Novel method of fault line selection for non-direct earth neutral system based on two-phase-current transformation

被引：0
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作者：
Tianjin University, Tianjin 300072, China [1 ]
机构：
来源：
Dianli Xitong Zidonghue | 2007年 / 8卷 / 75-79期
关键词：
Computer simulation - Mathematical transformations;
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摘要：
A novel method of identifying fault line for single phase-to-earth fault in non-direct earth neutral system based on two-phase-current transformation (TPCT) is presented. TPCT is an algorithm that the currents of phase-a, -b and -c of each line add their leading current of phase-b, -c and -a that is turned 60 degree clockwise, respectively. The criterion of faulted-line identification is that the three-phase currents by TPCT of healthy line are equal while the three-phase currents by TPCT of faulted line are different, which has been proved theoretically. Computer simulation shows that the method of the proposed fault-line identification is not affected by fault resistance and load flow and can identify fault line correctly when a single phase to earth fault occurs in non-direct earth neutral system.
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页码：75 / 79
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