机组导叶分段启闭规律优化研究

Study on Broken-Line Open or Shut Mode of Guide Blade on Transient Process of Hydropower Station

摘要: 对水电站机组导叶启闭规律进行系统的研究，对应不同的启闭规律进行调保计算并进行分析比较，证实分段关闭规律优于直线关闭规律，采用分段关闭时蜗壳末端压力和机组转速上升有相应的减小，有利于水电站安全经济运行，由此提出在设计过程和对电站改造过程中对直线关闭就能满足规范要求的坝后式电站应优先考虑采用导叶分段关闭。

Abstract: Attention is concentrated on law of guide vane opened or closed. Analysis and computation for regulating guarantee of dam-rear power station at different law of guide vane were made to enable result to be compared. It’s confirmed that the broken-line shut mode of guide blade is better than the closure of straight line to low maximum pressure at the end of spiral housing and maximum momentary overspeed of unit when unit is closed. So broken-line open or shut mode of guide blade should be give priority than the closure of straight line in the process of the designing and transforming for dam-rear power station.