宝安换流站极控COL故障跳闸分析及改进方案

刘高峰; 陈勇

引用本文:	刘高峰,陈勇.宝安换流站极控COL故障跳闸分析及改进方案[J].电力系统保护与控制,2016,44(2):151-154.
	LIU Gaofeng,CHEN Yong.Analysis of trip for COL fault of pole control and the improved scheme in Baoan converter station[J].Power System Protection and Control,2016,44(2):151-154

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宝安换流站极控COL故障跳闸分析及改进方案
刘高峰¹, 陈勇²
1.许继电气股份有限公司，河南许昌 461000;2.许昌开普电气研究院，河南许昌 461000

摘要:

根据宝安换流站的一次冗余极控系统的COL故障引起的跳闸事件，通过现场实际情况的描述和对受损模块PCB板的详细观察和分析，找到了导致故障的原因所在——电容击穿而产生的非极低阻性短路导致的模块被烧毁。并根据现场电气接线提出了COL安装接线和COL电源回路改进方案。新方案可很好地避免由前述类似单元器件故障引起的系统跳闸，极大地提高了系统的可靠性和稳定性。

关键词: 极控系统冗余 COL 跳闸电容击穿电源回路

DOI：10.7667/j.issn.1674-3415.2016.02.022

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基金项目:

Analysis of trip for COL fault of pole control and the improved scheme in Baoan converter station

LIU Gaofeng¹, CHEN Yong²

1.XJ Electric Co., Ltd., Xuchang 461000, China;2.Xuchang KETOP Electrical Research Institute, Xuchang 461000, China

Abstract:

According to a trip event of redundant pole control system in Baoan converter station, based on onsite description and observation and analysis for spoiled COL module, we found out that a capacitor breakdown led to the COL fault. The capacitor breakdown produced a nonlinear and low resistance short circuit. This translated into that COL was burned down. An improved scheme is given for COL installation and power supply circuit in pole control cubicle. The improved scheme can avoid trip caused by COL fault, and greatly improve the reliability and stability of pole control system.

Key words: pole control system redundant COL trip capacitor breakdown power supply circuit

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