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1. 发明申请

WO2013106985A1 METHOD FOR IDENTIFYING FAULT DIRECTION WITHOUT VOLTAGE MEASUREMENT INFORMATION AND DIRECTIONAL ELEMENT THEREOF 审中-公开
标题翻译：无电压测量信息识别故障方向的方法及其方向元件
公开(公告)号：WO2013106985A1
公开(公告)日：2013-07-25
申请号：PCT/CN2012/070424
申请日：2012-01-16
申请人： ABB RESEARCH LTD. , LI, Youyi , SU, Bin
发明人： LI, Youyi , SU, Bin
IPC分类号： G01R31/08 , H02H3/38
CPC分类号： H02H7/28 , G01R31/086 , H02H3/302 , H02H7/261
摘要： The present invention discloses a method for identifying the fault direction without voltage measurement information and directional element thereof, which comprises: as to any one of protections, measuring the current value of the local line; calculating the fault component current based on said current value, and further calculating the phase angle of said fault component current; obtaining the phase angles of fault component currents from at least other two lines which are connected to the same busbar with said local line; comparing the phase angle of fault component current of said local line with that of the other lines; and identifying the fault direction based on the result of the comparison. The proposed methods and directional element without voltage measurement information can be used in both distribution and transmission systems. It shall be noted that the proposed solutions can also be used for any applications which need fault direction without available voltage information.
摘要翻译：本发明公开了一种用于识别无电压测量信息及其方向元件的故障方向的方法，包括：对任何一种保护，测量局部线路的当前值; 基于所述当前值计算故障分量电流，并进一步计算所述故障分量电流的相位角; 从与所述局部线连接到同一母线的至少其他两条线获得故障分量电流的相位角; 将所述局部线路的故障分量电流的相位角与其他线路的相位角进行比较; 并根据比较结果识别故障方向。所提出的无电压测量信息的方法和方向元件可用于分布和传输系统。应当注意，所提出的解决方案还可以用于任何需要故障方向而不具有可用电压信息的应用。

2. 发明申请

WO2011079460A1 METHOD AND APPARATUS FOR DETECTING COMMUNICATION CHANNEL DELAY ASYMMETRY 审中-公开
标题翻译：用于检测通信信道延迟不对称的方法和装置
公开(公告)号：WO2011079460A1
公开(公告)日：2011-07-07
申请号：PCT/CN2009/076347
申请日：2009-12-31
申请人： ABB RESEARCH LTD. , SU, Bin , LI, Youyi , EINARSSON, Torbjorn
发明人： SU, Bin , LI, Youyi , EINARSSON, Torbjorn
IPC分类号： H04L7/00
CPC分类号： H04J3/0682 , H02H1/0061 , H02H3/30 , H04J3/065 , H04J3/0658
摘要： The invention provides a method and apparatus for detecting communication channel delay asymmetry between transmission line protection devices. The method comprises: calculating, repeatedly, clock disparity between clocks of the protection devices and communication delays at different paths of the communication channel; comparing the latest calculated clock disparity and communication delays with previously calculated clock disparities and communication delays, respectively; determining a channel switching has happened if a change of the calculated clock disparity exceeds a first threshold, or a change of the calculated communication delays for any path exceeds a second threshold; and determining the channel delays as asymmetrical if a difference between the calculated communication delays of the different paths after the channel switching exceeds a third threshold.
摘要翻译：本发明提供一种用于检测传输线路保护装置之间的通信信道延迟不对称的方法和装置。该方法包括：重复地计算保护装置的时钟之间的时钟差异和在通信信道的不同路径处的通信延迟; 将最新计算的时钟差异和通信延迟与先前计算的时钟差异和通信延迟进行比较; 如果所计算的时钟视差的改变超过第一阈值或者所计算的任何路径的通信延迟的改变超过第二阈值，则确定频道切换已经发生; 以及如果在频道切换之后所计算的不同路径的通信延迟之间的差超过第三阈值，则将所述信道延迟确定为不对称。

3. 发明申请

WO2011060578A1 METHOD AND APPARATUS FOR GROUND DISTANCE PROTECTION 审中-公开
标题翻译：地面距离保护方法与装置
公开(公告)号：WO2011060578A1
公开(公告)日：2011-05-26
申请号：PCT/CN2009/075004
申请日：2009-11-18
申请人： ABB RESEARCH LTD. , SU, Bin , LI, Youyi , YANG, Ying
发明人： SU, Bin , LI, Youyi , YANG, Ying
IPC分类号： H02H7/26
CPC分类号： H02H3/402
摘要： A ground distance protection method comprises the following steps: measuring a local source impedance based on the fault component at both ends (M, N) of a transmission line when a ground fault has occurred; sending the measured local source impedance from a first end to a second end; adjusting a protection criterion at the second end based on the measured local source impedance; and judging the ground fault as an internal fault or an external fault according to the adjusted protection criterion. The ground distance protection can suppress over-reaching or under-reaching trip during a protection operation.
摘要翻译：地面距离保护方法包括以下步骤：当发生接地故障时，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; 基于测量的本地源阻抗来调整第二端的保护标准; 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。地面距离保护可以在保护操作期间抑制过度或不足的行程。

4. 发明申请

WO2012061978A1 SYNCHRONIZATION METHOD FOR CURRENT DIFFERENTIAL PROTECTION 审中-公开
标题翻译：电流差动保护同步方法
公开(公告)号：WO2012061978A1
公开(公告)日：2012-05-18
申请号：PCT/CN2010/078562
申请日：2010-11-09
申请人： ABB RESEARCH LTD. , LI, Youyi , SU, Bin , YANG, Ying , EINARSSON, Torbjorn , GAJIC, Zoran
发明人： LI, Youyi , SU, Bin , YANG, Ying , EINARSSON, Torbjorn , GAJIC, Zoran
IPC分类号： H02H7/26
CPC分类号： H03L7/08 , H02H3/283 , H02H3/30 , H02H7/263 , H04J3/0667
摘要： The present invention provides a synchronization method for current differential protection comprises the following steps: selecting a point on the transmission line protected by the current differential protection; measuring the current and the voltage of each of the terminals of said transmission line; calculating the compensating voltage at the selected point respectively according to the measured current and the voltage of the each terminal; detecting and calculating the synchronization error by comparing all the compensating voltages. The current and voltage of each of the terminals are measured before a fault or after a fault, and can be measured in vectors or sampling values. The current and voltage of each of the terminals are phase quantities or sequence quantities. The point can be selected from any points of transmission line; preferably the middle or the ends of the transmission line or the T connected point of the multi-terminal transmission lines. The synchronization method further comprises a step of distinguishing the calculated synchronization error caused by a serious line parameter change or an asymmetrical channel switching by calculating the changing speed of the phase angle difference or the wave shift of said compensating voltage.
摘要翻译：本发明提供一种用于电流差动保护的同步方法，包括以下步骤：选择由电流差动保护保护的传输线路上的点; 测量所述传输线的每个端子的电流和电压; 根据测量的电流和每个端子的电压分别计算所选点处的补偿电压; 通过比较所有补偿电压来检测和计算同步误差。每个端子的电流和电压在故障之前或故障之后测量，并且可以在矢量或采样值中测量。每个端子的电流和电压是相位量或序列量。该点可以从传输线的任何点选择; 优选地，传输线的中间或端部或多端子传输线的T连接点。同步方法还包括通过计算相位角差或所述补偿电压的波移的变化速度来区分由严重线路参数变化或不对称通道切换引起的计算出的同步误差的步骤。

5. 发明申请

WO2010088788A1 METHOD FOR DETECTING NETWORK ASYMMETRICAL STATUS AND ASYMMETRICAL COMMUNICATION CHANNELS FOR POWER SYSTEM 审中-公开
标题翻译：用于检测网络非对称状态的方法和用于电力系统的非对称通信信道
公开(公告)号：WO2010088788A1
公开(公告)日：2010-08-12
申请号：PCT/CN2009/000137
申请日：2009-02-09
申请人： ABB RESEARCH LTD , LI, Youyi , SU, Bin
发明人： LI, Youyi , SU, Bin
IPC分类号： H04L12/42
CPC分类号： H04L43/0852 , H04J3/0638 , H04J3/085 , H04J2203/0042 , H04J2203/006 , H04J2203/0062 , H04L12/437
摘要： The present invention provides a new synchronization method named Multi-Node Echo Method (MNEM), which settles the problem of clock/data synchronization with asymmetrical channels. In MNEM, the echo messages are relayed among multi-node loop both by clockwise and anti-clockwise. Based on Multi-Node Echo Method, the invention further provides a method to detect symmetrical status of a communication network, a method to detect asymmetrical status of any channel in a communication network, and a method to calculate the sending and receiving delay values of any channel in a communication network, even when the channel is asymmetrical.
摘要翻译：本发明提供了一种称为多节点回波方法（MNEM）的新的同步方法，其解决了具有不对称信道的时钟/数据同步的问题。在MNEM中，回波消息在多节点循环中通过顺时针和逆时针中继。基于多节点回波方法，本发明还提供了一种检测通信网络的对称状态的方法，检测通信网络中任何信道的不对称状态的方法，以及计算任何信道的发送和接收延迟值的方法通道在通信网络中，即使通道不对称。

6. 发明申请

WO2013181809A1 METHOD FOR IDENTIFYING FAULT BY CURRENT DIFFERENTIAL PROTECTION AND DEVICE THEREOF 审中-公开
标题翻译：通过电流差分保护识别故障的方法及其装置
公开(公告)号：WO2013181809A1
公开(公告)日：2013-12-12
申请号：PCT/CN2012/076525
申请日：2012-06-06
申请人： ABB TECHNOLOGY LTD. , LI, Youyi , LIU, Kai , SU, Bin
发明人： LI, Youyi , LIU, Kai , SU, Bin
IPC分类号： H02H3/28 , H04B14/06
CPC分类号： G01R31/3278 , H02H3/28 , H02H3/283
摘要： A method for identifying the fault by current differential protection and a device thereof are provided. The method comprises: measuring the full component currents of the two terminals of a two-terminal line system and calculating the corresponding fault component current vectors; obtaining an operate value by calculating a first difference between an absolute value of the sum of the fault component current vectors and Iset1; obtaining a restrain value by multiplying a second difference with a control factor, in which the second difference is calculated between the maximum of the absolute values of the fault component currents and Iset2 or between the absolute value of the difference of said fault component currents and Iset2; and identifying a fault as an external one or internal one by comparing the operate value with the restrain value. The solutions of the present intention achieve better reliability, sensitivity and faster speed than existing products.
摘要翻译：提供了一种通过电流差动保护来识别故障的方法及其装置。该方法包括：测量两端线路系统的两端的全分量电流，并计算相应的故障分量电流矢量; 通过计算故障分量电流矢量和Iset1的和的绝对值之间的第一差来获得操作值; 通过将第二差异与控制因子相乘获得抑制值，其中在故障分量电流的绝对值和Iset2的绝对值的最大值之间或在所述故障分量电流的差异的绝对值与Iset2之间计算第二差异 ; 并通过将操作值与限制值进行比较来识别故障为外部故障或外部故障。本意图的解决方案实现了比现有产品更好的可靠性，灵敏度和更快的速度。

7. 发明申请

WO2018133061A1 METHOD AND CONTROL SYSTEM FOR FAULT DIRECTION DETECTION 审中-公开
公开(公告)号：WO2018133061A1
公开(公告)日：2018-07-26
申请号：PCT/CN2017/072045
申请日：2017-01-22
申请人： ABB SCHWEIZ AG , LIU, Kai , WANG, Jianping , LI, Youyi
发明人： LIU, Kai , WANG, Jianping , LI, Youyi
IPC分类号： G01R31/08
摘要： It provides a method for detecting fault direction of transmission line (10) of an AC power system (1) and a control system using the same. The method includes sampling current values and voltage values at one end of the transmission line (10) for a series of time points； computing instantaneous voltage values at compensated point on the transmission line (10) from the current value samples and the voltage value samples based on a time domain lumped parameter differential equation for the transmission line (10) for the series of time points； recording the current value samples and the computed instantaneous voltage values at the compensated point； computing at least one voltage fault component each using the recorded computed instantaneous voltage values for at least two of the series of time points； computing at least one current fault component each using the recorded current value samples for the at least two of the series of time points； identifying the fault direction in consideration of the at least one computed voltage fault component and the at least one computed current fault component； and generating a fault direction signal indicating the identified fault direction. Where a fault directional element is designed using the voltage fault components at the compensated point, it will work well for the AC power system (1) with strong power source.

8. 发明申请

WO2018120054A1 METHOD AND CONTROL SYSTEM FOR FAULTED PHASE DETECTION 审中-公开
公开(公告)号：WO2018120054A1
公开(公告)日：2018-07-05
申请号：PCT/CN2016/113584
申请日：2016-12-30
申请人： ABB SCHWEIZ AG , LIU, Kai , WANG, Jianping , LI, Youyi
发明人： LIU, Kai , WANG, Jianping , LI, Youyi
IPC分类号： G01R31/08 , H02H7/26
CPC分类号： G01R31/025 , G01R19/2513 , G01R31/085 , H02H3/165 , H02H3/385 , H02H7/26
摘要： Provided are a method and a control system for detecting faulted phases of transmission lines in an AC power system and a protective relay using the same. The method includes sampling electric signals at one end of the transmission lines at a series of time points; computing instantaneous voltage values of electric signals at compensated points on the transmission lines from the values of the sampled electric signals based on a time domain lumped parameter differential equation for the transmission lines for the series of time points; recording the computed instantaneous voltage values of the electric signals; computing fault component or sudden-change of the instantaneous voltage values of the electrical signals; detecting the faulted phases or fault types by comparing the calculated fault component of the instantaneous voltage values at the preset compensated points; and generating signals indicating the faulted phases or fault types.

9. 发明申请

WO2016074199A1 DC GRID PROTECTION METHOD AND SYSTEM THEREOF 审中-公开
标题翻译：直流防雷方法及其系统
公开(公告)号：WO2016074199A1
公开(公告)日：2016-05-19
申请号：PCT/CN2014/091027
申请日：2014-11-13
申请人： ABB TECHNOLOGY LTD , LIU, Kai , LI, Youyi , WANG, Jianping
发明人： LIU, Kai , LI, Youyi , WANG, Jianping
IPC分类号： H02H7/26 , G01R31/08
CPC分类号： H02H7/268 , G01R31/08 , H02H3/42 , H02H7/263 , H02H7/265
摘要： A DC grid protection method and system are provided. The method comprises the following steps: fault detecting step (501): acquiring fault component travelling wave current value △i and fault component travelling wave voltage value △u of a DC line, wherein forward direction is defined extending from the protection to the DC line; fault determining step (502): if △i and △u at fault occurring time meet following criterions, performing fault detection determination step, the criterions include: product of △i and △u being less than a forward value which is bigger than zero and is associated with a predetermined threshold; and absolute value of △i or △u meeting a sensitivity requirement which is determined by the predetermined threshold; fault direction determination step (503): determining the fault as forward fault. Said scheme can overcome the problem in the prior art and implement the pilot protection in the DC system, especially in the HVDC system.
摘要翻译：提供了直流电网保护方法和系统。该方法包括以下步骤：故障检测步骤（501）：获取直流线路的故障分量行波电流值△i和故障分量行波电压值△u，其中正向定义为从保护延伸到直流线路 ; 故障判定步骤（502）：如果故障发生时间的△i和△u符合以下标准，则执行故障检测确定步骤，其标准包括：△i和△u的乘积小于大于零的正向值，与预定阈值相关联; 并且满足由预定阈值确定的灵敏度要求的△i或△u的绝对值; 故障方向确定步骤（503）：将故障确定为前向故障。所述方案可以克服现有技术中的问题，并实现直流系统中的先导保护，特别是在直流系统中。

10. 发明申请

WO2018227466A1 METHOD FOR DETECTING FAULT IN POWER TRANSMISSION LINE AND PROTECTION SYSTEM USING THE SAME 审中-公开
公开(公告)号：WO2018227466A1
公开(公告)日：2018-12-20
申请号：PCT/CN2017/088416
申请日：2017-06-15
申请人： ABB SCHWEIZ AG , LIU, Kai , WANG, Jianping , LI, Youyi
发明人： LIU, Kai , WANG, Jianping , LI, Youyi
IPC分类号： H02H7/26
摘要： It provides a method for detecting fault in a power transmission line of a power transmission system and protection system using the same. The method includes steps of: obtaining a system parameter of the power transmission system, adjusting protection reachability of a fault detecting element based on the obtained system parameter such that the adjusted protection reachability of the fault detecting element is applicable to a predetermined protection range, identifying whether there is an internal fault occurring on the transmission line using the adjusted fault detecting element, and generating a fault detection decision signal indicating the identified fault. If the predetermined protection range is desirable for the fault detecting element, its protection reachability may be adjusted in consideration of the influence imposed by the SIR such that the reach point of the adjusted fault detecting element can be extended to approach the end of the predetermined protection range. Consequently, the influence on its accuracy by various SIR values can be taken into account and accordingly the fault detecting solution can remove substantial errors as a result thereof.

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