某大型水电站机组开机过程中调速器故障原因分析

Analysis on Causes of Governor Failure During Start-up of Turbine on a Large Hydropower Station

针对某大型水电站机组开机过程中调速器报全频故障,通过对开机过程中监控系统有关调速器事件记录和调速器控制系统程序分析检查,发现当调速器开机过程中残压或齿盘出现跳变大于45 Hz时,均会引起调速器进入空载状态并导致全频故障。因此通过完善调速器开机过程中进入空载态逻辑并进行开机验证,避免了因频率跳变而引起调速器在开机过程中报全频故障。

In view of the fact that full frequency fault occurs to governor during startup of generator sets on a large hydropower station,through inspection and analysis on governor related event records from the monitoring system and control program of governor system during start-up,it is found that when residual pressure or gear wheel jumps more than 45 Hz during start-up of the governor,the governor is caused to enter into no-load state which finally leads to full frequency fault.By perfecting the logic of the governor entering into no-load state during the start-up process and performing boot-up verification,occurrence of full frequency fault to governor during startup due to frequency jumps is avoided.