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《Automation of Electric Power Systems》 2002-10
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THE UNIFORM FORMULA OF EARTH FAULT DISTANCE RELAY WITH SINGLE-PHASE COMPENSATION

Li Yan,Zhan Yi,Chen Deshu,Yin Xianggen Huazhong U niversity of Science and Technology,Wuhan 4 30 0 74 ,China  
The single- phase earth fault is the most comm on fault for high voltage transm ission line. In order to improve the sensitivity of ground distance relays for the single- phase fault,and to simplify the formulation of conventional relays,one uniform formula is suggested to express all the ground distance relays with one phase polarization through the analysis of the polarization of different relays.More than ten kinds of relays in wide use can be expressed in the uniform form ula just by changing the factors. The uniform formula is helpful to analyze the performance of these relays and to create new high perform ance relays with flexibility in actual use. Furtherm ore,two new relays based on the uniform formula are also proposed. Sim ulations show that these new relays have better performance than those old ones. At last,the basic fundam ental about the choice of polarization is discussed.新型偏磁式消弧线圈及其控制
【CateGory Index】: TM588
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