轴流式水轮机导叶两段关闭阀控制回路的改进

Improvement of Control Circuit for Guide Vane Two Section Close Valve for Axial-flow Turbine

为防止轴流式水轮机在停机过程中产生抬机现象，多在导叶操作回路上安装导叶两段关闭阀。本文对安居和驾虹两水电厂导叶两段关闭阀控制回路的缺点及改进进行了阐述。

Guide Vane two section close valveis normally installed in vane control circuit to prevent axialflow turbine from raising during shut-down period.The disadvantages and improvement of control circuit ofguide vane two section close valve are described for An in and Jiahong hydropower stations.