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

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

特高压变电站隔离刀闸二次回路若干问题分析及改进

来源:电工电气发布时间:2020-10-23 16:23 浏览次数:601
特高压变电站隔离刀闸二次回路若干问题分析及改进
 
刘涛,裴东良,杨征,王卓,田蕊
(国网河南省电力公司检修公司,河南 郑州 450051)
 
    摘 要:针对超(特)高压变电站和换流站隔离、接地刀闸设备暴露出的问题及缺陷,总结了刀闸二次回路若干问题并提出改进措施。为防止电机电流串入控制回路而烧损元器件,刀闸控制回路宜与电机回路电源独立;气体封闭绝缘组合电器(GIS)间隔整流器出口宜设置平衡电阻桥接地,以便于维护检修工作;刀闸辅助接点不宜闭锁断路器合闸,以确保断路器合闸控制回路的可靠性;针对长期带电的电子式热继电器易烧损,接有长电缆的刀闸电机接触器易发生误动事故,提出了电源接线等改进方案;指出测控装置出口继电器接点性质应与控制回路电源性质一致,并针对GIS间隔温湿度控制器与加热器分散布置的缺点给出改进意见。为刀闸设备的生产制造、系统设计和现场运维检修工作提供了参考。
    关键词:超(特)高压变电站;隔离刀闸;接地刀闸;控制回路;平衡电阻桥;电子式热继电器
    中图分类号:TM564;TM63     文献标识码:B     文章编号:1007-3175(2020)10-0032-07
 
Analysis and Improvement on Problems in Secondary Circuit of Disconnector in UHV Substations
 
LIU Tao, PEI Dong-liang, YANG Zheng, WANG Zhuo, TIAN Rui
(Maintenance Company of Henan Electric Power Corporation, Zhengzhou 450051, China)
 
    Abstract: For the problems of disconnector and earthing switches in EHV (UHV) substation and converter station, this paper summarizes some problems in the secondary circuit of switches and puts forward improvement measures. In order to prevent the motor current flow in series to the control circuit and burn the components, the switches control circuit and motor circuit should be seperately power supplied. The earthing balance resistance bridge should be installed at the outlet of GIS unit’s rectifier to facilitate maintenance and repair work. To ensure the reliability of circuit breaker closing control circuit, the auxiliary contact of switches should not block the closing operation of circuit breaker. For the long-term electrified electronic thermal relay is frequently burnt, and the switches motor contactor connected with long cable is easy to wrong operation, the power wiring and other improvement schemes are proposed. The nature of outlet relay contacts should be consistent with that of control circuit power supply. Disadvantage and suggestion of decentralized arrangement of GIS unit’s temperature & humidity controller and its heater is put forward. It provides a reference for the manufacture, system design and on-site operation and maintenance of switchgear.
    Key words: EHV(UHV) substation; disconnector; earthing switch; control circuit; balanced resistance bridge; electronic thermal relay
 
参考文献
[1] 张书琴,张克选,高延峰,等. GIS现场验收及运行中若干问题的研究[J]. 高压电器,2017,53(5):193-199.
[2] 刘涛,裴东良,徐瑞娜,等.1 000 kV HGIS隔离/ 接地刀闸控制触点频繁烧损事故分析及改进[J]. 华北电力技术,2017(5):60-65.
[3] 刘涛,李凤旭,杨光,等. 直流不接地系统临时接地装置在特高压南阳变电站的应用[J]. 电气应用,2015,34(1):116-119.
[4] 李茹勤,刘涛,张高峰,等. 整流器出口设置平衡电阻桥接地方案的研究[J]. 东北电力技术,2018,39(7):18-21.
[5] 李炜,刘明光,田浩,等. 隔离开关传动机构的误差分析与研究[J]. 高压电器,2018,54(3):32-36.
[6] 刘涛,王贵山,黄健金,等.500 kV断路器合闸回路故障引起的保护误动事故分析[J]. 陕西电力,2014,42(6):77-80.
[7] 梁方建,吴建辉,胡路东,等. 一起220 kV隔离开关电机开关误分事故分析[J]. 高压电器,2018,54(1):249-251.
[8] 雷兴,潘学萍,孙彬,等. 电缆分布电容对出口继电器动作的影响分析及应对措施[J]. 电力系统自动化,2017,41(15):170-175.
[9] 冯顺, 曲欣, 王毅, 等. 一起刀开关误动作引起500 kV线路跳闸的分析[J]. 电气应用,2018,37(9):54-57.
[10] 孟恒信. 出口继电器安全动作功率分析[J]. 电力系统自动化,2009,33(6):104-107.
[11] 刘若溪,白宝军,郭沁,等. 开关柜凝露现象机理分析研究[J]. 高压电器,2018,54(10):80-84.