摘要
直流系统接地故障检测所使用的传感器按照测量方式分为:测量低频注入的交流信号及测量漏电流的直流电流信号。测量低频注入信号,由于系统存在电容,对接地故障信号的准确率影响很大;测量负载漏电流的直流电流传感器,市场还没有可拆装的在线测量方式的产品。虽然有卡钳式直流电流表,但是在分辨率、精度、量程、在线安装、在线测量等方面满足不了直流系统接地故障检测要求。
Sensor used in DC ground fault detection system according to measurement method can be divided into low frequency AC signal detecting and DC signal detecting of leakage current. It greatly affect the accuracy of the earth fault signal because of the existence of capacitance in the detecting of low frequency AC signal and it doesn＇ t have online measurement DC current sensor in the market when we want to measure load leakage current. Caliper DC ammeter can＇ t meet the requirements in DC system ground fault diction in terms of resolution, accuracy, range, on-line installation and on-line measurement.
出处
《东北电力大学学报》
2014年第3期45-47,共3页
Journal of Northeast Electric Power University
基金
吉林省科技发展计划资助项目(20050540)
吉林市科技发展计划资助项目(2013523007)
作者简介
王松楠（1982-），男，吉林省吉林市人，珠海供电公司工程师，主要研究方向：电力系统及其自动化
