广东电力Issue(8)：56-59,4.DOI:10.3969/j.issn.1007-290X.2014.08.013
一起220 kV线路发展性故障引起母线解列的事件分析
An Event Analysis on Busbar Disconnection Caused by Developmental Fault of One 220 kV Line
邱少远1
作者信息
- 1. 湛江电力有限公司，广东 湛江524099
- 折叠
摘要
Abstract
One 220 kV line grounding fault in some power plant was analyzed. According to protection action of recorded high frequency distance and distanceⅠsection of A line and No. 5 busbar differential protection of 220 kV,wave record fig-ures of line protection action and busbar differential protection action were analyzed and L3 phase grounding fault was ini-tially judged. Meanwhile,developmental fault was judged in aspect of its development trend. For confirming fault point po-sition,No. 5 busbar,insulation of A line gap and equipments on the line were examined and dynamic arc contact of the breaker was found broken. In addition,there was sand hole and oil stains on bottom crater of the bumper oil cylinder (shell).Therefore,reason for transform of external fault into internal fault was analyzed and main factors for the fault were discovered that included sand hole on bottom crater of the bumper oil cylinder,transformer oil oozing and volatilizing from the sand hole and gradually reduction of oil which might result in decreasing buffering. Suggestions of strengthening daily maintenance for 220 kV gas insulated metal enclosed switchgear and monitoring on transformer oil level or leakage were proposed.关键词
接地故障/区内故障/发展性故障/录波图/母线解列Key words
grounding fault/internal fault/developmental fault/wave record figure/busbar disconnection分类
信息技术与安全科学引用本文复制引用
邱少远..一起220 kV线路发展性故障引起母线解列的事件分析[J].广东电力,2014,(8):56-59,4.
