一起主励磁机转子接地故障的处理与原因分析

Processing and analysis of the causes of an earth fault of main exciter rotor

介绍了外加电源注入式转子接地装置RCS-985RE的保护原理以及转子接地产生的相关危害,结合一套三机他励励磁系统的主励磁机转子一点接地故障实例,提出了故障处理相应步骤,并分析了故障发生的原因。同时指出,转子接地保护装置在特定运行方式下不能检测有关系统故障,并给出了合理的辅助测量判断手段。

This paper introduced protection principle of injection type of rotor earth-fault protection equipment generated by additional power and hazard of rotor earthing. Based on an earth fault of main exciter rotor of a set of separate excitation system,this paper proposed a process of fault handling and analyzed the cause of this fault. At the same time pointed out that the system failure cannot be detected if rotor earth-fault protection equipment is under specific operation mode. A reasonable judgment means of assistant measuring is provided.