广东电力Issue(6)：64-67,4.DOI:10.3969/j.issn.1007-290X.2014.06.014
消弧线圈并联小电阻的灵活接地方式
Flexible Grounding via Arc-suppression Coil and Low Resistance in Parallel
摘要
Abstract
Aiming at defects of grounding mode of neutral point via arc-suppression coil being not rapid and correct enough for line selection for permanent fault while unable to distinguish fault types via low resistance,this paper proposes a flexible grounding mode via arc-suppression coil and low resistance in parallel by combining advantages such as high power supply re-liability of arc-suppression coil grounding and rapid switch-off for fault of low resistance grounding.The basic idea of this grounding mode is to input arc-suppression coil at the moment of normal running and instant grounding fault occurring while to switch low resistance when permanent fault occurs in order to realize flexible transform of neutral grounding mode.This paper introduces composition and working principle of the flexible grounding device and parameter selection for low resist-ance.By two practical cases,it proves that this flexible grounding mode is able to reduce line trip rate and improve power supply reliability which is suitable for city power distribution network mixing cable lines with overhead lines.关键词
中性点接地方式/消弧线圈/小电阻/永久性故障/瞬时故障Key words
neutral grounding mode/arc-suppression coil/low resistance/permanent fault/instant fault分类
信息技术与安全科学引用本文复制引用
黄志方,魏立新,李刚..消弧线圈并联小电阻的灵活接地方式[J].广东电力,2014,(6):64-67,4.
