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公开(公告)号：US11320475B2
公开(公告)日：2022-05-03
申请号：US16792814
申请日：2020-02-17
摘要： 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：US11165238B2
公开(公告)日：2021-11-02
申请号：US16788408
申请日：2020-02-12
发明人： Edmund O. Schweitzer, III , David E. Whitehead , David J. Casebolt , Krishnanjan Gubba Ravikumar , Austin Edward Wade , Lisa Gayle Nelms , Brian R. Clark
摘要： The present disclosure pertains to systems and methods for monitoring electrical arc events in an electric power system. In one embodiment, a system may comprise an arc flash detection (AFD) unit to detect electromagnetic radiation generated by an electrical arc event, a primary protection relay to generate measurements of an electric current, and an integrator. In various embodiments, the integrator may comprise a communication port to receive the detection of the electrical arc event and the measurements of the electric current. The integrator may also comprise a processing subsystem to validate the detection of the electrical arc and generate protective actions to interrupt the flow of the current to the electrical arc event.
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公开(公告)号：US11038336B1
公开(公告)日：2021-06-15
申请号：US17170073
申请日：2021-02-08
发明人： Edmund O. Schweitzer, III , David E. Whitehead , David J. Casebolt , Krishnanjan Gubba Ravikumar , Sean D. Robertson , Austin Edward Wade , Bruce A. Hall
摘要： Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.
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公开(公告)号：US20210167590A1
公开(公告)日：2021-06-03
申请号：US17170073
申请日：2021-02-08
发明人： Edmund O. Schweitzer, III , David E. Whitehead , David J. Casebolt , Krishnanjan Gubba Ravikumar , Sean D. Robertson , Austin Edward Wade , Bruce A. Hall
摘要： Disclosed herein are systems for maintaining protection of electric power delivery systems in the event of a control power failure or other anomaly. A reliable power module conditions electric power from multiple independent sources and provides electrical operational power to electric power delivery system protective loads. The reliable power module includes an energy storage device for providing operational power even upon loss of all control power sources. The energy storage may be sufficient to ride through expected losses such as a time to start up backup generation. The energy storage may be sufficient to power a trip coil. Thus, electric power system protection is maintained even upon loss of control power. A discharge circuit is provided to allow an operator to de-energize an energy storage device.
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公开(公告)号：US20210111586A1
公开(公告)日：2021-04-15
申请号：US17034128
申请日：2020-09-28
发明人： Edmund O. Schweitzer, III , Daqing Hou , David E. Whitehead , Tony J. Lee , Krishnanjan Gubba Ravikumar
IPC分类号： H02J13/00
摘要： Systems and methods including improving availability of protection of an electric power delivery system even upon unavailability of power system signals. Such protection relays may provide protection using signals from the power system and provide the signals to an integrator or another device. Upon unavailability of power system signals to a protection relay, the integrator sends substitute power system signals may be provided to the protection relay. The protection relay may continue to provide protection using the substitute power system signals.
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公开(公告)号：US20210111555A1
公开(公告)日：2021-04-15
申请号：US17034142
申请日：2020-09-28
摘要： Primary protection relays and an integrator disclosed for providing primary protection and secondary applications for an electric power delivery system. The primary protection relays obtain signals from, and provide primary protection operations for the power system, and may operate independently from the integrator. An integrator receives signals and status communications from the primary protection relays to perform secondary applications for the electric power delivery system. The secondary applications may include backup protection, system protection, interconnected protection, and automation functions.
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公开(公告)号：US20210057901A1
公开(公告)日：2021-02-25
申请号：US16831128
申请日：2020-03-26
发明人： Edmund O. Schweitzer, III , David E. Whitehead , Krishnanjan Gubba Ravikumar , Austin Edward Wade
摘要： 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：US10605887B2
公开(公告)日：2020-03-31
申请号：US15491837
申请日：2017-04-19
摘要： Continuous monitoring of an electric power system during testing of a primary electric power meter is described herein. Electric power system signals or test signals may be selectively supplied to the primary electric power meter. Electric power system signals may be supplied to a secondary meter while a test signal is applied to the primary electric power meter. The secondary meter may record and/or transmit monitoring functions and communicate the results of the monitoring functions to the primary electric power meter while the test signals are supplied to the primary electric power meter.
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9.发明授权公开(公告)号：US10375108B2
公开(公告)日：2019-08-06
申请号：US15394097
申请日：2016-12-29
摘要： This disclosure relates to detecting manipulation or spoofing of a time based on a latency of a communication system. In one embodiment, a system includes a time input to receive a time signal. The system includes a first interface to receive a first representation of a first condition at a first location at a first time and a second interface to receive a second representation of a second condition at a second location and at the first time. A latency determination subsystem may determine a latency based on a comparison of the time of arrival of the second measurement and the first time. A threshold subsystem may generate an indication of whether the latency satisfies a threshold. An anomalous condition subsystem may identify an anomalous condition based on the indication, and a remedial action may be implemented based on the anomalous condition.
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公开(公告)号：US10161986B2
公开(公告)日：2018-12-25
申请号：US15783965
申请日：2017-10-13
摘要： Disclosed herein are systems for monitoring and protecting an electric power system using a plurality of conductor-mounted detectors (CMDs). In one embodiment, a plurality of CMDs are coupled to an electrical conductor. Each CMD may harvest power from the electrical conductor and may monitor electrical current in the conductor. When the electrical current in the conductor exceeds a fault current threshold a fault signal may be transmitted. A receiver in communication with each of the plurality of CMDs may receive the fault signal from at least one of the plurality of CMDs. A protective action may be generated and implemented to clear the fault. A portion of the electric power system affected by the fault may be determined based on identification of each of the plurality of CMDs to transmit the fault signal.
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