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公开(公告)号：US11271389B2
公开(公告)日：2022-03-08
申请号：US16946475
申请日：2020-06-24
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Bogdan Z. Kasztenny , Mangapathirao Venkata Mynam
Abstract: Distance protection for electric power systems disclosed herein uses an operating signal and a sequence polarizing signal made up of a supervised sequence current and a supervised sequence voltage. The polarizing signal may be determined based on the fault type and may be weighted toward sequence currents or sequence voltages depending on the power system conditions. For phase-to-ground faults, the sequence currents may include negative-sequence and zero-sequence currents. For phase-to-phase faults, the sequence currents may include negative-sequence currents. The current portion of the sequence polarizing signal may be weighted based on detection of insufficient negative-sequence current magnitude, standing unbalance, current transformer saturation, open pole, three-phase fault, and the like. The distance elements described herein provides improved protection during real-world power system conditions and changes.
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2.发明授权公开(公告)号：US10585133B2
公开(公告)日：2020-03-10
申请号：US16358407
申请日：2019-03-19
Applicant: Schweitzer Engineering Laboratories, Inc.
Abstract: A single-ended traveling wave fault location estimation is calculated using this disclosure, and a confidence level is determined based on available independent fault location estimations. Hypothesis are calculated based on traveling wave times and values, wherein the values indicate a polarity that is the same as the first received traveling wave. Hypothesis are then compared against results of other fault location estimations, and confidence levels assigned accordingly. The fault location is then calculated and displayed based on the hypothesis and confidence levels.
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公开(公告)号：US10581237B2
公开(公告)日：2020-03-03
申请号：US15294580
申请日：2016-10-14
Applicant: Schweitzer Engineering Laboratories, Inc.
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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公开(公告)号：US10483747B2
公开(公告)日：2019-11-19
申请号：US15291295
申请日：2016-10-12
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Mangapathirao Venkata Mynam
Abstract: The present disclosure relates to a fault in an electric power delivery system. In one embodiment, a system may include a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power delivery system. A traveling wave detector may be configured to detect a traveling wave event based on the plurality of representations of electrical conditions. A traveling wave directional subsystem may be configured to calculate an energy value of the traveling wave event during an accumulation period based on the detection of the traveling wave by the traveling wave disturbance detector. A maximum and a minimum energy value may be determined during the accumulation period. A fault direction may be determined based on the maximum energy value and the minimum energy value. A fault detector subsystem configured to declare a fault based on the determined fault direction.
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公开(公告)号：US10310004B2
公开(公告)日：2019-06-04
申请号：US15269904
申请日：2016-09-16
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, a time-domain traveling wave differential subsystem is configured to determine at a first terminal a first index between an arrival maximum of a traveling wave generated by a fault at the first terminal and an exit maximum of the traveling wave. The traveling wave subsystem also determines a second index between an arrival maximum of the traveling wave at the second terminal and an exit maximum of the traveling wave. An operating quantity and a restraint quantity may be determined based on a magnitude of the representations of electrical conditions in the first index and the second index. A fault may be declared based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may be configured to implement a protective action based on the declaration of the fault.
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Patent Agency Ranking
公开(公告)号：US20180212421A1
公开(公告)日：2018-07-26
申请号：US15269904
申请日：2016-09-16
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 differential subsystem is configured to determine at a first terminal a first index between an arrival maximum of a traveling wave generated by a fault at the first terminal and an exit maximum of the traveling wave. The traveling wave subsystem also determines a second index between an arrival maximum of the traveling wave at the second terminal and an exit maximum of the traveling wave. An operating quantity and a restraint quantity may be determined based on a magnitude of the representations of electrical conditions in the first index and the second index. A fault may be declared based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may be configured to implement a protective action based on the declaration of the fault.
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公开(公告)号：US20170082675A1
公开(公告)日：2017-03-23
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
CPC classification number: H02H3/083 , G01R31/085 , H02H1/0007 , H02H1/0092 , H02H7/265 , H04B3/46
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：US09160158B2
公开(公告)日：2015-10-13
申请号：US14052449
申请日：2013-10-11
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Daqing Hou
Abstract: Systems and methods are presented for detecting high-impedance faults (HIFs) in an electric power delivery system using a plurality of coordinated high-impedance fault detection systems. In certain embodiments, a method for HIFs may include receiving first and second current representations associated with first and second locations of the electric power delivery system respectively. Based on at least one of the first and second current representations, the occurrence of an HIF may be determined. A relative location of the HIF may be determined based on a relative amount of interharmonic content associated with an HIF included in the first and second current representations, and a protective action may be taken based on the determined relative location.
Abstract translation: 提出了用于检测使用多个协调的高阻抗故障检测系统的电力输送系统中的高阻抗故障（HIF）的系统和方法。 在某些实施例中，用于HIF的方法可以包括分别接收与电力输送系统的第一和第二位置相关联的第一和第二电流表示。 基于第一和第二电流表示中的至少一个，可以确定HIF的发生。 可以基于与包括在第一和第二当前表示中的HIF相关联的间谐波内容的相对量来确定HIF的相对位置，并且可以基于所确定的相对位置来采取保护动作。
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9.发明申请FAULT LOCATION USING TRAVELING WAVES BY CALCULATING TRAVELING WAVE ARRIVAL TIME 审中-公开使用行驶波浪计算行驶时间的故障位置公开(公告)号：US20150081235A1
公开(公告)日：2015-03-19
申请号：US14486921
申请日：2014-09-15
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Armando Guzman-Casillas , Tony J. Lee , Veselin Skendzic , Bogdan Z. Kasztenny , David E. Whitehead
CPC classification number: G01R31/088 , G01R19/2513 , G01R31/085 , G01R31/11 , H02H7/265
Abstract: A location of a fault in an electric power delivery system may be detected using traveling waves instigated by the fault. The time of arrival of the traveling wave may be calculated using the peak of the traveling wave. To determine the time of arrival of the peak of the traveling wave, estimates may be made of the time of arrival, and a parabola may be fit to filtered measurements before and after the estimated peak. The maximum of the parabola may be the time of arrival of the traveling wave. Dispersion of the traveling wave may also be corrected using an initial location of the fault and a known rate of dispersion of the electric power delivery system. Time stamps may be corrected using the calculated dispersion of the traveling wave.
Abstract translation: 可以使用由故障引起的行波来检测电力输送系统中的故障位置。 可以使用行波的峰值计算行波的到达时间。 为了确定行波的峰值的到达时间，可以估计到达时间，并且抛物线可以适合估计峰值之前和之后的滤波测量值。 抛物线的最大值可以是旅行波的到达时间。 也可以使用故障的初始位置和电力输送系统的已知的分散速率来校正行波的分散。 可以使用所计算的行波的色散校正时间标记。
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公开(公告)号：US11280834B2
公开(公告)日：2022-03-22
申请号：US16549853
申请日：2019-08-23
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Armando Guzman-Casillas , Veselin Skendzic , Mangapathirao Venkata Mynam , Bogdan Z. Kasztenny
IPC: G01R31/58 , G01R31/327 , G01R31/08 , G01R21/133
Abstract: The present disclosure relates to determining locations of low-energy events on power lines. For example, an IED may receiving an input signal indicating a local electrical condition of a power line. The IED may detect traveling waves on the power line based on the local electrical condition. The IED may detect traveling waves on the power line based on the local and remote electrical conditions. The IED may determine that the traveling waves are associated with a low-energy event. The IED may determine the location of the low-energy event on the power line based at least in part on the traveling waves.
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