电力系统保护与控制Issue(7)：44-51,8.
经过渡电阻短路接地故障的计算方法研究
Study on calculation methods of ground fault through transition resistance
摘要
Abstract
The calculation methods of ground fault through transition resistance are studied. Firstly, single-line ground fault through transition resistance is analyzed by symmetrical component method. The six-sequence component theory is used to analyze two parallel lines on the same tower when the parameters are exactly the same. Secondly, a method is presented to analyze two parallel lines of asymmetry parameter on the same tower. According to symmetrical component method, impedance matrix of the lines is decoupled to positive sequence, negative sequence and zero sequence. It comes to a conclusion that positive sequence and negative sequence have already been decoupled, but zero sequence is still coupling. Then, the coupling zero sequence is decoupled to the same directional zero component and the circumfluence zero component based on six sequence component theory in which the zero sequence is divided into the same directional component and the circumfluence component. And system impedance is modified. Finally, the new decoupling method is applied to do fault analysis and figure up the correction coefficient of transition resistance. The PSCAD results prove that the new decoupling method is correct.关键词
过渡电阻/故障分析/解耦/零序互感Key words
transition resistance/fault analysis/decouple/zero-sequence mutual inductance分类
信息技术与安全科学引用本文复制引用
许侃,范春菊,许锦喜..经过渡电阻短路接地故障的计算方法研究[J].电力系统保护与控制,2014,(7):44-51,8.基金项目
国家自然科学基金（51177066，51377104）This work is supported by National Natural Science Foundation of China (No.51177066 and No.51377104) （No.51177066 and No.51377104）
