某500kV变电站直流接地叠加多点窜电故障分析  

Analysis of direct current grounding superimposed multi-point power channeling fault in a 500kV substation

作　　者：王彬 王莉 李小春 王雷 张孝顺 WANG Bin;WANG Li;LI Xiaochun;WANG Lei;ZHANG Xiaoshun(State Grid He’nan Extra High Voltage Company,Zhengzhou 450001)

机构地区：[1]国网河南电力公司超高压公司,郑州450001

出　　处：《电气技术》2024年第8期81-84,共4页Electrical Engineering

摘　　要：针对某500kV变电站直流接地叠加多点窜电典型故障,阐述直流系统多重复杂故障查找过程。根据系统拓扑结构和绝缘监测原理,利用等效电路法和回路电流法对异极窜电进行建模分析,为直流系统缺陷分析提供理论参考。通过归纳直流系统接地、窜电隐患点的典型特征,为直流系统故障分析及运维检修提供支撑。Aiming at the typical faults of DC grounding superimposed multi-point power channeling in a 500kV substation,the troubleshooting process of multiple complex faults is introduced in this paper.According to the DC system topology and the principle of insulation monitoring device,the equivalent circuit method and loop current method are used for the modeling and analysis of heteropolar channeling fault in this paper,which provides a theoretical reference for the defect analysis of DC system.In addition,the typical characteristics of hidden points of grounding and power channeling of DC system are summarized to provide support for DC system fault analysis and operation inspection.

关 键 词：直流接地 异极窜电 绝缘监测 回路电流法 

分 类 号：TM63[电气工程—电力系统及自动化] TM862