三峡左岸电站5、6号机在135 m水位下并网发电前的过速试验中,当接力器行程关闭至约4%时,水轮机发生了罕见的异常剧烈振动现象,引起各方的关注。根据现场测量结果,结合全模拟模型试验,对引起异常振动的原因进行了初步分析,提出了避免过速关机时异常振动的具体措施,并已在2006年10月22日库水位蓄至156 m进行的过速试验中得到了验证。 During the over-speed test before the grid-connected power generation at the 135 m water level of No. 5 and No. 6 Left-bank Power Station of the Three Gorges Project, when the relay stroke was closed to about 4%, the turbine experienced a rare and unusual severe vibration, which aroused the concern of all parties. Based on the field measurements and the full simulation model test, the causes of the abnormal vibration are analyzed preliminarily, and the specific measures to avoid the abnormal vibration during the over-speed shutdown are proposed. On October 22, 2006, the reservoir water level was up to 156 m The overdrive test was validated.