混流式水泵工况起动过渡过程导叶漏水的计算

本文利用动量矩定理推导出抽水蓄能电站水泵轮机导叶漏水量与漏水转矩的计算公式。同时在考虑漏水转矩的情况下，完成了两座抽水蓄能电站混流式水泵机组泵工况起动过渡过程的校核计算，分析了导叶间隙、漏水量等对起动过程的重要影响，过大的导叶间隙将使机组不能起动。计算分析表明，本文提出的考虑导叶间隙漏水影响进行泵工况起动过渡过程的计算方法是正确的。正确考虑漏水转矩影响，对水泵水轮机的运行特性和过滤过程的准确计算具

Calculation on Pump Starting Transient of Francis Pump-Turbine Unit in Consideration of Gate Leakage

The formula was deduced on gate leakage and leakage torque of Pump - turbine of pumped storage station. The theorem of moment of momentum was used in it. The checking calculation was finished on leakage torque of pump starting transient of francis pump - tuebine unit for two pump - generator plants. The important efforts was analyzed on starting. The unit can not start in much gate clearance. Calculation analysis shows that the calculated method on gate leakage of pump starting transient is correct. It has important engineering practice significance on pump - turbine operating character and precise calculation of transient in considering the effect of leakage torque.