三峡左岸电站ALSTOM机组导叶小开度振动原因分析及解决方案

Origin analysis and solution for the ALSTOM unit vibration in small guide vane opening of Three Gorges left bank plant

三峡水力发电厂首批机组于2003年7月投产发电,在首批机组调试试运行期间,ALSTOM供货的机组在甩负荷、紧急停机过程中出现了一些异常情况,通过各方努力,该问题基本解决。本文拟对关机过程中导叶小开度振动原因进行分析,并对机组关闭规律的优化方案及实施过程进行介绍。

The firstling units of Three Gorges hydropower plant have been put into operation in July 2003. The firstling units supplied by ALSTOM occurred the abnormal phenomena during the load rejection and emergency shut down. At the end, the problem got solution with the effort of all parts. The origin of the unit vibration in small guide vane opening is analyzed when the unit is closing and the optimal scheme of the unit closing law is suggested.