一起220kV变电站全站失压事故的分析及预防措施

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摘要本文分析了一起220kV变电站全站失压的事故。事故起因在于倒闸操作中母线隔离开关辅助接点切换不到位,导致电压切换回路异常,致使PT保护二次空开跳闸。同时,站内备自投装置逻辑在防PT异常失压后误动作的措施不足,导致220kV变电站全站失压。本文介绍了电压切换回路的国网规程要求,并对备自投装置逻辑进行优化,以期为220kV变电站运行维护提供参考。

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	冯顺
	焦海龙

关键词 ：失压, 电压切换, 备自投, 预防措施

Abstract：The paper analyzes an accident of the blackout in 220kV substation. The isolated switch auxiliary contact switch is not in place, resulting in voltage switching is not normal, eventually leading to the voltage air switch tripping. At the same time, the substation occurs the accident of the blackout because of the logic defects of automatic bus transfer equipment after the PT protection voltage anomaly disappeared. This paper introduces the regulation requirements of State Grid Corporation on voltage switching circuit, and puts forward the preventive measures to optimize the logic of theautomatic bus changeover device. This paper hope these measures can provide a reference for the operation and maintenance of 220kV substation.

Key words： blackout voltage switching automatic bus transfer precaution

收稿日期: 2017-07-13 出版日期: 2018-01-22

作者简介: 冯顺（1989-）,男,本科,工程师,从事电力系统继电保护维护工作。

引用本文:

冯顺, 焦海龙. 一起220kV变电站全站失压事故的分析及预防措施[J]. 电气技术, 2018, 19(1): 117-120. Feng Shun, Jiao Hailong. The resaon analysis and precautions of blackout in 220kV substation. Electrical Engineering, 2018, 19(1): 117-120.

链接本文:

http://dqjs.cesmedia.cn/CN/Y2018/V19/I1/117