抽水蓄能电站水泵水轮机组选型思考

Suggestion on selection of pump-turbine of storage power station

水泵水轮机选型对机组设计尤为重要,尤其是在电站建设前期,机组还没有生产制造。但是电站的一些参数必须确定下来,如转速、额定水头、机组容量等,这些参数的选择对机组性能的影响很大。本文从水力设计的角度出发,对比转速的确定、额定水头的选择、水头变幅、吸出高度和压力脉动的水平高低进行分析,希望对机组选型和电站建设有一定的帮助。

The type selection of pump-turbine is especially important for the design of unit,especially in the early stage of the construction of power station,the unit has not been designed.However,some parameters of the power station must be determined,such as specific speed,rated head,capacity of the unit,etc. The selection of these parameters has a great impact on the performance of the unit,so the selection of unit is particularly important. Comparison in this paper,from the perspective of hydraulic design,the selection of rated head,suction height,and pressure pulsation level were analyzed. And the suggestion is a little helpful of unit selection and plant construction.