电力系统中非对称接地和断线故障分析  

Analysis of Asymmetrical Grounding and Line Breaking Faults in Power System

作　　者：蔡蕾 王丙东[2] 王冬梅 CAI Lei;WANG Bingdong;WANG Dongmei(State Grid Tianjin Electric Power Company Wuqing Branch,Tianjin Wuqing 301700,China;State Grid Hebei Langfang Power Supply Company,Hebei Langfang 065000,China;Baoding Technical College of Electric Power,Hebei Baoding 071000,China)

机构地区：[1]国网天津市电力公司武清分公司,天津武清301700 [2]国网河北廊坊供电公司,河北廊坊065000 [3]保定电力职业技术学院,河北保定071000

出　　处：《农村电气化》2024年第4期43-48,共6页Rural Electrification

摘　　要：将对称分量法应用到中性点不接地电网非对称故障分析中,用于计算电网各位置的故障后电流和电压,并首次应用零序序网图解释中性点偏移的物理含义。然后本文系统介绍了中性点接地和不接地电网非对称故障中负序和零序分量的分布问题,最后对接地短路和断线故障进行了对比分析。First of all,the symmetric component method is applied to the asymmetric faults research in neutral ungrounded grid to calculate the after-fault current and voltage,and the physical meaning of neutral point deviation is clearly explained by using zero sequence network.Then,the distribution of negative sequence and zero sequence components in unsymmetrical faults of neutral earthed and ungrounded networks is systematically introduced,and the ground short circuit and disconnection faults are carefully analyzed in comparison.

关 键 词：非对称故障 接地 断线 中性点偏移 

分 类 号：TM711[电气工程—电力系统及自动化]