接地系统零序电流互感器的应用误区  

A Study on the Mistakes in the Application of the Zero Sequence Current Mutual Inductor of the Earthing System

作　　者：赵歆 罗彬[1] ZHAO Xin;LUO Bin(Chongqing Luohuang Power Generation Co.,Ltd.of CHNG,Chongqing 402283,P.R.China)

机构地区：[1]华能重庆珞璜发电有限责任公司

出　　处：《重庆电力高等专科学校学报》2019年第6期5-7,共3页Journal of Chongqing Electric Power College

摘　　要：针对厂用6 kV中压经小电阻接地系统,通过分析接地故障电流,以及接线方式不同时电路原理,指出串联接线的错误接线方式及其造成的后果。同时提出当同一负荷采用多根动力电缆并联接线,且采用多个零序电流互感器穿过不同的一次动力电缆来实现零序接地保护时应注意的要点。Based on the 6kV medium-voltage low-resistance earthing system,by analyzing the current of the earthing faults as well as circuit theories in correspondence with different modes of wiring,this paper points out wrong ways of series wiring and relevant consequences.In addition,it puts forward points for attention when several power cables are used for parallel wiring for one load and when the zero sequence ground protection is realized by passing several zero sequence current mutual inductors through different primary power cables.

关 键 词：综合保护装置 零序电流互感器 保护越级 

分 类 号：TM452[电气工程—电器]