Fault Location Patents (Class 702/59)
  • Patent number: 10690709
    Abstract: A ground electrode (100) positioned in the earth and a monitoring device (200) configured to measure a current and resistance of a ground line, where the monitoring device (200) includes a ground current sensing unit (210) configured to measure the current of the ground line, a resistance sensing unit (220) configured to measure ground resistance of the earth and an earth resistance rate, a voltage sensing unit (230) configured to check a voltage value of commercial power, a temperature and humidity sensing unit (240) configured to check a surrounding temperature and humidity of the monitoring device (200), and a monitoring unit (250) configured to confirm whether the ground current, ground resistance and earth resistance measured are abnormal values by compared with reference values classified based on the temperature and humidity measured.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: June 23, 2020
    Inventors: Dong-Jin Kim, Jong-Yeon Kim, Wan-Seong Kwon, Dong-Min Kim, Yong-Su Kim, Byeong-U Kim
  • Patent number: 10666051
    Abstract: Electrical circuit control techniques in power systems are disclosed herein. In one embodiment, a supervisory computer in the power system can be configured to fit phasor measurement data from phasor measurement units into a Gaussian distribution with a corresponding Gaussian confidence level. When the Gaussian confidence level of the fitted Gaussian distribution is above a Gaussian confidence threshold, the supervisory computer can be configured to perform an ambient analysis on the received phasor measurement data to determine an operating characteristic of the power system. The supervisory computer can then automatically applying at least one electrical circuit control action to the power system in response to the determined operating characteristic.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: May 26, 2020
    Assignee: Washington State University
    Inventors: Vaithianathan Venkatasubramanian, Ebrahim Rezaei
  • Patent number: 10445218
    Abstract: Methods and devices for testing graphics hardware may include reading content of a selected capture file from a plurality of capture files. The methods and devices may include transferring content from the selected capture file to an emulator memory of an emulator separate from the computer device. The methods and devices may include executing at least one pseudo central processing unit (pseudo CPU) operation to coordinate the execution of work on a graphics processing unit (GPU) of the emulator using the content from the selected capture file to test the GPU. The methods and devices may include receiving and store rendered image content from the emulator when the work is completed.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: October 15, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Aaron Rodriguez Hernandez, Jason Gould, Cole Brooking, Nihar Mohapatra, Parikshit Gopal Narkhede, Veena K. Malwankar
  • Patent number: 10447030
    Abstract: A method is provided for protection in a mixed power transmission line by controlling a switching device connected thereto through an Intelligent Electronic Device (IED). The mixed line has two or more sections with at least one overhead section (10A) and at least one underground section (10B), wherein every two consecutive sections are connected at a junction (10C). The method is implemented by the IED (14), which receives a signal from a measurement equipment. The IED detects a travelling wave from the signal, and determines a first peak of the travelling wave and at least one a peak width, a rise time and a discharge time of the first peak. The IED identifies the section with the fault based on a comparison of at least one of the peak width, the rise time and the discharge time with a corresponding threshold value of each junction, and controls the switching device based on the comparison.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: October 15, 2019
    Assignee: ABB Schweiz AG
    Inventors: Obbalareddi Demudu Naidu, Amit Purohit, Vinay Kariwala, Jianping Wang
  • Patent number: 10436831
    Abstract: A highly accurate fault location method for series-compensated double-circuit transmission lines having series compensation devices and metal oxide varistors (SC&MOV) at first and second terminal ends is provided. Synchronized or unsynchronized current phasors and local voltage phasors are used as input to the fault location method. The voltages and currents at the fault point are formulated as a function of the unknown fault location. Boundary conditions for the particular IED-determined fault type are used to derive the fault location formulas.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: October 8, 2019
    Assignee: ABB Schweiz AG
    Inventors: Ning Kang, Gergely Gombos, Mirrasoul J. Mousavi
  • Patent number: 10291287
    Abstract: A transmission arrangement for an aircraft for transmitting data within the aircraft, wherein the aircraft includes an electrical wiring system of coherent lines for providing electric power for loads in the aircraft, has at least two PLC elements, connectable to a respective one of the lines, for transmitting the data between at least two of the PLC elements via the wiring system, wherein at least one of the PLC elements has at least one filter connection, wherein the filter connection has at least one PLC connection, connectable to a respective one of the lines, and a power connection, connectable to a respective one of the lines, wherein the PLC connection carries power and data and the power connection carries power and is free of data.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 14, 2019
    Inventors: Beatrice Kornek-Percin, Goetz Wolk, Sven Gastel, Oliver Pluczinski, Benno Petersen
  • Patent number: 10197614
    Abstract: The present disclosure illustrates the errors that are encountered when using both single-ended and double-ended normal-mode fault location calculations when a fault occurs in a pole-open condition. The disclosure provides systems and methods for accurately calculating the location of faults that occur during pole-open conditions, including single-ended approaches and double-ended approaches.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: February 5, 2019
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Gabriel Benmouyal, Brian A. Smyth
  • Patent number: 10161985
    Abstract: A fault location detection method includes detecting an EMI signal and analyzing the spectral content of the electrical signal to identify a fault. A location recorder records the location of the system when the EMI signals are detected and a processor analyses the EMI signals and records the location of the system to determine a location of the fault. A memory includes an aerial photograph of a geographic location within which faults are to be detected and wherein the processor overlays the position of the faults on the aerial photograph. In addition, a transparent intensity map is superimposed onto a satellite photo of a geographic location and this is displayed to a user.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: December 25, 2018
    Assignee: Eskom Holdings SOC Limited
    Inventor: Simon Higgins
  • Patent number: 10115552
    Abstract: A retrofit CAFI/GFI remote control module may provide dual function protection for simple thermal-magnetic circuit breakers in a residential load center with arc fault and ground fault protection. The module provides line sensors and electronic processing to detect ground faults or arc faults, or both, and operates a bistable relay between the branch breaker and the load to open the circuit, which can then be remotely or manually reset.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: October 30, 2018
    Assignee: Schneider Electric USA, Inc.
    Inventor: Chad R. Mittelstadt
  • Patent number: 9871557
    Abstract: Embodiments provided describe detections of RF leakage test signal emanating from cable plant. In one embodiment a single mobile receive antenna, connected to a complex demodulator mobile receiver, receives a stabilized test signal radiating from the cable plant. The test signal may be a known continuous wave (CW) carrier or other deterministic signal. The received test signal varies in phase as a function of a position of the mobile receive antenna relative to the location of a leakage antenna. The phase variance forms a Doppler shift as the test antenna moves relative to the leakage antenna. The receiver generates multiple in-phase (I) and quadrature (Q) test signal samples over a SPA (synthetic phased array) distance as the test antenna's travels, and the samples are inserted into a Fourier transform. The result of the transform is instantaneous Doppler frequency shift, from which a bearing angle can be computed.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: January 16, 2018
    Assignee: Cable Television Laboratories, Inc.
    Inventor: Thomas H. Williams
  • Patent number: 9863997
    Abstract: Devices, methods, and systems for localizing a fault on a live cable are described herein. One system includes a wire fault localizer configured to receive current information from a location where direct current is applied to a cable comprising a number of loads, receive additional current information from at least two additional locations on the cable, wherein one of the at least two additional locations is on a source side of the cable and one of the at least two additional locations is on a load side of the cable, determine a fault resistance of the cable based on the received current information and received additional current information, and determine a fault distance on the cable based on the fault resistance.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: January 9, 2018
    Assignee: Honeywell International Inc.
    Inventors: Venkat Poluru, Mahadevanna Basavaraj Shreshthi, Thappeta Peddaiah, Zhenning Liu, Sundeep Vanka
  • Patent number: 9805477
    Abstract: A method for managing the display on a screen of an electronic device of at least one item of information relating to an apparatus. The method includes providing an enriched image of the apparatus, including an image of the apparatus and interest points of the apparatus, choosing at least one interest point from among the plurality of interest points, for obtaining a set of chosen interest points, selecting information to be displayed, providing a set of diagrams of the apparatus available for the apparatus, optimizing, according to a predefined criterion, each diagram of the apparatus available by inserting into the diagram of the apparatus a preview of information to be displayed for obtaining an enriched schematic representation, and classifying the enriched schematic representations according to the predefined criterion.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: October 31, 2017
    Inventors: Denis Morand, Tewfik Meftah
  • Patent number: 9784783
    Abstract: METHOD AND DEVICE TO IDENTIFY, RECORD AND STORE TRAVELING WAVE HEADS IN ELECTRIC POWER SYSTEMS consisting in sending a trigger (5) signal generated from the monitoring of the basic values of voltage and current of the electrical signal (1) of the transmission system in its fundamental frequency of operation (50/60 Hz), where the generated trigger (5) signal is controlled by continuous monitoring of the parameters derived from the basic values of current and voltage and tested against thresholds previously set by a user.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: October 10, 2017
    Assignee: Reason Tecnologia S.A.
    Inventors: Conrado Werner Seibel, Carlos Alberto Dutra
  • Patent number: 9689909
    Abstract: 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.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: June 27, 2017
    Assignee: CableWISE Techimp Limited
    Inventor: Jun Guo
  • Patent number: 9622808
    Abstract: The invention relates to a device for contactless communication between a surgical apparatus and at least one surgical instrument. The surgical apparatus comprises a control and evaluation device to which is assigned a writing or reading device which is connected to an antenna for the apparatus. The instrument is assigned at least one writable and readable memory device, embodied as an RFID transponder, which is connected to an antenna for the instrument, so that data can be exchanged between the writing or reading device of the surgical apparatus and the memory device of the instrument by means of wireless communication.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: April 18, 2017
    Assignee: Erbe Elektromedizin GmbH
    Inventors: Juergen Beller, Uwe Schnitzler, Peter Selig
  • Patent number: 9588169
    Abstract: There are disclosed apparatus and methods for testing a live circuit powered from an alternating current (AC) voltage. A zero crossing detector detects zero crossings of the AC voltage. A spread spectrum time domain reflectometer (SSTDR) coupled to the zero crossing detector performs measurements of the live circuit, each measurement synchronized with a zero crossings of the AC voltage. A processor coupled to the SSTDR detects faults in the live circuit based on correlation data provided by the SSTDR.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: March 7, 2017
    Assignee: LiveWire Innovation, Inc.
    Inventors: Lee Arthur Watkins, Niall Michael McNamara
  • Patent number: 9553215
    Abstract: The invention relates to a method and a device for recognizing faults in a photovoltaic system (1). A first output voltage (U0, UMPP) of the system (1) and/or a first parameter derived from the output voltage (U0, UMPP) is determined at a first point in time in a first operating state of the photovoltaic system (1). At a second point in time in a second operating state comparable to the first operating state, a second output voltage (U0, UMPP) and/or a second parameter of the system (1) derived from the output voltage (U0, UMPP) is determined. Finally, a deviation between the first and the second output voltage (U0, UMPP) and/or between the first and the second parameter is identified and a fault notification is output if the deviation exceeds a predeterminable threshold.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: January 24, 2017
    Assignee: Fronius International GmbH
    Inventors: Michael Ammer, Thomas Muehlberger, Roland Proetsch, Yvonne Zwirchmayr
  • Patent number: 9482705
    Abstract: The present invention provides methods and apparatus to detect the presence of interferers in a wideband digital VSWR measurement signal. Interferers cause power differences over different intervals of time and frequency, and may be detected by comparing the measured signals in both time and frequency domains with the original signal. Frequency components in the measured signals may be discarded if the interference is deemed too large. The remaining frequency components can then be used to compute the VSWR.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: November 1, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Krista Joleen Hind
  • Patent number: 9379771
    Abstract: A system for measuring a length of one or more spans between a first optical transceiver and a second optical transceiver in a fiber-optic network, which can determine, at a processor associated with the first optical transceiver, a round-trip time of an optical signal communicated from the first optical transceiver to the second optical transceiver and back to the first optical transceiver. The system can also determine, at the processor, a half-round-trip time by dividing the round-trip time by two. The system can also determine, at the processor, a distance between the first and the second optical transceivers by multiplying the speed of light by the half-round-trip time.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: June 28, 2016
    Assignee: Cisco Technology, Inc.
    Inventor: Chris Fludger
  • Patent number: 9354048
    Abstract: A method for measuring a substrate in the form of a lithography mask or a mask blank for producing a lithography mask comprises the alignment of a substrate coordinate system (SKS), predetermined by a first marker structure, relative to a position measurement system, a measurement of actual position data (IST) of a second marker structure with predetermined intended position data (POS) in the substrate coordinate system (SKS), and an establishment of a transformation (T) of the substrate coordinate system (SKS) into a transformed substrate coordinate system (tSKS), wherein the transformation (T) is established in such a way that deviations between the actual position data (IST) and the intended position data (POS) of the second marker structure are reduced.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: May 31, 2016
    Assignee: Carl Zeiss SMS GmbH
    Inventor: Carola Blaesing-Bangert
  • Patent number: 9228962
    Abstract: A cathodoluminescence detection system is provided, including a source of charged particles arranged to illuminate a sample with a charged particle beam, and an optical path having at least two optical components capable of collecting and conveying light radiation coming from the illuminated sample to an analysis device; each optical component of the optical path is selected so that: the maximum output angle of the optical component is less than or equal to 120% of the maximum acceptance angle of the next optical component; and the diameter of the radiation coming from the optical component in the input plane of the next optical component is less than or equal to 120% of the useful input diameter of the next optical component.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: January 5, 2016
    Assignees: Centre National de la Recherche, Universite Paris Sud 11
    Inventors: Mathieu Kociak, Luiz Fernando Zagonel, Marcel Tence, Stefano Mazzucco
  • Patent number: 9215045
    Abstract: Signals are transmitted from at least one transmitter that is positioned in an electrical network. The signals that have been transmitted are received a single receiver positioned within the electrical network. At the single receiver, the received signals are analyzed and a determination from the analyzing the received signals is made as to whether a fault has occurred in the electrical network and the approximate location of the fault.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 15, 2015
    Assignee: Howard University
    Inventor: Charles J. Kim
  • Patent number: 9182441
    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.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: November 10, 2015
    Assignee: ABB Technology AG
    Inventor: Murari Saha
  • Patent number: 9048781
    Abstract: There is provided an abnormality diagnosis device including: a storage storing power generation output data representing a current and a voltage of electrical power generated by each of the subsystems according to sampling time; a correcting unit configured to correct, for each of the subsystems, at least the current out of the current and the voltage in the power generation output data to a current corresponding to a standard insolation condition to generate corrected data including a corrected current and either one of a corrected voltage or the voltage in the power generation output data; a gradient estimating unit configured to produce, for each of the subsystems, an approximation graph of the corrected data and calculate a gradient of the approximation graph; and an abnormality diagnosing unit determining a subsystem for which the gradient satisfies a first threshold to be a subsystem including an abnormal module.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: June 2, 2015
    Inventors: Makoto Sato, Yoshiaki Hasegawa
  • Publication number: 20150142345
    Abstract: 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.
    Type: Application
    Filed: October 16, 2014
    Publication date: May 21, 2015
    Inventors: Robert P. Anderson, Pankaj H. Bhatt, John R. Hewitt, Ronald J. Roybal
  • Patent number: 9037424
    Abstract: 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.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: May 19, 2015
    Assignee: Caterpillar Inc.
    Inventors: Igor Dos Santos Ramos, Andrew A. Knitt, Wellington Ying-Wei Kwok, Kaiyu Wang
  • Patent number: 9037425
    Abstract: 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.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: May 19, 2015
    Inventors: Dongjun Yang, Jisheng Li, Jianyong Ding, Hanping Xu, Chunjian Luo
  • Patent number: 9026400
    Abstract: A method of processing system diagnostic data is provided for identifying likely device fix(s) associated with a diagnostic data, and identifying a repair procedure(s) for correcting the likely fix(s). The process receiving diagnostic data from a system onboard computer at a remote diagnostic database, the database being arranged to map system diagnostic data to possible vehicle fix(s). The possible device fix(s) are prioritized in accordance with ranked matches of the received diagnostic data to combinations of diagnostic data stored in a prior experience database. The prior experience database having an identified fix associated with each stored combination of diagnostic data. The fix associated with the highest ranked combination of diagnostic data is identified as the most likely fix. The most likely fix is mapped to a system repair database, the most likely fix being directly mapped to an associated repair procedure for repairing the most likely fix.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: May 5, 2015
    Assignee: Innova Electonics, Inc.
    Inventors: Ieon C. Chen, Robert Madison, Keith Andreasen
  • Patent number: 9026388
    Abstract: It is determined that a drop in the capacity of a sodium-sulfur battery has proceeded to an abnormal level when both the following expression (1) and expression (2) hold. Qe?Qn?K1 . . . (1) where Qe: abnormal block depth of discharge; Qn: normal block depth of discharge; and K1: block abnormality determination set point (setting value) and Qe?K2 . . . (2) where K2: depth of discharge abnormality determination set point (setting value).
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: May 5, 2015
    Assignee: NGK Insulators, Ltd.
    Inventors: Naoki Hirai, Motohiro Fukuhara
  • Patent number: 9021539
    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.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: April 28, 2015
    Assignee: Trilithic, Inc.
    Inventor: Raleigh Benton Stelle, IV
  • Patent number: 9006003
    Abstract: A method of detecting bitmap failure associated with physical coordinates is provided. In the method, data of wafer mapping inspection are obtained first, and the data include images of defects in each of layers within a wafer and a plurality of physical coordinates of the defects. Thereafter, a bitmap failure detection is performed to obtain digital coordinates of failure bits within the wafer. The digital coordinates are converted into a plurality of physical locations, and the physical locations are overlapped with the physical coordinates so as to rapidly obtain correlations between the failure bits and the defects.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: April 14, 2015
    Assignee: MACRONIX International Co., Ltd.
    Inventors: Tuung Luoh, Chi-Min Chen, Ling-Wuu Yang, Ta-Hone Yang, Kuang-Chao Chen
  • Patent number: 9009516
    Abstract: In one example, a method includes determining, based on motion data generated by a motion sensor of a wearable computing device, a plurality of motion vectors, wherein one or more components operatively coupled to the wearable computing device are operating in a first power mode during a first time period; determining, based on the plurality of motion vectors, a plurality of values. In this example, the method also includes, responsive to determining that each of the plurality of values satisfies a corresponding threshold, transitioning, by at least one component of the one or more components, from operating in the first power mode to operating in a second power mode.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: April 14, 2015
    Assignee: Google Inc.
    Inventors: Kevin Gabayan, William Haldean Brown
  • Publication number: 20150100256
    Abstract: 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.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 9, 2015
    Inventors: Tetsuya KASHIWAGI, Yuichi MATSUFUJI
  • Publication number: 20150100255
    Abstract: 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.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Applicant: I-SHOU University
  • Patent number: 9002673
    Abstract: Methods and apparatus are disclosed to simultaneously, wirelessly test semiconductor components formed on a semiconductor wafer. The semiconductor components transmit respective outcomes of a self-contained testing operation to wireless automatic test equipment via a common communication channel. Multiple receiving antennas observe the outcomes from multiple directions in three dimensional space. The wireless automatic test equipment determines whether one or more of the semiconductor components operate as expected and, optionally, may use properties of the three dimensional space to determine a location of one or more of the semiconductor components. The wireless testing equipment may additionally determine performance of the semiconductor components by detecting infrared energy emitted, transmitted, and/or reflected by the semiconductor wafer before, during, and/or after a self-contained testing operation.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: April 7, 2015
    Assignee: Broadcom Corporation
    Inventors: Arya Reza Behzad, Ahmadreza Rofougaran, Sam Ziqun Zhao, Jesus Alfonso Castaneda, Michael Boers
  • Patent number: 8993943
    Abstract: In some aspects of the invention, a system for operating a plurality of plasma and/or induction heating processing systems includes an operating unit that has a display device on which a graphic user interface can be displayed, at least two power generators that supply power to a plasma process or an induction heating process, and a network that connects the operating unit to the power generators to transmit signals between the operating unit and the power generators. The graphic user interface includes a static region and a dynamic region, and a selection device for selecting information to be displayed in the dynamic region.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: March 31, 2015
    Assignee: TRUMPF Huettinger GmbH + Co. KG
    Inventors: Thomas Pohl, Ulrich Heller
  • Patent number: 8990035
    Abstract: An instrument (1) and a method for detecting partial electric discharges involve acquiring a discharge signal (10), for example picked up by a direct-measuring impedance device (7) through a broadband HF acquisition channel (18), and acquiring the discharge signal (10) in a narrowband LF acquisition channel (180) complying with regulations, using on the LF acquisition channel (180) a trigger controlled in slave mode by a trigger of the broadband HF acquisition channel (18); they also involve acquiring another discharge signal (32) picked up by an indirect-measuring impedance device (8) through a second narrowband LF acquisition channel (180A) and comparing digital signals (34, 34A) generated in the first and second LF acquisition channels (180, 180A), in order to generate a balanced digital signal (36) without components representative of common mode electrical signals present in the measuring circuit.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: March 24, 2015
    Assignee: Techimp HQ S.R.L.
    Inventors: Stefano Serra, Gian Carlo Montanari, Fabiano Bettio
  • Publication number: 20150081235
    Abstract: 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.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 19, 2015
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, Armando Guzman-Casillas, Tony J. Lee, Veselin Skendzic, Bogdan Z. Kasztenny, David E. Whitehead
  • Publication number: 20150081236
    Abstract: 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.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 19, 2015
    Inventors: Edmund O. Schweitzer, III, Mangapathirao Venkata Mynam, Armando Guzman-Casillas, Veselin Skendzic, Bogdan Z. Kasztenny, David E. Whitehead
  • Publication number: 20150073735
    Abstract: 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.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 12, 2015
    Applicant: King Fahd University Of Petroleum And Minerals
  • Patent number: 8965591
    Abstract: A method for regenerating switching plans based on changing power distribution network conditions includes updating a power distribution network model in response to a power distribution network event, identifying areas of the power distribution network affected by the power distribution network event, identifying switching plans that are impacted by the power distribution network event and regenerating the switching plans that are impacted by the power distribution network event.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: February 24, 2015
    Assignee: General Electric Company
    Inventors: Ramon Juan San Andres, Atul Nigam
  • Patent number: 8963556
    Abstract: A system and method for detecting excess voltage drop (EVD) in a three-phase electrical distribution circuit includes a diagnostic system comprising a processor that is programmed to receive three-phase voltages and currents provided to terminals of the electrical machine, determine fundamental components of the three-phase voltages and currents provided to the terminals, and compute positive, negative, and zero sequence currents from the fundamental components.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: February 24, 2015
    Assignee: Eaton Corporation
    Inventors: Santosh Kumar Sharma, Xin Zhou, Steven Andrew Dimino, Supriya Karnani, Snehal Kale, Rahul Choudhary, Debsubhra Chakraborty
  • Patent number: 8949046
    Abstract: A system is provided to associate containers with handling equipment (HE) in a container storage facility. In the system an operation detector, such as a twistlock sensor that indicates when a container is picked up or dropped off, is installed on a first HE which is a piece of container handling equipment (CHE) that can lift the container. An event detector, such as a vibration sensor or distance measuring radar, is further installed on a second HE that is a tractor with an attached chassis for receiving and transporting a container. The event detector indicates when a container-operation-related event, such as a container pick up or drop off, occurred on the tractor chassis. The two detectors (operation and event) are used by a processor to associate the container with either the CHE or the tractor. The operation and event detectors can further be used in conjunction with position sensors such as a GPS sensor to accurately determine the position of the tractor and the CHE in a container yard.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: February 3, 2015
    Assignee: Mi-Jack Products, Inc.
    Inventors: Han-Shue Tan, Jihua Huang, Ke-Ren Chuang, Fanping Bu, Gregory Keith Warf
  • Patent number: 8949048
    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.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: February 3, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Gilbert Luna, Sébastien Louise
  • Patent number: 8941387
    Abstract: An electrical waveform is received over an electrical power line. A plurality of nominal electrical parameters are determined for the electrical power network and the plurality of nominal electrical parameters are associated with a state of the electrical power network in the absence of at least one transitory electrical fault in the network. Subsequently, a plurality of electrical parameters of the electrical waveform are sampled when the at least one transitory electrical fault exists in the network. A plurality of inductances are determined based at least in part upon a comparison of the nominal electrical parameters and the plurality of sampled electrical parameters. The plurality of inductances are representative of inductances present in the network when the at least one transitory electrical fault exists in the network. The plurality of inductances are analyzed to determine a distance and/or direction to the at least one electrical fault.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: January 27, 2015
    Assignees: Howard University, San Diego Gas & Electric Company
    Inventor: Charles Kim
  • Patent number: 8930782
    Abstract: Aspects of the invention relate to yield analysis techniques for generating root cause distribution information. Suspect information for a plurality of failing dies is first generated using a layout-aware diagnosis method. Based on the suspect information, potential root causes for the plurality of failing dies, and suspect feature weights and total feature weights for each of the potential root causes may then be determined. Next, the probability information of observing a particular suspect that is related to a particular root cause may be extracted. Finally, an expectation-maximization analysis may be conducted for generating the root cause distribution information based on the probability information and the suspect information. Heuristic information may be used to prevent the analysis from over-fitting.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: January 6, 2015
    Assignee: Mentor Graphics Corporation
    Inventor: Robert Brady Benware
  • Patent number: 8928489
    Abstract: Techniques and systems are described that assist in predicting, diagnosing, and/or managing an incident in a utility service area. A communication system is provided in the service area to communicate with nodes of the service area. Nodes of the service area may communicate with the communication system using a variety of different communication technologies and/or communication protocols. In some instances, the communication system may detect a communication technology and/or a communication protocol used by a node.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: January 6, 2015
    Assignee: Avista Corporation
    Inventors: Joshua Dominic DiLuciano, Erik Jon Lee, Robert David Cloward, Allen Glenn Cousins
  • Patent number: 8924832
    Abstract: A data storage system configured to efficiently search and update system data is disclosed. In one embodiment, the data storage system can attempt to correct errors in retrieved data configured to index system data. Metadata stored along with user data in a memory location can be configured to indicate a logical address associated in a logical-to-physical location mapping with a physical address at which user data and metadata are stored. The data storage system can generate modified versions of logical address indicated by the metadata and determine whether such modified versions match the physical address in the logical-to-physical mapping. Modified versions of the logical address can be generated by flipping one or more bits in the logical address indicated by the metadata. Efficiency can be increased and improved performance can be attained.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: December 30, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventor: Johnny A. Lam
  • Patent number: 8924033
    Abstract: The subject specification comprises a generalized grid security platform (GGSP) that can control power distribution and operations in a power transmission and distribution grid (PTDG) in real or near real time. The GGSP can receive data from one or more data sources, including a PMU(s) or an IED(s), which can obtain power system related data and provide at least a portion of such data to the GGSP at a subsecond rate. The GGSP can correlate data from the data sources based at least in part on a temporal, geographical, or topological axis. The GGSP can analyze the data, including performing predictive analysis, e.g., via simulation, root cause analysis, post mortem analysis, or complex event processing, when desired, to facilitate identifying a current or predicted future state of the PTDG, a cause or source of an abnormal condition, or a remedial action execution plan, new operation or maintenance guidance, etc.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: December 30, 2014
    Assignee: Alstom Grid Inc.
    Inventors: Eric Goutard, Spero Mensah
  • Patent number: 8924171
    Abstract: 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 miniaturized 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.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: December 30, 2014
    Assignee: European Aeronautic Defence and Space Company EADS France
    Inventors: Katell Moreau, Vincent Rouet, Sébastien Rolet