Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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一起35 kV站用变非电量保护跳闸事件分析

来源:电工电气发布时间:2019-07-16 14:16 浏览次数:576
一起35 kV站用变非电量保护跳闸事件分析
 
张春刚,甘龙,孙西,欧阳劲松
(云南电网有限责任公司昆明供电局,云南 昆明 650000)
 
    摘 要:某500 kV变电站内35 kV站用变由于有载调压重瓦斯继电器误动,造成保护装置动作跳闸,分别从后台机报文显示、保护装置信息记录检查、现场站用变油枕检查、油样分析、瓦斯继电器拆卸检查等方面全面分析非电量保护跳闸原因,确定本次跳闸是由于2号站用变有载调压重瓦斯真空管破裂进油,导致常开触点粘死导通引起站用变保护重瓦斯动作。提出相应预防措施,为预防类似安全隐患参考。
    关键词:站用变;非电量保护;有载调压重瓦斯;预防措施
    中图分类号:TM407;TM773     文献标识码:B     文章编号:1007-3175(2019)07-0042-04
 
A Case of Tripping Accident Analysis of 35 kV Station Transformer on Non-Electricity Protection
 
ZHANG Chun-gang, GAN Long, SUN Xi, OUYANG Jin-song
(Kunming Power Supply Bureau of Yunnan Power Grid Co., Ltd, Kunming 650000, China)
 
    Abstract: On account of an accident of tripping-out of protective device operation caused by misoperation of gas relay with on-load voltage regulating in a 500 kV substation, this paper comprehensively analyzed the tripping reasons of non electric quantity protection from the aspects of message display of background machine, information record and inspection of protective device, inspection of oil pillow for site substation, oil sample analysis and disassembly inspection of gas relay etc, to make sure that this tripping was caused by gas relay vacuum tube fracture and oil-taking with on-load voltage regulating in No.2 station transformer, leading to normally open contact sticking to make the gas relay action. The corresponding precautionary measures are proposed to provide references for preventing the analogy potential safety hazard.
    Key words: station transformer; non electric quantity protection; on load tap changing heavy gas; preventive measures
 
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