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公开(公告)号：US11050234B2
公开(公告)日：2021-06-29
申请号：US16831128
申请日：2020-03-26
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , David E. Whitehead , Krishnanjan Gubba Ravikumar , Austin Edward Wade
Abstract: Systems and methods for facilitating selected communications among primary protection relays using a supervisory system with a configurable input/output (IO) map. Primary protection relays may obtain signals from equipment associated with an electric power delivery system and provide primary protection without need for communication. The primary protection relays may communicate a unique identifier as well as signal values, states, and commands to the supervisory system. The supervisory system may route specifically identified communications among primary protection relays in accordance with a configurable IO map by transmitting selected portions of the communications on a port associated with the receiving primary protection relay. The primary protection relays may perform secondary protection and other operations using the communicated information.
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公开(公告)号：US20210014196A1
公开(公告)日：2021-01-14
申请号：US16832816
申请日：2020-03-27
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Krishnanjan Gubba Ravikumar , Austin Edward Wade , Tony J. Lee , David J. Casebolt , David E. Whitehead
Abstract: Systems and methods may maintain protection of electric power delivery systems in the event of an attack on protection and/or control features of the power system. Primary protective functions may be physically isolated from other functions in primary protection relays. Integrators may facilitate non-primary protection functions and disconnect all communication with primary protection relays in the event of an attack. Primary protection relays maintain protection functions even during the attack or unavailability of the integrators.
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公开(公告)号：US10742022B2
公开(公告)日：2020-08-11
申请号：US15422965
申请日：2017-02-02
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Veselin Skendzic , David E. Whitehead
Abstract: The present disclosure pertains to systems and methods for detecting faults in an electric power delivery system. In one embodiment, system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions. The system may also include an incremental quantities subsystem configured to calculate an incremental current quantity and an incremental voltage quantity based on the plurality of representations. A fault detection subsystem may be configured to determine a fault type based on the incremental current quantity and the incremental voltage quantity, to select an applicable loop quantity, and to declare a fault based on the applicable loop quantity, the incremental voltage quantity, and the incremental current quantity. A protective action subsystem may implement a protective action based on the declaration of the fault.
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公开(公告)号：US20200182956A1
公开(公告)日：2020-06-11
申请号：US16792814
申请日：2020-02-17
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： David E. Whitehead , Tony J. Lee , Zachary King Sheffield , Tracey G. Windley
IPC: G01R35/00 , G01R31/08 , G01R31/327 , G01R31/11
Abstract: A testing apparatus for imposing a traveling wave signal on an electric system signal for testing a fault detector is disclosed herein. The fault detector may be configured to simulate a fault at a particular location by controlling the timing of the traveling wave signal. The testing apparatus may be configured to impose multiple traveling wave signals to test the accuracy of the fault location determined by the fault detector. The testing apparatus may be configured to determine the calculation accuracy of the fault detector. The testing apparatus may impose a traveling wave signal on a signal simulating an electrical signal on an electric power delivery system. The testing apparatus may be used to test capabilities of a fault detector of detecting a fault using traveling waves or incremental quantities.
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公开(公告)号：US10564247B2
公开(公告)日：2020-02-18
申请号：US15926818
申请日：2018-03-20
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Armando Guzman-Casillas , Mangapathirao Venkata Mynam , Taylor Joseph Blanc , David E. Whitehead , Tony J. Lee , Zachary King Sheffield , Tracey G. Windley
IPC: G01R35/00 , G01R31/28 , G01R31/327 , G01R31/11 , G01R31/08
Abstract: A testing system for imposing a traveling wave signal on an electric power system signal for testing a fault detector is disclosed herein. The testing system may be configured to simulate a fault at a simulated location by controlling the timing of the traveling wave signal. The testing system may be configured to impose multiple traveling wave signals to test the accuracy of the fault location determined by the fault detector. The testing system may be configured with multiple testing apparatuses using time coordination and referenced to an intended fault instant. The testing system may be configured to supply traveling waves of different polarities to test for different fault type detection.
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Patent Agency Ranking
公开(公告)号：US10236675B2
公开(公告)日：2019-03-19
申请号：US15644355
申请日：2017-07-07
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Bogdan Z. Kasztenny , David E. Whitehead
Abstract: An electric power delivery system may be protected upon occurrence of a fault condition by the systems and methods disclosed herein by detecting the fault condition and signaling a protective action before the overcurrent condition reaches the protective equipment. The protective action may be an opening of a circuit breaker or engagement of a fault current limiter. The overcurrent condition may be a non-steady-state condition. The fault may be detected using traveling wave or incremental quantity techniques.
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公开(公告)号：US20180292448A1
公开(公告)日：2018-10-11
申请号：US15994827
申请日：2018-05-31
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , David E. Whitehead , Bogdan Z. Kasztenny , Armando Guzman-Casillas , Veselin Skendzic
CPC classification number: G01R31/11 , G01R31/085 , H02H1/0007 , H02H1/0092 , H02H3/083 , H02H7/263 , H02H7/265
Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, a time-domain traveling wave directional subsystem is configured to receive a plurality of current traveling wave and a plurality of voltage traveling wave time-domain representations based on electrical conditions in the electric power delivery system. The plurality of current and voltage traveling wave time-domain representations may be compared to respective minimum thresholds. An integral may be generated based on a product of the plurality of current and voltage traveling wave time-domain representations when the current and voltage traveling wave time-domain representations exceed the minimum thresholds. A sign of the integral may reflect whether the fault is in the forward or reverse direction. A fault detector subsystem configured to declare the fault when the sign reflects that the fault is in the forward direction and the integral exceeds a security margin.
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公开(公告)号：US10090664B2
公开(公告)日：2018-10-02
申请号：US15269959
申请日：2016-09-19
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , David E. Whitehead , Bogdan Z. Kasztenny , Armando Guzman-Casillas , Veselin Skendzic
Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem is configured to determine a forward torque, an operating torque, and a reverse torque based on the plurality of time-domain representations of electrical conditions. Each of the forward torque, the operating torque, and the reverse torque may be integrated over an interval. A fault detection subsystem may determine an occurrence of the fault based on a comparison of the operating torque to the forward torque and the reverse torque. Further, a direction of the fault may be determined based on the comparison of the forward torque, the operating torque, and the reverse torque. A fault may be declared based on the comparison and the direction. A protective action subsystem may implement a protective action based on the declaration of the fault.
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公开(公告)号：US20180278048A1
公开(公告)日：2018-09-27
申请号：US15994817
申请日：2018-05-31
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , David E. Whitehead , Bogdan Z. Kasztenny , Armando Guzman-Casillas , Veselin Skendzic
CPC classification number: G01R31/11 , G01R31/085 , H02H1/0007 , H02H1/0092 , H02H3/083 , H02H7/263 , H02H7/265
Abstract: The present disclosure relates to detection of faults in an electric power system. In one embodiment, an incremental quantities subsystem may be configured to calculate a plurality of values of an operating quantity based on the plurality of time-domain representations of electrical conditions. The incremental quantities subsystem may also calculate a plurality of values of a restraining quantity based on the plurality of time-domain representations of electrical conditions. An interval during which the calculated operating quantity exceeds the calculated restraining quantity may be determined. A fault detector subsystem may be configured to declare a fault based on the calculated operating quantity exceeding the calculated restraining quantity by a security margin. A protective action subsystem configured to implement a protective action based on the declaration of the fault.
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公开(公告)号：US20170110875A1
公开(公告)日：2017-04-20
申请号：US15294580
申请日：2016-10-14
Applicant: Schweitzer Engineering Laboratories, Inc.
CPC classification number: H02H3/50 , G01R31/021 , G01R31/085 , G01R31/11 , G01R31/40 , H02H1/0007 , H02H7/22 , H02H7/263 , H02H7/265
Abstract: The present disclosure pertains to systems and methods for obtaining and processing high-frequency electric power system measurements for control and monitoring of an electric power system. High-frequency measurements may be used to detect traveling waves and/or to detect faults in the electric power system. In various embodiments, a processing device may receive high-frequency electric power system measurements from each of a local location and a remote location and may process the high-frequency electric power system measurements to identify and locate a fault. The occurrence of and location of a fault and may be used to implement protective actions to remediate identified faults.
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