基于单相接地故障的配电网馈电线路电容电流测算方法  

Measurement method of capacitive current in supply line of distribution network based on single-phase to ground fault

作　　者：周永其 陈挥瀚 常勇[3] 王莹[3] 杨洪灿 孙建华 ZHOU Yongqi;CHEN Huihan;CHANG Yong;WANG Ying;YANG Hongcan;SUN Jianhua(Yunnan Power Grid Co.Ltd Qujing Power Supply Bureau,Qujing,Yunnan 655000,China;Kunming Tonghong Ruineng Electric Power Technology Co.Ltd,Kunming 650000,China;Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]云南电网有限责任公司曲靖供电局,云南曲靖655000 [2]昆明同弘瑞能电力科技有限公司,昆明650000 [3]昆明理工大学,昆明650500

出　　处：《云南电力技术》2018年第3期73-74,共2页Yunnan Electric Power

摘　　要：介绍随着城市配电网的规模不断扩大,电缆线路大面积的应用,配电网线路的电容电流日益增大,电容电流的大小决定消弧线圈调控,对电网的规划设计和运行安全有重要影响。本文研究了配电网发生单相接地故障时线路零序电流和电容电流之间的关系,基于单相接地故障时馈电分支线路的零序电流测量值,提出一种线路电容电流的测算方法。With the development of electric power industry, the city distribution network continues to expand. The application of cable lines is more and more extensive. The capacitive current of distribution network increases day by day.The capacitive current has an important influence on the planning and operation of network security and decides the size of the arc suppression coil control. In this paper, the relation between zero sequence current and capacitive current of single-phase to ground fault in distribution network is studied. Based on the measured value of zero sequence current of supply branch line under single-phase grounding fault, a method for measuring the capacitive current of line is proposed.

关 键 词：配电网 单相接地故障 零序电流 电容电流 

分 类 号：TM74[电气工程—电力系统及自动化]