平班水电站甩负荷试验异常分析及处理

Analysis and Treatment of Load Rejection Test Failure in Pingban Hydropower Station

文章详细阐述了平班水电站1号机组在甩负荷试验时调速器调节失灵,出现导叶不能回关以至机组过速停机故障的原因分析及处理方法,提出在调速系统检修试验过程中,将调速器重要参数优化整定项目列为常规检修工作,并将关键设备部件的使用年限进行统计分析,定期测试其性能要求,可避免类似异常事件再次发生。

The paper introduces the causes and treatments of a load rejection test failure （unit shutdown due to over- speed, resulting from the unclosed guide vane because of malfunction of governor） in Pingban hydropower station. It is suggested to list the important governor parameters into the routine inspection items, record the service lives of key e- quipment parts and periodically test their performances, so as to avoid similar failures.