抽水蓄能电站主变低压侧零序电压保护误动处理与分析  

Analysis and Treatment of a Zero Sequence Voltage Protection Mal-operation in Low Voltage Side of Main Transformer in Baoquan Pumped Storage Power Station

作　　者：方书博 娄彦芳 刘鹏龙 陈旭东 陈昌山 FANG Shubo;LOU Yanfang;LIU Penglong;CHEN Xudong;CHEN Changshan(Henan State Grid Baoquan Pumped Storage Power Statio)

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》2018年第6期44-47,77,共5页Hydropower and New Energy

摘　　要：宝泉抽水蓄能电站因电压互感器一次侧熔断器故障导致继电保护误动,通过原因分析研判与处理表明,抽水蓄能电站一次接线复杂,运行工况繁多且转换频繁,需要管理人员对保护配置、动作逻辑等多方面进行深入研究,针对不同故障和异常情况配置不同的保护,同时完善CT、PT断线闭锁功能,防止继电保护拒动、误动,确保电网、机组安全稳定运行。In Baoquan Pumped Storage Power Station,a relay protection mal-operation induced by the fuse fault occurred in the primary side of the potential transformer is observed. The reasons of this fault is analyzed and corresponding treatment measures are proposed. It shows that the primary side wiring is complex and also of complicated working conditions and frequent conversions. Thus,the protection configuration and logic should be studied intensively. Different protections should be prepared for different faults and abnormal situations. In addition,the disconnection and locking functions for the current transformer and potential transformer should be improved to prevent the relay protection mal-operation. Therefore,the safe and stable operation of the power grid and generator units could be ensured.

关 键 词：主变低压侧零序电压保护 PT 一次侧断线 逻辑 

分 类 号：TV743[水利工程—水利水电工程]