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1.发明授权Negative and zero sequence directional overcurrent unit for AC power transmission line protection 失效负和零序方向过流单元，用于交流输电线路保护
公开(公告)号：US4825327A
公开(公告)日：1989-04-25
申请号：US120078
申请日：1987-11-12
摘要： A protective relay for detecting faults within a predetermined protected zone of a three phase alternating current electrical power distribution system, of the type which utilizes at least one restraint signal in conjunction with at least one operate signal to generate a net operate signal, generates an operate quantity which is related to a zero sequence component of current flowing in the power distribution system and a second operate quantity which is related to a negative sequence component of the current flowing in the power distribution system. The operate quantities are summed to form an operate signal. An adaptive restraint, which is proportional to a negative sequence component and a zero sequence component of a phase voltage of the power distribution system, is generated and utilized to provide increased sensitivity to higher resistance ground faults. A portion of a positive sequence component of the current flowing in the power distribution signal is utilized as a restraint signal to prevent the unit from operating on negative sequence currents present during normal load conditions. Adaptive restraint enables the directional overcurrent unit to operate correctly should a second fault occur on the transmission line during the period that one pole is open.
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2.发明授权
公开(公告)号：US4821137A
公开(公告)日：1989-04-11
申请号：US120115
申请日：1987-11-12
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
摘要： A protective relay for detecting faults within a predetermined protected zone of a three phase alternating current electrical power distribution system generates a polarizing signal V.sub.POL which includes a signal V.sub.1 related to a positive sequence component of a phase voltage of the three phase power distribution system. A signal I.sub.1 Z.sub.R, which is a signal related to a positive sequence component of a phase current of the three phase power distribution system multiplied by a replica impedance of the protected zone of the three phase power distribution system, is also generated. The coincidence of the V.sub.POL and I.sub.1 Z.sub.R signals are compared and an operate signal is generated as a result of positive coincidence. A first restraint signal is generated as a result of negative coincidence. A second restraint signal related to V.sub.1 is also generated. A net operating signal is generated when the magnitude of the operate signal exceeds the sum of the magnitude of the first restraint signal and the second restraint signal.
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公开(公告)号：US4447845A
公开(公告)日：1984-05-08
申请号：US395951
申请日：1982-07-07
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
CPC分类号： H02H3/402
摘要： Disclosed is an improved reactance type protective relay that increases security against false tripping while still providing desired protection for a high voltage transmission line. The improved reactance relay employs a circuit arrangement having characteristic timers that optimize the performance of the reactance relay and also allows for desired coordination between the reactance relays that may be located along the high voltage transmission line.
摘要翻译： 公开了一种改进的电抗型保护继电器，其在为高压输电线路仍然提供期望的保护的同时提高了防止误跳闸的安全性。 改进的电抗继电器使用具有优化电抗继电器的性能的特性定时器的电路装置，并且还允许可能沿着高压输电线路定位的电抗继电器之间所需的协调。
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公开(公告)号：US4420788A
公开(公告)日：1983-12-13
申请号：US403273
申请日：1982-07-29
摘要： A phase relay utilizes improved polarizing and operating signals in order to provide discrimination between internal faults within a protected zone of an AC power transmission line and external faults than can appear as internal faults due to transients induced by capacitive voltage transformers or series capacitors. A zero sequence restraint signal is used to block operation of the phase relay on close-in single line to ground faults. A filter is used in a by-pass circuit to attenuate high frequency transients which might delay, and possibly prevent a trip output on an internal fault. A high set by-pass circuit, including zero suppression to preclude an output on an external fault, is employed to provide faster operating times on severe internal faults. Forward offset and/or zero suppression of the polarizing signal is used to reduce the characteristic timer setting and therefore increase the speed of the phase relay operation.
摘要翻译： 相位继电器利用改进的极化和操作信号，以便提供交流输电线路保护区内的内部故障与外部故障之间的区别，这可能是由于由电容性电压互感器或串联电容引起的瞬变引起的内部故障。 零序约束信号用于在接近单线对地故障时阻止相位继电器的运行。 在旁路电路中使用滤波器来衰减可能延迟的高频瞬变，并可能防止内部故障的跳闸输出。 采用高设置旁路电路，包括零抑制以排除外部故障的输出，为严重的内部故障提供更快的工作时间。 使用偏振信号的正向偏移和/或零抑制来减小特征定时器设置，并因此提高相位继电器操作的速度。
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公开(公告)号：US5627712A
公开(公告)日：1997-05-06
申请号：US511248
申请日：1990-04-19
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
CPC分类号： G06F11/1435 , H02H7/0455
摘要： The reliability of transformer differential relays is enhanced by providing a method and apparatus which enable improved discrimination between transformer current differentials due to transformer inrush current and current differentials due the occurrence of an internal fault. This improvement in discrimination is provided by generating a first signal representative of currents flowing in at least two windings of the transformer, a second signal representative of a positive portion of the first signal, and a third signal representative of a negative portions of the first signal. A first output signal is generated when the magnitude of the second signal exceeds a first predetermined value, and a second output signal is generated when the magnitude of the third signal exceeds a second predetermined value. A trip signal is generated upon coincidence of the first and second output signals. Additional operate energy is generated when the magnitude of the absolute value of a vector sum operate signal, representative of the vector sum of currents flowing in at least two windings of the transformer, exceeds a first predetermined magnitude. The additional operate energy is terminated and additional restraint energy is generated when the magnitude of a percentage restraint signal, representative of the absolute values of currents flowing in a least two windings of the transformer, exceeds a second predetermined magnitude for a predetermined period of time.
摘要翻译： 变压器差动继电器的可靠性通过提供一种能够改善由于变压器浪涌电流引起的变压器电流差异和由于内部故障的发生引起的电流差异的鉴别的方法和装置得到增强。 通过产生表示在变压器的至少两个绕组中流动的电流的第一信号，表示第一信号的正部分的第二信号和表示第一信号的负部分的第三信号来提供鉴别的这种改进 。 当第二信号的幅度超过第一预定值时产生第一输出信号，并且当第三信号的幅度超过第二预定值时产生第二输出信号。 在第一和第二输出信号一致时产生跳闸信号。 当代表在变压器的至少两个绕组中流动的电流的矢量和的矢量和的运算信号的幅度的大小超过第一预定量值时，产生额外的操作能量。 当表示在变压器的至少两个绕组中流动的电流的绝对值的百分比约束信号的大小超过预定时间段的第二预定量值时，额外的操作能量被终止并且产生额外的约束能量。
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公开(公告)号：US4751604A
公开(公告)日：1988-06-14
申请号：US920306
申请日：1986-10-16
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
摘要： A protective relay, for use in protecting a predetermined protected zone of a three phase alternating current electrical power transmission line, the relay being of the type which receives a comparison signal from a remote relay by way of a communication channel, includes circuitry for detecting abnormalities in the received comparison signal. Such abnormalities are caused by, for example, errors in the communication channel, non-fundamental frequency components in the secondary current caused by current transformer saturation, and high frequency transients in the protected zone. The abnormalities are detected by subtracting a filtered demodulated signal having a frequency which is substantially equal to a fundamental frequency of the comparison signal, from an unfiltered demodulated signal. The resulting difference is a signal which comprises components caused by the abnormalities. The resulting difference signal is utilized as a restraint signal to prevent the protective relay from incorrectly generating a circuit breaker trip signal. The filtered demodulated signal is utilized as an operate signal, in conjunction with a locally generated operate signal, to produce circuit breaker trip signals.
摘要翻译： 一种用于保护三相交流电力输电线路的预定保护区域的保护继电器，该继电器是通过通信通道从远程继电器接收比较信号的类型的继电器，包括用于检测异常的电路 在接收的比较信号中。 这种异常是由于通信信道中的误差，由电流互感器饱和导致的次级电流中的非基频分量以及保护区中的高频瞬态引起的。 通过从未滤波的解调信号中减去具有基本上等于比较信号的基频的频率的滤波解调信号来检测异常。 所产生的差异是包括由异常引起的分量的信号。 所产生的差分信号用作约束信号，以防止保护继电器不正确地产生断路器跳闸信号。 滤波后的解调信号与本地生成的操作信号一起用作操作信号，以产生断路器跳闸信号。
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公开(公告)号：US4091433A
公开(公告)日：1978-05-23
申请号：US767279
申请日：1977-02-10
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
CPC分类号： H02H3/387
摘要： This protective relay circuit responds to interphase faults on a three-phase power line by causing a circuit breaker connected in the power line to be tripped three-pole in response to interphase faults, but does not respond to a single line to ground fault, allowing a single pole to be tripped for this latter type of fault.
摘要翻译： 该保护继电器电路通过使连接在电力线路中的断路器响应于相间故障而三相跳闸来对三相电力线路上的相间故障进行响应，但不对单线对地故障作出响应，允许 为了后一种类型的故障而跳闸的单极。
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公开(公告)号：US4873602A
公开(公告)日：1989-10-10
申请号：US120079
申请日：1987-11-12
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
摘要： A circuit for preventing the generation of an erroneous output signal from a protective relay for detecting faults in a three phase alternating current electrical power distribution system, which relay uses a full wave rectified signal as an operate quantity. The circuit includes a band pass filter having an input adapted to receive the full wave rectified signal; a center frequency which is tuned to the frequency of at least one principal harmonic component of the full wave rectified signal; a gain substantially equal to -1; and an output. A two-input summing amplifier has one input which is adapted to receive the full wave rectified signal and the other input which is connected to the output of the band pass filter. In the preferred embodiment, the circuit removes the second harmonic component of the full wave rectified signal thereby preventing the relay from generating a faulty trip signal for those faults beyond the reach of the relay which, but for the elimination of the increase in the magnitude of the DC level of the operate signal due to the contribution of the second harmonic component, would cause the relay to operate.
摘要翻译： 用于防止来自用于检测三相交流电配电系统中的故障的保护继电器产生错误输出信号的电路，该继电器使用全波整流信号作为操作量。 该电路包括具有适于接收全波整流信号的输入端的带通滤波器; 调整到全波整流信号的至少一个主要谐波分量的频率的中心频率; 增益大致等于-1; 和输出。 双输入求和放大器具有一个输入端，其适于接收全波整流信号，另一输入端连接到带通滤波器的输出。 在优选实施例中，电路去除全波整流信号的二次谐波分量，从而防止继电器产生超出继电器范围的那些故障的故障跳闸信号，但是为了消除 由于二次谐波分量的贡献，操作信号的直流电平将导致继电器工作。
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公开(公告)号：US4453191A
公开(公告)日：1984-06-05
申请号：US403270
申请日：1982-07-29
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
摘要： Disclosed is an overvoltage directional relay that forms a part of a relay system which provides protection for a high voltage three phase transmission line. The overvoltage directional relay provides a high speed blocking function for use with the high speed tripping functions in the protective relay system. In one embodiment the directional relay utilizes the negative-sequence components of the three phase transmission lines. In another embodiment the directional relay utilizes the zero-sequence component of the three phase transmission line.
摘要翻译： 公开了一种形成继电器系统的一部分的过电压方向继电器，其提供对高压三相传输线的保护。 过电压方向继电器提供高速阻塞功能，用于保护继电器系统中的高速跳闸功能。 在一个实施例中，定向继电器利用三相传输线的负序分量。 在另一个实施例中，定向继电器利用三相传输线的零序分量。
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公开(公告)号：US4433353A
公开(公告)日：1984-02-21
申请号：US403269
申请日：1982-07-29
申请人： Stanley B. Wilkinson
发明人： Stanley B. Wilkinson
CPC分类号： H02H3/385
摘要： Disclosed is a positive sequence undervoltage distance relay that forms a part of a relay system that provides protection for a high voltage three phase transmission line. The undervoltage distance relay provides a high speed blocking function for use with the high speed tripping functions in the protective relay system. In one embodiment the undervoltage distance relay utilizes the positive sequence components of the three phase transmission line. In another embodiment the undervoltage distance relay utilizes the line to ground (or line to line) voltages and currents of the three phase transmission line.
摘要翻译： 公开了一种正序欠压距离继电器，其构成为高压三相传输线路提供保护的中继系统的一部分。 欠压距离继电器提供高速阻塞功能，用于保护继电器系统中的高速跳闸功能。 在一个实施例中，欠压距离继电器利用三相传输线的正序分量。 在另一个实施例中，欠压距离继电器利用三相传输线的线对地（或线对线）电压和电流。
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