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1. 发明申请

WO2011157305A1 FAULT PROTECTION OF HVDC TRANSMISSION LINES 审中-公开
标题翻译：高压直流输电线路的故障保护
公开(公告)号：WO2011157305A1
公开(公告)日：2011-12-22
申请号：PCT/EP2010/063372
申请日：2010-09-13
申请人： ABB RESEARCH LTD , BERGGREN, Bertil , WANG, Jianping , PAN, Juiping , SRIVASTAVA, Kailash , LINDEN, Kerstin , NUQUI, Reynaldo
发明人： BERGGREN, Bertil , WANG, Jianping , PAN, Juiping , SRIVASTAVA, Kailash , LINDEN, Kerstin , NUQUI, Reynaldo
IPC分类号： H02H7/26 , H02H3/38 , H02H3/42 , H02H3/44
CPC分类号： H02H3/42 , H02H3/38 , H02H3/445 , H02H7/268
摘要： A protection system (200) for high voltage direct current, HVDC, transmission lines is provided. The protection system comprises a direct current, DC, bus (201), means (202) for connecting an HVDC transmission line to the bus, at least one DC circuit breaker (203, 204) arranged for disconnecting the transmission line from the bus upon reception of a trip signal, current (211) and voltage sensors (212), an inductor (213) arranged such that the current through the transmission line passes the inductor, and a fault detection unit (220). The fault detection unit is arranged for assessing, on the basis of current and/or voltage measurements, whether a fault exists on the transmission line, and sending, if a fault is detected on the transmission line, a trip signal to the circuit breaker. The additional inductance limits the rise in fault current and facilitates a selective fault detection. Further, a method of fault protection for an HVDC transmission line is provided.
摘要翻译：提供用于高压直流，HVDC，传输线路的保护系统（200）。保护系统包括直流DC总线（201），用于将HVDC传输线连接到总线的装置（202），至少一个直流断路器（203,204），其布置成用于将传输线与总线断开接收跳闸信号，电流（211）和电压传感器（212），布置成使得通过传输线的电流通过电感器的电感器（213）和故障检测单元（220）。该故障检测单元被设置为基于当前和/或电压测量来评估传输线路上是否存在故障，并且如果在传输线路上检测到故障则发送到断路器的跳闸信号。附加电感限制故障电流的上升，并有助于选择性故障检测。此外，还提供了用于HVDC传输线的故障保护方法。

2. 发明申请

WO2011157306A1 BREAKER FAILURE PROTECTION OF HVDC CIRCUIT BREAKERS 审中-公开
标题翻译：断路器故障保护高压直流断路器
公开(公告)号：WO2011157306A1
公开(公告)日：2011-12-22
申请号：PCT/EP2010/063377
申请日：2010-09-13
申请人： ABB RESEARCH LTD , BERGGREN, Bertil , WANG, Jianping , PAN, Juiping , LINDEN, Kerstin , NUQUI, Reynaldo
发明人： BERGGREN, Bertil , WANG, Jianping , PAN, Juiping , LINDEN, Kerstin , NUQUI, Reynaldo
IPC分类号： H02H7/26 , H02H3/44 , H02H7/30
CPC分类号： H02H7/268 , H02H3/044 , H02H3/05 , H02H3/445 , H02H7/222 , H02H7/30
摘要： A breaker failure protection system (100) for a high voltage direct current, HVDC, circuit breaker (103) is provided. The circuit breaker is arranged for interrupting a DC circuit (101, 102) upon reception of a trip signal (108). The protection system comprises a current sensor (104), at least one inductor (105, 106), and a breaker failure detection unit (107). The current sensor is arranged for measuring a current I (t) through the DC circuit. The at least one inductor is connected in series with the DC circuit. The breaker failure detection unit is arranged for assessing, whether the circuit breaker has failed, and sending, if the circuit breaker has failed, a trip signal (109) to an adjacent circuit breaker. The assessment is based on the measured current. The stability of HVDC grids may be improved by sending, in case of a breaker failure, a trip signal to adjacent circuit breakers. Further, a method of breaker failure protection for an HVDC circuit breaker is provided.
摘要翻译：提供了一种用于高压直流，HVDC，断路器（103）的断路器故障保护系统（100）。断路器被布置成在接收到跳闸信号（108）时中断DC电路（101,102）。保护系统包括电流传感器（104），至少一个电感器（105,106）和断路器故障检测单元（107）。电流传感器用于测量通过直流电路的电流I（t）。至少一个电感器与DC电路串联连接。断路器故障检测单元被布置用于评估断路器是否发生故障，并且如果断路器发生故障，则发送到相邻断路器的跳闸信号（109）。评估是基于测量的电流。在断路器故障的情况下，通过发送到相邻断路器的跳闸信号，可以提高HVDC电网的稳定性。此外，还提供了一种用于HVDC断路器的断路器故障保护方法。

3. 发明申请

WO2013064176A1 TRAVELLING-WAVE BASED FAULT PROTECTION OF HIGH-VOLTAGE TRANSMISSION LINES 审中-公开
标题翻译：基于行驶波形的高压变速器线路故障保护
公开(公告)号：WO2013064176A1
公开(公告)日：2013-05-10
申请号：PCT/EP2011/069187
申请日：2011-11-01
申请人： ABB TECHNOLOGY AG , WANG, Jianping , PAN, Jiuping , NUQUI, Reynaldo
发明人： WANG, Jianping , PAN, Jiuping , NUQUI, Reynaldo
IPC分类号： H02H7/26 , G01R31/08
CPC分类号： G01R31/088 , G01R31/085 , H02H7/265
摘要： An improved method of fault detection in a high-voltage direct current (HVDC) power transmission line (101 ) is provided. The fault detection is based on fault-induced travelling waves. The method comprises estimating an amplitude of fault-induced travelling waves at the fault location (1 07), and calculating a fault resistance (Rf) based on the estimated amplitude, an estimated pre-fault voltage at the fault location, and a surge impedance of the transmission line. The estimated fault amplitude and the estimated pre-fault voltage are calculated from voltage measurements performed at both ends (102, 1 03) of the transmission line. Further, a fault detection device (1 06) is provided.
摘要翻译：提供了一种改进的高压直流（HVDC）输电线路（101）故障检测方法。故障检测基于故障引起的行波。该方法包括估计故障位置处的故障诱导行波的振幅（1 07），以及基于估计的振幅，故障位置处的估计故障前电压和浪涌阻抗来计算故障电阻（Rf）的传输线。根据在传输线的两端（102,1 03）执行的电压测量，计算出估计的故障振幅和估计的故障前电压。此外，提供故障检测装置（106）。

4. 发明申请

WO2012110088A1 METHOD AND ARRANGEMENT FOR AN INTERNAL FAILURE DETECTION IN A Y-Y CONNECTED CAPACITOR BANK 审中-公开
标题翻译： Y-Y连接电容器银行内部故障检测的方法和布置
公开(公告)号：WO2012110088A1
公开(公告)日：2012-08-23
申请号：PCT/EP2011/052290
申请日：2011-02-16
申请人： ABB RESEARCH LTD , GAJIC, Zoran , IBRAHIM, Mustafa , WANG, Jianping
发明人： GAJIC, Zoran , IBRAHIM, Mustafa , WANG, Jianping
IPC分类号： G01R31/02 , H02H7/16
CPC分类号： G01R31/40 , G01R31/02 , G01R31/42 , G05F1/70 , H02H7/16 , H02J3/1828
摘要： The present invention relates to a method for detecting an internal failure in a capacitor bank connected to a power system, wherein the capacitor bank comprises a plurality of capacitor units that are divided into two Y sections. Each phase in each of the Y sections defining a leg and each leg includes series and/or parallel-connected capacitor units. The internal failure may occur in one or more capacitor elements or units or involve one or more legs. The method comprises measuring the phase current in one of the phases (100), calculating the root mean square value, denoted by RMS, of the measured phase currents (110), measuring the unbalance current between the two sections (120), calculating the RMS value of the measured unbalance currents (130), detecting the phase angle between the measured phase current and the measured unbalance current (140), calculating the per unit value of the unbalance current based on the calculated RMS value of the measured phase current and the calculated RMS value of the measured unbalance current (145), tracking and detecting a change of the unbalance current between the present calculated per unit value of the unbalance current and the previous calculated per unit value of the unbalance current (150), determining the vectorial step change of the unbalance current (160), normalizing the phase angle of the determined vectorial step change to be one of 0°, 60°, 120°, 180°, 240° and 300° (170), identifying the number of internal failures and their corresponding locations based on the determined vectorial step change of the unbalance current and the normalized phase angle (200), and initiating an alarm or a trip signal when the determined total number of internal failures exceeds a first or a second threshold value respectively (210).
摘要翻译：本发明涉及一种用于检测连接到电力系统的电容器组中的内部故障的方法，其中电容器组包括被分成两个Y部分的多个电容器单元。限定腿部和每个腿部的每个Y部分中的每个相包括串联和/或并联连接的电容器单元。内部故障可能发生在一个或多个电容器元件或单元中，或者涉及一个或多个支脚。该方法包括测量相（100）中的一个相的相电流，计算测得的相电流（110）的均方根值（RMS），测量两段（120）之间的不平衡电流，计算测量的不平衡电流的RMS值（130），检测所测量的相电流和测量的不平衡电流之间的相位角（140），基于所测量的相电流的计算的RMS值来计算不平衡电流的每单位值，以及测量的不平衡电流（145）的计算RMS值，跟踪和检测不平衡电流当前计算的每单位值与先前计算的不平衡电流的每单位值之间的不平衡电流的变化（150），确定将确定的矢量阶跃变化的相位角归一化为0°，60°，120°，180°，240°和300°（170）之间的不平衡电流（160）的矢量级变化，id 基于确定的不平衡电流和归一化相位角（200）的矢量级变化，确定内部故障的数量及其对应的位置，并且当所确定的内部故障的总数超过第一或第二阈值（210）。

5. 发明申请

WO2012110087A1 METHOD AND ARRANGEMENT FOR DETECTING AN INTERNAL FAILURE IN H-BRIDGE CONNECTED CAPACITOR BANK 审中-公开
标题翻译：用于检测H桥连接电容器银行内部故障的方法和布置
公开(公告)号：WO2012110087A1
公开(公告)日：2012-08-23
申请号：PCT/EP2011/052279
申请日：2011-02-16
申请人： ABB RESEARCH LTD , GAJIC, Zoran , WANG, Jianping , IBRAHIM, Mustafa
发明人： GAJIC, Zoran , WANG, Jianping , IBRAHIM, Mustafa
IPC分类号： H02H7/16 , G01R31/02 , H02H3/04
CPC分类号： G01R31/028 , H02H7/16
摘要： The present invention relates to a method for detecting an internal failure in a capacitor bank connected in one phase or more phases respectively to a power system. The capacitor bank comprises a plurality of capacitor units. Each of the capacitor units comprises a plurality of capacitor elements connected in parallel and/or series. The capacitor units are further divided into two strings and a current transformer is arranged in the midpoints of the two strings so that the capacitor units are further divided into four quadrants and the internal failure(s) may occur in one or more capacitor elements or units and involves one or more capacitor quadrants. The method comprises measuring the phase current of each individual phase of the capacitor bank (100), continuously calculating the root mean square value, denoted by RMS, of the measured phase current (1 10), measuring the unbalance current (120), continuously calculating the RMS value of the measured unbalance current (130), detecting the phase angle between the measured phase current and its corresponding measured unbalance current (140), continuously calculating a per unit value of the unbalance current based on the calculated RMS value of the measured phase current and the calculated RMS value of the measured unbalance current (145), tracking and detecting a change in the calculated unbalance current between the present calculated per unit value of the unbalance current and the previous calculated per unit value of the unbalance current (160), determining the step change of the per unit value of the unbalance current (170), determining the number of internal failures and their corresponding locations based on the determined step change of the per unit value of the unbalance current and the detected phase angle (200), and initiating an alarm and/or a trip signal when the determined total number of internal elements failures exceeds a first or a second threshold value (210).
摘要翻译：本发明涉及一种用于检测在一相或更多相中连接到电力系统的电容器组中的内部故障的方法。电容器组包括多个电容器单元。每个电容器单元包括并联和/或串联连接的多个电容器元件。电容器单元进一步分为两串，并且电流互感器布置在两个串的中点处，使得电容器单元进一步分成四个象限，并且内部故障可发生在一个或多个电容器元件或单元中并且涉及一个或多个电容器象限。该方法包括测量电容器组（100）的每个单相的相电流，连续地计算测得的相电流（110）的RMS均方根值，连续测量不平衡电流（120）计算测量的不平衡电流（130）的RMS值，检测测得的相电流与其对应的测量不平衡电流之间的相位角（140），基于计算的不平衡电流的RMS值连续计算不平衡电流的每单位值测量相电流和测得的不平衡电流的计算RMS值（145），跟踪和检测不平衡电流当前计算出的每单位值与先前计算的不平衡电流单位值之间的计算不平衡电流的变化（ 160），确定不平衡电流（170）的每单位值的阶跃变化，确定内部故障的数量及其cor 基于确定的不平衡电流的每单位值的步长变化和检测到的相位角（200）的响应位置，以及当所确定的内部元件故障的总数超过第一或第二相位角时，发起报警和/或跳闸信号第二阈值（210）。

6. 发明申请

WO2013071974A1 FAULT PROTECTION IN MIXED HIGH-VOLTAGE TRANSMISSION LINES 审中-公开
标题翻译：混合高压变速器线路中的故障保护
公开(公告)号：WO2013071974A1
公开(公告)日：2013-05-23
申请号：PCT/EP2011/070391
申请日：2011-11-17
申请人： ABB RESEARCH LTD , WANG, Jianping , ALBINALI, Hussain
发明人： WANG, Jianping , ALBINALI, Hussain
IPC分类号： H02H7/26 , G01R31/08
CPC分类号： H02H7/265 , G01R31/085
摘要： An improved method of fault protection in high-voltage power transmission lines (100) comprising multiple sections (103, 104) of different type, i.e., cable or overhead line, is provided. The method comprises determining a time difference At between a first time of arrival of a fault-induced (105) travelling wave at a first end (101 ) of the transmission line and a second time of arrival of the fault-induced (105) travelling wave at a second end (102) of the transmission line, comparing the measured time difference to a plurality pre-determined time differences Δtn, wherein each time difference Δt n corresponds to a junction (101, 102, 106) between adjacent sections of the transmission line (100), and determining that the fault (105) occurred in section n f (103) of the transmission line if Δt nf nf +1. Further, a fault protection device is provided.
摘要翻译：提供了一种改进的高压输电线路（100）中的故障保护方法，其包括不同类型的多个部分（103,104），即电缆或架空线路。该方法包括确定在传输线的第一端（101）处的故障感应（105）行波的第一次到达与故障引导（105）行进的第二次到达时间之间的时间差ΔA 在所述传输线的第二端（102）处波动，将所测量的时间差与多个预定时间差Deltatn进行比较，其中每个时间差Deltatn对应于所述传输的相邻部分之间的结点（101,102,106）（100），并且如果Deltatnf

7. 发明申请

WO2010118550A1 INTELLIGENT PROCESS INTERFACE AND SUBSTATION AUTOMATION SYSTEM 审中-公开
标题翻译：智能过程接口和基站自动化系统
公开(公告)号：WO2010118550A1
公开(公告)日：2010-10-21
申请号：PCT/CN2009/000391
申请日：2009-04-13
申请人： ABB RESEARCH LTD. , WANG, Zhao , DECK, Bernhard , WANG, Jianping
发明人： WANG, Zhao , DECK, Bernhard , WANG, Jianping
IPC分类号： H02J13/00
CPC分类号： H02J13/0062 , H02H7/261 , Y02E60/723 , Y02E60/724 , Y02E60/725 , Y02E60/74 , Y02E60/7838 , Y04S10/16 , Y04S10/18 , Y04S10/20 , Y04S10/30 , Y04S40/124
摘要： An intelligent process interface (2) and a substation automation system including the intelligent process interface (2). The intelligent process interface (2) is configured to issue a command signal for operating a switch device (12) and configured to generate and transmit a network message comprising synchronized and merged signals over a communication network (31). The signals are measured by an instrument transformer (11) and/or a sensor (13) connected to the intelligent process interface (2) via an input interface. The intelligent process interface (2) is configured to generate the command signal based on one of the signals or based on a network message received from an intelligent electronic device (32).
摘要翻译：智能过程接口（2）和包括智能过程接口（2）的变电站自动化系统。智能过程接口（2）被配置为发出用于操作交换设备（12）的命令信号，并且被配置为通过通信网络（31）生成并发送包括同步和合并的信号的网络消息。信号由仪器变压器（11）和/或通过输入接口连接到智能过程接口（2）的传感器（13）测量。智能过程接口（2）被配置为基于信号中的一个或基于从智能电子设备（32）接收的网络消息来生成命令信号。

8. 发明申请

WO2010034149A1 METHOD AND DEVICE FOR SUPERVISING SECONDARY CIRCUIT OF INSTRUMENT TRANSFORMER IN POWER SYSTEM 审中-公开
标题翻译：用于监控电力系统中仪器变压器二次电路的方法和装置
公开(公告)号：WO2010034149A1
公开(公告)日：2010-04-01
申请号：PCT/CN2008/072480
申请日：2008-09-24
申请人： ABB RESEARCH LTD , SU, Bin , FAN, Jianzhong , JING, Lei , LIU, Qianjin , WANG, Jianping , YANG, Ying
发明人： SU, Bin , FAN, Jianzhong , JING, Lei , LIU, Qianjin , WANG, Jianping , YANG, Ying
IPC分类号： G01R31/06 , G01R31/00
CPC分类号： H02H7/261 , G01R31/027 , H02H3/05 , H02H3/40
摘要： A method for supervising a secondary circuit of an instrument transformer in a power system, the instrument transformer is connected to a power system, the method comprises: detecting, by a protection Intelligent Electronic Device, protection IED, which is connected to the secondary circuit of the instrument transformer and protects the power system component, disturbances in a signal from the instrument transformer; and determining whether a failure occurs in the secondary circuit of the instrument transformer, according to both a disturbance detection result from the protection IED and another disturbance detection result from at least one of other protection IEDs, the other protection IEDs comprising protection IEDs which are connected to other secondary circuits of the instrument transformer or to secondary circuits of another instrument transformer connected to the power system component, and protection IEDs which are connected to other instrument transformers connected to other power system components connected to the same busbar as the power component is connected to. A protection Intelligent Electronic Device, protection IED, for supervising a secondary circuit of an instrument transformer in a power system.
摘要翻译：一种监控电力系统中仪表变压器二次回路的方法，仪表变压器与电力系统连接，该方法包括：通过保护智能电子设备检测保护IED，该保护IED连接到二次回路仪表变压器保护电力系统部件，仪表变压器信号的干扰; 以及根据来自保护IED的干扰检测结果和来自其它保护IED中的至少一个的另一个干扰检测结果，确定在仪表变压器的次级电路中是否发生故障，其他保护IED包括被连接的保护IED 到仪器变压器的其他二次回路或连接到电力系统组件的另一台仪表变压器的二次回路，以及与连接到连接到与功率部件相连的同一母线上的其他电力系统组件的其他仪表变压器连接的保护IED 至。保护智能电子设备，保护IED，用于监控电力系统中仪表变压器的二次回路。

9. 发明申请

WO2013004285A1 SYSTEM FOR DETECTING INTERNAL WINDING FAULTS OF A SYNCHRONOUS GENERATOR, COMPUTER PROGRAM PRODUCT AND METHOD 审中-公开
标题翻译：用于检测同步发电机内部绕组故障的系统，计算机程序产品和方法
公开(公告)号：WO2013004285A1
公开(公告)日：2013-01-10
申请号：PCT/EP2011/061188
申请日：2011-07-04
申请人： ABB RESEARCH LTD , GAJIC, Zoran , IBRAHIM, Mustafa , MARINOPOULOS, Antonis , RODRIGUEZ, Pedro , WANG, Jianping , WANG, Liwei
发明人： GAJIC, Zoran , IBRAHIM, Mustafa , MARINOPOULOS, Antonis , RODRIGUEZ, Pedro , WANG, Jianping , WANG, Liwei
IPC分类号： H02P29/02 , G01R31/34 , H02H3/253 , H02H7/09
CPC分类号： H02H3/04 , G01R31/343 , H02H7/06 , H02P29/0241
摘要： A system, method and computer program product for monitoring including detecting internal faults especially inter-turn faults of a synchronous generator (1) and thus protecting the synchronous generator (1). The synchronous generator (1) comprises a winding (20, 23, 26) for each phase (a-c) of a power network (3), a terminal (5a-c) for each phase (a-c) arranged on a terminal side (4) of the synchronous generator (1), and connected to the respective winding, the terminals (5a-c) on the terminal side (4) is connected to an electrical power network (3), and the synchronous generator (1) is arranged to input power to the electrical power network (3) by means of the terminals (5). The method comprises measuring (301, 501) the voltage (V a , V b , V c ) of each phase at the at least one each terminal and the current (I a , I b , I c ) of each phase at the terminal, determining (302, 305, 306, 502-506) whether the synchronous generator suffers from an internal fault in any of its phases. The determining includes transforming (302, 502) the measured phase currents (I a , I b , I c ) and the measured phase voltages (V a , V b , V c ) into symmetric sequence currents (I 1 , I 2 , I 0 ) and symmetric sequence voltages (V 1 , V 2 , V 0 ), respectively. The method further includes monitoring (305, 505) at least one of the following variables: a negative sequence residual voltage (ΔV 2 ); a zero sequence residual voltage (ΔV 0 ); a negative sequence coupling impedance (Z 2C ); a zero sequence coupling impedance (Z 0C ); wherein each of the variables is calculated from symmetric sequence components (I 1 , I 2 , I 0 , V 2 , V 0 ) and at least one generator specific impedance (Z 00 , Z 22 ), and determining (306, 504, 506) whether the synchronous generator suffers from a winding fault, or not, from the calculated at least one residual voltage (ΔV 0 , ΔV 2 ) or coupling impedance (Z 0C , Z 2C ). The detecting system comprises a measurement circuit (40) arranged for measuring terminal phase voltages (V a , V b , V c ) and terminal phase currents (I a , I b , I c ) measurements; a mathematical transformation provider (42) for transforming each phase voltages (V a , V b , V c ) into symmetrical sequence voltage components (U 1 , U 2 , U 0 ) and each phase currents (I a , I b , I c ) into symmetrical sequence current components (I 1 , I 2 , I 0 ), and a winding fault determiner (44) adapted to detect internal winding faults in the synchronous generator from the negative sequence components (U 2 , I 2 ), or the zero sequence components (U 0 , I 0 ), of the voltages and currents.
摘要翻译：一种用于监测的系统，方法和计算机程序产品，包括检测内部故障，特别是同步发电机（1）的匝间故障，从而保护同步发电机（1）。同步发电机（1）包括用于电网（3）的每相（ac）的绕组（20,23,26），布置在端子侧（4）上的每相（ac）的端子（5a-c）），并且连接到各个绕组，端子侧（4）上的端子（5a-c）连接到电力网络（3），并且同步发电机（1）被布置通过端子（5）向电力网络（3）输入电力。该方法包括：测量（301,501）在该终端的每个端点处的每个相位的每相的电压（Va，Vb，Vc）和终端处的每相的电流（Ia，Ib，Ic），确定（302,305），306,502-506）同步发电机是否在任何相位中遭受内部故障。确定包括将测量的相电流（Ia，Ib，Ic）和测量的相电压（Va，Vb，Vc）变换（302,502）到对称的序列电流（I1，I2，I0）和对称的序列电压（V1， V2，V0）。该方法进一步包括监视（305,505）以下变量中的至少一个：负序残差电压（ΔV2）; 零序残余电压（ΔV0）; 负序耦合阻抗（Z2C）; 零序耦合阻抗（Z0C）; 其中每个变量由对称序列分量（I1，I2，I0，V2，V0）和至少一个发电机专用阻抗（Z00，Z22）计算，以及确定（306,504,506）同步发电机是否遭受来自所计算的至少一个残余电压（ΔV0，ΔV2）或耦合阻抗（Z0C，Z2C）的绕组故障。检测系统包括测量电路（40），用于测量端子相电压（Va，Vb，Vc）和端子相电流（Ia，Ib，Ic）测量值; 用于将每个相电压（Va，Vb，Vc）变换成对称的序列电压分量（U1，U2，U0）和每个相电流（Ia，Ib，Ic）的数学变换提供器（42） I2，I0）和绕组故障确定器（44），其适于从所述负序分量（U2，I2）或所述电压和电流的零序分量（U0，I0）检测所述同步发电机中的内部绕组故障。

10. 发明申请

WO2009156309A1 CIRCUIT BREAKER WITH IMPROVED RE-CLOSING FUNCTIONALITY 审中-公开
标题翻译：断路器具有改进的重新闭合功能
公开(公告)号：WO2009156309A1
公开(公告)日：2009-12-30
申请号：PCT/EP2009/057480
申请日：2009-06-16
申请人： ABB RESEARCH LTD , BENGTSSON, Tord , OLGUIN, Gabriel , WANG, Jianping
发明人： BENGTSSON, Tord , OLGUIN, Gabriel , WANG, Jianping
IPC分类号： H02H3/06 , H02H11/00
CPC分类号： H02H3/06 , H01H75/04 , H02H11/005
摘要： The present invention concerns a circuit breaker (18) for protecting a power line (14). The circuit breaker (18) includes a control unit (26) and a circuit breaking element (20) disconnecting the power line (14) from a power source. The control unit (26) detects a fault on the power line (14), opens the circuit breaking element (20), which opening starts a disconnection time interval, injects a test signal (t (f)) into the power line, measures a response (U (f)), (I (f)), determines an impedance of the power line (14) from the response (U (f)), (I (f)), analyses the impedance during the time interval based on comparing the impedance with a reference threshold, determines a permanent or a temporary fault based on the analysed impedance, re-closes the circuit breaking element (20) after the time interval if the fault is temporary and keeps the circuit breaking element (20) open after the time interval if the fault is permanent.
摘要翻译：本发明涉及一种用于保护电力线（14）的断路器（18）。断路器（18）包括控制单元（26）和从电源断开电力线（14）的断路元件（20）。控制单元（26）检测电力线（14）上的故障，断开断路元件（20），该断路开始断开时间间隔，向电力线注入测试信号（t（f）），测量响应（U（f）），（I（f））根据响应（U（f）），（I（f））确定电力线（14）的阻抗，分析在时间间隔期间的阻抗基于将阻抗与参考阈值进行比较，基于所分析的阻抗确定永久或临时故障，如果故障是暂时的，则在时间间隔之后重新关闭断路元件（20）并保持断路元件（20 ）如果故障是永久性的，则在时间间隔后打开。

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