某大型水电站定子接地保护3U_(0)+3W跳闸原因分析及防范措施  

Reason Analysis and Preventive Measures for 3U_(0)+3W Tripping of Stator Grounding Protection in a Large Hydropower Station

作　　者：杨代翠 李超 YANG Daicui;LI Chao(Dadu River Hydropower Development Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]国能大渡河流域水电开发有限公司,四川成都610041

出　　处：《通信电源技术》2023年第21期223-225,共3页Telecom Power Technology

摘　　要：发电机定子接地保护动作导致的甩负荷,不仅会影响系统供电,还会造成机组过速,损害机组转动部件、机械拐臂、固定支撑机构等。文章基于某大型水电站6F机组一次定子接地保护动作事故处理案例,重点介绍事故发生时的故障现象、检查过程的原因分析及防范措施,从而降低类似故障导致定子接地保护动作的概率,对于电厂设备的安全可靠运行有十分重要的意义。Load shedding caused by generator stator grounding protection action will not only affect the system power supply,but also cause the unit to overspeed,damaging the unit’s rotating parts,mechanical crutch arms,and fixed support mechanisms.The article is based on a large hydroelectric power station 6F unit of a stator grounding protection action accident processing case,focusing on the occurrence of accidents when the fault phenomenon,the cause of the inspection process analysis and precautionary measures,so as to reduce the probability of similar faults lead to stator grounding protection action,for the safe and reliable operation of power plant equipment has a very important significance.

关 键 词：定子接地保护 零序电压 一次保险 故障录波 

分 类 号：TV738[水利工程—水利水电工程]