三峡右岸电站发电机变压器保护分析及改进

Analysis and improvement of generator-transformer protection of Three Gorges Right Bank Hydropower Station

三峡右岸电站共装12台水轮发电机和12台主变压器,发电机、变压器为发-变组单元接线,每个发-变单元配有独立的微机发变组保护装置,它有完全独立的双套主保护、双套后备保护和非电量保护。三峡右岸电站发电机变压器保护在总结了三峡左岸电站和其他兄弟电站的运行经验后,增加了隔离开关缺相、发电机误上电、断路器闪络、转子回路电缆异常等保护功能。在实际运行中,还针对出现的新问题,进行了一些技术改造,这使三峡右岸电站发变组保护功能更加完善。

Twelve generators and twelve transformers are installed in Three Gorges Right Bank Hydropower Station and form generator-transformer unit respectively.Each unit equips independent microcomputer protection device and dual main protection,dual back-up protection and non-electricity protection.According to the actual needs,other protection functions such as the isolating switch open phase protection,the generator mischarging protection,the breaker arc protection and the rotor loop cable anomaly protection are added and some technical improvements have finished.