基于零序补偿系数变化的同塔四回输电线路接地距离保护研究  

Research on Grounding Distance Protection of Four-circuit Transmission Lines on the Same Tower Based on Variation of Zero Sequence Compensation Coefficient

作　　者：邵昱[1] 拜姝羽 王超 李丰克 SHAO Yu;BAI Shuyu;WANG Chao;LI Fengke(Zhengzhou Power Supply Company,Zhengzhou Henan 450000)

机构地区：[1]国网郑州供电公司

出　　处：《河南科技》2019年第16期140-142,共3页Henan Science and Technology

摘　　要：对于同塔架设的包含有不同电压等级的四回线路,线路间的电磁联系愈加紧密,线路间的零序互感对保护的影响也不容忽视。零序电流补偿系数不仅与本线路的正序、零序阻抗有关,还与线路间的零序互感以及相邻互感线路的参数和运行方式有关。本文主要研究同塔架设包含有不同电压等级的四回线路之间的零序互感对接地距离保护的影响,对整定零序电流补偿系数、提高电网的保护动作性能具有重要的意义。For the four-circuit line with different voltage levels set up in the same tower,the electromagnetic connec?tion between the lines is more and more tight,and the influence of the zero-sequence mutual inductance between the lines on the protection can not be ignored.The zero-sequence current compensation coefficient is not only positive with the line.The sequence and zero-sequence impedance are related to the zero-sequence mutual inductance be?tween the lines and the parameters and operation modes of the adjacent mutual inductance lines.In this paper,the in?fluence of the zero-sequence mutual inductance between the four towers with different voltage levels on the ground?ing distance protection was studied.It is of great significance to adjust the zero-sequence current compensation coef?ficient and improve the protection performance of the power grid.

关 键 词：同塔多回线路 零序互感 接地距离保护 

分 类 号：TM774[电气工程—电力系统及自动化]