一种测量直流系统绝缘的新方法  

A new method of DC system insulation test

作　　者：詹田友[1] 刘波[1] 

机构地区：[1]湛江发电厂,广东湛江524099

出　　处：《广东电力》2003年第3期31-32,65,共3页Guangdong Electric Power

摘　　要：提出一种仅用万用表和标准电阻就可以准确测量出直流母线和支路负荷正对地电阻、负对地电阻的新测量方法,这种方法能准确查找绝缘低故障支路;能定期检测直流系统对地绝缘,防止直流系统一点接地时继电器误动,提高发电厂、变电站的的直流系统可靠性。This paper describes a new method by which the positive,negative resistance to ground of DC bus and branch could be tested precisely by mere use of universal instruments and standard resistors.The method can accurately locate branch with lowresistance fault,and can regularly test the ground insulation of DC system to prevent relay misoperation caused by system onepoint grounding,thus enhancing the DC system reliability in power plants and substations.

关 键 词：直流系统 绝缘测量 万用表 标准电阻 电厂 

分 类 号：TM621.7[电气工程—电力系统及自动化] TM934.3