浅谈发电机转子接地保护  

Brief discussion on generator rotor grounding protection

作　　者：冯骏 张岩山 徐翔 FENG Jun;ZHANG Yanshan;XU Xiang

机构地区：[1]国家能源集团泰州发电有限公司

出　　处：《电力科技与环保》2019年第5期61-62,共2页Electric Power Technology and Environmental Protection

摘　　要：系统介绍了某电厂发电机转子保护发展过程。保护装置从采用惠斯通电桥式到方波注入式,日常使用中两种类型保护均发生过转子接地保护误报警。并详细分析了一起故障,讲解了转子接地保护误报警发生的原因及后续采用零起升压的验证手段,建议对相关励磁母线进行浇筑母线改造,通过这种方法彻底优化发电机转子回路的绝缘状况。It introduced the development of generator rotor protection in a power plant,the protection device firstly based on principles of Wheatstone bridge and then developed to square wave power injection principles.In daily usage,these two type protections have all falsely sending warning signals.This paper analyzed a fault in detail,explained the reason of the rotor grounding warning signal and how to use zero-raising voltage as a proving method.Furthermore,this paper suggested to reform the related excitation bus into full insulated casting bus.In this way,we can optimize the isolation condition of generator rotor thoroughly.

关 键 词：发电机转子接地保护 方波注入式 零起升压 浇注母线 

分 类 号：TM621[电气工程—电力系统及自动化]