蒲石河抽水蓄能电站发变组继电保护的设计及特点

Design of Generator-transformer Unit Relay Protection and Its Characteristics in Pushihe Pump-storage Power Station

介绍了蒲石河抽水蓄能电站发变组继电保护的配置及设计情况。发变组继电保护具有双重化配置、高可靠性软件切换、保护不依赖监控而独立运行等特点。针对现场调试过程中出现的问题,优化了背靠背起动过程断路器跳闸方案,重新选择了转子一点接地保护装置,分析了定子接地保护的正确动作,增加了控保屏下的铜带接地。现场调试的经验可供其他抽水蓄能电站借鉴参考。

The configuration and design of generator-transformer unit relay protection in Pushihe Pump-storage Power Station is introduced herein. The relay protection has characteristics of two sets of protection system stand-by to each other, more reliable software switching, and independent operation without relying on monitoring system. For solving the problems discovered in the commissioning tests, the breaker tripping scheme during back-to-back starting process is optimized, the rotor one-point grounding protection equipment is re-selected, the fight operation of stator grounding protection is analysed, and the copper grounding to unit control and protection board is also added. The experiences of commissioning tests can be as references to other pumped-storage power stations.