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    • 1. 发明申请
    • METHOD FOR IDENTIFYING FAULT BY CURRENT DIFFERENTIAL PROTECTION AND DEVICE THEREOF
    • 通过电流差分保护识别故障的方法及其装置
    • WO2013181809A1
    • 2013-12-12
    • PCT/CN2012/076525
    • 2012-06-06
    • ABB TECHNOLOGY LTD.LI, YouyiLIU, KaiSU, Bin
    • LI, YouyiLIU, KaiSU, Bin
    • H02H3/28H04B14/06
    • G01R31/3278H02H3/28H02H3/283
    • 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.
    • 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。
    • 4. 发明申请
    • METHOD FOR IDENTIFYING FAULT DIRECTION WITHOUT VOLTAGE MEASUREMENT INFORMATION AND DIRECTIONAL ELEMENT THEREOF
    • 无电压测量信息识别故障方向的方法及其方向元件
    • WO2013106985A1
    • 2013-07-25
    • PCT/CN2012/070424
    • 2012-01-16
    • ABB RESEARCH LTD.LI, YouyiSU, Bin
    • LI, YouyiSU, Bin
    • G01R31/08H02H3/38
    • H02H7/28G01R31/086H02H3/302H02H7/261
    • 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.
    • 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。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR DETECTING COMMUNICATION CHANNEL DELAY ASYMMETRY
    • 用于检测通信信道延迟不对称的方法和装置
    • WO2011079460A1
    • 2011-07-07
    • PCT/CN2009/076347
    • 2009-12-31
    • ABB RESEARCH LTD.SU, BinLI, YouyiEINARSSON, Torbjorn
    • SU, BinLI, YouyiEINARSSON, Torbjorn
    • H04L7/00
    • H04J3/0682H02H1/0061H02H3/30H04J3/065H04J3/0658
    • 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.
    • 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。
    • 6. 发明申请
    • SYNCHRONIZATION METHOD FOR CURRENT DIFFERENTIAL PROTECTION
    • 电流差动保护同步方法
    • WO2012061978A1
    • 2012-05-18
    • PCT/CN2010/078562
    • 2010-11-09
    • ABB RESEARCH LTD.LI, YouyiSU, BinYANG, YingEINARSSON, TorbjornGAJIC, Zoran
    • LI, YouyiSU, BinYANG, YingEINARSSON, TorbjornGAJIC, Zoran
    • H02H7/26
    • H03L7/08H02H3/283H02H3/30H02H7/263H04J3/0667
    • 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.
    • 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。