一种变电站直流系统绝缘选线试验装置的研究与设计  

Research and design of a test device for insulation selection of DC system in the transformer substation

作　　者：毛焱 冯灿成 Mao Yan;Feng Cancheng(Zhongshan Power Supply Bureau of Guangdong Power Grid Company,Zhongshan,Guangdong 528400)

机构地区：[1]广东电网有限责任公司中山供电局,广东中山528400

出　　处：《电气技术》2018年第11期88-90,共3页Electrical Engineering

摘　　要：直流系统是变电站安全运行的重要组成部分。变电站直流系统绝缘选线试验是直流定检工作中的重要一环,可在直流负载支路绝缘降低时,有效检验直流系统中安装的绝缘监测装置能否准确发出绝缘降低支路选线告警。本文通过设计简易合理的控制电路,利用转换开关实现接地母线选择,并通过接地电阻调节及漏电流传感器线夹设计,提高变电站直流系统绝缘选线试验效率,降低试验过程误碰直流母线的风险,达到提高人机功效的最终目的。DC system is an important part of the safe operation of substation.The insulation selection test of dc system in transformer substation is an important part of the dc test,which can effectively verify that the insulation monitoring device installed in the dc system can alarm the reduced insulation dc load branch accurately when the insulation of the dc load branch is reduced.By designing simple and reasonable control circuit,ground busbar selection is realized by using change-over switch,and by grounding resistance adjustment and leakage current sensor wire clamp design,it is possible to improve the efficiency of transformer substation dc system insulation line selection test,reduce the risk of mistakenly touching the dc bus during the test,and achieve the ultimate goal of man-machine efficacy.

关 键 词：转换开关 线夹 高效 

分 类 号：TM63[电气工程—电力系统及自动化]