500 kV变压器瓦斯继电器误动作原因分析与处理方案  

Analysis and Treatment of a Mal-operation Fault of the Gas Relay in 500 kV Transformer

作　　者：侯为林 李刚 李坤鹏 孔令杰 常东亮 方书博 陈昌山 HOU Weilin;LI Gang;LI Kunpeng;KONG Lingjie;CHANG Dongliang;FANG Shubo;CHEN Changshan(State Grid Henan Baoquan Pumped Storage Co., Ltd., Xinxiang 453636, China)

机构地区：[1]河南国网宝泉抽水蓄能有限公司,河南新乡453636

出　　处：《水电与新能源》2022年第3期45-48,共4页Hydropower and New Energy

摘　　要：基于一起抽水蓄能电站500 kV变压器复送电合闸瞬间,励磁涌流过大导致重瓦斯保护误动作事件,经对该问题的深入研究,找出故障主要原因,通过优化试验方法和选择高质量瓦斯继电器等措施,从根本上解决了合闸瞬间励磁涌流偏大问题。为后期设备选型,机组的运行、维护积累了经验。At the moment when a 500 kV transformer in a pumped storage power station is re-energized and switched on,the excessive excitation inrush current leads to a mal-operation fault of the heavy gas protection.The major causes are determined with an in-depth analysis of the fault.After the optimization tests and the adoption of high quality gas relay,the problem of excessive switch-on inrush current is successively solved.It provides useful experience for the later equipment selection,unit operation and maintenance.

关 键 词：主变压器 重瓦斯保护 跳闸 励磁涌流 直流分量 

分 类 号：TM42[电气工程—电器]