发电机励磁系统滑环短路故障引发停机事故分析  

Analysis of a Unit Shutdown Accident caused by Short Circuit of the Slip Ring in Generator Excitation System

作　　者：刘灏 LIU Hao(CHN Energy Dadu River Pubugou Hydropower Plant,Ya’an 625304,China)

机构地区：[1]国能大渡河瀑布沟水力发电总厂,四川雅安625304

出　　处：《水电与新能源》2022年第8期71-75,共5页Hydropower and New Energy

摘　　要：结合某水电站一起发电机励磁系统转子滑环短路导致的发电机事故停机事件,通过故障排查及励磁系统继电保护配置、定值整定及故障波形记录展开全面分析,原因是现有励磁系统继电保护配置无法实现励磁系统直流侧主回路短路故障快速反应并切除。经相应的技术改进,提升励磁系统继电保护的速动性,避免类似事件发生。A generator emergency shutdown accident caused by short circuit of the rotor slip ring in excitation system in a hydropower station is analyzed.Based on the comprehensive analysis of the relay protection configuration,setting value calculation and fault wave record of the excitation system,it is found that the relay protection configuration of the current excitation system cannot realize the quick response and removal of the short circuit fault of the main circuit at the DC side.Technical renovation measures are then proposed to improve the quick response ability of the relay protection to avoid the occurrence of similar accidents.

关 键 词：励磁系统 转子滑环 短路故障 继电保护 快速性 

分 类 号：TM33[电气工程—电机]