公开(公告)号：US08861153B2

公开(公告)日：2014-10-14

申请号：US13807850

申请日：2011-06-29

申请人： Takahiro Kase

发明人： Takahiro Kase

IPC分类号： H02H3/26 ,  H02H3/28 ,  H02H7/26

CPC分类号： H02H3/26 ,  H02H3/283 ,  H02H7/26

摘要： A current differential relay apparatus includes a ratio-differential-characteristic determining unit determining an operation in a ratio differential characteristic based on an operation level Id and a suppression level Ir, a first-current-range determining unit determining that it is activated when Id>a1Ir+b1 is satisfied, a second-current-range determining unit determining that it is activated when Id>a2Ir+b2 is satisfied with relationships a1≦a2 and b1≧b2 being satisfied where a1, a2, b1 and b2 are real numbers, and an AND operator, a reset unit, and a flip flop which determine that it is an operation in a ratio differential characteristic when both first and second current ranges are activated, and which continue the operation until an operation in the first range is reset.

摘要翻译： 电流差动继电器装置包括比率差分特性确定单元，其基于操作电平Id和抑制电平Ir确定比率差分特性中的操作;第一电流范围确定单元，当Id> 满足a1Ir + b1，当满足a1> a2Ir + b2时的第二电流范围确定单元满足关系a1＆nlE; a2和b1≥b2满足a1，a2，b1和b2是实数， 以及AND运算器，复位单元和触发器，其在第一和第二电流范围都被激活时确定其是差分特性中的运算，并且继续操作直到第一范围中的操作被重置。

公开(公告)号：US20070070565A1

公开(公告)日：2007-03-29

申请号：US11337894

申请日：2006-01-23

申请人： Gabriel Benmouyal ,  Joseph Mooney ,  Billy Turner

发明人： Gabriel Benmouyal ,  Joseph Mooney ,  Billy Turner

IPC分类号： H02H3/00

CPC分类号： H02H3/307 ,  H02H3/283 ,  H02H7/263

摘要： An apparatus and method compensate for the sensitivity of at least one line current differential element of a first current differential relay providing differential protection for a transmission line of a power system during a single-phase pole-open condition. The apparatus includes a first delta filter configured to remove a first pre-fault current from a first fault current of the transmission line to derive a compensated first current phasor. The apparatus also includes a second delta filter configured to remove a second pre-fault current from a second fault current of the transmission line to derive a compensated second current phasor. The compensated first and second current phasors are provided to the at least one line current differential element to compensate the sensitivity of the at least one line current differential element.

摘要翻译： 一种装置和方法补偿在单相极点打开状态期间为电力系统的传输线提供差动保护的第一电流差动继电器的至少一个线路电流差分元件的灵敏度。 该装置包括第一增量滤波器，其被配置为从传输线的第一故障电流去除第一预故障电流以导出补偿的第一电流相量。 该装置还包括第二增量滤波器，其被配置为从传输线的第二故障电流去除第二预故障电流以导出补偿的第二电流相量。 补偿的第一和第二电流相量被提供给至少一个线路电流差动元件以补偿至少一个线路电流差动元件的灵敏度。

公开(公告)号：US4825326A

公开(公告)日：1989-04-25

申请号：US60351

申请日：1987-06-10

申请人： Fumio Andow ,  Noriyoshi Suga

发明人： Fumio Andow ,  Noriyoshi Suga

IPC分类号： H02H3/28 ,  H02H3/44 ,  H02H7/22 ,  H02H3/08

CPC分类号： H02H3/283 ,  H02H7/22 ,  H02H3/44

摘要： In differential function calculation processing, a value of differential function f(d) is calculated using differences between a plurality of predetermined number p of differential current data Dd sampled at different sampling times. The differential current data is data obtained from differential current Id or a sum of data Dj (j=1 to n where n is the number of the respective terminal currents) obtained from respective terminal currents Ipj. In restraint data calculation processing, restraint data Dr is calculated using respective terminal current data Dj sampled at the same sampling time. In restraint function calculation processing, a value of restraint function f(r) is calculated using differences between a plurality of predetermined number p of restraint data Dr sampled at different sampling times. Then, in comparison processing, the value of differential function f(d) is compared with the value of restraint function f(r). If the value of differential function f(d) is smaller than a value, modified by a predetermined relationship, of restraint function f(r), an inhibit output is generated in the comparison processing. Differential relay processing inhibits a trip operation of a circuit breaker by the inhibit output from the comparison processing. The differential relay processing is so controlled as to execute the trip operation when the inhibit output is not present.

公开(公告)号：US09899830B2

公开(公告)日：2018-02-20

申请号：US14770240

申请日：2013-04-07

申请人： ABB Schweiz AG

发明人： Youyi Li ,  Kai Liu ,  Ivo Brncic ,  Zhanpeng Shi

IPC分类号： H02H9/02 ,  H02H3/28 ,  H02H3/00 ,  H02H7/045

CPC分类号： H02H9/02 ,  H02H3/006 ,  H02H3/28 ,  H02H3/283 ,  H02H7/045

摘要： The present invention discloses a method for detecting a fault and a current differential protection system thereof. The method for detecting fault includes calculating fault component currents, calculating an operate current and a restraint current of all terminals, and adjusting an operate level by adapting an operate-restraint characteristic according to a fault component. The method has very small operating area for external faults, which makes the method very reliable even for the case with serious CT saturation. A very big operating area for internal faults makes the method very sensitive for internal faults even for a heavy load and high resistance fault.

公开(公告)号：US20140002937A1

公开(公告)日：2014-01-02

申请号：US13929112

申请日：2013-06-27

申请人： ABB Technology AG

发明人： Mika TAUSA ,  Kari VANHALA

IPC分类号： H02H3/34

CPC分类号： H02H3/343 ,  H02H3/283 ,  H02H3/347 ,  H02H7/045 ,  H02H7/0455

摘要： A method in a three-terminal differential protection includes measuring a terminal phase current (IT1(y), IT2(y), IT3(y)) at each terminal (T1, T2, T3) of a protected zone of the differential protection in each phase (L1, L2, L3) to be protected, and determining a bias current (Ib(y)) of the phase on the basis of the terminal phase currents (IT1(y), IT2(y), IT3(y)). The bias current determination includes subtracting phasor values of the terminal phase currents of two terminals from the phasor value of the terminal phase current of one terminal. The terminal phase current, which is a minuend in the phasor difference computation, is selected on the basis of the phase angles or amplitudes of the terminal phase currents.

摘要翻译： 三端差动保护中的方法包括测量差动保护的保护区的每个端子（T1，T2，T3）处的端相相电流（IT1（y），IT2（y），IT3（y）） 根据终端相电流（IT1（y），IT2（y），IT3（y））确定相位的偏置电流（Ib（y））， ）。 偏置电流确定包括从一个端子的端子相电流的相量值中减去两个端子的端子相电流的相量值。 基于相位电流的相位角或振幅，选择相量差计算中的终端相电流。

公开(公告)号：US20120224287A1

公开(公告)日：2012-09-06

申请号：US13509983

申请日：2009-11-17

申请人： Waldemar Rebizant ,  Krzysztof Solak ,  Andrzej Wiszniewski ,  Andrzej Klimek

发明人： Waldemar Rebizant ,  Krzysztof Solak ,  Andrzej Wiszniewski ,  Andrzej Klimek

IPC分类号： H02H3/26

CPC分类号： H02H3/307 ,  H02H3/283

摘要： A relay for current differential protection of a transmission line, comprising: a first calculator of symmetrical sequence components of currents of each phase of the transmission line at local and remote ends of the transmission line; a second calculator of phase differences φ12 and φ012 between combinations currents i12 and i012 of the symmetrical sequence currents; a fuzzy inference system which outputs a variable y whose value is calculated according to the values of the phase differences φ12 and φ012; a third calculator which outputs a tripping signal for the control of a circuit breaker arranged on the transmission line and associated with the relay, the value of the tripping signal being calculated according to the values of the variable y and the values of the currents of each phase at the local and remote ends of the protected transmission line.

摘要翻译： 一种用于传输线路的电流差动保护的继电器，包括：传输线的本地和远端的传输线的各相的电流的对称序列分量的第一计算器; 在对称序列电流的组合电流i12和i012之间的相位差的第二计算器和12和＆phgr; 012; 一个模糊推理系统，它输出一个变量y，该变量的值根据相位差＆phgr; 12和＆phgr; 012的值计算; 第三计算器，其输出用于控制布置在传输线上并与继电器相关联的断路器的跳闸信号，跳闸信号的值根据变量y的值和每个的电流值计算 在受保护的传输线的本地和远端处的相位。

公开(公告)号：US07660088B2

公开(公告)日：2010-02-09

申请号：US11337894

申请日：2006-01-23

申请人： Joseph B. Mooney ,  Gabriel Benmouyal

发明人： Joseph B. Mooney ,  Gabriel Benmouyal

IPC分类号： H02H3/00 ,  H02H7/00

CPC分类号： H02H3/307 ,  H02H3/283 ,  H02H7/263

摘要： An apparatus and method compensate for the sensitivity of at least one line current differential element of a first current differential relay providing differential protection for a transmission line of a power system during a single-phase pole-open condition. The apparatus includes a first delta filter configured to remove a first pre-fault current from a first fault current of the transmission line to derive a compensated first current phasor. The apparatus also includes a second delta filter configured to remove a second pre-fault current from a second fault current of the transmission line to derive a compensated second current phasor. The compensated first and second current phasors are provided to the at least one line current differential element to compensate the sensitivity of the at least one line current differential element.

摘要翻译： 一种装置和方法补偿在单相极点打开状态期间为电力系统的传输线提供差动保护的第一电流差动继电器的至少一个线路电流差分元件的灵敏度。 该装置包括第一增量滤波器，其被配置为从传输线的第一故障电流去除第一预故障电流以导出补偿的第一电流相量。 该装置还包括第二增量滤波器，其被配置为从传输线的第二故障电流去除第二预故障电流以导出补偿的第二电流相量。 补偿的第一和第二电流相量被提供给至少一个线路电流差动元件以补偿至少一个线路电流差动元件的灵敏度。

公开(公告)号：US20030223167A1

公开(公告)日：2003-12-04

申请号：US09747345

申请日：2000-12-22

发明人： Eric A. Udren

IPC分类号： H02H003/00

CPC分类号： H02H3/28 ,  H02H3/283 ,  H02H7/008 ,  H02H7/22

摘要： A distributed bus differential relay system has a separate differential relay element at each feeder location to trip the associated circuit breaker in response to a fault in the protected bus. The only conductors between feeders form a set of leads connecting current transformers in each of the feeders in parallel. Preferably, the current transformer in each feeder also serves as the current transformer for the associated circuit breaker and the differential relay element is incorporated into the overcurrent relay or trip unit of the circuit breaker which is implemented by a microprocessor. Compliance voltage across the cts is limited by a varistor or saturating reactor which is protected from overheating by a time delayed shorting device.

摘要翻译： 分布式总线差分继电器系统在每个馈线位置具有单独的差分继电器元件，以响应受保护总线中的故障来跳闸相关联的断路器。 馈线之间的唯一导体形成一组引线，并联连接每个馈线中的电流互感器。 优选地，每个馈送器中的电流互感器还用作相关断路器的电流互感器，并且差分继电器元件被并入由微处理器实现的断路器的过电流继电器或跳闸单元中。 cts上的符合电压受限于通过时间延迟短路装置防止过热的变阻器或饱和电抗器。

公开(公告)号：US5808844A

公开(公告)日：1998-09-15

申请号：US809765

申请日：1997-08-11

申请人： Ludwig Schiel ,  Steffen Noack ,  Norbert Schuster

发明人： Ludwig Schiel ,  Steffen Noack ,  Norbert Schuster

IPC分类号： H02H3/28 ,  H02H7/045 ,  H02H3/16

CPC分类号： H02H3/283 ,  H02H7/0455

摘要： A current differential protection arrangement for an electric power supply unit with a measured value pre-processing device and an analysis device that checks on the basis of a predefined dependence of a differential current on a stabilizing current (response characteristic curve) to determine whether the differential and stabilizing current values thus formed are in a blocking range or a triggering range, where an additional stabilization range is present in the blocking range. To avoid fixed-time blocking after an external fault with transformer saturation with such a protection arrangement, the analysis device in a stabilizing circuit contains a testing arrangement which checks the current values thus formed to determine whether they describe a point in the additional stabilization range. If this is the case, a blocking signal is produced, which activates the blocking device downstream from the testing arrangement. When a first point of the current values is subsequently detected outside the additional stabilization range, a timing element that is connected at the output to a resetting input of the blocking device is set.

摘要翻译： PCT No.PCT / DE95 / 01372 Sec。 371日期1997年8月11日 102（e）日期1997年8月11日PCT提交1995年9月26日PCT公布。 公开号WO96 / 10857 日期1996年04月11日具有测量值预处理装置的电力供应单元的电流差动保护装置和基于稳定电流（响应特性曲线）的预定的差分电流依赖性的分析装置， 以确定如此形成的差分和稳定电流值是否处于阻塞范围或触发范围，其中在阻挡范围内存在额外的稳定范围。 为了避免在具有这种保护装置的变压器饱和的外部故障之后的固定时间阻塞，稳定电路中的分析装置包含检查这样形成的电流值的测试装置，以确定它们是否描述了附加稳定范围内的一个点。 如果是这种情况，则产生阻塞信号，该信号激活测试装置下游的阻塞装置。 当随后在额外的稳定范围之外检测到当前值的第一点时，设置在输出处连接到阻挡装置的复位输入的定时元件。

公开(公告)号：US4670811A

公开(公告)日：1987-06-02

申请号：US683493

申请日：1984-12-19

申请人： Nobuo Eda

发明人： Nobuo Eda

IPC分类号： H02H3/28 ,  H02H7/22 ,  H02H3/26

CPC分类号： H02H3/283 ,  H02H7/22

摘要： In a differential-type protective relay actuated to generate a signal necessary for the protection of a bus of an electric power system when a troubled current has flown through the bus, a gapped first transformer is used to receive an output from a current transformer which is adapted to detect each current in the bus. Each output of a first detection element, which is actuated when the output of the first transformer is higher than a preset level, is fed out to the exterior only when a value obtained by subtracting the sum of the maximum of the output of the first transformer and the value of a signal obtained by shifting the phase of the output through a predetermined angle from the value of a signal obtained by subjecting the output of the first transformer to full-wave transformation is equal to or lower than a preset value.

摘要翻译： 在一个差动式保护继电器中，当有困难的电流已经通过总线时，被致动以产生保护电力系统总线所必需的信号的差分式保护继电器中，使用有间隙的第一变压器来接收来自电流互感器 适用于检测总线中的每个电流。 当第一变压器的输出高于预设电平时被激励的第一检测元件的每个输出仅在通过减去第一变压器的输出的最大值的和获得的值时被馈送到外部 并且通过使从第一变压器的输出经过全波变换得到的信号的值将输出相位偏移预定角度而获得的信号的值等于或低于预设值。