公开(公告)号：EP1207609B1

公开(公告)日：2011-01-05

申请号：EP01402939.1

申请日：2001-11-15

申请人： AREVA T&D SAS

发明人： Carrillo, Jean-Jacques

IPC分类号： H02H3/28

CPC分类号： H02H3/283

公开(公告)号：EP0783788A1

公开(公告)日：1997-07-16

申请号：EP95933317.0

申请日：1995-09-26

申请人： SIEMENS AKTIENGESELLSCHAFT

发明人： SCHIEL, Ludwig, Dr. ,  NOACK, Steffen ,  SCHUSTER, Norbert

IPC分类号： H02H3 ,  H02H7

CPC分类号： H02H3/283 ,  H02H7/0455

摘要： A current differential protection arrangement for an electric energy supply unit has a measurement value pre-processing device and an evaluating device that checks whether the calculated differential and stabilisation current values lie in a locking or in a triggering range based on a predetermined relation between the differential current and a stabilisation current (characteristic reaction curve). An additional stabilisation range is provided in the locking range. In order to prevent such a protection device from causing a time-locked blocking state following an outer defect and causing saturation of the converter, the evaluating device (21) has a checking device (30) in a stabilising circuit (25) that checks whether the calculated current values define a point in the additional stabilisation range (31). If that is the case, a locking signal is generated to activate a locking device (37) arranged downstream of the checking device (30). When the detected current values subsequently define for the first time a point located outside of the additional stabilisation range (31), a time function element (40) is switched whose output is connected to a resetting input of the blocking device (38).

公开(公告)号：EP0641496A1

公开(公告)日：1995-03-08

申请号：EP93910509.0

申请日：1993-05-07

申请人： ASEA BROWN BOVERI AB

发明人： SAHA, Murari, Mohan ,  WENNERLUND, Per

IPC分类号： H02H3

CPC分类号： H02H3/283

摘要： A method and a device for preventing understabilization of longitudinal differential protections in case of external faults and current transformer saturation. The invention comprises an extension of the state of the art with regard to stabilization of longitudinal differential protections in such a way that the values (A1, A2, ... An), ( phi 1, phi 2, ... phi n), obtained via current measurement (C1, C2, ... Cn) and Fourier filters (4, 5, 6), for determining the function characteristic of the protection under certain conditions as regards current amplitude and current transformer saturation are given corrected values (A1k, A2k, ... Ank), ( phi 1k, phi 2k, ... phi nk).

公开(公告)号：EP0155408B1

公开(公告)日：1988-08-17

申请号：EP84116445.2

申请日：1984-12-28

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Eda, Nobuo c/o Mitsubishi Denki Kabushiki Kaisha

IPC分类号： H02H3/28

CPC分类号： H02H3/283 ,  H02H7/22

公开(公告)号：EP0098721B1

公开(公告)日：1988-01-20

申请号：EP83303690.8

申请日：1983-06-27

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Ebisaka, Toshinobu

IPC分类号： H02H3/26

CPC分类号： H02H3/283

公开(公告)号：EP0249215A1

公开(公告)日：1987-12-16

申请号：EP87108390.3

申请日：1987-06-10

申请人： KABUSHIKI KAISHA TOSHIBA

发明人： Andow, Fumio c/o Patent Division ,  Suga, Noriyoshi c/o Patent Division

IPC分类号： H02H7/22 ,  H02H3/28

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

摘要： In differential function calculation processing (1), 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 (2), restraint data Dr is calculated using respective terminal current data Dj sampled at the same sampling time. In restraint function calculation pro­cessing (3), 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 (4), 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 (S2 or f(s)) is gen­erated in the comparison processing (4). Differential relay processing (5) inhibits a trip operation of a cir­cuit breaker by the inhibit output (S2 or f(s)) from the comparison processing (4). The differential relay pro­cessing (5) is so controlled as to execute the trip operation when the inhibit output (S2 or f(s)) is not present.

摘要翻译： 在差分函数计算处理（1）中，使用在不同采样时间采样的多个预定数量的差分电流数据Dd之间的差异来计算微分函数f（d）的值。 差分电流数据是从各个端子电流Ipj获得的从差分电流Id获得的数据或数据Dj（j = 1至n，其中n是各个端子电流的数量）之和。 在约束数据计算处理（2）中，使用在相同采样时间采样的各个终端电流数据Dj来计算约束数据Dr。 在约束函数计算处理（3）中，使用在不同采样时间采样的多个预定数量的限制数据Dr之间的差异来计算约束函数f（r）的值。 然后，在比较处理（4）中，将微分函数f（d）的值与约束函数f（r）的值进行比较。 如果差分函数f（d）的值小于约束函数f（r）的预定关系修改的值，则在比较处理（4）中产生禁止输出（S2或f（s））， 。 差分继电器处理（5）通过禁止输出（S2或f（s））禁止来自比较处理（4）的断路器的跳闸操作。 差分继电器处理（5）被控制为当禁止输出（S2或f（s））不存在时执行跳闸操作。

公开(公告)号：EP0098721A3

公开(公告)日：1985-08-21

申请号：EP83303690

申请日：1983-06-27

申请人： MITSUBISHI DENKI KABUSHIKI KAISHA

发明人： Ebisaka, Toshinobu

IPC分类号： H02H03/32

CPC分类号： H02H3/283

摘要： A differential protection relay provides improved discrimination in the presence of an external fault, and reduced sensitivity to transient responses, by detecting the state of equality between incoming and outgoing currents and inhibiting operation of the relay for a predetermined period after the incoming and outgoing currents have been determined to be equal. An arithmetic unit 84 detects a difference current due to an internal fault and provides an operating signal. An inhibit signal generator 86 normally produces operation-inhibiting signals. Arithmetic units 82, 83 respond to the resultant values of the measured incoming and outgoing currents and, if the ratio between the resultant values exceeds a predetermined threshold, provide output signals intended to block the inhibit signals and thereby allow the relay to operate. An arithmetic unit 81 detects equality of the resultant incoming and outgoing current values and through a timer 85 ensures that the- inhibit signal generator 86 continues to produce inhibit signals for a predetermined time after it has creased to detect that the resultant values are equal. The unit 81 and timer 85 thereby override the effect of the units 82, 83 and ensure that the relay cannot operate for a predetermined time after the resultant current values have been detected as being equal.

公开(公告)号：EP2984719A4

公开(公告)日：2016-12-07

申请号：EP13881637

申请日：2013-04-07

申请人： ABB TECHNOLOGY LTD

发明人： LI YOUYI ,  LIU KAI ,  BRNCIC IVO ,  SHI ZHANPENG

IPC分类号： 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.

摘要翻译： 本发明公开了一种故障检测方法及其电流差动保护系统。 用于检测故障的方法包括计算故障分量电流，计算所有终端的工作电流和约束电流，以及通过根据故障分量适应操作限制特性来调整操作电平。 该方法对外部故障的操作面积非常小，即使对于严重CT饱和的情况，该方法也非常可靠。 内部故障的非常大的操作区域使得该方法对于内部故障甚至对于重负载和高电阻故障也非常敏感。

公开(公告)号：EP2680385A9

公开(公告)日：2014-03-05

申请号：EP12174387.6

申请日：2012-06-29

申请人： ABB Technology AG

发明人： Tausa, Mika ,  Vanhala, Kari

IPC分类号： H02H3/26

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

摘要： A method in a three-terminal differential protection comprises measuring a terminal phase current ( I T 1( y ) , I T 2( y ) , I T 3( 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 ( I b ( y ) ) of the phase on the basis of the terminal phase currents ( I T 1( y ) , I T 2( y ) , I T 3( y ) ). The bias current determination comprises 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 being a minuend in the phasor difference computation is selected on the basis of the phase angles or amplitudes of the terminal phase currents.

公开(公告)号：EP2680385A1

公开(公告)日：2014-01-01

申请号：EP12174387.6

申请日：2012-06-29

申请人： ABB Technology AG

发明人： Tausa, Mika ,  Vanhala, Kari

IPC分类号： H02H3/26

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

摘要： A method in a three-terminal differential protection comprises measuring a terminal phase current ( I T 1( y ) , I T 2( y ) , I T 3( 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 ( I b ( y ) ) of the phase on the basis of the terminal phase currents ( I T 1( y ) , I T 2( y ) , I T 3( y ) ). The bias current determination comprises 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 being 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： 三端差分保护的方法包括在保护区的保护区的每个终端（T1，T2，T3）处测量终端相电流（IT 1（y），IT 2（y），IT 3（y） 根据端子相电流（IT 1（y），IT 2（y））确定相位保护的各相（L1，L2，L3）的差动保护和相位的偏置电流（I b（y） ），IT 3（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。 基于相位角或相位电流的振幅，选择相量差计算中的终端相电流。