Abstract：Research purpose: According to many statistic of electric power faults, upwards of 80 percent are single phase grounding fault among all faults. In order to locate and isolate the fault rapidly, improve the reliability of railway power supply line.
Research method: This article analyzed the distributing of zero sequence current when single phase grounding fault occurred along the circuitry. A fault location method based on General Matrix Arithmetic is proposed for railway power supply line, and the method is validated.
Research result: The method composes a distributed system made up by STU, FTU and supervise terminal. Abandoned the previous method, which locates faults by examining the zero sequence voltage and comparing the zero sequence current of each line in the electrical power station, use the zero sequence current of each switchgear spot only.
Research conclusion: In condition of laboratory, the new method can locate and isolate faults within 10 seconds, it can provide reliable gist for fault lookup and elimination.
魏天魁，王章启，沈祥裕，刘春. 铁路贯通/自闭线单相接地故障段定位方法[J]. 铁道工程学报, 2006, 23(1): 79-81.
WEI Tian-kui, WANG Zhang-qi, SHEN Xiang-yu, LIU Chun. METHOD OF SINGLE PHASE GROUNDING FAULT LOCATION FOR RAILWAY POWER SUPPLY LINE. 铁道工程学报, 2006, 23(1): 79-81.
2006, Vol. 23 
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