三峡左岸6#机过速试验中异常振动问题的解决及其模型试验研究

The Solution and Its Model Test Study of the Abnominal Oscillation Problem in Over-speed Test on Unit 6 Turbine for the Three Gorges Left Bank Power House

三峡左岸6#机过速试验中出现异常振动现象,现场通过优化关闭规律,特别是延长第三段关闭时间来得以解决。本文主要介绍解决该问题的思路、方法及过渡过程工况的模型试验结果,初步认定该现象的原因为水锤现象所致,为相关电站提供了参考。

During the overspeed test on the unit 6 turbine for the Three Gorges left bank power house, an abnormal oscillation problem happened and be solved by optimized the closing law, specially increase the closing time on the third time segment. In this paper, the idea, method and the model test for transient operation condition are introduced. And a conclusion that this abnormal oscillation is caused by water hummer phenomenon has been made. These experiences can be take as an reference for the relevant projects.