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1.发明申请公开(公告)号：US20190187202A1
公开(公告)日：2019-06-20
申请号：US16284504
申请日：2019-02-25
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 system for accurately determining a location of a fault in an electric power delivery system using traveling waves by compensating for dispersion of the traveling waves. The dispersion may be calculated based on a preliminary fault location determination, and the arrival times of traveling wave peaks may then be corrected using the calculated dispersion. A compensation to the traveling wave propagation speed may be made using a proportionality factor to correct for traveling wave dispersion. Dispersion correction may be a function of fault type or physical power line conditions.
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2.发明申请公开(公告)号：US20190013667A1
公开(公告)日：2019-01-10
申请号：US16065693
申请日：2016-07-18
Applicant: CHINA ELECTRIC POWER RESEARCH INSTITUTE COMPANY LIMITED , STATE GRID CORPORATION OF CHINA , STATE GRID CENTRAL CHINA GRID COMPANY LTD.
Inventor： Huanzhang Liu , Zexin Zhou , Dingxiang Du , Yarong Guo , Xiao Li , Xuming Liang , Delin Wang , Xingguo Wang
CPC classification number: H02H7/265 , H02H1/0007 , H02H1/0092
Abstract: A method of free wave energy protection for a half-wavelength line based on a one-sided current includes: performing sampling and calculation on a current at protection measuring points to obtain variations in current sampling values; and activating a protective element to determine an occurrence time of a fault in a half-wavelength line. A free wave energy protection section includes a quick-action section, a basic section and a sensitive section, wherein the quick-action section, the basic section and the sensitive section serve as action criteria for performing protection with respect to the free wave energy of the half-wavelength line.
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公开(公告)号：US20180069391A1
公开(公告)日：2018-03-08
申请号：US15558894
申请日：2015-03-30
Applicant: ABB Schweiz AG
Inventor： Kai LIU , Jianping WANG , YouYi LI
Abstract: A mechanism for travelling wave protection of a transmission line and a method for acquiring information of both voltage and current polarities from two ends of a transmission line. The method includes comparing the voltage and current polarities of both ends of the transmission line to each other. The method also includes making a trip decision based on the comparison.
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4.发明申请公开(公告)号：US20170146613A1
公开(公告)日：2017-05-25
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
CPC classification number: H02H7/20 , G01R31/08 , G01R31/085 , G01R31/088 , G01R31/2836 , G01R31/40 , G05B9/02 , H02H3/042 , H02H7/265
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：US20170131343A1
公开(公告)日：2017-05-11
申请号：US15413004
申请日：2017-01-23
Applicant: Schweitzer Engineering Laboratories, Inc.
CPC classification number: G01R31/088 , G01R13/02 , G01R31/08 , G01R31/085 , G01R31/11 , H02H1/003 , H02H1/0092 , H02H7/265 , Y04S10/522
Abstract: The present disclosure relates to calculating a fault location in an electric power transmission system based on traveling waves. In one embodiment, a system consistent with the present disclosure may be configured to detect a fault in an electric power transmission system. The system may include a traveling wave detection subsystem configured to detect and measure traveling waves on a transmission line and a fault location estimation subsystem. The fault location estimation subsystem may receive from the traveling wave detection subsystem a first plurality of traveling waves on the transmission line generated during a reference event. The fault location estimation subsystem may receive from the traveling wave detection subsystem a second plurality of traveling waves generated during an unplanned event. An unmatched traveling wave in the second plurality of waves may be detected and a location of the unplanned event based on the unmatched traveling wave.
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Patent Agency Ranking
公开(公告)号：US09627881B2
公开(公告)日：2017-04-18
申请号：US15272116
申请日：2016-09-21
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Veselin Skendzic , Tony J. Lee , David E. Whitehead
CPC classification number: H02H7/20 , G01R31/08 , G01R31/085 , G01R31/088 , G01R31/2836 , G01R31/40 , G05B9/02 , H02H3/042 , H02H7/265
Abstract: The present disclosure pertains to systems and methods for detecting faults 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. The system may also include a traveling wave differential subsystem configured to determine an operating quantity based on the plurality of representations of electrical conditions. The traveling wave differential subsystem may also determine a restraint quantity based on the plurality of representations of electrical conditions. The traveling wave differential subsystem may detect a traveling wave generated by the fault based on the plurality of representations. A fault detector subsystem may be configured to declare a fault based on a comparison of the operating quantity and the restraint quantity. A protective action subsystem may implement a protective action based on the declaration of the fault.
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7.发明授权Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements 有权使用欠联接，定向和行波元件的电力输送系统中的故障检测公开(公告)号：US09594112B2
公开(公告)日：2017-03-14
申请号：US14856353
申请日：2015-09-16
Applicant: Schweitzer Engineering Laboratories, Inc.
Inventor： Edmund O. Schweitzer, III , Mangapathirao Venkata Mynam , Armando Guzman-Casillas , Bogdan Z. Kasztenny , Veselin Skendzic , David E. Whitehead
CPC classification number: H02H7/20 , G01R31/08 , G01R31/085 , G01R31/088 , G01R31/2836 , G01R31/40 , G05B9/02 , H02H3/042 , H02H7/265
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.
Abstract translation: 本公开涉及用于检测电力输送系统中的故障的系统和方法。 在一个实施例中，系统可以包括被配置为接收电气条件的多个表示的数据采集子系统。 系统还可以包括被配置为基于多个表示来计算增量电流量和增量电压量的增量数量子系统。 故障检测子系统可以被配置为基于增量电流量和增量电压量来确定故障类型，选择适用的回路数量，并根据适用的回路量，增量电压量和 增量电流量。 保护作用子系统可以基于故障的声明来实施保护动作。
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公开(公告)号：US20060012374A1
公开(公告)日：2006-01-19
申请号：US10891449
申请日：2004-07-15
Applicant: Ljubomir Kojovic , Jules Esztergalyos
Inventor： Ljubomir Kojovic , Jules Esztergalyos
IPC: G01R31/08
CPC classification number: G01R31/088 , G01R31/085 , H02H7/265
Abstract: An apparatus includes at least one Rogowski coil and a processor. The at least one Rogowski coil is positioned within an electrical power distribution network to detect a first traveling wave current caused by a fault on an electrical power transmission line of the network, generate a first signal indicative of detection of the first traveling wave, detect a second traveling wave current caused by the fault on the transmission line, and generate a second signal indicative of detection of the second traveling wave. The processor is adapted to receive the first signal and the second signal and to determine, based on the first signal and the second signal, where on the transmission line the fault occurred.
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9.发明授权
公开(公告)号：US4731689A
公开(公告)日：1988-03-15
申请号：US30566
申请日：1987-03-27
Applicant: Gunnar Nimmersjo , Murari M. Saha
Inventor： Gunnar Nimmersjo , Murari M. Saha
Abstract: A method and a device for directional detection of a fault on a power transmission line extending between two stations (P, Q). In one of the stations (P) there is a travelling wave model which, by means of currents and voltages measured in the station, calculates the voltage distirbution along the line. The direction to a fault is determined by monitoring changes in calculated voltages in the two stations. If a fault occurs between the stations, the voltage change occurring in a station (Q) between the voltage existing prior to a fault and after a fault can be estimated as .vertline..DELTA.Uq.vertline., and the corresponding voltage change occurring in the other station (P) can be estimated as .vertline..DELTA.Up.vertline., whereby according to the invention the difference .vertline..DELTA.Uq.vertline.-.vertline..DELTA.Up.vertline.>0 signifies a fault on the line side of the station (P), i.e. a fault lying ahead of the measuring point. A fault lying behind station P is evidenced when .vertline..DELTA.Uq.vertline.-.vertline..DELTA.Up.vertline.
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10.发明授权
公开(公告)号：US4599556A
公开(公告)日：1986-07-08
申请号：US457367
申请日：1983-01-12
Applicant: Otto Lanz
Inventor： Otto Lanz
CPC classification number: G01R31/086 , H02H7/265 , Y04S10/522
Abstract: In an electrical power distribution system, line disturbances produce voltage and current travelling waves, or step-change signals, that are phase-shifted 90.degree. relative to each other. A simulation signal is derived from the current step-change signal and is in phase with the voltage step-change signal. The two in-phase signals are combined and compared with established limit values to determine when a fault occurs.
Abstract translation: 在配电系统中，线路干扰产生相对于彼此相移90度的电压和电流行波或阶跃变化信号。 仿真信号来自当前的步进变换信号，与电压阶跃变化信号同相。 将两个同相信号组合并与已建立的极限值进行比较，以确定何时发生故障。
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