广东电力2017，Vol.30Issue(10)：126-131,6.DOI:10.3969/j.issn.1007-290X.2017.010.023
10kV配电线路高阻接地检测技术
Detection Technology for High Resistance Grounding of 10 kV Power Distribution Lines
摘要
Abstract
It is simple and reliable to adopt zero-sequence protection to clear off grounding fault for power distribution lines of 10 kV small resistance grounding system,but there is a problem of insufficient sensitivity to high resistance grounding fault which is hard to be detected. Therefore,on the basis of analyzing features of high resistance grounding fault of power distribution lines,this paper compares main electric transient state and steady state quantities during the fault period. It pro-poses to develop a protection algorithm based on steady state fundamental wave to solve the problem of high resistance grounding detection for the small resistance grounding system,and it also considers the actual key point of this algorithm is reliability which means to solve problems of influence of open triangle voltage,precision of zero-sequence current,load cur-rent,and so on. The initial analysis result indicates that this algorithm can solve the problem of grounding detection for the high resistance less than 900 Ω.关键词
配电线路/小电阻接地/高阻接地/检测/稳态量Key words
power distribution line/small resistance grounding/high resistance grounding/detection/steady state quantity分类
信息技术与安全科学引用本文复制引用
蔡燕春,董凯达,张少凡,秦绮蒨..10kV配电线路高阻接地检测技术[J].广东电力,2017,30(10):126-131,6.基金项目
广州供电局有限公司科技项目(GZHKJ00000020) （GZHKJ00000020）
