小接地电流系统单相接地消弧、过压、感电、保护技术研究与应用  

Study and Application of Single Phase Earthing Arc Blow-out,Over voltage,Inductive Surge and Protection Techniques in High Impedance Earthing Network

作　　者：王洪[1] 邢静原[1] 张广辉[1] 王凤清 董超 

机构地区：[1]张家口供电公司,河北省张家口075000 [2]锦州拓新电力有限公司,辽宁锦州121000

出　　处：《华北电力技术》2013年第10期1-6,共6页North China Electric Power

摘　　要：电力系统中性点接地是一个综合性技术问题,文章从张家口地区运行情况出发,针对目前系统采用的中性点不接地或经消弧线圈接地的小电流接地系统存在的熄灭接地电弧能力低及系统发生人身感电时、间接性接地过电压时、设备内部故障接地时,无保护能力等诸多问题,在深入研究保护方法的基础上,利用先进的电子技术结合电气原理,将上述系统变为智能接地系统运行的保护方案。Power system neutral grounding is a comprehensive technical problem and from the actual regional operat- ing status, this article focuses on problems with ungrounded neutrals/small current arc suppression coil grounding system such as ineffectiveness of arc extinguishment, incompetence of protection in the event of human electrifying, indirect grounding overvoltage,internal faulty grounding etc. On the basis of exploring protection methods, this article will offer a protection plan to change above system to smart grounding system through combination of electronic tech- nology and electrical principles.

关 键 词：中性点非有效接地 消弧线圈 自动补偿装置 电容电流 过电压 故障定位 弧光接地 

分 类 号：TM77[电气工程—电力系统及自动化]