For Electrical Fault Detection Patents (Class 702/58)
  • Patent number: 11456698
    Abstract: A photovoltaic (“PV”) sensor for the early detection of potential induced degradation (“PID”) comprising a housing; a power source located within the housing; an electrical connection presented by the housing for electrically communicating the power source with a PV module; and wherein current supplied by the power source to the PV module is less than 10 mA.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: September 27, 2022
    Assignee: University of Cyprus
    Inventors: Michalis Florides, George Makrides, George E. Georghiou
  • Patent number: 11435212
    Abstract: A method for monitoring a measurement variable and performing predictive monitoring of a compliancy of a characteristic of a field device to a requirement is described. The method includes a step of determining a deviation between a measured value of a monitored variable and a reference value of the monitored variable. The deviation is indicative of a degree of compliancy to the requirement. The method also includes a step of applying a filter to the deviations based on the deviations and the filtered deviations. The method further includes a step of determining a noise superimposed on the filtered deviations. At the end of a monitoring interval, a time remaining until the deviations will exceed the deviation range is determined using a Monte Carlo simulation.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: September 6, 2022
    Inventor: Dimitri Vaissiere
  • Patent number: 11424617
    Abstract: A bypass mechanism for a photovoltaic module which switches out the electronics and switches in a bypass mechanism.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: August 23, 2022
    Assignee: Solaredge Technologies Ltd.
    Inventors: Meir Gazit, Israel Gershman, Ehud Kirmayer, Leon Kupershmidt, Meir Adest
  • Patent number: 11398336
    Abstract: A transformer assembly includes an electric transformer a temperature sensor system, and a computation unit for determining a thermal state of the electric transformer. The electric transformer includes a cooling device having at least one liquid coolant channel to absorb exhaust heat from the electric transformer a heat spreader for transferring heat from the liquid coolant to a heat dissipation surface of the heat spreader, and an air blower configured to effect an airstream along the heat dissipation surface. The temperature sensor system includes an entering coolant sensor for providing an entering coolant temperature signal, a leaving coolant sensor for providing a leaving coolant temperature signal, an entering airstream sensor for providing an entering airstream temperature signal, and a leaving airstream sensor for providing a leaving airstream temperature signal. The computation unit is configured to determine a thermal state of the transformer.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: July 26, 2022
    Assignee: Hitachi Energy Switzerland AG
    Inventors: Stephane Isler, Valter Porcellato
  • Patent number: 11381169
    Abstract: The technology described herein is directed to a DC input power supply unit with an auxiliary boost control circuit (or controller) that facilitates continuous supply of power to a standby output load of the power supply unit in a bootloader mode. More specifically, the auxiliary boost circuit (or controller) is configured to assume control of a primary power boost stage from a primary controller in a bootloader mode so that the power supply unit can continue to supply power to the standby output with a protection function regardless of the state of the power supply unit or primary controller.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: July 5, 2022
    Assignee: Astec International Limited
    Inventors: Chih-hao Hsu, Chang-Chieh Yu, Carl Walker, Chun-Wei Chang, Po-Tso Chen
  • Patent number: 11372045
    Abstract: Systems and methods to detect that a protective device is operating outside of a time inverse overcurrent tolerance region are described. For example, a central monitoring station may obtain a time inverse overcurrent tolerance region of a protective device on a power line. The central monitoring station may obtain a fault magnitude measurement and a fault duration measurement of a wireless line sensor on the power line. The central monitoring station may determine that the protective device is operating outside of the tolerance region based at least in part on the fault magnitude measurement and the fault duration measurement. The central monitoring station may provide a signal indicating that there is a potential issue with the protective device.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: June 28, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Shankar V. Achanta, Kei Hao
  • Patent number: 11362517
    Abstract: Determining direct current (DC) leakage current flowing through an insulating structure in a high voltage DC power system wherein the DC leakage current is a composite DC current having one or more high magnitude momentary spikes, and having a DC component and an alternating current (AC) component, wherein the AC component has a first rate of change, and wherein the DC component has a second rate of change less than the first, having (a) providing a waveform separator which is configured to receive the composite DC current flowing through the insulating structure and to separate the composite DC current into the corresponding DC component and AC component, and (i) receive at least one corresponding digital signal and the DC component, ii) analyze the at least one corresponding digital signal and the DC component, (iii) determine a resultant leakage current flowing through the insulating structure, (b) electrically connecting the waveform separator to the insulating structure, (c) separating, in the waveform s
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: June 14, 2022
    Assignee: Quanta Associates, L.P.
    Inventors: Zoran Bilic, David James Ball
  • Patent number: 11355910
    Abstract: Method and system allowing more accurate detection and identification of unwanted arcing include novel processing of signal voltage representing recovered power-line current. In one implementation, arc-faults are detected based on numerical analysis where individual cycles of line voltage and current are observed and data collected during each cycle is processed to estimate likelihood of presence of arc-event within each individual cycle based on pre-defined number of arc-events occurring within pre-defined number of contiguous cycles.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: June 7, 2022
    Assignee: Hubbell Incorporated
    Inventors: William Vernon Miller, III, Gary Michael Miller
  • Patent number: 11353484
    Abstract: A current sensor diagnosing apparatus for diagnosing an error of a plurality of current sensors connected to a secondary battery cell. The current sensor diagnosing apparatus may diagnose an error of a current sensor in the same way regardless of the type of a system using the current sensor, the type of a current source, a voltage characteristic, or the like by diagnosing an error of current sensors using offset deviations and current values of two current sensors and may be particularly applied to various systems including a plurality of current sensors.
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: June 7, 2022
    Inventors: Ho-Deuk Choi, Hwa-Sub Lee
  • Patent number: 11353487
    Abstract: A method and an apparatus for detecting capacitance of a filter capacitor of an inverter are provided, wherein each output terminal of the inverter is connected to one terminal of a first filter capacitor through an inductor, and the other terminals of all first filter capacitors are interconnected. The method includes: outputting a first voltage {dot over (U)}1i through an ith output terminal of the inverter, i=1, 2 . . . N, i?j, 1?j?N, i and j are positive integers, and N is a total quantity of output terminals of the inverter; obtaining ?ik and determining a ratio of |?ij| to |?ik|, where ?ik is a current of an inductor connected to a kth output terminal when the ith output terminal outputs the first voltage {dot over (U)}1i, k=1, 2 . . . N, and k is a positive integer; and determining capacitance of a first filter capacitor connected to the jth output terminal based on ?ij, {dot over (U)}1i, and the ratio of |?ij| to |?ik|.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: June 7, 2022
    Inventors: Kai Yin, Zhiwu Xu, Yuandong Meng
  • Patent number: 11350548
    Abstract: An electric power substation includes one or more primary relay panels located at a substation site and susceptible to damage caused by radiated or coupled electromagnetic energy, and an electromagnetic pulse mitigation module located at the substation site and comprising a continuous conductive enclosure that is impervious to the radiated or coupled electromagnetic energy. One or more backup relay panels are housed within the electromagnetic pulse mitigation module and capable of assuming operation of the one or more primary relay panels.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: May 31, 2022
    Assignee: CenterPoint Energy, Inc.
    Inventors: Eric D. Easton, Kevin J. Bryant
  • Patent number: 11349299
    Abstract: A system includes a transformer rectifier unit (TRU) having three inputs, a first AC bus configured to supply power to a first of the three inputs, a second AC bus configured to supply power to a second of the three inputs, and a third AC bus configured to supply power to a third of the three inputs. The system includes a power quality sense device electrically connected to each of the first, second and third AC busses. The system includes an electrically held contactor electrically connected between the TRU and the power quality sense device. The electrically held contactor is configured and adapted to be switched ON or OFF depending on whether the power quality sense device is energized or de-energized.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 31, 2022
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Robert L. Seagren
  • Patent number: 11341884
    Abstract: Provided is a data driving circuit, including: a pixel current generation circuit including an input terminal and an output terminal and configured to generate a pixel current based on a data voltage inputted via the input terminal, wherein the output terminal of the pixel current generation circuit is configured to be connected to a pixel circuit; and a first operational amplifier including a first input terminal connected to the output terminal of the pixel current generation circuit, a second input terminal, and an output terminal. A first voltage is inputted via the second input terminal of the first operational amplifier and is positively related to the data voltage, and the output terminal of the first operational amplifier is configured to be connected to the pixel circuit; and wherein the first operational amplifier is configured to generate a bias current based on the first voltage.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: May 24, 2022
    Assignee: SeeYA Optronics Co., Ltd.
    Inventors: Haodong Zhang, Ping-Lin Liu
  • Patent number: 11334513
    Abstract: In an embodiment, a method includes receiving in parallel first data and second data; and delivering in series the first and second data, where the first data comprises electric power delivery configuration data. In some embodiments, delivering in series the first and second data includes delivering the first and second data wirelessly.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: May 17, 2022
    Assignee: STMicroelectronics SA
    Inventor: Pierre Busson
  • Patent number: 11333699
    Abstract: A method for characterizing a fault in a transmission line network, the method includes the steps of: obtaining a first measured time reflectogram Rm from a signal previously injected into the network, obtaining a second time reflectogram Rs corresponding to the network in the absence of faults, determining the time difference Rref between the first measured time reflectogram Rm and the second time reflectogram Rs, identifying, in the time difference Rref, an amplitude peak characterizing the presence of a fault and its time abscissa indicating the position of the fault, simulating a plurality of time reflectogram hypotheses each corresponding to the network comprising a fault at the identified position, each hypothesis being associated with a different value of at least one parameter characteristic of the fault, selecting the time reflectogram hypothesis closest to the time difference Rref.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: May 17, 2022
    Inventors: Moussa Kafal, Wafa Ben Hassen
  • Patent number: 11320492
    Abstract: State estimation in an electric power system includes acquiring electrical measurements from the electric power system at a reporting rate of the electrical measurements, processing the electrical measurements into sequence data including positive sequence data, processing positive sequence data by an observable state estimator to generate a plurality of estimated states including a plurality of estimated observable states, parameters of the observable state estimator being updated by a first training module in a first time thread, processing the plurality of estimated states by an unobservable state estimator to generate a plurality of estimated unobservable states, parameters of the unobservable state estimator being updated by a second training module in a second time thread independent of the first time thread, and outputting a plurality of final estimated states generated by concatenating the plurality of estimated observable states and the plurality of estimated unobservable states.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: May 3, 2022
    Assignees: Global Energy Interconnection Research Institute Co. Ltd, State Grid Coporation of China Co. Ltd, State Grid Jiangsu Electric Power Co., LTD., State Grid ShanXi Electric Power Company
    Inventors: Yingzhong Gu, Guanyu Tian, Chunlei Xu, Qibing Zhang, Ruisheng Diao, Di Shi
  • Patent number: 11316516
    Abstract: A circuit fault detection apparatus includes an AD conversion circuit, a corrector, first and second determination devices, and a fault detector. The AD conversion circuit detects a voltage corresponding to a current or a voltage applied to the circuit fault detection element, and converts the voltage to a digital value. The corrector corrects a measurement value to a corrected measurement value. The first determination device determines whether or not the electric circuit has the fault, based on a comparison between an uncorrected measurement value and an uncorrected threshold value. The second determination device determines whether the electric circuit has the fault, based on a comparison between the corrected measurement value and a corrected threshold value. The fault detector detects the fault in the electric circuit, based on a condition that at least one of the first or second determination devices determines that the electric circuit has the fault.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: April 26, 2022
    Inventors: Yuichiro Nakano, Yohei Nakakura
  • Patent number: 11315083
    Abstract: An asset management method for a substation includes deriving an optimal management plan by each element of the substation depending on integrity of the each element of the substation and deriving an optimal unique reliability model for each element of the substation through a process of compensating a reference reliability model of each substation type and an apparatus executing the method.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: April 26, 2022
    Assignee: Hyosung Heavy Industries Corporation
    Inventors: Jae Ryong Jung, Eun Tae Lyu
  • Patent number: 11309699
    Abstract: A control system for and a method of fault isolation and electrical power restoration on an electrical network are provided and comprise: a plurality of electrical power supply facilities connectable to a region of a network, the region comprising a plurality of segments, and each segment being connectable to one or more neighbouring segments by a respective switching device; and the method including the steps of: detecting a fault condition within the region; operating the plurality of switching devices connecting the segments within the region so as to disconnect those segments from one another; performing a reconnection routine for each of a plurality of reconnection zones, being run concurrently.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: April 19, 2022
    Assignee: Electricity North West Property Limited
    Inventor: Steve Cox
  • Patent number: 11293994
    Abstract: An earth leakage circuit breaker and a method of controlling the same are disclosed. An earth leakage circuit breaker according to the present disclosure can detect a type of leakage current and output the type of the leakage current in various forms such that a user can recognize the type of the leakage current. Therefore, the user can easily recognize whether or not the leakage current has occurred and the type of the leakage current. This may facilitate the user to recognize the cause of the leakage and take an effective measure for preventing an accident.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: April 5, 2022
    Assignee: LSIS CO., LTD.
    Inventors: Sunggyu Nam, Jongung Lim
  • Patent number: 11287285
    Abstract: A system may include a device including a sensor configured to measure a parameter of a resource distributed along a distribution line of the resource distribution system and one or more validation devices. Each validation device includes a sensor configured to measure the parameter of the resource distributed along the distribution line or a related parameter. When the device detects that the parameter is out-of-range condition, it sends a query to the validation devices requesting information on the parameter or the related parameter. When the information regarding the parameter or related parameter also indicates an out-of-range condition, then the system validates the out-of-range condition. After validating the condition, the system may control a resource regulation device to adjust the parameter.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: March 29, 2022
    Assignee: Landis+Gyr Innovations, Inc.
    Inventor: Randy Edwards
  • Patent number: 11275101
    Abstract: The present disclosure relates to spectral analysis in wireless current sensors. For example, a wireless current sensor (WCS) includes current transformer windings that harvest electrical energy from a power line and allow the WCS to obtain current measurements of the power line. The WCS includes a processor that obtains the current measurements of the power line via the current transformer windings. The processor generates a frequency domain representation of the current on the power line using the current measurements. The processor sends a wireless signal indicating results from the frequency domain representation to an intelligent electronic device (IED) that monitors the power line to allow the TED to analyze the results for anomalies.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: March 15, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: James Mobley
  • Patent number: 11243243
    Abstract: A circuit for arc detection in a direct current and a microprocessor to resolve a problem of low accuracy of a detection result of an existing circuit for arc detection in a direct current, where the circuit includes a current sampling circuit, a first circuit, a second circuit, and a microprocessor. The current sampling circuit is configured to perform current sampling on the direct current, and output a current sampling signal of the direct current. The first circuit is configured to output a time domain signal including at least one pulse. The second circuit is configured to output a frequency domain signal of the current sampling signal after amplifying and filtering the current sampling signal. The microprocessor is configured to determine that an arc exists in the direct current when a counting result of the quantity of arc events meets a preset condition.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: February 8, 2022
    Inventors: Jintao Han, Shengjie Zhang
  • Patent number: 11224150
    Abstract: A method of operating a public utility facility includes receiving a commodity at a processing facility communicably coupled to a control system that includes primary electrical components configured to operate the processing facility, and transitioning operation of the processing facility to an electromagnetic pulse mitigation module communicably coupled to the processing facility via a fiber optic line when the primary electrical components are rendered inoperable. The electromagnetic pulse mitigation module comprises a continuous conductive enclosure that is impervious to radiated and coupled electromagnetic energy. Operation of the primary electrical components is then assumed with one or more backup electrical components housed within the electromagnetic pulse mitigation module.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: January 11, 2022
    Assignee: CenterPoint Energy, Inc.
    Inventors: Eric D. Easton, Kevin J. Bryant
  • Patent number: 11216970
    Abstract: An image processing apparatus includes a creation unit creating output image data to be used in an image forming unit forming an output image on a recording material by using original image data input from an outside, an acquisition unit acquiring defect position data related to a position of a defect on the recording material which is attributable to the image forming unit, and an output unit outputting display image data to be used for display on a screen of a display unit by using the output image data and the defect position data.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: January 4, 2022
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Kentaro Ikeda, Kodai Suzuki, Hisao Komazawa, Satoshi Misawa
  • Patent number: 11209474
    Abstract: A method for locating and clearing phase faults in a micro-grid in off-mode. The method includes determining a surveillance area of a microgrid having at least two busbars to monitor; determining all source feeders and load feeders of the surveillance area; acquiring measurement data comprising current magnitude for all source feeders and load feeders; and monitoring the at least two busbars in the surveillance area for a voltage dip in one of phase-to-phase or phase-to-neutral voltages. The method further includes, on detecting a voltage dip on the monitored busbars, determining a defect phase having a minimum phase-to-neutral voltage; and performing current analysis for the defect phase.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: December 28, 2021
    Assignee: Schneider Electric Industries SAS
    Inventors: Philippe Alibert, Vanya Ignatova
  • Patent number: 11188863
    Abstract: Aspects of the subject disclosure may include, for example, embodiments include receiving a first trouble ticket reporting a first service outage of a communication network and a second trouble ticket reporting a second service outage of the communication network. Further embodiments can include determining a first customer impact according to the first service outage and determining a second customer impact according to the second service outage. The first customer impact is determined by a degradation of quality metrics, a site priority, and a number of complaints due to each service outage. Additional embodiments can include identifying that the second customer impact is higher than the first customer impact. Also, embodiments can include prioritizing a resolution of the second trouble ticket over the first trouble ticket according to the second customer impact being higher than the first customer impact. Other embodiments are disclosed.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: November 30, 2021
    Assignees: AT&T Intellectual Property I, L.P., AT&T Mobility II LLC
    Inventors: He Yan, Lynn Lopez, Jason Pipkin, Kathryn Childs, Chichi Boderoux, Carla Sykes, Kevin Wilkins, Robert Samson, Sarat Puthenpura, Zihui Ge
  • Patent number: 11176289
    Abstract: Techniques and apparatus for parameter error detection in a power system based on state estimation are described. In one embodiment, for example, an efficient process may be used to derive and compute only the necessary subset of the gain matrix and covariance matrix, thus avoiding the computation and storage of large dense matrices. The described efficient process can be applied either to single-scan or multiple-scan schemes. Other embodiments are described.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: November 16, 2021
    Assignee: Northeastern University
    Inventors: Ali Abur, Yuzhang Lin
  • Patent number: 11167645
    Abstract: A method for inspecting a traction power network is provided based on a platform which includes a device body of an inspection device for a traction power network apparatus. A power switch is disposed on an outer surface of the device body near a front end thereof, in which a sensitive galvanometer is disposed on the power switch. One end of the sensitive galvanometer is fixedly connected to a temperature sensor coupled to a controller. The controller is coupled to a 4G first communication module coupled to a 4G network. The 4G network is coupled to a processing platform coupled to the 4G network through a 4G second communication module. Other methods and structures are combined to avoid deficiencies in the prior art, such as poor speed and long time in the temperature signal transmission and avoid a controller without meeting requirements for efficient and timely temperature signal transmission.
    Type: Grant
    Filed: December 8, 2019
    Date of Patent: November 9, 2021
    Assignee: Nanjing Institute of Railway Technology
    Inventors: Qihou Song, Honggao Feng, Baichuan Xu
  • Patent number: 11156651
    Abstract: Techniques are described for a method for detecting a fault. The method includes receiving, by a receiving electronic device, via a differential pair transmission line, from a transmitting electronic device, an electrical signal. The method further includes converting, by a receiving (Rx) serializer/deserializer (SerDes) operating at the receiving electronic device, the received electrical signal into a received digital electrical signal. The method further includes, determining, by one or more processors, an electrical signature of the received electrical signal from the received digital electrical signal when the received electrical signal is received by the receiving electronic device. The method further includes determining, by the one or more processors, based on the electrical signature, a position of a fault between the receiving electronic device and the transmitting electronic device. The fault causes the received electrical signal to be different than the transmitted electrical signal.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: October 26, 2021
    Assignee: Juniper Networks, Inc.
    Inventors: David P. Chengson, Ranjeeth Doppalapudi
  • Patent number: 11156655
    Abstract: At least one monitoring element may be configured to sense a current drawn by equipment being monitored from at least one power source and produce a monitoring signature representing the sensed current. At least one sensor may be configured to output a detection signal in response to a change in a monitored condition. At least one circuit element may be placed in series between the at least one power source and the equipment being monitored. The at least one circuit element may be configured to couple the at least one power source and the equipment being monitored by default and decouple the at least one power source from the equipment being monitored in response to receiving the detection signal. The monitoring signature may include a feature representing the change in the monitored condition in response to the at least one circuit element decoupling the at least one power source from the equipment being monitored.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: October 26, 2021
    Assignee: Siemens Mobility Pty Ltd.
    Inventor: Stephen Baker
  • Patent number: 11145352
    Abstract: Memory devices and systems with adjustable through-silicon via (TSV) delay, and associated methods, are disclosed herein. In one embodiment, an apparatus includes a plurality of memory dies and a TSV configured to transmit signals to or receive signals from the plurality of memory dies. The apparatus further includes circuitry coupled to the TSV and configured to introduce propagation delay onto signals transmitted to or received from the TSV. In some embodiments, the apparatus includes additional circuitry configured to activate, deactivate, adjust at least a portion of the circuitry, or any combination thereof, to alter the propagation delay. In this manner, the apparatus can align internal timings of memory dies of the plurality of memory dies.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: October 12, 2021
    Assignee: Micron Technology, Inc.
    Inventors: John H. Gentry, Michael J. Scott, Greg S. Gatlin, Lael H. Matthews, Anthony M. Geidl, Michael Roth, Markus H. Geiger, Dale H. Hiscock, Evan C. Pearson
  • Patent number: 11143685
    Abstract: The present subject matter enables early or real-time detection of anomalies in electric networks. In various applications, the system detects anomalies, such as electricity theft, electricity surge, etc. It solves the difficult-to-detect problems in an electrical network, where anomalies like electricity theft or electrical surge may not be found until it has raised numerous concerns or complaints, or has created a significant impact on infrastructure functionality, service quality, or cost. In addition, the present subject matter decreases the requirement for large number of sensors and provides more cost effective and scalable solutions. The present subject matter provides a method for determining where a detected anomaly is occurring within an electrical network. Variations of the present subject matter include anomaly identification systems for addressing anomalies in large networks.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: October 12, 2021
    Inventors: Golshan Golnari, Saber Taghvaeeyan, Jennifer F. Schumacher
  • Patent number: 11127480
    Abstract: A method for identifying a short circuit at a circuit node may include activating a current source to drive a signal at the circuit node, and sampling a voltage level at the circuit node at a particular time. The method may further include determining that the circuit node is not shorted to another circuit node if the voltage level at the first circuit node exceeds a threshold value; and determining that the first circuit node is shorted to another circuit node if the voltage level at the first circuit node does not exceed the threshold value.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: September 21, 2021
    Assignee: Dell Products L.P.
    Inventors: Isaac Q. Wang, James Petivan, Earl Boone
  • Patent number: 11099551
    Abstract: Example implementations described herein involve a system for maintenance predictions generated using a single deep learning architecture. The example implementations can involve managing a single deep learning architecture for three modes including a failure prediction mode, a remaining useful life (RUL) mode, and a unified mode. Each mode is associated with an objective function and a transformation function. The single deep learning architecture is applied to learn parameters for an objective function through execution of a transformation function associated with a selected mode using historical data. The learned parameters of the single deep learning architecture can be applied with streaming data from with the equipment to generate a maintenance prediction for the equipment.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: August 24, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Kosta Ristovski, Chetan Gupta, Ahmed Farahat, Onur Atan
  • Patent number: 11093678
    Abstract: A method is disclosed to simulate operation of a grid structure. The method includes specifying a type of simulation to be performed and at least one initial condition with a user interface of a device such as a mobile device, where the grid structure comprises at least one of a power generation grid and a power distribution grid. The method further includes transmitting the specified type of simulation and the at least one initial condition from the user device to a computing platform; receiving from the computing platform a result of the simulation at the user device; and visualizing the result of the simulation with the user interface. The type of simulation can be an N-k contingency analysis simulation, where k is equal to zero, 1 or greater than 1.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: August 17, 2021
    Assignee: International Business Machines Corporation
    Inventors: Robert F. Enenkel, Michael P. Perrone
  • Patent number: 11085962
    Abstract: The disclosure discloses a lookup table-based circuit aging detection sensor, including a control circuit, two voltage controlled oscillators (VCOs), two shaping circuits, a phase comparator, a 3-digit voter, a beat-frequency oscillator, an 8-digit counter, a latch, a lookup table array and a digital-analogue converter. The control circuit respectively connects with the phase comparator, the 3-digit voter, the 8-digit counter, the first and the second VCOs. The first and second VCOs connect with the first and second shaping circuits respectively. The first and second shaping circuits connect with the phase comparator. The phase comparator connects with the 3-digit voter. The 3-digit voter connects with the beat-frequency oscillator. The beat-frequency oscillator respectively connects with the 8-digit counter and the latch. The 8-digit counter connects with the latch. The latch connects with the lookup table array. The lookup table array connects with the digital-analogue converter.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: August 10, 2021
    Assignee: Ningbo University
    Inventors: Pengjun Wang, Haiming Zhang, Yuejun Zhang, Huihong Zhang
  • Patent number: 11085955
    Abstract: A system for energy metering with temperature monitoring.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: August 10, 2021
    Assignee: Veris Industries, LLC
    Inventor: Martin Cook
  • Patent number: 11068589
    Abstract: A system for providing security in a computer system is provided. The system includes a plurality of ring oscillators and one or more logic circuits. The ring oscillators are equipped with a respective plurality of counters to count impulses of oscillating outputs of the ring oscillators. The one or more logic circuits start and stop the respective plurality of counters over repeated counting periods, and select a group of ring oscillators from the plurality of ring oscillators. The one or more logic circuits also determine a correlation between oscillating outputs of the group of ring oscillators. The one or more logic circuits further generate a notification indicating interference in the group of ring oscillators and thereby the plurality of ring oscillators when the correlation is above a predefined threshold correlation.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: July 20, 2021
    Inventor: Laszlo Hars
  • Patent number: 11061915
    Abstract: One embodiment provides a system for facilitating anomaly detection and characterization. During operation, the system determines, by a computing device, a first set of testing data which includes a plurality of data points, wherein the first set includes a data series for a first variable and one or more second variables. The system identifies anomalies by dividing the first set into a number of groups and performing an inter-quartile range analysis on data in each respective group. The system obtains, from the first set, a second set of testing data which includes a data series from a recent time period occurring before a current time, and which further includes a first data point from the identified anomalies. The system classifies the first data point as a first type of anomaly based on whether a magnitude of a derivative of the second set is greater than a first predetermined threshold.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: July 13, 2021
    Assignees: Palo Alto Research Center Incorporated, Panasonic Corporation
    Inventors: Jungho Park, Ajay Raghavan, Ryan A. Rossi, Yosuke Tajika, Akira Minegishi, Tetsuyoshi Ogura
  • Patent number: 11062212
    Abstract: A system and method is disclosed for using AMI smart meter messaging types and data mining decision trees to determine if local equipment failure is present. The system and method may be used to predict impending failure based upon smart meter message behaviors and to create proactive investigation tickets. The predictions models may be generated from a database of smart meter messaging and customer outage reports. The system and method can be applied to detect failures of higher level device equipment and may be incorporated into customer service processes. The system and method may also be used to determine customer owned equipment failures for referral to electricians.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: July 13, 2021
    Assignee: Florida Power & Light Company
    Inventors: Yinuo Du, Andrew Wright Kirby, Adam David Meranda
  • Patent number: 11050239
    Abstract: A method for detecting fault direction of a transmission line of an AC power system and a control system using the same.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: June 29, 2021
    Assignee: ABB Power Grids Switzerland AG
    Inventors: Kai Liu, Jianping Wang, Youyi Li
  • Patent number: 11038454
    Abstract: A power conversion device includes a switching circuitry configured to supply a driving alternating current (AC) power to a motor of a controlled object that includes the motor and a movable part driven by the motor, and detect an abnormality in the controlled object based on the index information acquired.
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: June 15, 2021
    Inventor: Hirofumi Kinomura
  • Patent number: 11016133
    Abstract: A method of identifying an arc fault in a wire operably connected between a controller and a load. The method includes operably connecting a sense wire to the wire in close proximity to a load supplied by the controller via the wire, measuring a first voltage on the wire at the load via the sense wire, measuring a second voltage on the wire at an output interface of the controller and measuring a current in the first wire. The method also includes identifying any differences between the voltage on the wire measured at the load and the second voltage on the wire measured at the output interface, ascertaining any anomalies in the current measured in the wire, and correlating the differences between the first voltage and the second voltage with any anomalies in the current to identify an arc fault.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: May 25, 2021
    Inventors: Jimmy Peralta, John A. Dickey
  • Patent number: 11009931
    Abstract: The present disclosure relates to systems and methods of predicting voltages for various contingencies. For example, a monitoring system may include a processor that acquires at least one contingency of an electric power delivery system. The processor may acquire an expected control action based on the at least one contingency from controllers/IEDs. The processor may predict a voltage of at least one bus of the electric power delivery system by simulating the change in the state of the electric power delivery system caused by the expected control action. The processor may determine that the voltage of the at least one bus is predicted to violate one or more operational settings of the electric power delivery system if the at least one contingency were to occur. The processor may provide an indication that the voltage violates the one or more operational settings on a display of the electronic device.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: May 18, 2021
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Abdel Rahman Khatib, Niannian Cai
  • Patent number: 10998072
    Abstract: Systems and methods for configurable voltage regulator (VR) controllers. In some embodiments, an Information Handling System (IHS) may include: a processor; and a voltage regulator (VR) coupled to the processor, the VR configured to: identify, via a VR controller, a number of phases coupled to the voltage regulator in response to detection of a power-on-reset event; and select, via the VR controller, one of a plurality of different configuration files to be applied to the voltage regulator in response to the identification.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: May 4, 2021
    Assignee: Dell Products, L.P.
    Inventors: Mehran Mirjafari, Bhavesh Govindbhai Patel, John J. Breen, Lei Wang
  • Patent number: 10984106
    Abstract: The disclosed embodiments provide a system that detects execution of malicious cryptomining software in a target computing system. During operation, the system monitors target electromagnetic interference (EMI) signals generated during operation of the target computing system. Next, the system generates a target EMI fingerprint from the target EMI signals. The system then compares the target EMI fingerprint against a set of malicious EMI fingerprints for different pieces of malicious cryptomining software to determine whether the target computing system is executing malicious cryptomining software.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: April 20, 2021
    Assignee: Oracle International Corporation
    Inventors: Kenny C. Gross, Andrew J. Lewis, Guang C. Wang, Michael H. S. Dayringer
  • Patent number: 10976357
    Abstract: A method for determining the fault location of a ground fault relating to a line of a three-phase electrical energy supply network with an ungrounded neutral point, in which current and voltage values are measured at one line end of the line. Following the occurrence of a ground fault on the line, the location of the fault is defined using the measured current and voltage values. The measured current and voltage values are converted into ?-components and 0-components of a Clarke transformation, a location-dependent characteristic function of ?-component and 0-component fault voltage values is defined in each case using the converted components and a propagation model for travelling waves on the line. The fault location is determined to be the location at which the two characteristic functions exhibit the closest match.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: April 13, 2021
    Assignee: Siemens Aktiengesellschaft
    Inventors: Cezary Dzienis, Andreas Jurisch
  • Patent number: 10969813
    Abstract: In some implementations, a method is provided. The method may allow a powered device to determine the maximum power available from power supply equipment. The method includes determining the length of a cable connecting the powered device to the power supply equipment based on the resistance of the cable. The method further includes determining the maximum power available to the powered device based on the length of the cable. The powered device may then be operated based on the maximum power available.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: April 6, 2021
    Assignee: Arista Networks, Inc.
    Inventors: Mehran Ataee, Peter Parkinson, Kumar Narayanan
  • Patent number: 10962449
    Abstract: A rotary machine diagnostic device has a current acquisition unit that acquires current from a sensor, which measures the driving current of a rotary machine driving a machine to be driven; a sampling unit that performs sampling of the acquired driving current; a frequency range conversion unit that converts data concerning the time range subjected to sampling into a frequency range; a sideband detection unit that sets the driving current as a carrier wave in the frequency range, and detects, as a sideband, the spectrum appearing on each side of the carrier wave subjected to amplitude modulation; and an abnormality detection unit that detects whether or not there are abnormalities in the rotary machine and the machine to be driven on the basis of the difference in frequency between the sideband frequency detected by the sideband detection unit and the frequency of the carrier wave.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: March 30, 2021
    Assignee: Hitachi, Ltd.
    Inventors: Munetoshi Unuma, Junsuke Fujiwara