锦屏二级水电站筒阀动水关闭试验及仿真分析

为检测筒阀在长距离输水电站中的实际运行情况，借助现场试验手段，对锦屏二级水电站机组带部分负荷时筒阀动水关闭过程中机组状态量的变化情况进行了检测。对试验数据进行了整理分析，并利用数值仿真手段对筒阀动水关闭过程进行了仿真模拟。现场试验与数字模拟对比结果显示，二者吻合度较高，验证了数值仿真计算的准确性。在此基础上，利用数值仿真手段对筒阀关闭极端工况进行了预测，预测结果显示，机组带100%负荷，筒阀动水关闭时蜗壳进口压力未超出设计值。研究方法和手段可为电站机电设备的安全运行提供依据。

Experiment of dynamic closing process of cylindrical valve at Jinping Power Station II and simulation analysis

In order to test the actual operation of cylindrical valve in hydro-power station with long-distance water delivery system, the change of state variables of the unit under partial load in the dynamic closing process of the cylindrical valve was detected by the field test method. The dynamic closing process of cylindrical valve was simulated numerically on the basis of the test data. The comparison results showed that the two were highly consistent, which proved the accuracy of the numerical simulation. The prediction for the extreme modes of cylindrical valve closing process by the numerical simulation method indicated that the pressure at the inlet of the spiral case in 100% load met the requirements of the contract. It provides basis for ensuring the safe operation of mechanical and electrical equipment of hydropower stations.