Abstract: A system and method for online monitoring partial discharge of a generator are disclosed. The system is connected in parallel with a busbar between the generator and electric network, includes: a near-end circuit on a generator side, which includes a near-end capacitive coupling sensor connected to the busbar and a near-end impedor connected in series with the near-end capacitive coupling sensor; a far-end circuit on an electric network side, which includes a far-end capacitive coupling sensor connected to the busbar and a far-end impedor connected in series with the far-end capacitive coupling sensor; and a detection device, which has a near-end input terminal connected to a connection point between the near-end capacitive coupling sensor and the near-end impedor through a near-end cable, a far-end input terminal connected to a connection point between the far-end capacitive coupling sensor and the far-end impedor through a far-end cable, and a processing unit.

Abstract: A differential protection system has a differential protection device at each end of a line section of an electrical power transmission line, such that it can selectively identify and safely disconnect even high-impedance faults on the monitored line section.

Abstract: 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.

Abstract: Provided is a test apparatus that tests a device under test, comprising a test signal generating section that generates a test signal to be applied to the device under test; a first driver that is electrically connected to a terminal of the device under test and that supplies the test signal to the terminal of the device under test; a correction signal generating section that generates a correction signal for correcting attenuation of the test signal occurring until the test signal reaches the terminal of the device under test; and a second driver that is electrically connected to the terminal of the device under test and that supplies the correction signal to the terminal of the device under test.

Abstract: A method and algorithm are disclosed that can be used to determine if an electrical fault exists within a protection zone defined as in the area between specific current transformers. (CTs). Currents from CTs are brought into a microprocessor (or other device) that converts the analog currents into digital quantities. The current quantities are summed both vectorially and arithmetically by the microprocessor. The mathematical derivative of the vector and the arithmetic sums are compared in order to determine if an electrical fault exists within the protection zone. An electrical trip signal is generated by the microprocessor if the fault is deemed to be in the protection zone.

Abstract: 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.

Abstract: A line locator includes a signal detector to detect signals from an underground line; an error modeler that models a phase error in the signal from neighboring underground lines; and an enhanced electromagnetic field modeler that provides a location of the underground line based on the signal and a result from the error modeler.

Abstract: A method includes providing a plurality of failure dies, and performing a chip probing on the plurality of failure dies to generate a data log comprising electrical characteristics of the plurality of failure dies. An automatic net tracing is performed to trace failure candidate nodes in the failure dies. A failure layer analysis is performed on results obtained from the automatic net tracing. Physical failure analysis (PFA) samples are selected from the plurality of failure dies using results obtained in the step of performing the failure layer analysis.

Abstract: According to an aspect of the invention a method is provided comprising: providing a model for a predetermined location within an electrical power system having therein distributed resources (DR), the model based on known system conditions, the model indicative of first sensed characteristics of the electrical power system at the predetermined location; sensing at the predetermined location characteristics of the electrical power system corresponding to at least some of the first sensed characteristics; determining a status of the electrical power system network indicative of an islanding event in dependence upon sensing and other than in dependence upon other sensed data sensed remotely from the predetermined location; and, controlling a distributed resource in dependence upon the status.

Abstract: 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 (D1, D2, S) suitable for determining whether a detected partial discharge is internal or external relative to the live apparatus.

Abstract: A method for locating a fault in a two-terminal power transmission or distribution line. Measurements of the three phase currents are received from both terminals. Measurements of the three phase voltages are received from one line terminal. Parameters of the line are received. The fault type is received. Based on this received information the distance to fault from the one terminal where the phase voltages were measured is determined and output. Since only the phase voltages of one line terminal are needed, the functionality of a device, in particular a current differential relay, can be expanded to determine the distance to fault in an off-line mode.

Abstract: “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.

Abstract: 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.

Abstract: A floating net inspection method includes: providing a netlist which describes a circuit structure of an application circuit, the application circuit including a plurality of transistors; coupling a power supply port and a signal input port of the application circuit to voltage sources, respectively; generating test voltages respectively through the voltage sources, such that the test voltages are applied to the transistors, the test voltages being larger than a reference voltage; and determining whether a connecting node of one of the transistors is floating on the basis of whether a voltage of the connecting node is larger than the reference voltage.

Abstract: In a motor control device that drives a plurality of motors with one DC power supply, detection of a short circuit fault occurring in the motors is realized with an inexpensive configuration. In order to drive the plurality of motors (105, 106), a current detection resistor (404, 405) is arranged between a connection point on positive terminal sides of a plurality of electric power converters (401, 402) connected in parallel to a DC power supply (403) and a positive terminal of the DC power supply, or also between a connection point on negative terminal sides of the plurality of electric power converters and a negative terminal (ground) of the DC power supply, to thereby detect the short circuit fault based on a voltage of the current detection resistor.

Abstract: A load compensation method for phase-to-ground loops in distance protection. A first reactive reach is estimated assuming zero fault resistance or with a positive sequence current. A second reactive reach is estimated with a zero sequence current. A third reactive reach is estimated with a negative sequence current. An import or export condition is estimated. A fourth reactive reach for import or export condition is estimated based on the first, second and third reactive reach. A fault impedance is estimated based on the estimated fourth reactive reach.

Abstract: 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.

Abstract: One or more example diagnostics may be implemented as part of an intelligent luminaire manager or other radio frequency (RF) device that is in communication with an equipment or fixture such as a luminaire. Example diagnostics can determine a status such as a fixture malfunction, a cycling condition, a miswiring configuration, or another condition. The determined status can be wirelessly transmitted from the intelligent luminaire manager or other radio frequency device to a network server via a network. The network may be a network of intelligent luminaire managers and/or RF devices.

Abstract: A method is disclosed to alert a system administrator of a failure condition within a distributed system having a chassis, a management module, and one or more devices installed in the chassis. Such a method may initially identify whether a device within the chassis has encountered a failure condition. The method may then determine whether the device requires removal from the chassis based on the failure condition. The method may cause a visual fault indicator associated with the device to assume a first illuminated state in the event the device requires removal. The method may cause the visual fault indicator to assume a second illuminated state in the event the device does not require removal. If communication with a management module is possible, a visual fault indicator on the chassis may assume a third illuminated state if the device requires removal. A corresponding apparatus and computer-program product are also disclosed.

Abstract: 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.

Abstract: A measurement base voltage stability monitoring and control scheme having a means for measuring current and voltage phasors at a boundary bus of a load center; and an equivalent network having a fictitious bus with an aggregate load representative of all loads of the load center. The scheme further includes a computing device to calculate a voltage stability margin index based on the aggregate load of the fictitious bus and compare the voltage stability margin index to a pre-set threshold. The computing device causes an action to take place based on the comparison between the voltage stability margin index and the pre-set threshold.

Abstract: 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 processing 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. A wideband magnetic probe may be provided for detecting the pulses traveling in the electrical equipment.

Abstract: 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.

Abstract: A method for locating partial discharges occurring at a discharge site (2) in an electric apparatus (3) with elongate geometry and generating corresponding electric pulses (4) propagating in opposite directions along the apparatus (3) from the discharge site (2) comprises the steps of detecting (11) the electric pulses (4) picked up by a first and a second sensor (5, 7), operatively connected to the apparatus (3) and spaced out along it, and generating corresponding electric signals representative of the waveform of the pulses (4), selecting (12) at least one pair of signals, detected in the consecutive sensors (5, 7), and representative of a pair of homologous pulses (4), relating to the same partial discharge and propagating in opposite directions along the apparatus, deriving, for the signals of the selected pair of homologous pulses (4), at least one attenuation parameter, correlated with a quantity that is variable depending on the distance travelled by the pulses (4), calculating (13) the distance betwe

Abstract: A method for locating partial discharges occurring at a discharge site (2) in an electric apparatus (3) with elongate geometry and generating corresponding electric pulses (4) propagating in opposite directions along the apparatus (3) from the discharge site (2) comprises the steps: (11) of detecting the pulses (4) picked up by a first and a second sensor (5, 7), connected to the apparatus (3) and spaced out along the same; (15) of deriving shape, phase and amplitude parameters for each of the signals detected; (17) of separating the sets of signals detected in each sensor into respective subsets which are uniform in terms of pulse waveform; (18) of identifying the subsets of signals relating to partial discharges and classifying them; (19) of correlating the subsets relating to different sensors and similarly classified, in order to derive a pair of subsets of signals relating to the same discharge site (2); (12) of selecting, for the pair of correlated subsets, at least one pair of homologous pulses (4) det

Abstract: 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.

Abstract: A visualization system for monitoring performance data of an electrical power distribution network is provided. In one embodiment, a user may select a network circuit and view a network circuit diagram that includes indicia representing transformers and other electrical power distribution network elements positioned on a map. The relative positions of the indicia on the network circuit diagram may correspond to the relative physical locations of the transformers in the geographical area represented by the map. The indicia may be color coded to convey performance data to the user.

Abstract: 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.

Abstract: A fault coverage calculating apparatus includes: an extraction module configured to extract information on a pair of wiring lines including a length of the pair adjacent within a predetermined distance range and a distance between the pair and bridge fault information corresponding to the pair from layout information of a semiconductor integrated circuit; a test module configured to perform a determination test for determining whether a bridge fault occurring in the pair is detected by using a bridge fault test pattern of a target; and a calculation module configured to calculate a bridge fault coverage to which the length and the distance are weighted, based on the information on the pair of wiring lines, the bridge fault information, a result of the determination test, and a bridge fault incidence depending on the distance.

Abstract: The present invention discloses a plant diagnostic system for diagnosing a problem with the plant. The plant diagnostic system can include an agent-based plant diagnostic network that has an adaptive global agent located in a central facility, a plant expert agent located at the plant and a plurality of subsystem resident agents. Each of the subsystem resident agents can be assigned to a subsystem of the plant. A diagnosis agent can also be included, the diagnosis agent operable to be instructed by the adaptive global agent, transmitted to the plant expert agent, be received by the plant expert agent, transmitted by the plant expert agent back to the adaptive global agent and be received by the adaptive global agent.

Abstract: A monitoring system for detecting a short circuit condition in a switching subsystem of a bypass input of a power supply. The system may comprise a voltage monitoring subsystem for monitoring a voltage across at least one component of the switching subsystem and generating a first output signal in accordance therewith. A processor, responsive to the first output signal from the voltage monitoring subsystem, may be used to compare the first output signal with a predetermined threshold signal and to generate a second output signal based on the comparison. The processor may also be used to consider a state of a circuit breaker in communication with the switching subsystem and to use the state of the circuit breaker and the second output signal to determine whether at least one of a short circuit condition and an open circuit condition exists with respect to the switching subsystem.

Abstract: An aircraft Ice Detection pitot-static tube is described which uses sensors integrated into the pitot-static tube to determine when and where the pitot-static tube is icing up. Temperature, thermal conductivity and impedance sensor measurements are combined with a mathematical transfer of the impedance sensor output into the complex dielectric plane to identify that the material accreating on the exterior and interior of the pitot-static tube is ice and only ice. Identification of ice realized when the trace in complex dielectric space has a distinctive semi-circular form, which only ice exhibits, with measured values in agreement with reference laboratory data stored in the onboard computer system.

Abstract: A system, method and computer program product for processing utility data of a power grid is provided. In one embodiment, the system includes a datamart comprised of a plurality of physical databases storing utility data, a plurality of applications comprising an automated meter application configured to process power usage data from a plurality of automated meters, a power outage application configured to identify a location of a power outage, and a power restoration application configured to identify a location of a power restoration. The system may include an analysis engine comprising a plurality of analysis objects with each analysis object configured to process data to provide a specific analysis, wherein said analysis engine is accessible via one or more of the plurality of applications, and the system may include a report module configured to receive an output from the analysis engine and to output a report.

Abstract: A method and a system for determining a circular characteristic for distance protection of a three-phase electric line, the system comprising means for detecting a fault on the electric line, means for identifying a faulted phase or phases of the electric line, means for determining, at a measuring point, a first fault loop impedance by using voltage(s) of the faulted phase(s), a second fault loop impedance by using a polarization voltage and a third fault loop impedance by using predetermined line parameters, and means for determining a radius and midpoint of the circular characteristic.

Abstract: A method for locating electrical shorts in layout designs by either systematically removing subcells in the layout hierarchy or, if the shorts are not found in any of the subcells, iteratively excluding portions of the top level layout from the electrical connectivity analysis and thereby locate the shorting polygons. Shorts existing both in subcells and the top level will be found by applying the method repeatedly until all shorts are located and eliminated.

Abstract: A diagnostic system for a hybrid vehicle comprises a motor control module and a fault diagnostic module. The motor control module controls torque output of an electric motor having a predetermined number of phases. The fault diagnostic module determines a position of a rotor of the electric motor, aligns the rotor with a phase angle of one of the phases, selectively diagnoses a fault based on a current of at least one of the phases, and selectively disables the electric motor based on the diagnosis.

Abstract: A leakage detection can be correctly performed both in a DC high voltage circuit and in an AC high voltage circuit in a vehicle-mounted power supply system. Under a state where a contactor 17 is turned off, all IGBT elements (switching elements) 76 in an IGBT inverter circuit 12 are turned on, and an AC signal Vs is applied to an applying point P. Then, a voltage measured at a voltage measurement point Q is compared with a threshold value to detect whether or not the leakage exists.

Abstract: It is provided an alarm system for underground boundary intrusion detection, and methods for deployment and operation. The deployment method includes constructing of a computing-and-empowering apparatus, connecting thereof a longitudinally extended power-and-communication cable, connecting addressable junction-units, storing a physical location and an address of each junction-unit in the computing-and-empowering apparatus, connecting each addressable junction-unit to a wired-mole having a wire bundle which initially is contracted there within and measurable physical characteristics, and infiltrating the wired-moles normally into ground to a desired depth. In operation, the sensors frequently measure the physical characteristics of the wired-mole, deliver the measurement of the physical characteristics to the computing-and-empowering apparatus, which stores and analyzes the measurements, comparing past and present measurements.

Abstract: Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.

Abstract: A system, method and computer program product for processing utility data of a power grid is provided. In one embodiment, the system includes a datamart comprised of a plurality of physical databases storing utility data, a plurality of applications comprising an automated meter application configured to process power usage data from a plurality of automated meters, a power outage application configured to identify a location of a power outage, and a power restoration application configured to identify a location of a power restoration. The system may include an analysis engine comprising a plurality of analysis objects with each analysis object configured to process data to provide a specific analysis, wherein said analysis engine is accessible via one or more of the plurality of applications, and the system may include a report module configured to receive an output from the analysis engine and to output a report.

Abstract: 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.

Abstract: A method of inspecting a pattern on a substrate, by extracting boundary locations from design data for repeating blocks within the pattern, inspecting the substrate at only the boundary locations of the repeating blocks, detecting alignment errors at the boundary locations, comparing the alignment errors to a threshold, and flagging the alignment errors that exceed the threshold. In this manner, the alignment errors that were of no consequence in larger design rule devices can be detected, and a determination can be made as to whether they adversely impact the proper operation of the integrated circuit that will eventually be formed from the pattern. By performing the inspection only on the boundary locations, a much higher magnification can be used than what would be reasonably possible for an inspection of the entire substrate.

Abstract: 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.

Abstract: A defect analyzer system having a program storage device storing instructions and an arithmetic unit executing the instructions. The system divides a defect analyzing region of a wafer into a plurality of grid squares and classifies the grid squares into a plurality of groups. The system then matches the defect information with the defect analyzing region. The defect information includes defect positions and sizes detected in the defect analyzing region. The system calculates a defect size distribution for each defect size in each of the groups, compares the defect size distribution and a predetermined estimation distribution for each of the groups, and calculates a difference. The system then compares the difference of each of the groups and a predetermined threshold value, extracts the group having the difference equal to or smaller than the predetermined threshold value, and outputs the defect information corresponding to the extracted group.

Abstract: Systems and methods for designing and controlling distributed generation resources are disclosed. Monolithic or distributed controllers control the power requests sent to each distributed generation resource to achieve optimal efficiency using rule-based and/or fuzzy logic-based control techniques. High-impedance fault (HIF) detection circuitry allows power export to the utility grid in normal operating circumstances, and when an islanding condition is detected, ceases that export within two seconds and prevents further export until the condition is cleared.

Abstract: An apparatus includes at least one Rogowski coil and a processor. The at least one Rogowski coil is positioned within an electrical power distribution network to detect a first traveling wave current caused by a fault on an electrical power transmission line of the network, generate a first signal indicative of detection of the first traveling wave, detect a second traveling wave current caused by the fault on the transmission line, and generate a second signal indicative of detection of the second traveling wave. The processor is adapted to receive the first signal and the second signal and to determine, based on the first signal and the second signal, where on the transmission line the fault occurred.

Abstract: 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.

Abstract: 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.

Abstract: 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 generatio

Abstract: The invention provides a portable and autonomous assistance device to derive information on faults in a private telecommunication installation comprising particularly equipment units to assist the client owning the installation in maintaining the latter. A maintenance session is selected in a maintenance server of the service provider managing the installation as a function of information transmitted by the assistance device so as to provide instructions in the device. The address of the server and an identifier of the equipment unit are rapidly read by means of a bar code reader which can also read bar codes in a user manual. The assistance device also serves to configure a terminal (TE) by means of a configuration session opened in a server (SFT) of the terminal manufacturer.