某抽水蓄能电站首次泵工况启动关键因素的数值分析

Numerical Analysis of Key Issues of Initial Pump Start of Pumped Storage Power Station

根据某抽水蓄能电站实际水力布置情况,在分析其上库的实际充水特点和引水隧洞中明满流交替的水力特征的基础上,建立相应数学模型,采用特征隐式格式法求解有压管道非恒定流方程,优化了机组首次泵工况运行时的导叶开关规律及球阀关闭规律等关键因素,并利用优化后的关键因素对泵工况进行了大波动过渡过程计算,结果具有合理性。

According to practical layout of a pumped storage power station,on the basis of the analysis of the actual upper reservoir water-filled characteristics and hydraulic characteristics of the diversion of free flow and full flow in tunnel,the mathematical model was established.Then characteristic implicit format method was adopted to solve unsteady flow equation of pressure pipeline.The opening and closing rule of guide vane during initial pump running of units and the closing rule of ball valve under special cases were optimized.The calculation results have been applied for transient process of major fluctuations,and it is reasonable.