公开(公告)号：US20120206149A1

公开(公告)日：2012-08-16

申请号：US13503711

申请日：2009-11-18

申请人： Bin Su ,  Youyi Li ,  Ying Yang

发明人： Bin Su ,  Youyi Li ,  Ying Yang

IPC分类号： G01R31/12

CPC分类号： H02H3/402

摘要： The invention relates to a ground distance protection method, which comprises: measure local source impedance based on fault component at both ends (M, N) of the transmission line in the case of a ground distance fault has occurred. Send the measured local source impedance from a first end to a second end. Adjust a protection criterion at the second end based on the measured impedance. And, judge the ground fault as an internal fault or an external fault according to the adjusted protection criterion. The invention also relates to a controller, a piece of software and an apparatus for implementing the same function.

摘要翻译： 本发明涉及一种地面距离保护方法，其包括：在发生地面距离故障的情况下，基于传输线两端（M，N）的故障分量测量局部源阻抗。 将测量的本地源阻抗从第一端发送到第二端。 根据测量的阻抗调整第二端的保护标准。 并根据调整后的保护标准判断接地故障为内部故障或外部故障。 本发明还涉及一种用于实现相同功能的控制器，软件和装置。

公开(公告)号：US20100121594A1

公开(公告)日：2010-05-13

申请号：US12270417

申请日：2008-11-13

申请人： John James Dougherty ,  Dale Finney ,  Senthoor Navaratnam

发明人： John James Dougherty ,  Dale Finney ,  Senthoor Navaratnam

IPC分类号： G01R27/16 ,  G01R35/00

CPC分类号： H02H3/006 ,  G01R19/2513 ,  H02H3/402

摘要： A device and method for dynamically determining an impedance of a network is disclosed. The device includes at least a processing system for measuring a network voltage and network current when said network is determined to be in a first state, measuring a network voltage when said network is determined to be in a second state, estimating said impedance value dependent upon said measured voltages and current, adapting said estimated impedance based on at least one prior impedance value and storing at least said adapted impedance.

摘要翻译： 公开了一种用于动态地确定网络的阻抗的装置和方法。 该装置至少包括一个处理系统，用于当所述网络被确定为处于第一状态时测量网络电压和网络电流，当所述网络被确定为处于第二状态时测量网络电压，估计所述阻抗值取决于 所述测量的电压和电流，基于至少一个先前阻抗值调整所述估计阻抗并且至少存储所述适配阻抗。

公开(公告)号：US20030078745A1

公开(公告)日：2003-04-24

申请号：US09999837

申请日：2001-10-24

发明人： Jeffrey B. Roberts

IPC分类号： G01R027/00

CPC分类号： H02H3/402 ,  G01R31/025 ,  H02H3/081

摘要： The directional element, following enablement under selected input current conditions, calculates a zero sequence impedance, in response to values of zero sequence voltage and zero sequence current. The current value is selected between two possible values, one being the value from an associated current transformer, the other being the sum of the currents IAnullIBnullIC. The calculated zero sequence impedance is then compared against sensitive selected threshold values, established particularly for ungrounded systems. A forward fault indication is provided when the calculated zero sequence impedance is above a first established sensitive threshold value, and a reverse fault indication is provided when the calculated zero sequence impedance is below a second established sensitive threshold value.

摘要翻译： 响应于零序电压和零序电流的值，在选定的输入电流条件下启用的方向元件计算零序阻抗。 当前值在两个可能的值之间选择，一个是来自相关联的电流互感器的值，另一个是电流IA + IB + IC的总和。 然后将计算的零序阻抗与特别为未接地系统建立的敏感选定阈值进行比较。 当所计算的零序阻抗高于第一建立的敏感阈值时提供正向故障指示，并且当所计算的零序阻抗低于第二建立的敏感阈值时提供反向故障指示。

公开(公告)号：US06239959B1

公开(公告)日：2001-05-29

申请号：US09343466

申请日：1999-06-30

申请人： George E. Alexander

发明人： George E. Alexander

IPC分类号： H02H318

CPC分类号： H02H3/402

摘要： An improved reactance characteristic for an overall ground distance quadrilateral characteristic embodies a particular phase selector, possibly among a plurality of phase selectors and variables, that eliminates undesirable generation of a tripping signal other than only for a selected phase to ground fault. This phase selector is I1FZ1, where Z1 is the positive sequence replica impedance and I1F is the fault component of the positive sequence current component, referenced to the proper phase. Preferably, the pre-fault load current is removed from this quantity. Additionally, an improved restricted phase directional function is implemented, further improving the overall performance of the quadrilateral characteristic relay.

摘要翻译： 整个地面距离四边形特性的改进的电抗特性体现了可能在多个相位选择器和变量之中的特定相位选择器，其消除不仅仅对于选定的相对地故障产生跳闸信号。 这个相位选择器是I1FZ1，其中Z1是正序复制阻抗，I1F是正序电流分量的故障分量，参考正确的相位。 优选地，从该数量去除故障前负载电流。 另外，实现了改进的限制相位方向功能，进一步提高了四边形特征继电器的整体性能。

公开(公告)号：US5790418A

公开(公告)日：1998-08-04

申请号：US544274

申请日：1995-10-17

申请人： Jeffrey B. Roberts ,  Daqing Hou

发明人： Jeffrey B. Roberts ,  Daqing Hou

IPC分类号： H02H3/00 ,  H02H3/40 ,  H02H3/26

CPC分类号： H02H3/402 ,  H02H3/006

摘要： At least two different time constants are used to produce the polarizing memory reference voltage which in turn is used in a protective relay for power transmission lines. For most conditions, a relative short time constant of 1.75 cycles is used, while under other specific conditions, determined automatically, a longer time constant of 15.75 cycles is used.

摘要翻译： 使用至少两个不同的时间常数来产生极化存储器参考电压，其又用于输电线路的保护继电器。 对于大多数条件，使用1.75个周期的相对短时间常数，而在其他特定条件下，自动确定，使用15.75个周期的较长时间常数。

公开(公告)号：US5764044A

公开(公告)日：1998-06-09

申请号：US907250

申请日：1997-08-06

申请人： Fernando Calero

发明人： Fernando Calero

IPC分类号： G06F7/02 ,  G01R19/00 ,  G01R19/25 ,  G01R21/133 ,  G01R25/00 ,  G01R31/00 ,  G01R31/02 ,  G06F1/02 ,  H02H3/00 ,  H02H3/38 ,  H02H3/40 ,  G01R23/175

CPC分类号： G01R19/0038 ,  G01R19/25 ,  G01R25/00 ,  H02H3/382 ,  H02H3/385 ,  G01R19/2513 ,  G01R21/133 ,  G01R31/02 ,  H02H3/003 ,  H02H3/38 ,  H02H3/402

摘要： A numerical comparator employs numerical techniques based upon the behavior of the cylinder unit to compare phasors in real time. In one application, the torque signal generated by the numerical comparator, M.sub.k+1, is employed to determine whether a fault has occurred in a transmission line. Another application involves employing the output M.sub.k+1 to determine the direction of power flow in the transmission line. In yet another application, the output M.sub.k+1 is used to determine whether a voltage or current has exceeded a predetermined threshold. In yet another application, time dependent waveforms of positive and negative symmetrical sequence components are digitally produced.

摘要翻译： 数值比较器使用基于气缸单元的行为的数值技术来实时比较相量。 在一个应用中，由数字比较器Mk + 1产生的转矩信号用于确定传输线路中是否发生故障。 另一个应用包括采用输出Mk + 1来确定传输线中的功率流的方向。 在另一个应用中，输出Mk + 1用于确定电压或电流是否已经超过预定阈值。 在另一个应用中，数字地产生正负对称序列分量的时间相关波形。

公开(公告)号：US5661664A

公开(公告)日：1997-08-26

申请号：US515274

申请日：1995-08-15

申请人： Damir Novosel ,  Arun G. Phadke

发明人： Damir Novosel ,  Arun G. Phadke

IPC分类号： G01R31/08 ,  H02H3/40

CPC分类号： H02H3/402 ,  G01R31/088

摘要： A one-terminal process for locating a fault associated with a transmission system is disclosed. The process is based on the principle fault sequence can be determined by a distribution factor in positive faults may be any defect among phases or ground. The process begins by one end of a transmission line. If the data is oscillographic data, measured data is in phasor form, or after phasors have been calculated determined. Thereafter, a decision is made whether the pre-fault data data is sound, an equation is selected to calculate the fault location decision is made whether the phase is a three-phase fault. Then, a employed to compensate for the fault through a resistance by measuring part of the apparent line impedance. If the fault is not a three-phase formula is not employed and the appropriate equation is selected for the fault location parameter. Accurate fault location techniques for also disclose. The system is insensitive to the zero sequence current information about the system source impedances is required.

摘要翻译： 公开了一种用于定位与传输系统相关的故障的单终端过程。 该过程是基于原理故障序列可以由分布因子确定的，在正断层中可能是相间或地面有任何缺陷。 该过程从传输线的一端开始。 如果数据是示波数据，则测量数据是相量形式，或者在相量计算确定之后。 此后，判定故障前数据是否为声音，选择方程式来计算故障位置判定是否为三相故障。 然后，通过测量表观线路阻抗的一部分，通过电阻来补偿故障。 如果故障不是三相公式，则不使用故障定位参数选择适当的方程。 准确的故障定位技术也披露。 系统对零序电流信息不敏感，需要系统源阻抗。

公开(公告)号：US5140492A

公开(公告)日：1992-08-18

申请号：US508048

申请日：1990-04-11

申请人： Edmund O. Schweitzer, III

发明人： Edmund O. Schweitzer, III

IPC分类号： H02H3/40

CPC分类号： H02H3/402

摘要： A distance relay for protection of power transmission lines, having a plurality of mho elements, each with a predetermined mho impedance characteristic. The relay has the capability of calculating a polarized reference voltage which remains constant through fluctuations in measured transmission line voltage. The difference voltage between the measured line voltage and the product of the measured line current and the mho element characteristic impedance is then compared against the polarized reference voltage in a product-type phase comparator to determine under-impedance conditions. If an under-impedance condition is present, the mho element produces a set output and a calculated "torque" value. The set outputs, if any, are then compared against a look-up table for fault type determination. If more than one set output is present, the magnitudes of the respective torque values are compared for fault type determination.

摘要翻译： 一种距离继电器，用于保护输电线路，具有多个多个元件，每个元件具有预定的mho阻抗特性。 继电器具有计算经测量的传输线电压波动保持恒定的偏振参考电压的能力。 然后将所测量的线路电压和测量的线路电流与主元件特性阻抗的乘积之间的差值电压与产品型相位比较器中的极化参考电压进行比较，以确定欠阻抗条件。 如果存在欠阻抗条件，则mho元件产生设定输出和计算出的“转矩”值。 然后将设置的输出（如果有的话）与查找表进行比较以进行故障类型确定。 如果存在多个设定输出，则相应的扭矩值的大小被比较以用于故障类型确定。

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

IPC分类号： H02H3/40 ,  H02H3/26

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。

公开(公告)号：US4420788A

公开(公告)日：1983-12-13

申请号：US403273

申请日：1982-07-29

申请人： Stanley B. Wilkinson ,  George E. Alexander

发明人： Stanley B. Wilkinson ,  George E. Alexander

IPC分类号： H02H3/05 ,  H02H3/38 ,  H02H3/40 ,  H02H3/26 ,  H02H7/26

CPC分类号： H02H3/402 ,  H02H3/382

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。