Feeder Protection In Distribution Networks Patents (Class 361/62)
  • Patent number: 10324132
    Abstract: Systems and methods for power line event zone identification are disclosed. Power line event zone identification may include receiving measured data corresponding to a signal measured on a power line, determining from the measured data that a power line event has occurred, and identifying a probable one of at least two monitoring zones in which the power line event occurred. The at least two monitoring zones may be defined for an Intelligent Electronic Device (IED). The systems may include an IED connected to the power line and a processor linked to the IED.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: June 18, 2019
    Assignee: ABB Inc.
    Inventors: Kari Saarinen, Mirrasoul Mousavi, James Stoupis, John McGowan
  • Patent number: 10317452
    Abstract: A testing device tests an intelligent electronic device of a power system. A PC generates failure data by performing: simulation calculation for a CT and a PT with respect to current waveform data of a current transformer and voltage waveform data of a potential transformer based on a characteristic of an instrument transformer; and simulation calculation for an MU with respect to the current waveform data of the current transformer and the voltage waveform data of the potential transformer based on a characteristic of the MU. The testing device acquires device information data indicating a circuit breaker of the power system, in synchronization with the failure data. The testing device transmits the failure data and the device information data to the intelligent electronic device via a process bus in accordance with a setting of outputting data to the process bus and a setting of sampling.
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: June 11, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Shigetoo Oda
  • Patent number: 10256745
    Abstract: A multilevel converter converting between AC and DC includes a phase leg having a first and a second phase arm, the first phase arm being connected between a first pole having a first potential and a first AC terminal and the second phase arm being connected between the first AC terminal and a second potential, where the phase arms include half-bridge and full-bridge cells, where each cell includes at least one energy storage element for providing the voltage contribution and cell switching units with cell switches and anti-parallel diodes for controlling the voltage contribution, where the full-bridge cells include a bypass switch controllable to bypass the corresponding energy storage element, and when a phase-to-ground fault occurs the cell switches are blocked and the bypass switches activated with a delay in relation to the blocking.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: April 9, 2019
    Assignee: ABB SCHWEIZ AG
    Inventors: Alireza Nami, Jiaqi Liang, Frans Dijkhuizen, Liwei Wang
  • Patent number: 10247356
    Abstract: A configurable industrial safety relay device allows individual adjustment of rated input currents for each safety input. The safety relay device can support a number of programmable configuration settings or parameters, including parameters that allow a desired input current to be individually selected for each safety input. In this way, an input current can be selected for each safety input that is appropriate for the safety circuit being monitored by the safety input. In particular, an input current can be selected that ensures reliable detection of the safety signal by the safety input while substantially minimizing power consumption by the safety relay device.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: April 2, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Norbert Machuletz, Thomas Helpenstein, Oliver Heckel, Rudolf Laurenz Papenbreer
  • Patent number: 10211669
    Abstract: A bypass device is used to bypass one or more automatic transfer switches mounted in an automatic transfer switch cabinet. The bypass device is physically coupled to one or more input power sources and to each respective output connection of a plurality of automatic transfer switches in the automatic transfer switch cabinet. The bypass device selectively feeds electrical power to one or more loads associated with a limited selection of automatic transfer switches to be bypassed. The bypass device comprises a selector device configured to route power from an input power source to respective output connections of the limited selection of automatic transfer switches to be bypassed. A plurality of output breakers are coupled to separate power outlets of each of the plurality of automatic transfer switches to isolate the respective automatic transfer switches.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: February 19, 2019
    Assignee: Amazon Technologies, Inc.
    Inventors: Kelsey Michelle Wildstone, Peter George Ross, Yuan Kong, Robin McCulloch, Richard Arvel Stevens
  • Patent number: 10193896
    Abstract: An electronic control unit is connected to an in-vehicle network bus in an in-vehicle network system including a plurality of apparatuses that perform communication of frames via the bus. The electronic control unit includes a first control circuit and a second control circuit. The first control circuit is connected to the bus via the second control circuit over wired communication and/or wireless communication. The second control circuit performs a first determination process on a received frame received from the bus to determine the conformity with a first rule related to at least a reception interval, and, upon determining that the received frame conforms to the first rule, executes a predetermined process based on the content of the received frame. The first control circuit performs a second determination process on the received frame, received via the second control circuit, to determine the conformity with a second rule different from the first rule.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: January 29, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Yoshihiro Ujiie, Jun Anzai, Yoshihiko Kitamura, Masato Tanabe, Hideki Matsushima, Tomoyuki Haga, Takeshi Kishikawa, Ryota Sugiyama
  • Patent number: 10193381
    Abstract: A load management module for disconnecting continuous loads for a predetermined amount of time when an excessive load is experienced to permit critical intermittent loads to remain energized. The load management module has a first group of relays and a second group of relays each connected to various intermittent loads (e.g., lighting branch circuits) and each controlled by a timer. The load management module activates the relays when a maximum power output of a secondary power source is exceeded. An automatic transfer switch capable of operating with larger disconnect/breaker sizes (e.g., 200 amps) for larger emergency backup systems. The automatic transfer switch comprises a plate operably connected to a drive system and a pair of breakers.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: January 29, 2019
    Assignee: Reliance Controls Corporation
    Inventor: Neil A. Czarnecki
  • Patent number: 10181714
    Abstract: The disclosed methods and systems employ a nonprobability-based detection scheme that measures conditions (e.g., voltage or current) at multiple locations on a circuit, such as a branch circuit, to detect for a presence of an arc fault condition. A centralized processing system, such as a controller (120), receives information corresponding to a branch origin voltage or current measurement sensed by a sensor (114, 116) at a branch origin upstream of the plurality of end-use devices (150) on the branch circuit (e.g. at a circuit breaker defining the branch), and receives information corresponding to a downstream voltage or current measurement at each of the end-use devices sensed by a corresponding downstream sensor (152, 154).
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: January 15, 2019
    Assignee: SCHNEIDER ELECTRIC USA, INC.
    Inventors: Jeremy D. Schroeder, Joseph Beierschmitt
  • Patent number: 10141774
    Abstract: The present invention disclose a charging circuit including: a first input/output end of a wired connection module is configured to connect to an output end, a second input/output end of the wired connection module connects to a first input end of a switch circuit, and the second input/output end connects to a first input/output end; a first input end of a control circuit connects to the second input/output end, and an output end connects to an enabling end of a wireless charging module; an output end connects to a second input end of the switch circuit; a first output end connects to an input/output end; a second input/output end of the shunt circuit connects to the input/output end, a third end of the shunt circuit connects to the output end; an output end of the charging management module is configured to connect to a battery.
    Type: Grant
    Filed: March 4, 2014
    Date of Patent: November 27, 2018
    Assignee: Huawei Device (Dongguan) Co., Ltd.
    Inventors: Wenju Liu, Zhonghui Peng, Jiangtao Yang
  • Patent number: 10132871
    Abstract: A battery system includes a battery module having a plurality of assembled batteries. Battery monitoring circuits are provided to correspond to each of the assembled batteries of the battery module. A control circuit controls operation of the battery monitoring circuits. A first signal transmission path transmits signals that are input and output between the battery monitoring circuits and the control circuit. A first isolation element is connected to the control circuit, and a second isolation element is connected to the battery monitoring circuit. The first signal transmission path is isolated from the control circuit by the second isolation element. The electrical potential of the first signal transmission path is a floating potential in relation to the electrical potentials of the control circuit and battery monitoring circuits.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: November 20, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hikaru Miura, Mutsumi Kikuchi, Akihiko Kudoh, Tomonori Kanai
  • Patent number: 10121621
    Abstract: A controller for confirming the contact status of a latch relay embedded in an electric power meter according to the invention includes a microcomputer unit that is electrically connected to the latch relay for reading and providing the contact switching status information of the latch relay during a power failure, and read the contact switching status information stored during the power failure when a power recovers, and configured to output an opening control signal to the latch relay when the read contact switching status is an open state, and configured to output a closing control signal to the latch relay when the read contact switching status is a closed state; and a non-volatile memory that stores the contact switching status information of the latch relay provided by the microcomputer unit or provides the contact switching status information of the latch relay to the microcomputer unit during a power failure.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: November 6, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Hyungkyu Kim
  • Patent number: 10122291
    Abstract: A redundant control device of a high voltage direct current (HVDC) transmission system is provided. The redundant control device includes a first system and a second system that performs a function corresponding to that of the first system; and a first change over logic (COL) and a second COL that determine whether to switch between the first system and the system, wherein there are optical communication modules between the first system and the first COL, between the first COL and the second COL, and between the second system and the second COL to transmit and receive data, and the first COL and the second COL includes a monitoring control unit that checks a connection or wiring state of the optical communication modules and validity of transmission data.
    Type: Grant
    Filed: March 1, 2016
    Date of Patent: November 6, 2018
    Assignee: LSIS CO., LTD.
    Inventors: Seung Hun Lee, Jong Bae Kim, Eung Soo Kim
  • Patent number: 10090703
    Abstract: A converter module for use in a switchgear assembly for power distribution, has: one or more AC supply bus bars for providing AC power supply; one or more AC or DC power distribution bus bars for distributing power to loads; and one or more converter units for converting AC power from the AC supply bus bars to AC or DC power onto AC or DC power distribution bus bars, respectively.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: October 2, 2018
    Assignee: ABB AG
    Inventors: Hans-Peter Merkel, Matthias Forstbach, Andre Schaerer
  • Patent number: 10082816
    Abstract: The invention relates to a method of differential protection in the power distribution networks based on phase difference principles. The method comprises the following steps: collecting the current and voltage signals of each loading switch; calculating phase difference between the corresponding currents at two adjacent loading switches, wherein at least one of the two adjacent loading switches accords with ?I? max>n·?IT+?Idz; tripping the two adjacent loading switches if the phase difference corresponding to the two adjacent loading switches being greater than a threshold then a section between the two adjacent loading switches being determined as a fault section. The method only needs to calculate the phase difference between the corresponding currents at the two adjacent loading switches, and achieves the fault determination according to the phase difference being greater than the threshold.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: September 25, 2018
    Assignees: XJ GROUP CORPORATION, XJ ELECTRIC CO., LTD, XUCHANG XJ SOFTWARE TECHNOLOGIES LTD, JIANGSU ELECTRIC POWER COMPANY RESEARCH INSTITUTE, STATE GRID CORPORATION OF CHINA
    Inventors: Qiang Niu, Jingwan Liang, Shuai Jiang, Junhong Qiu, Huawei Jia, Meng Li, Lei Gao, Yongjian Tao, Yongxin Liu, Feng Li, Xintao Dong, Yake Xi
  • Patent number: 10074985
    Abstract: A solar and/or wind inverter that uses an ultracapacitor for grid stabilization. The ultracapacitor may be directly tied to, and placed between, a power source and an inverter. The ultracapacitor may supply power to a grid via the inverter during a reduction of power or a loss in power from the grid.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 11, 2018
    Assignee: The Aerospace Corporation
    Inventor: Edward J Simburger
  • Patent number: 10044285
    Abstract: Disclosed is an alternating current conversion circuit including an AC input end, an AC output end, an intelligent conversion circuit, a voltage sampling circuit and a master control circuit. The intelligent conversion circuit is configured to output a standard voltage inputted by the AC input end to the AC output end, and convert a non-standard voltage inputted by the AC input end into a standard voltage and output the standard voltage converted to the AC output end, under the control of the master control circuit. The voltage sampling circuit is configured to sample the voltage inputted by the AC input end and the voltage outputted by the intelligent conversion circuit. The invention provides an intelligent AC conversion, allowing the electronic devices which are designed for a single power grid to be adapted to various power grids.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: August 7, 2018
    Inventor: Wanglong Xiong
  • Patent number: 9972017
    Abstract: A method for tracking procedures performed on personal protection equipment (PPE) and actions of individuals includes the following steps. An article of PPE configured with a smart tag is provided to an individual prior to performance of a task. After the individual performs the task, the article of PPE is processed. Information is retrieved from the smart tag during at least one of: before, during and after processing the article of PPE. After the performance of the task, the individual's data is read and the individual enters into a designated area.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: May 15, 2018
    Assignee: 3M Innovative Properties Company
    Inventors: Luca D. Farioli Brioschi, Luis V. Ramirez Chaidez, Lawrence J. Ptasienski, Mark T. Anderson, Michael E. Hamerly
  • Patent number: 9967417
    Abstract: A sub-system determines, based on an input instruction to transition a power state of an information processing apparatus to a power saving state, a power state from a plurality of power states in which the sub-system can operate, and notifies the main system of a recovery period that corresponds to the determined power state and that the sub-system requires to recover from the determined power state. The main system determines, based on the recovery period notified from the sub-system, a power state that the main system transitions to from a plurality of power states in which the main system can operate.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: May 8, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Hideyasu Tomi
  • Patent number: 9963240
    Abstract: Described are power management systems having at least one fuel cell system, a power distribution unit, at least one galley insert, a galley network controller, a control panel, and/or at least one battery pack. The power management system compares a power output from the power distribution unit to a maximum load level and/or to a minimum load level, instructs the galley network controller to cycle the galley insert off and/or set an operation of the galley insert to a lower power consumption level when the power output approaches and/or is above the maximum load level, and instructs the galley network controller to cycle the galley insert on and/or set the operation of the galley insert to a higher power consumption level when the power output approaches and/or is below the minimum load level.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 8, 2018
    Assignee: Driessen Aerospace Group N.V.
    Inventors: Razmik Boodaghians, Yannick Brunaux, Adriaan Eijkelenboom, Andreas Hoogeveen, Jean-Paul Libis, Franck Masset, Andreas Metz, Frederic Muyu, Lucas Nastase, Achim Reeb
  • Patent number: 9929556
    Abstract: A fail-safe device may be coupled to a main device for actuating a switch responsive to a failure. The fail-safe device may include a fail-safe circuit, and an isolation trench surrounding the fail-safe circuit and isolating the fail-safe circuit from the main device. The fail-safe device may include an internal power supply connection, an internal reference voltage connection, a self-biased drive block configured to drive the at least one switch, and a receiver configured to receive failure signals from the main device.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: March 27, 2018
    Assignee: STMicroelectronics S.r.l.
    Inventors: Vanni Poletto, Manuel Gaertner, Sergio Lecce, Giovanni Luca Torrisi
  • Patent number: 9897662
    Abstract: A battery system includes a battery module having a plurality of assembled batteries. Battery monitoring circuits are provided to correspond to each of the assembled batteries of the battery module. A control circuit controls operation of the battery monitoring circuits. A first signal transmission path transmits signals that are input and output between the battery monitoring circuits and the control circuit. A first isolation element is connected to the control circuit, and a second isolation element is connected to the battery monitoring circuit. The first signal transmission path is isolated from the control circuit by the first isolation element and is isolated from the battery monitoring circuit by the second isolation element. The electrical potential of the first signal transmission path is a floating potential in relation to the electrical potentials of the control circuit and battery monitoring circuits.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: February 20, 2018
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hikaru Miura, Mutsumi Kikuchi, Akihiko Kudoh, Tomonori Kanai
  • Patent number: 9876427
    Abstract: Voltage applied to switching elements of a power conversion device is suppressed to be within a predetermined range. A power conversion device (1) includes a leg (31) in which switching elements (41, 42) are connected in series, a leg (32) in which switching elements (43, 44) are connected in series, a reactor (61) connected between the midpoint of the switching elements (41, 42) and the switching-element (43) end not connected to the switching element (44), a reactor (62) connected between the midpoint of the switching elements (43, 44) and the switching-element (42) end not connected to the switching element (41), and a DC power source (10) connected between the switching-element (41) end not connected to the reactor (61) and the terminal of the switching element (44) not connected to the reactor (62). Loads can be connected in parallel to the legs (31, 32).
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: January 23, 2018
    Assignee: TOYO ELECTRIC MFG. CO., LTD.
    Inventors: Takao Mori, Keiichi Uezono, Shingo Makishima
  • Patent number: 9846423
    Abstract: A single-wire safety system is provided that yields reliable safety device monitoring without the need for dual redundant signal channels. The safety system comprises a safety relay acting as a communications master device and one or more safety devices connected in series with the safety relay via a single-wire communication circuit. A smart tap device is used to interface safety devices that are not compliant with the single-wire protocol to the single-wire channel. The safety device or smart tap device farthest from the safety relay on the safety circuit modulates a safety signal with a recognizable pulse pattern that traverses the single-wire safety circuit to the safety relay via the intermediate safety devices or smart taps. The safety relay maintains safety mode as long as the pulse pattern is received and recognized. The architecture allows bi-directional communication of initialization, configuration, and diagnostic messages over the single-wire safety channel.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: December 19, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Suresh R. Nair, Wayne R. Foster, Alex Harris, Rudolf Laurenz Papenbreer, Norbert Machuletz, Oliver Heckel, Thomas Helpenstein, Van Duros
  • Patent number: 9841142
    Abstract: A single-wire safety system architecture is provided that yields reliable safety device monitoring without the need for dual redundant signal channels. The safety system comprises a safety relay acting as a communications master device and one or more compatible safety devices connected in series with the safety relay via a single-wire communication circuit. The safety device farthest from the safety relay on the safety circuit modulates a safety signal with a recognizable pulse pattern that traverses the single-wire safety circuit to the safety relay via the intermediate safety devices. The safety relay maintains safety mode as long as the pulse pattern is received and recognized. The architecture allows bi-directional communication of initialization, configuration, and diagnostic messages over the single-wire safety channel, and can also allow safety devices to insert prognostic data into the safety signal in order to convey health information while the system is in normal operation mode.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: December 12, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Suresh R. Nair, Wayne R. Foster, Alex Harris, Rudolf Laurenz Papenbreer, Norbert Machuletz, Oliver Heckel, Thomas Helpenstein, Van Duros
  • Patent number: 9797552
    Abstract: A single-wire safety system architecture is provided that yields reliable safety device monitoring without the need for dual redundant signal channels. The safety system comprises a safety relay acting as a communications master device and one or more compatible safety input devices connected in series with the safety relay via a single-wire communication circuit. The safety input device farthest from the safety relay on the safety circuit modulates a safety signal with a recognizable pulse pattern that traverses the single-wire safety circuit to the safety relay via the intermediate safety devices. The safety relay maintains safety mode as long as the pulse pattern is received and recognized. In addition to conveying the safety signal, the architecture allows bi-directional communication of initialization, configuration, and diagnostic messages over the single-wire safety channel.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: October 24, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Suresh R. Nair, Wayne R. Foster, Christopher Burke, Alex Harris, Rudolf Laurenz Papenbreer, Dirk Lorenz, Norbert Machuletz, Oliver Heckel
  • Patent number: 9799038
    Abstract: A method for tracking procedures performed on personal protection equipment (PPE) and actions of individuals includes the following steps. An article of PPE configured with a smart tag is provided to an individual prior to performance of a task. After the individual performs the task, the article of PPE is processed. Information is retrieved from the smart tag during at least one of: before, during and after processing the article of PPE. After the performance of the task, the individual's data is read and the individual enters into a designated area.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: October 24, 2017
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Luca D. Farioli Brioschi, Luis V. Ramirez Chaidez, Lawrence J. Ptasienski, Mark T. Anderson, Michael E. Hamerly
  • Patent number: 9772675
    Abstract: A power supply system for an electronic device includes a main device and at least one slave device coupled to the main device. The main device includes a power module and a detection module. Each slave device includes a slave control module, a determination module, and a switch module. The power module supplies power for the slave devices via the switch module. The detection module detects a total consumption of power of the coupled slave devices and compares the total of consumed power to a power rating of a power source. Each determination module is configured to determine whether a posterior slave device is coupled to the local slave device. Each slave control module can deactivate the switch module of the local slave device when the total of power consumed exceeds the power rating and the local slave device disconnects from the posterior slave device.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: September 26, 2017
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Ching-Chung Lin
  • Patent number: 9775195
    Abstract: A combined heating system and occupant sensing system for a vehicle seat includes first and second electrodes connected in series and a controller configured to direct a heating current to the first and second electrodes. The controller is configured to isolate the first and second electrodes from the heating current and, at the same time, provide a sensing current to only one of the first and second electrodes.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: September 26, 2017
    Assignee: TK Holdings Inc.
    Inventor: Michael Tabaczynski
  • Patent number: 9748759
    Abstract: An advance warning lightning electromagnetic pulse (LEMP) storm detection device, system, and method for automatically protecting, disconnecting, and isolating electronic equipment in anticipation of a potential storm, thereby preventing damage to electronics susceptible to power surges caused by lightning strikes or earth ground fault events. The storm detection device can include a coaxial isolation switch, a radio receiver, a controller having a processor, wherein the controller further includes an isolation detection unit. In addition, the storm detection device can further include a drive motor, one or more input electrical contacts, and one or more output electrical contacts engaged with the input electrical contacts. Further, wherein in response to the radio receiver detecting one or more lightning strikes, the controller operates the drive motor to disengage the input electrical contacts and output electrical contacts from each other.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: August 29, 2017
    Inventors: Donald J. Bergeron, Gary Michael Bishop, Michael Andrew Oliver
  • Patent number: 9733661
    Abstract: A power management circuit includes a voltage sensing circuit and a supply voltage adjusting circuit. The voltage sensing circuit is arranged for sensing a plurality of voltages respectively of a plurality of nodes of a PCB to generate a sensing result. The supply voltage adjusting circuit is coupled to the voltage sensing circuit, and is arranged for determining a voltage level of a supply voltage supplied to a power plane of the PCB by referring to the sensing result.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: August 15, 2017
    Assignee: MEDIATEK INC.
    Inventors: Chia-Tao Hsu, Chee-Kong Ung, Li-Chun Yang, Yu-Sung Chen, Ming-Tse Dai
  • Patent number: 9720395
    Abstract: A method and system are provided. The method includes synchronously reconnecting a microgrid to a main grid after islanding of the microgrid. The synchronously reconnecting step includes calculating a phase angle difference between synchrophasor measurements collected from a common coupling on the main grid and synchrophasor measurements collected from a common coupling on the microgrid. The synchronously reconnecting step further includes calculating, by a controller, a frequency reference deviation based on the phase angle difference. The synchronously reconnecting step also includes adjusting a frequency of the diesel generator based on the frequency reference deviation.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: August 1, 2017
    Assignee: NEC Corporation
    Inventors: Di Shi, Ratnesh Sharma, Yusheng Luo
  • Patent number: 9667131
    Abstract: The present invention relates to a differential protection method for bridge circuit in current converter control system, including the steps of: 1). obtaining sample values of the three-phase current for the current converter control system at AC side thereof, and calculating the absolute value of each sampling value respectively; 2). calculating a value of current at the AC side of the current converter control system; and 3). determining whether to perform a relay protection for the current converter control system according to the value current at the AC side of the current converter control system. The method of the present invention provided, is fast, convenient, and with a small amount of calculation. The current converter control system determines whether to perform a relay protection in a short time. Also it reduces the possibility that the equipment burned because of cannot break the circuit in time.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: May 30, 2017
    Assignees: XJ GROUP CORPORATION, XUCHANG XJ SOFTWARE TECHNOLOGIES LTD, XJ ELECTRIC CO., LTD, XI'AN JIAOTONG UNIVERSITY, STATE GRID CORPORATION OF CHINA
    Inventors: Xing Liu, Ruizhi Jiang, Yuanhang Yang, Guobing Song, Guobin Li, Xu Zhu, Peiyao Liu
  • Patent number: 9509399
    Abstract: Disclosed herein are systems for detecting a location of a fault on an electric power transmission line using a state-of-polarization traveling wave in an optical ground wire Various embodiments may also detect a traveling wave on a conductor of the transmission system. The arrival times of the state-of-polarization traveling wave and the electrical traveling wave may be compared. Using the difference in times and the known propagation velocities of the traveling waves, a distance to the fault may be calculated. Arrival time of the state-of-polarization traveling wave may be calculated using electrical signals from photodetectors in an optical channel with polarizing filters at different orientations or reference frames.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: November 29, 2016
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Bogdan Z. Kasztenny, Douglas I. Taylor
  • Patent number: 9502882
    Abstract: A method of protecting a power distribution system from a fault on a feed conductor thereof, wherein an HFAC signal is provided to the feed conductor from a location downstream of the feed conductor in the power distribution system. The method includes, in a module located upstream of the feed conductor in the power distribution system, determining an HFAC signal magnitude in the module, the module including a circuit interrupter, and controlling operation of the circuit interrupter based on the determined magnitude.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: November 22, 2016
    Assignee: EATON CORPORATION
    Inventors: Qiang Fu, Yi Yang, Charles John Luebke, Xin Zhou
  • Patent number: 9450401
    Abstract: A method for controlling a thermally sensitive over-current protector is described. A battery current is monitored. It is then determined whether or not the monitored current has exceeded a predetermined threshold during the entirety of a predetermined time interval. If yes, then a current source is signaled to raise its current, so as to increase the heat being generated by a heating element that is being driven by the current source thereby tripping the thermally sensitive over-current protector. Other embodiments are also described and claimed.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: September 20, 2016
    Assignee: Apple Inc.
    Inventor: Xingqun Li
  • Patent number: 9450400
    Abstract: A protection and control system includes a first merging unit which obtains an electric variable from a transformer, and digitally converts the obtained electric variable to output the converted electric variable as first electric variable information to a first network, a plurality of first protection and control devices, each of which obtains the first electric variable information from the first merging unit through the first network, judges whether or not a system fault occurs, and outputs main trip information to the first network when that the system fault occurs is judged, and a second protection and control device which obtains the first electric variable information from the first merging unit through the first network, judges whether or not the system fault occurs in the zone to be protected of the electric power system.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: September 20, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yu Ohtomo, Akira Ishibashi
  • Patent number: 9345082
    Abstract: A current regulating LED strobe drive circuit including an energy storage component, a current regulator electrically coupled to the energy storage component for sensing and regulating a current supplied by the energy storage element, a LED electrically coupled to the current regulator, a flash control element electrically coupled to the current regulator for generating a flash pulse signal that dictates a pulsed pattern with which current is allowed to flow from the current regulator to the LED, an output control having an operator interface for allowing an operator to select a desired light output level, wherein the output control is electrically coupled to the current regulator for varying the amount of current supplied to the LED, and an inrush control including a plurality of slow charge circuits, wherein each slow charge circuit is configured to provide a respective peak current for charging the energy storage component.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: May 17, 2016
    Assignee: TYCO FIRE & SECURITY GMBH
    Inventor: Kenneth E Savage, Jr.
  • Patent number: 9203398
    Abstract: A control device of a multi circuit load break switch according to the disclosure may include a first multiplexer selectively providing an output signal according to a remote close signal or remote open signal; a field closing switch selectively commanding a close operation; a field opening switch selectively commanding an open operation thereof; a second multiplexer selectively providing a field closing switch actuation signal or field opening switch actuation signal; a first exclusive-OR circuit unit outputting an open control signal; a second exclusive-OR circuit unit outputting a close control signal; an open command signal generation unit releasing an open command signal; a close command signal generation unit; a first photo coupler providing an open state signal to the open command signal generation unit; and a second photo coupler providing a close state signal to the close command signal generation unit.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: December 1, 2015
    Assignee: LSIS Co., Ltd.
    Inventor: Sung Sik Ham
  • Patent number: 9160171
    Abstract: Systems, methods, and apparatus for pre-processing of electrical power grid data for event-driven automatic generation control (AGC) are presented herein. An AGC application can determine AGC output data, for output to a unit controller that controls power generator(s) related to an electrical power grid, based on current values of a subset of electrical power grid data associated with the electrical power grid that has changed since a prior determination that the electrical power grid data has changed. A pre-process component can determine the subset of the electrical power grid data that has changed since the prior determination, and send the current values of the subset of the electrical power grid data to an area control error component. An event-driven component can determine information in response to an event trigger generated based on processing the current values of the subset of the electrical power grid data received from the pre-process component.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: October 13, 2015
    Assignee: ALSTOM TECHNOLOGY LTD.
    Inventors: Anthony Terrence Patterson, Bradley Thomas Nelson
  • Patent number: 9158684
    Abstract: A memory module that is couplable to a memory controller hub (MCH) of a host system includes a non-volatile memory subsystem, a data manager coupled to the non-volatile memory subsystem, a volatile memory subsystem coupled to the data manager and operable to exchange data with the non-volatile memory subsystem by way of the data manager, and a controller operable to receive read/write commands from the MCH and to direct transfer of data between any two or more of the MCH, the volatile memory subsystem, and the non-volatile memory subsystem based on the commands.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: October 13, 2015
    Assignee: NETLIST, INC.
    Inventors: Hyun Lee, Chi-She Chen, Jeffrey C. Solomon, Scott H. Milton, Jayesh Bhakta
  • Patent number: 9053020
    Abstract: A method for automatic protection coordination in a power system network comprises identifying radial source-to-load paths and fault protection devices in the source-to-load paths, for a portion of the power system network to be coordinated. Device settings data for fault protection devices are retrieved, including multiple preconfigured settings for some devices. Fault currents for each of multiple possible electrical faults in said portion of the power system network are predicted, and a selectivity check for each pair of fault protection devices that are adjacent to one another in an identified radial source-to-load path is performed, for each of one or more of the predicted fault currents, taking into account multiple preconfigured settings for remotely controllable fault protection devices.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: June 9, 2015
    Assignee: ABB Research Ltd.
    Inventors: Dmitry Ishchenko, Zhao Li, James D. Stoupis, Martin Bass, William L. Peterson, M. Gamini Wickramasekara
  • Publication number: 20150116875
    Abstract: The invention relates to a safety device for a high-voltage system, having a coupling device which switchably couples high-voltage components of the high-voltage system to external components, and which is designed to electrically separate the high-voltage components from the external components depending on actuation of a safety switch, having a discharge circuit which is designed to electrically discharge the high-voltage components depending on actuation of the safety switch, and having a monitoring device which is designed to monitor electric parameters of the discharge circuit or of the high-voltage components, and to release the lock of a housing for the high-voltage components if at least one of the electric parameters of the discharge circuit or of the high-voltage components falls below a predetermined threshold value.
    Type: Application
    Filed: February 14, 2013
    Publication date: April 30, 2015
    Inventors: Rodrigo Biurrun Sotelo, Juergen Binder, Ulrich Gottwick, Hans-Georg Horst
  • Patent number: 9019673
    Abstract: Systems, methods, and devices relating to fault detection and short circuit current management support in power transmission and distribution networks using multiple inverter based power generation facilities. A fault detection process uses the waveshape (or the rate of change of the current) of the distributed generator output short circuit current to determine if a trip signal is required to disconnect the inverter based power generation facility from the transmission and distribution network. The process operates on DGs such as photovoltaic (PV) based solar farm. The present invention applies to the entire 24-hour period operation of inverter based DGs (e.g., solar farms, wind farms, fuel cell based DGs, etc.).
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 28, 2015
    Inventors: Rajiv Kumar Varma, Shah Arifur Rahman
  • Patent number: 9007733
    Abstract: An improved method of fault detection in a high-voltage direct current (HVDC) power transmission line is provided. The fault detection is based on fault-induced travelling waves. The method comprises estimating an amplitude of fault-induced travelling waves at the fault location, and calculating a fault resistance (Rf) based on the estimated amplitude, an estimated pre-fault voltage at the fault location, and a surge impedance of the transmission line. The estimated fault amplitude and the estimated pre-fault voltage are calculated from voltage measurements performed at both ends of the transmission line. Further, a fault detection device is provided.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: April 14, 2015
    Assignee: ABB Technology AG
    Inventors: Jianping Wang, Jiuping Pan, Reynaldo Nuqui
  • Patent number: 9007734
    Abstract: A method for monitoring a bus bar with regard to short circuits that may occur. The bus bar has a feeder and at least two outgoers. A outgoer safety device is provided at each outgoer and a feeder safety device is provided at the feeder. In the case of a short circuit in one of the outgoers, the outgoer safety device associated with the outgoer outputs a blocking signal to the feeder safety device, delaying or preventing actuation of a power switch disposed at the feeder. In order to provide a method wherein comparably little installation effort is required, the outgoer safety devices send repeating communication telegrams to the feeder safety device by way of a data transfer bus, and the feeder safety device checks the receipt of the communication telegrams by way of a checking logic, and optionally prevents the execution of a blocking signal. A feeder safety device is correspondingly configured.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: April 14, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Oliver Hartmann
  • Patent number: 9007731
    Abstract: Disclosed herein are systems and methods for leveraging the inherent redundancy of electrical measurement inputs available to microprocessor-based intelligent electronic devices (IEDs). Specifically, an IED may receive a plurality of electrical measurements associated with an electric power delivery system, such as measurements associated with a generator. A first protection module may be configured to detect a first type of electrical disturbance using a first subset of the plurality of electrical measurements. A second protection module may be configured to detect a second type of electrical disturbance using a second subset of the plurality of electrical measurements. A first redundant protection module may be configured to verify the detection of the first type of electrical disturbance using at least a portion of the second subset of the plurality of electrical measurements.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: April 14, 2015
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventors: Dale S. Finney, Bogdan Z. Kasztenny, Normann Fischer
  • Patent number: 8982519
    Abstract: A current differential relay comprises: an interface section; a quantization section; a communication section; and a difference calculation section. The quantization section quantizes current received by the interface section and converts it to first current data. The communication section, in the case where this relay is a representative current differential relay of a first group, transmits second current data from another current differential relay belonging to the first group and the first current data jointly to a representative current differential relay belonging to the second group, receives third current data from the representative current differential relay, and transmits the third current data to the other current differential relays. A difference calculation section executes a current difference calculation based on the first to third current data.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: March 17, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichi Okuno, Masamichi Saga
  • Patent number: 8981954
    Abstract: Methods, devices, and systems for activation of a protection system and dynamic labeling are described. An example system for use with a plurality of circuit protection devices coupled to a switchgear unit includes a first sensor for detecting a body located within a first zone associated with a threshold distance from the switchgear unit, and a controller coupled to the first sensor. The controller is configured to selectively enable the plurality of circuit protection devices. The controller is configured to enable a first circuit protection device of the plurality of circuit protection devices in response to detecting, via the first sensor, a body within the first zone.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: March 17, 2015
    Assignee: General Electric Company
    Inventors: Brent Charles Kumfer, Robert Joseph Caggiano, Michael Anthony Leporace
  • Patent number: 8964344
    Abstract: In an electrical distribution system an arc management system has a transducer mounted in proximity to the circuit breaker for detecting and signaling a secondary effect of an overcurrent event within the case of the circuit breaker. The transducer provides an additional input to an arc fault detection system using other detectors and thus helps to control nuisance activations of the arc extinguishing mechanism. The system is particularly suited for circuit breakers without electronics, or the like, allowing for retrofit of existing systems. The system may monitor and act upon the excessive duration of the secondary effects.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: February 24, 2015
    Assignee: Schneider Electric USA, Inc.
    Inventors: Richard Gerhard Spangenberg, Julius Michael Liptak
  • Patent number: 8958188
    Abstract: There is provided an electricity storage system which comprises an electricity storage device, a charge and discharge switch device which is placed connected to the electricity storage device, a control block which is a charge and discharge control device which controls charging from a power supply and discharging from the electricity storage device to an external load, and an electricity storage device breaker with transmission and reception functions which is provided between the electricity storage device and the charge and discharge switch device, disconnects connection with the electricity storage device according to detection of abnormality of the electricity storage device or according to an instruction of the control block, and notifies the execution of the disconnection to the control block. The control block comprises a hardware disconnection instruction unit in addition to a software disconnection instruction unit.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: February 17, 2015
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Takeshi Nakashima, Yohei Yamada, Takehito Ike