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    • 13. 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。