选煤厂660V供电系统的接地保护技术研究  

Research on Grounding Protection Technology of 660 V Power System at Coal Preparation Plant

作　　者：王国伟[1] 杨丽[1] 王海潮[2] 

机构地区：[1]北京华宇工程有限公司,北京100120 [2]煤炭科学研究总院,北京100013

出　　处：《煤矿机电》2012年第4期30-32,37,共4页Colliery Mechanical & Electrical Technology

摘　　要：分析了660 V三相三线制配电系统为中性点经高电阻接地系统的特性,阐述了接地电阻器阻值选取的实用方法,中性点金属接地时单相接地电容电流的计算方法及此系统漏电(零序电流)保护器的整定方法,为现场的保护整定技术提供参考依据。The features of 660 V three-phase three-line power distribution systems are neutral grounding system. The applied method of grounding resistance value choice is discussed. One is the calculation method about current of single-phase ground capacitance when the neutral metal grounded; and the other setting method is about the system leakage （zero sequence current） protector. These two methods are introduced, which provide reference for on-site protection setting technology.

关 键 词：接地系统 单相接地电容电流 接地电阻 

分 类 号：TM732[电气工程—电力系统及自动化]