is selected by first comparing the numerical values concerning the distances to the hypothetical fault locations and rejecting those results whose numerical values are negative or bigger than one in relative units, and then by analysing the values of the calculated fault resistances for the fault locations and rejecting those results of the calculations for which the value of fault resistance is negative, and if there is still more than one calculation result remains not rejected then performing selection of the valid result by analysing the values of the calculated respective equivalent source impedances. | 06-11-2009 |
20090177420 | Detection, localization and interpretation of partial discharge - In order to detect, localize and interpret a partial discharge occurring in a partial discharge site along an electrical equipment, two measurement probes and a synchronization probe are installed along the electrical equipment. The measurement probes detect pulses travelling in the electrical equipment while the synchronization probe detects a phase angle in the electrical equipment and is usable for calibration purposes. A control unit receives the signals sensed by the probes and conditions them. Digital processings applied on the conditioned signals, involving their correlation, a time-frequency distribution and a form factor estimation, allows establishing a diagnosis indicating a detection of a partial discharge and its localization along the electrical equipment. | 07-09-2009 |
20090248328 | Method and apparatus for detecting partial discharges in electrical systems - A method of detecting partial discharge associated with at least a portion of an electrical system, wherein the electrical system includes at least one electrical machine electrically coupled within the electrical system, includes generating an electromagnetic field within the electrical machine. The method also includes collecting partial discharge data from at least a portion of the electrical system. The method further includes determining a first partial discharge inception voltage (PDIV) value of at least a portion of partial discharge activity within the electrical system. The method also includes generating at least one trending comparison of the first PDIV value and at least one second PDIV value of at least a portion of partial discharge activity within the electrical system. The method further includes outputting the results. | 10-01-2009 |
20090248329 | ARC FAULT ROOT-CAUSE FINDER SYSTEM AND METHOD - The present invention is directed to an arc fault root-cause finder apparatus and method for determining the root-cause of an arc fault condition. In one embodiment, the arc fault root-cause finder apparatus has a sensing base module mounted to a load panel box having at least one circuit breaker that protects a corresponding branch circuit. The sensing base module has sensing electronics that are electrically connected to the at least one circuit breaker and are configured to sense the occurrence of arcing events in the branch circuit. The sensing base module includes wireless communication electronics to (i) effect transmission of electrical signals that provide information about the occurrence or absence of arcing events in the branch circuit, and (ii) to receive command signals. The arc fault root-cause finder apparatus also has a remote user interface module that has wireless communication electronics configured to establish communication with the sensing base module so as to receive signals transmitted by the sensing base module and to transmit control signals to the sensing base module. The remote user interface module has a visual display device to display information received from the sensing base module about the branch circuit. | 10-01-2009 |
20090265122 | System and Method for Locating and Analyzing Arcing Phenomena - System and method for detecting partial discharge arcing phenomena in a power network distribution system which employs a mobile receiving assemblage including a wideband antenna, a computer controllable wideband radio receiver deriving an amplitude detected output and a global positioning system providing system position data. The amplitude detected outputs are digitized and treated with a digital signal processor based analysis including fast Fourier transforms extracting narrowband signal frequencies that are harmonically related to the network fundamental frequency. The narrowband signal frequencies are analyzed for peak amplitudes which are summed to derive maintenance merit values related to the arcing phenomena. | 10-22-2009 |
20100063754 | WIRE FAULT ILLUMINATION AND DISPLAY - A computer implemented method, apparatus, and computer usable program product for illuminating faults in a wiring system. The wiring system is monitored for a fault during operation of the wiring system. In response to detecting the fault, a location of the fault within the wiring system is estimated. A wiring diagram is presented for the wiring system with an indication of the location of the fault within the wiring system. | 03-11-2010 |
20100121585 | SYSTEMS AND METHODS FOR LOCATING DEFECTIVE COMPONENTS OF A CIRCUIT - According to exemplary methods and systems of the present principles, the location of defective field repairable units (FRUS) of a circuit that have varying sizes or varying numbers of scan cells may be identified by employing tiles including scan cells from different FRUS. A set of test patterns may be scanned through the scan cells such that cells belonging to FRUs within a tile may be concealed while analyzing the response of scan cells in the tile contributed by a different FRU. Further, defective tiles are discoverable at any tile location and in any quantity within a maximal capacity using a compressed signature. In addition, signature registers that process data at a rate that is faster than the scan shift rate of the circuit may be employed during compression to multiply a circuit response by a plurality of components of a compression matrix during one scan shift cycle. | 05-13-2010 |
20100211338 | METHOD AND DEVICE FOR ANALYZING ELECTRIC CABLE NETWORKS USING PSEUDO-RANDOM SEQUENCES - The invention relates to a method and a device for analyzing electric cable networks in order to detect and locate defects in the cables comprising at least one branch connection from which N secondary sections extend. The method involves injecting into the network, at a plurality of injection points E, pseudo-random sequences of digital signals PNi(t) that are de-correlated from each other, and collecting, at one or more observation points Sj, composite time signals Rj(t) generated by the circulation of the output sequences and the reflections thereof in the impedance discontinuities of the network. The correlation between the composite signals and the time-offset pseudo-random sequences is then computed, and the positions of correlation peaks are sought to deduce therefrom the positions of defects in the network by taking into account the signal propagation speed in the network. | 08-19-2010 |
20100211339 | DIAGNOSTIC METHOD FOR DETERMINING DEFORMATIONS IN A TRANSFORMER WINDING - A diagnostic method for determining deformations in a transformer winding comprising the steps of representing the winding as a lumped parameter circuit and dividing the winding into at least two sections; generating a first set of fingerprint values based on capacitive values of the winding; the first set of finger print values indicating the location and extent of radial deformation in the winding; generating a second set of fingerprint values based on capacitive values of the winding; the second set of finger prints indicating the location and extent of axial deformation in the winding and determining the location and extent of radial or axial deformation or combination of both radial and axial deformation in the winding by comparing the measured values with the first set and second set of finger print values. | 08-19-2010 |
20100217548 | Fault Region Location System - A method for identifying an approximate fault location in a power transmission line comprises detecting first and second dominant frequencies in first and second recovering voltages resulting from the fault without using the velocity of either of the recovering voltages. | 08-26-2010 |
20100235119 | LOGICAL SCHEME FOR SEVERE FAULT DETECTION - The present invention relates to a method for determining location of faults in a wind power plant comprising a first plurality of wind turbines arranged in n groups, each group comprising m | 09-16-2010 |
20100241374 | Failure analysis method, apparatus, and program for semiconductor integrated circuit - There are provided a signal detection process that derives coordinates in a device coordinate system in analysis data for abnormal signal data included in the analysis data of a semiconductor integrated circuit obtained from a semiconductor inspection apparatus; a coordinate conversion process that derives a correspondence between a coordinate in the device coordinate system and a coordinate in a design coordinate system in the design data of the semiconductor integrated circuit for a plurality of reference points in the semiconductor integrated circuit, and that derives a coordinate conversion formula between the device coordinate system and the design coordinate system; an error calculation process that derives a position error between a coordinate in the device coordinate system converted by the coordinate conversion formula and a coordinate in the design coordinate system; and a circuit extraction process that extracts a circuit related to the abnormal signal in the design data based on the coordinates of the abnormal signal in the device coordinate system using the coordinate conversion formula and the position error. | 09-23-2010 |
20100312506 | DISTANCE-TO-FAULT MEASUREMENT SYSTEM CAPABLE OF MEASURING COMPLEX REFLECTION COEFFICIENTS - Techniques are disclosed for computing distance-to-fault (DTF) in communication systems. The techniques can be embodied, for instance, in a DTF system that provides a multi-port probing device and DTF functionality, including computing distances to faults and the fault magnitudes. In addition, the DTF system is further configured with the ability to accurately measure complex reflection coefficient of the UUT, and/or return loss of the UUT. The complex reflection coefficient and/or return loss of the UUT can be computed as a function of known scattering parameters of a multi-port measurement circuit included in the probe of the DTF system. | 12-09-2010 |
20100332163 | METHODS, DEVICE AND INSTALLATION FOR LOCATING A DEFECT IN AN ELECTRIC LINK - A method for detecting a defect in an electric link, which transmits, at a first moment, an electric signal having a predetermined propagation speed from an end of the electric link, and detects, at a second moment, reception of an echo of the electric signal. The method further establishes a model of the variation of the electric signal propagation speed in the electric link on the basis of the length of the link through which the signal flows, and estimates a first location of the defect based on the difference between the first and second moments, on the predetermined propagation speed at the start, and on the speed variation model in the link. | 12-30-2010 |
20110015882 | METHOD FOR IMPROVING FAULT DETECTION AND POSITIONING PRECISION USING REFLECTOMETRY IN A WIRED ELECTRICAL NETWORK - This invention relates to a method for detecting and determining the position of faults using reflectometry in a wired electrical network comprising the following steps:
| 01-20-2011 |
20110029263 | CONDUCTOR APPARATUS, SYSTEM, AND METHOD OF DISPLAYING WHETHER A NUMBER OF CONDUCTORS CONDUCT CURRENT - An apparatus is for a conductor capable of conducting a current. The apparatus includes a global positioning system device structured to determine location of the global positioning system device, a coupling device structured to couple the global positioning system device to the conductor, and a power supply structured to power the global positioning system device responsive to a current conducted by the conductor. The global positioning system device is further structured to wirelessly communicate the determined location when powered by the power supply responsive to the current conducted by the conductor. The global positioning system device does not wirelessly communicate when current is not conducted by the conductor. | 02-03-2011 |
20110054813 | DEVICE FOR MONITORING THE STRUCTURE OF A VEHICLE - A device for monitoring the structure of a vehicle, including an electric measurement sensor, a processing circuit connected to the sensor for converting the sensor measurements into monitoring data, and a transmitter for transmitting the monitoring data to a collecting member, wherein the processing circuit is miniaturised and has a small size so as to be contained within a cube measuring 40×40×40 mm or less, is connected to the sensor by a short wired electrical connection, the length of which measures less than 200 mm, includes an onboard battery, and includes a radio means for transmitting the monitoring data to a mobile collecting member temporarily located in the vicinity thereof. | 03-03-2011 |
20110082653 | METHOD FOR FAULT LOCATION ON SERIES COMPENSATED POWER TRANSMISSION LINES WITH TWO-END UNSYNCHRONIZED MEASUREMENT - The present invention is concerned with a method for fault location in series compensated power transmission lines with two-end unsynchronized measurement, finding an application in the electrical power sector and for overhead uncompensated and series-compensated transmission lines. The method according to the invention wherein a distance to fault and fault resistance are determined by means of voltages and current values, measurement in the stations (A) and (B), before and after occurrence of the fault ( | 04-07-2011 |
20110144931 | METHOD AND APPARATUS FOR HIGH-SPEED FAULT DETECTION IN DISTRIBUTION SYSTEMS - A method and apparatus for high-speed fault detection of circuits in power distribution networks utilizing protective relay devices ( | 06-16-2011 |
20110153235 | Wire System Assessment - The advantageous embodiments provide a method, a computer program product, and an apparatus for monitoring a wiring system. A number of responses to signals transmitted in a portion of the wiring system are measured to form a measured signature. Design data for the portion of the wiring system is retrieved. A number of expected responses for the signals in the portion of the wiring system are identified using the design data to form a computed signature. The measured signature is compared with the computed signature. | 06-23-2011 |
20110153236 | ELECTRICAL ANOMALY DETECTION METHOD AND SYSTEM - There are provided a method and a system for real time monitoring of a powered on electrical network in a facility in order to detect an electrical anomaly while the electrical network is in use. The system comprises a sensor data receiver for receiving real time sensor data including at least one measured value measured in real time by at least one sensor installed on a conductor of the electrical network in the facility while the electrical network is in use; an anomaly detector for retrieving an anomaly detection rule from an anomaly detection rule database, the rule having an identification of a required input, a formula, and a threshold reference value, for a detection of an anomaly; receiving the real time sensor data from the sensor data receiver and extracting at least one relevant measured value from the at least one measured value using the identification of the required input; comparing the at least one relevant measured value to the threshold reference value according to the formula to determine one of a presence and an absence of the anomaly in the real time sensor data; an event generator controlled by the processor for retrieving and providing anomaly monitoring data if the anomaly is determined to be present by the processor, the anomaly monitoring data including an indication of a monitoring course of action to be carried out to address the anomaly determined to be present. | 06-23-2011 |
20110178741 | METHOD AND DEVICE FOR FAULT LOCATION OF SERIES-COMPENSATED TRANSMISSION LINE - A transmission line system, a device for fault protection and computer programs, and a method for locating a fault in a series-compensated two-terminal power transmission line including a compensating bank for providing series-compensation to the transmission line. Different subroutines are utilized for locating faults on line segments from the first terminal to the compensating bank and line segments from the second terminal to the compensating bank. A selection is then made in order to determine a valid result. The subroutines utilize three phase currents synchronized measurements from both terminals and a three phase voltage measurements from one terminal for determining the respective per unit distance to a fault. | 07-21-2011 |
20110184673 | METHOD AND DEVICE FOR FAULT LOCATION - A method for fault location is provided which can accurately perform a fault location process by a simple and direct calculation without requiring no synchronization of terminals. Data relating to the voltage and the current (vector quantity) at opposite ends of a power transmission line section to be located and a transmission line constant set in advance are used. When the distance x from a designated terminal A to a fault point F is an unknown quantity, the distance x can be calculated by solving a quadratic equation obtained by taking as the fault point a point where values of the second power of a fault point voltage in a fault phase when viewed from opposite ends of the section to be located are equal to each other. | 07-28-2011 |
20110313692 | Enhanced Intelligent Patch Panel Diagnostic Management - A system and method for enhanced intelligent patch panel diagnostic management. Physical layer device technology can be implemented into a patch panel to perform diagnostics of a communication channel. This diagnostic information (e.g., length of cable, location of cable fault, type of cable, etc.) can be displayed on a display of the patch panel management system to assist IT personnel. | 12-22-2011 |
20120004869 | SYSTEMS AND METHODS FOR POWER LINE EVENT ZONE IDENTIFICATION - Systems and methods for power line event zone identification are disclosed. Power line event zone identification may include receiving measured data corresponding to a signal measured on a power line, determining from the measured data that a power line event has occurred, and identifying a probable one of at least two monitoring zones in which the power line event occurred. The at least two monitoring zones may be defined for an Intelligent Electronic Device (IED). The systems may include an IED connected to the power line and a processor linked to the IED. | 01-05-2012 |
20120022809 | DEVICE AND METHOD FOR LOCATING PARTIAL DISCHARGES - A method for locating partial discharges occurring at a discharge site ( | 01-26-2012 |
20120022810 | DEVICE AND METHOD FOR LOCATING PARTIAL DISCHARGES - A method for locating partial discharges occurring at a discharge site ( | 01-26-2012 |
20120035870 | METHOD AND APPARATUS FOR MEASURING A PARAMETER OF A VEHICLE ELECTRICAL SYSTEM - An apparatus for measuring electrical parameters for an electrical system measures a first and second parameters of the electrical system between connections to the electrical system. A processor determines a third electrical parameter of the electrical system as a function of the first parameter and the second parameter. Wireless communication is provided between components of the apparatus. | 02-09-2012 |
20120072139 | Computer-implemented systems and methods for detecting electrostatic discharges and determining their origination locations - Computer-implemented systems and methods for detecting ESD on a surface and determining an origination location of the ESD. A programmed computer device monitors time-varying current data related to the surface to detect ESD on the surface. The current profile for the surface may be compared to a catalog of ESD current profiles, where each ESD current profile in the catalog corresponds to a different location on the surface. The location on the surface whose corresponding ESD current profile best matches the actual current profile from the ESD may be determined to be the origination location of the ESD. Moderately different processes may be used to determine the ESD origination location depending on whether the surface is symmetrical or irregular, flat or curved, etc. | 03-22-2012 |
20120116697 | Leakage Location Methods - “Cradle-to-grave” treatment of leaks begins with technicians logging leakage signal strengths and GPS latitude and longitude coordinates in technicians' vehicles as the technicians go about their daily assignments. Leakage signal strengths and GPS latitude and longitude coordinates are then uploaded to a leakage server. The server calculates leak latitude and longitude coordinates and signal strengths. The system sends the leakage signal strengths and/or calculated leak latitude and longitude coordinates to technicians' vehicles, for example, as components of, or attachments to, work orders. The latitudes and longitudes are converted by GPS navigators in the technicians' vehicles to turn-by-turn directions to the calculated leak locations. The technicians drive to the leaks, identify and repair them, and close the work orders. | 05-10-2012 |
20120143533 | PARTIAL DISCHARGE DETECTION DEVICE CAPABLE OF DETERMINING THE EXTERNAL OR INTERNAL ORIGIN OF A PARTIAL DISCHARGE, AND ASSOCIATED METHOD - The invention relates to detection apparatus for detecting a partial discharge from live electrical apparatus, the detection apparatus comprising detection means (Pc) mounted on the live electrical apparatus (T) for the purpose of detecting the occurrence of at least one partial discharge, wherein said detection apparatus further comprises additional means (D | 06-07-2012 |
20120221263 | FAULT LOCATION METHOD AND SYSTEM - According to an embodiment, a fault point location method of locating a fault point by using a voltage and a current of each terminal of a transmission line to be located and a transmission line constant is disclosed. According to the method, a formula simplified by a secondary approximation using an approximation of a hyperbolic function from a basic equation of a distributed constant circuit equation using the hyperbolic function or a formula simplified by a division of both sides by the hyperbolic function is determined. A location distance from a predetermined end of the transmission line to the fault point is calculated by using the simplified formula. | 08-30-2012 |
20120259563 | ONLINE MONITORING SYSTEM AND METHOD TO IDENTIFY SHORTED TURNS IN A FIELD WINDING OF A ROTOR - A method for analyzing electrical shorts in field windings of a synchronous machine having a rotor using a magnetic flux probe, the method includes: monitoring flux signals generated by the flux probe wherein the flux signals are indicative of magnetic flux emanating from the field windings; electronically storing flux data obtained from the monitored flux signals and indicative of electrical shorts in the field windings; automatically analyzing the stored flux data to identify field windings having the shorts and to count the shorts in each identified field winding, and automatically displaying information identifying the field windings with shorts and a number of shorts in each field winding. | 10-11-2012 |
20120265458 | Corona and Partial Discharge Diagnostic Device and Method for Using the Same - A method for diagnosing a fault in an electrical component using a diagnostic system having a plurality of sensors. The method includes positioning the electrical component in a predetermined position adjacent the diagnostic system and at a predetermined orientation with respect to the diagnostic system. The method also includes causing a predetermined level of electrical current to flow to the electrical component, the stationary sensors sensing electrical discharge emitted by the electrical component at an area of the fault, and the tangible computerized controller receiving sensor data from the sensors. The method further includes the tangible computerized controller executing the computer-readable instructions to process the sensor data to generate test information including a location of the electrical component at which the fault is occurring in at least two dimensions. | 10-18-2012 |
20120271573 | SYSTEMS AND METHODS FOR RECONFIGURING AN ULTRASOUND DEVICE - Systems and methods (the “utility”) presented herein provide for the assessment of acousto-electrical probes, such as their connections (e.g., transducer leads) and their response characteristics. For example, the utility may provide for readily evaluating transducer leads that have been broken and/or detached from transducers within an ultrasound probe. Due to the increasing complexity of ultrasound probes, identification of broken and/or detached transducer leads also becomes increasingly complex. Being able to identify such disconnected transducer leads may enable a person to repair, or “reterminate”, these transducer leads leading to a potentially substantial cost savings, the least of which being incurred by avoiding total replacement of an ultrasound probe. | 10-25-2012 |
20120278013 | SYSTEM AND DEVICE FOR DETECTING DEFECTS IN UNDERGROUND CABLES - A system and device for detecting insulation defects in a cable are provided. The system and device include using signals received from sensors to detect a partial discharge caused by insulation defects in a cable. The system is passive, without signals being injected into system cables, and may use one or more sensors, data acquisition systems, gateway devices, and monitoring stations and is based on detecting partial discharge from insulation defects and reporting the detection when it occurs. | 11-01-2012 |
20120323507 | FAULT DETECTION APPARATUS AND FAULT DETECTION METHOD - According to one embodiment, an apparatus includes an first storage unit to store a value output by a communication unit, a second storage unit to store positional data indicating a place the modules, an third storage unit to store an output model indicating the relationship between a sunshine condition and an electrical output, a estimation unit to estimate a sunshine condition for each module based on the value and the output model, a forth storage unit to store the sunshine condition estimated, a correction unit to correct the sunshine condition, and a detection unit to calculate an expected electrical output for each module based on the corrected sunshine condition and the output model, and to detect a fault in the modules. | 12-20-2012 |
20130035883 | SYSTEMS AND METHODS TO MONITOR THE OPERATION OF A POWER GENERATION SYSTEM - A monitoring system is provided. The monitoring system includes at least one sensor that is configured to detect at least one fault within a power generation system. Moreover, the monitoring system includes a computing device that is coupled to the sensor. The computing device includes an interface that is configured to receive a signal representative of the fault. The computing device also includes a processor that is programmed to identify a location of the fault by considering a plurality of potential fault locations and the processor is programmed to determine at least one restoration solution to restore the fault by considering a plurality of potential restoration solutions. | 02-07-2013 |
20130046491 | IN-LINE ANALYZER FOR WAVELET BASED DEFECT SCANNING - A method and system for providing simultaneous localization of defects in both the time and frequency domain. A high frequency repeating pattern is written on media, and the pattern is read to generate a readback signal, which is converted into ADC samples. The ADC samples are analyzed, in-line, to determine the type of wavelet, level of decomposition, and threshold level for a wavelet transform of the particular readback signal. The wavelet transform provides details and/or approximations (wavelet coefficients) that are analyzed to determine the type, location, and duration of any identified defects. Any noise in the details and/or approximations (wavelet coefficients) is removed by a wavelet based denoising operation. Flags indicating the type, location, and duration of any defects are generated so that the defects may be mapped. | 02-21-2013 |
20130054161 | Cell-Aware Fault Model Generation For Delay Faults - Cell-aware fault models for delay faults are created for library cells. Analog one-clock-cycle fault simulations are first performed on a transistor-level netlist of a cell to identify type one detectable defects and type two detectable defects in defects of interest. The type one detectable defects are detectable by one-clock-cycle testing and their fault models may be created based on results of the analog one-clock-cycle fault simulations. The type two detectable defects are defects for which two-cycle detection conditions may be calculated from corresponding results of the analog one-cycle fault simulations. Analog two-clock-cycle fault simulations are then performed for the rest defects in the defects of interest to determine type three detectable defects and their detection conditions. The created cell-aware fault models may be used to generate cell-aware test patterns. | 02-28-2013 |
20130054162 | METHODS AND APPARATUS FOR DETERMINING CONDITIONS OF POWER LINES - Techniques for determining conditions of power lines in a power distribution system based on data collected by a plurality of sensor units deployed in the power distribution system. The techniques include obtaining data associated with measurements collected by at least two sensor units in the plurality of sensor units, and determining, by using at least one processor, at least one condition of at least one power line in the power distribution system by using the data obtained by the at least two sensor units. | 02-28-2013 |
20130060493 | SYSTEMS AND METHODS FOR USE IN MONITORING A POWER GENERATION SYSTEM - A monitoring system for use with a power generation system is provided. The monitoring system includes a plurality of sensors that include at least one sensor that is configured to detect an interruption of an electromagnetic field within the power generation system, wherein the interruption of the electromagnetic field corresponds to at least one fault within the power generation system. The monitoring system also includes a computing device that is coupled to the sensor. The computing device includes an interface configured to receive a signal representative of the interruption of the electromagnetic field. A processor is coupled to the interface and programmed to identify a location of the sensor to enable the identification of a location of the fault. | 03-07-2013 |
20130096854 | Fault Location Using Traveling Waves - Disclosed herein are various embodiments of systems and methods for calculating a fault location in electric power delivery system based on a traveling wave created by an electrical fault in the electric power delivery system. According to one embodiment, an intelligent electronic device may be configured to detect a transient traveling wave caused by an electrical fault. A first traveling wave value of the transient traveling wave may be determined and a corresponding first time associated with the first traveling wave may be determined. The IED may receive a second time associated with a second traveling wave value of the transient traveling wave detected by a remote IED. The distance to the remote IED may be known. An estimated fault location may be generated based on the time difference between the first time and the second time. Additional methods of calculating the fault location may also be employed. | 04-18-2013 |
20130096855 | Detection of an Abnormal Signal in a Compound Sampled Signal - A technique detects an abnormal signal in a compound sampled signal recorded in the time domain. The technique involves dividing the sampled signal recorded in the time domain into sample segments; transforming each of the sample segments from the time domain into the frequency domain to determine transformed segments, each transformed segment having frequency points, each frequency point having an amplitude associated with a certain frequency; for a frequency point in a given transformed segment, determining a ratio by dividing the amplitude of the frequency point by a value indicative of an average of the amplitudes of the frequency points at the same frequency across transformed segments; repeating the determination of a ratio for frequency points in each transformed segment to determine ratios for each transformed segment; repeating the determination of ratios for transformed segments; and using the ratios to detect the abnormal signal in the compound sampled signal. | 04-18-2013 |
20130103329 | REDUCING IMPACT OF A REPAIR ACTION IN A SWITCH FABRIC - Techniques are disclosed for reducing impact of a repair action in a switch fabric. In one embodiment, a server system is provided that includes a first interposer card that operatively connects one or more server cards to a midplane. The first interposer card may include a switch module that switches network traffic for the one or more server cards. The first interposer card may be hot-swappable from the midplane, and the one or more server cards may be hot-swappable from the first interposer card. | 04-25-2013 |
20130124119 | FAULT LOCATION ON A DE-ENERGIZED POWER LINE SECTION - The locating of a fault on a de-energized power line section is carried out by measuring a reflection signal characterizing the fault and deriving from a voltage signal applied on the section. An application of the voltage signal and corresponding measurements of reflection signals are simulated with a model of the section for a fault located at different locations along the section. The simulated reflection signals are compared with the measured reflection signal. A location of the fault is located based on the location of the fault for the simulated reflection signal having a highest correlation with the measured reflection signal. | 05-16-2013 |
20130138367 | REMOTE POWER OUTAGE NOTIFICATION - Power outages and restorations at telecommunications subscribers' premises can be automatically detected and reported in a manner that is sensitive to subscriber privacy concerns. A server device receives, from a network terminal device installed at a subscriber premise, an alert that the network terminal device has lost primary power from a power grid. The server device determines a physical address of a location for the network terminal and associates the physical address of the network terminal location with particular power grid equipment. The server device determines whether a power outage of the power grid has occurred and outputs a notification of the power outage associated with the particular power grid equipment when the power outage is determined to occur. | 05-30-2013 |
20130179100 | SYSTEM FOR ANALYZING AND LOCATING PARTIAL DISCHARGES - A sensor detects partial discharges (PDs) in an electrical power system and generates a corresponding analog electrical signal. A data acquisition component receives the signal from the sensor and converts it to digitized zero span data for a series of uniformly spaced frequencies in a frequency spectrum of interest. A digital signal processing component receives the digitized zero span data, analyzes such data, and generates a corresponding phase resolved spectrum signal in three dimensional format including dimensions of amplitude, phase and frequency for each of the uniformly spaced frequencies. A display component receives the analyzed data stream from the processing component and actuates one or more displays from which characteristics of the PD can be identified, such as different types of PDs from different sources, and information on the location of a PD relative to the sensor. | 07-11-2013 |
20130191050 | METHOD OF LOCATING INTERNAL ARCING IN A GAS-INSULATED LINE AND AN ASSOCIATED DEVICE - A method and a device for locating internal arcing that occurs in a compartment (CP | 07-25-2013 |
20130191051 | DETECTION OF LOSS OR MALFUNCTIONS IN ELECTRICAL DISTRIBUTION NETWORKS - The invention proposes a method for detecting loss or malfunctions in a meshed electrical distribution network. The method comprises a step of receiving average measured voltage values and average measured current values associated with one or more points of supply within the electrical distribution network, and a step of receiving average measured voltage values and average measured current values associated with a plurality of points of consumption within the electrical distribution network. Furthermore, the method comprises the step of calculating first conductivity parameters based on said received average measured voltage values and average measured current values and the step of receiving further average measured voltage values and average measured current values associated with said points of supply within the electrical distribution network. Still further the method comprises the steps of receiving further measured average voltage values and average current values associated with said points of consumption within the electrical distribution network and analyzing said further received average measured voltages and average measured currents using said calculated conductivity parameters to detect any deviations of measured currents values from calculated currents values with respect to a given point of consumption or point of supply. | 07-25-2013 |
20130204555 | Method and Apparatus for Electrically Locating a Fault in a Cable - In order to locate a cable fault in a cable, a testing apparatus applies a test signal to the cable so as to induce an electrical oscillation. The testing apparatus includes a voltage source that generates the test signal, which e.g. ignites an electrical arc at the cable fault or applies a voltage surge to the cable, to cause the electrical oscillation. The apparatus further includes a measured signal evaluation device to measure the resulting oscillations in the time domain or the frequency domain, and carry out a spectral analysis in the frequency domain, so as to automatically determine the location of the fault preferably from the total phase rotation of the signal, the phase rotation of the reflection at the first cable end, the phase rotation of the reflection at the cable fault, and the imaginary part of the propagation constant of the signal in the cable. | 08-08-2013 |
20130211750 | METHOD FOR THE CONTINUOUS MONITORING AND DIAGNOSIS OF SOURCES OF PARTIAL DISCHARGES (PDs) IN HIGH VOLTAGE CABLES DURING CONNECTION TO, AND OPERATION IN THE POWER GRID, AND PHYSICAL SYSTEM FOR CARRYING OUT SAME - A method specially designed for detecting events associated with partial discharges (PDs) in high voltage cables includes the identification of the location and the evaluation of the amplitude and rate of repetition per period of the grid voltage, with the possibility of identifying different sources producing PD signals as a function of the location thereof and recognising the type of defect associated with PDs in the same location. Generated electric signals are measured and the discriminated in relation to the background noise. A system for carrying out the method includes devices for discriminating the noise in relation to the transient waveform of the PD, determining the parameters associated therewith, determining the map of sources of PDs along the length of the cable, graphically representing the sources, and identifying the patterns of the sources of PDs separated as a function of the location thereof along the length of the cable. | 08-15-2013 |
20130238264 | MEASUREMENT DEVICE FOR IDENTIFYING ELECTROMAGNETIC INTERFERENCE SOURCE, METHOD FOR ESTIMATING THE SAME, AND COMPUTER READABLE INFORMATION RECORDING MEDIUM ENABLING OPERATIONS THEREOF - With regard to EMC problems resulting from interference electromagnetic wave emitted from a subject electronic device, a source of interference electromagnetic wave is accurately located by measuring near-field electromagnetic wave emitted from the subject electronic device. The waveform of an electromagnetic wave received by an antenna under interference is compared with the waveform of an electromagnetic wave detected by a sensor, which moves across a vicinity of the subject electronic device, and when the temporal changes in amplitudes of these waveforms coincide with each other, or when a phase difference between the signals is found fairly constant over time, the position of the sensor at which such condition is found and/or the vicinity thereof is identified as the location of a source of the interference electromagnetic wave. | 09-12-2013 |
20130245971 | DEFECT COORDINATES MEASUREMENT DEVICE, DEFECT COORDINATES MEASUREMENT METHOD, MASK MANUFACTURING METHOD, AND REFERENCE MASK - A defect coordinates measurement method includes a step of detecting detected coordinates of a fiducial mark and a defect of a mask blank placed on support pins, a step of detecting detected coordinates of the alignment mark of a reference mask placed on the support pins, a step of extracting a reference mark near the detected coordinates of the defect among the plurality of reference marks based on the detected coordinates of the defect of the mask blank and the alignment mark of the reference mask, a step of detecting detected coordinates of the extracted reference mark, and a step of calculating coordinates of the defect based on the detected coordinates of the reference mark and the detected coordinates of the defect. | 09-19-2013 |
20130297237 | Systems and Methods for Detecting Ultracapacitor Cell Short Circuits - A system for detecting a short-circuited ultracapacitor cell in a machine is disclosed. The system may have a memory that stores instructions and one or more processors capable of executing the instructions. The one or more processors may be configured to perform cell balancing among ultracapacitor cells arranged within two or more ultracapacitor modules, each ultracapacitor module including at least two ultracapacitor cells connected in series. The one or more processors may be further configured to measure a module voltage generated by each of the plurality of ultracapacitor modules after performing the cell balancing and before applying a load of the machine to the ultracapacitor modules, and determine whether an ultracapacitor cell among the plurality of ultracapacitor cells is short-circuited based on a comparison of the measured module voltages. | 11-07-2013 |
20130304406 | Apparatus and Method of Fault Detection and Location Determination - A distance from a measurement point to a fault in a three-phase circuit is determined. The measurement point is located at an output of a power sub-station and the three phase circuit has a loop circuit having an associated net fault line current and a ground current. A derivative of the net fault line current of the loop circuit as measured from the measurement point is calculated. An uncompensated distance to the sub-cycle fault using at least the derivative of the net fault current is determined, and configured, to compensate for the ground current of the loop circuit. The compensation is applied to the uncompensated distance to produce a compensated distance to the sub-cycle fault. | 11-14-2013 |
20130325375 | MONITORING DEVICE, INFORMATION PROCESSING APPARATUS, AND MONITORING METHOD - A monitoring device includes a holding circuit and a processor configured to give priority to a first failure over a second failure when the holding circuit holds the first failure and identify a first suspected portion in which the first failure has occurred. The first failure is a failure detected in a first power supply unit and the second failure is a failure detected at least either in a device or in a second power supply unit that converts power supplied from the first power supply unit and that supplies resultant power to the device. | 12-05-2013 |
20130345997 | INTEGRATED TIME DEPENDENT DIELECTRIC BREAKDOWN RELIABILITY TESTING - Methods for reliability testing include applying a stress voltage to a device under test (DUT); measuring a leakage current across the DUT; triggering measurement of optical emissions from the DUT based on the timing of the measurement of the leakage current; and correlating measurements of the leakage current with measurements of the optical emissions to determine a time and location of a defect occurrence within the DUT by locating instances of increased noise in the leakage current that correspond in time with instances of increased optical emissions. | 12-26-2013 |
20140005962 | METHODS, DEVICE AND INSTALLATION FOR LOCATING A DEFECT IN AN ELECTRIC LINK | 01-02-2014 |
20140052393 | METHOD FOR DETERMINING SPATIAL LOCATION OF CONDUCTING WIRE AND AERIAL EARTH WIRE OF POWER TRANSMISSION LINE - Disclosed is a method for determining the spatial location of a conducting wire and an aerial earth wire of a power transmission line, so as to solve the problem that the method in the prior art is not applicable to determining the spatial location of the conducting wire and the aerial earth wire of the conventional power transmission line with respect to lightning shielding failures. In the present invention, according to the physical locations of the conducting wires and aerial earth wires, the power transmission line shielding efficiency is calculated based on that the corresponding lightning shielding failure trip rate is zero when the exposure arc is zero, thus providing designing and operating units with a reliable analytical method for preventing lightning shielding failures, and meanwhile working out the shielding efficiency of the conducting wire of each phase more accurately, so as to analyze the structural relations between the aerial earth wires and conducting wires to determine the lightning protection effect of the whole power transmission line. The present invention provides a supplementary analytical method of the shielding efficiency of the existing power transmission lines. | 02-20-2014 |
20140074414 | Fault Location Using Traveling Waves - Disclosed herein are various embodiments of systems and methods for calculating a fault location in electric power delivery system based on a traveling wave created by an electrical fault in the electric power delivery system. According to one embodiment, an intelligent electronic device may be configured to detect a transient traveling wave caused by an electrical fault. A first traveling wave value of the transient traveling wave may be determined and a corresponding first time associated with the first traveling wave may be determined. The IED may receive a second time associated with a second traveling wave value of the transient traveling wave detected by a remote IED. The distance to the remote IED may be known. An estimated fault location may be generated based on the time difference between the first time and the second time. Additional methods of calculating the fault location may also be employed. | 03-13-2014 |
20140207396 | INTEGRATED TIME DEPENDENT DIELECTRIC BREAKDOWN RELIABILITY TESTING - Systems for reliability testing include a picometer configured to measure a leakage current across a device under test (DUT); a camera configured to measure optical emissions from the DUT based on a timing of the measurement of the leakage current; and a test system configured to apply a stress voltage to the DUT and to correlate the leakage current with the optical emissions using a processor to determine a time and location of a defect occurrence within the DUT by locating instances of increased noise in the leakage current that correspond in time with instances of increased optical emissions. | 07-24-2014 |
20140222356 | TEMPORAL REFLECTOMETRY SYSTEM AND METHOD FOR UNAMBIGUOUSLY LOCATING AN ELECTRICAL DEFECT IN A CABLE - A time domain reflectometry system for the unambiguous location of at least one singularity in a cable, comprises analysis and calculation means for reflectometry signals suited to generating two injection signals from at least one reflectometry signal, two digital-to-analog converters for converting said digital signals into analog signals, two coupling and transmission means for said signals at two distinct points of said cable, at least one analog-to-digital converter for converting the signal reflected by said singularity and received by said coupling and transmission means, said analysis and calculation means furthermore being suited to receiving and analyzing said reflected signal, digitally converted, to produce a time domain reflectogram, said signals being designed such that the signal propagating from one side of said cable is equal to said reflectometry signal and the signal propagating from the other side of said cable is substantially zero. | 08-07-2014 |
20140236503 | Method for Locating Faults in Ungrounded Power Distribution Systems - A method determines a location of a single-phase-to-ground fault in an ungrounded power distribution system. The method detects the faulty phase of the distribution system having the fault and compares a difference between an angle of a voltage and an angle of a current measured at a root of a faulty feeder and boundaries of each section of the faulty feeder to determine a faulty section of a faulty feeder having the fault. A line segment of the faulty section is tested for a change of a sign of a voltage on the faulty phase in the faulty section to determine a faulty line segment. The location of the fault is determined based on a distance from a terminal bus of the faulty line segment to a location along the faulty line segment having a value the voltage on the faulty phase equals zero. | 08-21-2014 |
20140236504 | REAL TIME ELECTROSTATIC DISCHARGE (ESD) DETECTION - In one embodiment, a method for determining electrostatic discharge (ESD) includes building a slider delta comparison map using slider electrical and/or row bar quasi testing results, wherein row bar quasi testing is performed on row bars of multiple sliders, and wherein slider electrical testing is performed on individual sliders, determining whether a test device in a parent job passes primary ESD delta criteria, when the test device fails the primary ESD delta criteria: flagging the parent job of the test device as a reroute job and performing automatic actual parts rerouting for any jobs related to the parent job to pull parts from a test bin as opposed to a supply bin, wherein all parts pulled from the test bin are tested prior to assembly as opposed to parts pulled from the supply bin which are not 100% tested. | 08-21-2014 |
20140278161 | METHOD FOR DETERMINING A SIGNAL TRANSMISSION MODE OF A PLURALITY OF FAULT INDICATORS - A method for determining a signal transmission mode of a plurality of fault indicators includes a data retrieval step, a mode setting step, a number setting step, an analysis step, a first determination step, a calculation step, a second determination step and a mode number increasing step. Based on the above step, the method is able to determine a preferred number of times the fault signals are required to be transmitted between the plurality of fault indicators when a predetermined transmission success rate is met, reducing the energy consumption and prolonging the service life of the indicators. | 09-18-2014 |
20140278162 | DETECTING AND LOCATING POWER OUTAGES VIA LOW VOLTAGE GRID MAPPING - In a power grid capable of electrical power delivery and power line communications, a distribution transformer and at least one smart meter is connected to the power grid. In one embodiment, the distribution transformer is configured to map the smart meters on the power grid to a virtual grid based upon measurements of signal metrics received from the various smart meters on the power grid, and the virtual grid is used to determine if a failure has occurred on the physical grid. A communications failure between nodes on the grid suggests a possible power failure, and the failure can be located using mapping information obtained from the virtual grid. A drop in power consumption on the power grid corroborates outages detected via the communications failure. In one embodiment, a cross phase delta value is computed to adjust the signal strength metrics measured between nodes having differing phases of electrical distribution. | 09-18-2014 |
20140309953 | Method for Locating of Single-Phase-to-Ground Faults of Ungrounded Power Distribution Systems - The method determines shunt caused residual voltages and fault caused residual voltages on the upstream bus and the downstream bus of the line segment within a faulty feeder section of a faulty feeder. The line segment is designated as a faulty line segment when a reference angle of a faulty phase is between a first angle of a difference between an angle of the fault caused residual voltage and an angle of the shunt caused residual voltage on the upstream bus and a second angle of a difference between an angle of the fault caused residual voltage and an angle of the shunt caused residual voltage on the downstream bus. The location of the fault is determined at a point on the faulty line segment with a difference between the angles of the fault and the shunt caused residual voltages in phase with the reference angle. | 10-16-2014 |
20140316726 | REFLECTOMETRY METHOD FOR DETECTING SOFT FAULTS IN AN ELECTRICAL CABLE, AND SYSTEM FOR IMPLEMENTING THE METHOD - A reflectometry method for detecting faults in a cable, comprising a step of comprises acquiring a signal injected into the cable and reflected off at least one singularity of the cable, and the following steps:
| 10-23-2014 |
20140324369 | METHOD FOR DETERMINING POSITION OF FORCED POWER OSCILLATION DISTURBANCE SOURCE IN REGIONAL INTERCONNECTED POWER GRID - Disclosed is a method for determining a position of a forced power oscillation disturbance source in a regional interconnected power grid. According to the method, when forced power oscillation occurs in a regional power grid, an algebraic sum of energy flow directional factors in the regions of the regional interconnected power grid is calculated so as to online determine the position of the disturbance source in real-time. Compared with the conventional disturbance source positioning method based on an energy function, the disturbance source positioning method based on calculation of the energy flow directional factors provided by the invention can reduce the impact of a periodic disturbance component and an initial constant on the determination of an aperiodic component of branch potential energy, thus achieving higher accuracy. Moreover, the integration links are reduced and the calculation process is simplified, thus better meeting the requirements for real-time power grid calculation. | 10-30-2014 |
20140336958 | Techniques for Determining a Fault Probability of a Location on a Chip - A method for determining relevance values representing a relevance of a combination of an input node of a first number of input nodes with a measurement node of a second number of measurement nodes for a detection of a fault on a chip applies a third number of tests at the first number of input nodes, measures for each test of the third plurality of tests a signal at each of the second number of measurement nodes to obtain for each measurement node of the second number of measurement nodes a third number of measurement values, and determines the relevance values, wherein each relevance value is calculated based on a correlation between the third number of test input choices defined for the input node of the respective combination and the third number of measurement values associated to the measurement node of the respective combination. | 11-13-2014 |
20140336959 | FAULT LOCATION IN POWER DISTRIBUTION SYSTEMS - A method of locating a fault on an electricity transmission line is disclosed. The transmission line has a known line impedance and is operable to transport electricity at one or more system frequencies. The method comprises using measurements of the current and voltage made on the line at one or more frequencies which are different to the system frequency and the known line impedance (Z) to determine a distance to the fault. The method may include monitoring the voltage and the current on the transmission line at the one or more non-system frequencies, and determining from the presence of signals at a non-system frequency on the transmission line that a fault has occurred. | 11-13-2014 |
20140358455 | SYSTEMS AND METHODS FOR OVERHEAT DETECTION SYSTEM EVENT LOCATION - Embodiments relate to systems for improved relative location identification for overheat, short circuit, and open circuit events. The systems accomplish the improvements by utilizing any, or a combination, of implementing a novel calculation formula, determining and implementing an external offset value, and determining and implementing an internal offset value. | 12-04-2014 |
20150073735 | METHOD FOR ADAPTIVE FAULT LOCATION IN POWER SYSTEM NETWORKS - The adaptive fault location method for power system networks utilizes phasor measurement units (PMUs) disposed at disparate locations to obtain synchronized phasor measurements. Three different sets of pre-fault voltage and current phasor measurements are obtained at both terminals of the line under test. The three sets of local PMU measurements at each terminal are used for online calculation of a corresponding system's Thevenin equivalent (TE). This representation of the power system pre-fault network is a reduced two-terminal equivalent. Using the method of multiple measurements with linear regression (MMLR), the three sets of PMU measurements are also employed for online calculation of the transmission line parameters (series resistance, series reactance and shunt susceptance). Online determination of the TEs and line parameters can enhance fault location accuracy by avoiding possible mismatch with the actual parameters due to system loading and other environmental conditions. | 03-12-2015 |
20150081235 | FAULT LOCATION USING TRAVELING WAVES BY CALCULATING TRAVELING WAVE ARRIVAL TIME - A location of a fault in an electric power delivery system may be detected using traveling waves instigated by the fault. The time of arrival of the traveling wave may be calculated using the peak of the traveling wave. To determine the time of arrival of the peak of the traveling wave, estimates may be made of the time of arrival, and a parabola may be fit to filtered measurements before and after the estimated peak. The maximum of the parabola may be the time of arrival of the traveling wave. Dispersion of the traveling wave may also be corrected using an initial location of the fault and a known rate of dispersion of the electric power delivery system. Time stamps may be corrected using the calculated dispersion of the traveling wave. | 03-19-2015 |
20150081236 | TRAVELING WAVE VALIDATION USING ESTIMATED FAULT LOCATION - Electric power delivery system fault location systems and methods as disclosed herein include validation of the received traveling wave fault measurements. Validation may include estimating a location of the fault using an impedance-based fault location calculation. Time windows of expected arrival times of traveling waves based on the estimated fault location and known parameters of the line may then be established. Arrival times of traveling waves may then be compared against the time windows. If the traveling waves arrive within a time window, then the traveling waves may be used to calculate the location of the fault. | 03-19-2015 |
20150100255 | METHOD FOR LOCATING FAULTS IN A POWER NETWORK HAVING FAULT INDICATORS - A method for locating faults in a power network includes reading power network information stored in a database in a data reading step. A power network matrix is created based on the power network information in a power network creating step. A fault current vector is created in a fault current vector creating step. In a fault locating step, a backward substitution is carried out on the fault current vector and the power network matrix to obtain a detection zone vector, and the fault can be located. The fault locating speed of the power network is, thus, increased. | 04-09-2015 |
20150100256 | IMBALANCE DETERMINING METHOD, IMBALANCE DETERMINING APPARATUS, AND RECORDING MEDIUM - A non-transitory computer-readable recording medium has stored therein a program that causes a computer to execute an imbalance determining process. The imbalance determining process includes: analyzing fluctuation situations of voltage values of respective phases in a power distribution line using a three-phase three-wire system; determining whether a location at which degree of divergence in voltage values among the phases exceeds a predetermined criterion is present; and outputting a result of the determining. | 04-09-2015 |
20150142345 | Status Monitoring Systems and Methods for Uninterruptible Power Supplies - A power supply system for use in a communications system comprises a power supply, a cable interface module, and a processor. The power supply is connected to a local supply, a utility supply, and the communications system. The cable interface module detects an FBC signal associated with the communications system. The processor executes a monitoring process in which the processor monitors the FBC signal for characteristics associated with at least one anomaly and generates a trap signal when an anomaly is detected. | 05-21-2015 |
20150293166 | Differential Protection Method and Protective Apparatus for Carrying Out a Differential Protection Method - A differential protection method for generating a fault signal. Current measurement values are acquired at different measuring points of a component. Differential current values and stabilizing values are formed using the current measurement values, and the fault signal is generated when a tripping range test indicates that a measured value pair formed from one of the differential current values and the respective associated stabilizing value lies in a predetermined tripping range. Differential current values are estimated from successive differential current values and associated stabilizing values and associated estimated stabilizing values are formed. A value of an expected future trend of the differential current values and of the stabilizing current values is estimated. A tripping range test finds the position of a measured value pair formed from an estimated differential current value and the respective associated estimated stabilizing value. An electrical protective device has a corresponding evaluation unit. | 10-15-2015 |
20150301100 | USING MODELING FOR IDENTIFYING A LOCATION OF A FAULT IN AN RF TRANSMISSION SYSTEM FOR A PLASMA SYSTEM - Systems and methods for identifying a location of a fault in an RF transmission system includes characterizing the RF transmission system and selecting one of the stage in the RF transmission system as an initial selected stage. An output of the initial selected stage can be measured in the characterized RF transmission system. The measured output of the initial selected stage is propagated through a baseline RF model and a point of deflection is identified in a resulting RF model of the RF transmission system. | 10-22-2015 |
20150301101 | ADAPTIVE PMU-BASED FAULT LOCATION METHOD FOR SERIES-COMPENSATED LINES - The adaptive phasor measurement unit (PMU)-based series-compensated line (SCL) fault location method uses three different sets of pre-fault voltage and current phasor measurements at both terminals of the SCL. The three sets of local PMU measurements at each terminal are used for online calculation of a respective Thevenin Equivalent (TE). This enables representation of the power system pre-fault network with a reduced two-terminal equivalent system. The PMU measurements are also utilized for online calculation of the SCL parameters. This non-iterative method does not need knowledge of a time elapsed for the wave propagation from a fault point to a sending end and a receiving end. Two subroutines S | 10-22-2015 |
20150331035 | POWER QUALITY EVENT LOCALIZATION BY MULTIPLE INDEXES - An apparatus includes an upstream/downstream probability module that determines, for each measurement point in an electrical power system, an upstream/downstream probability. The apparatus includes a zone module that identifies a plurality of zones within the power system and an upstream/downstream module that identifies, for each measurement point and for each zone, if a power quality event in a zone is upstream or downstream of a measurement point. The apparatus includes a zone probability module that determines a zone probability for each zone by multiplying the upstream probability or the downstream probability for each measurement point. The zone probability is a probability that the event happened in a zone. The zone probability module uses the upstream probability of a measurement point when the zone is upstream of the measurement point and uses the downstream probability when the zone is downstream of the measurement point. | 11-19-2015 |
20150346266 | SYSTEM AND METHOD FOR PULSED GROUND FAULT DETECTION AND LOCALIZATION - A system for locating a ground fault in a high resistance grounded (HRG) power distribution system includes a pulsing circuit configured to introduce a pulse current into the distribution system and current sensors adapted to monitor three-phase current signals present on conductors of the distribution system, with the current sensors positioned on a number of distribution networks included in the HRG power distribution system and at a protective device included on each respective distribution network. A processor associated with each protective device receives signals from the current sensors for identifying a location of the ground fault in the HRG power distribution system, with the processor associated with each protective device receiving measurements of the three-phase current signals from the current sensors over a plurality of cycles and identifying a pattern of interest in the three-phase current signals across the plurality of cycles in order to detect a ground fault. | 12-03-2015 |
20160011252 | Decision Support System for Outage Management and Automated Crew Dispatch | 01-14-2016 |
20160018458 | ELECTRIC OUTAGE DETECTION AND LOCALIZATION - Methods and arrangements for localizing an outage in a power grid. An outage is detected in a power grid, the power grid comprising interconnected nodes. At least one candidate network topology (in the power grid) with respect to the outage is determined, and power consumption information and measured voltages relative to the nodes in the power grid are received. Voltage at a plurality of the nodes in the power grid is estimated based on the received power consumption information and on the at least one candidate network topology, and a location of the outage is estimated, based on the estimated node voltages and measured voltages. Other variants and embodiments are broadly contemplated herein. | 01-21-2016 |
20160061873 | METHOD FOR LOCATING DISTRIBUTION NETWORK CIRCUIT FAULT BASED ON FULL WAVEFORM INFORMATION - A method for detecting and locating faulty line on the distribution network circuit based on full waveform information, which uses the current data on the fault occurrence and whole-process operation of the compensation device to effectively solve such common problems as low fault current, poor reliability and low sensitivity in case of single-phase grounding fault to the low-current system through precise GPS synchronization. It improves the sensitivity and reliability of the grounding fault detection, which does not interfere with the system and is applicable to high-resistance grounding. | 03-03-2016 |
20160091555 | DIRECTIONAL DETECTION OF EARTH FAULTS IN AN ELECTRICAL DISTRIBUTION NETWORK - Method for the directional determination of an earth fault in an electric power distribution network, characterised in that it comprises the steps of:
| 03-31-2016 |
20160116522 | FULLY ADAPTIVE FAULT LOCATION METHOD - The fully adaptive fault location method is based on synchronized phasor measurements obtained by Phasor Measurement Units (PMUs). The method utilizes only PMU synchronized measurements and does not require any data to be provided by the electric utility. Line parameters for each section of the line and Thevenin's equivalents (TEs) of the system at each of three terminals are determined online, utilizing three independent sets of pre-fault PMU measurements. This ensures that the actual operating conditions of the system are adequately considered. Simulation results show that the present method is capable of producing reliable and very accurate solutions. | 04-28-2016 |
20160202307 | A FAULT LOCATION DETECTION SYSTEM AND METHOD | 07-14-2016 |
20160202308 | METHOD AND SYSTEM FOR IDENTIFYING FULL PARAMETERS OF ELEMENT BY FAULT RECORDING AND FAULT LOCATING METHOD | 07-14-2016 |
20190146024 | FAULT LOCATION DURING POLE-OPEN CONDITION | 05-16-2019 |