6～35 kV小电阻接地系统接地设备选择  

Grounding Equipment Selection of 6 ～ 35 kV Small Resistance Grounding System

作　　者：张玮 盛和乐 谢敏 ZHANG Wei SHENG He-le XIE Min(North China Power Engineering Co.,Ltd., Beijing 100120, China)

机构地区：[1]中国电力工程顾问集团华北电力设计院有限公司,北京100120

出　　处：《电力勘测设计》2017年第5期71-76,共6页Electric Power Survey & Design

摘　　要：为了确定中压小电阻接地系统接地电阻及其配套设备的选择方法,本文总结归纳了常用6~35 k V小电阻接地系统的现状,通过对现行规程要求分析,并进一步剖析了中性点接地过电压的危害及小电阻接地保护系统的工作原理,总结归纳了小电阻接地系统中接地电阻阻值的合理选择范围,及其配套电流互感器等保护设备选型,对中压系统小电阻接地设备的计算选型工作有较实用的指导意义。In order to determine the medium voltage low resistance grounding system resistance and its ancillary equipment selection method, this paper summarizes the commonly used in the 6 -35 kV low resistance status of the grounding system, by analyzing the requirement of current rules, and it further analyzes the harm of over voltage of neutral point grounding and working principle of small resistance grounding protection system, sums up the small resistance grounding system connected to resistance the reasonable selection range of and supporting current transformer and protection equipment selection, there are more practical significance about equipment selection and calculation work of small resistance of medium voltage system.

关 键 词：中性点 电阻接地系统 过电压 电容电流 继电保护 

分 类 号：TM61[电气工程—电力系统及自动化]