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(一) 前言水轮机的额定水头(水轮发电机组发出额定功率时的最小水头)如选择不当,将直接影响水电站的建设投资与发电经济效益。因此,对水轮机的额定水头应根据水电站的水能特性进行多方案比较,选择最优的额定水头。中小型水电站多数为径流引水式,以往对这这种径流引水式水电站的水轮机额定水头有不少是选择不适当的,因而使选用的水轮机型号、转轮直径、额定转速等与水电站的运行特征不符,造成水轮
(A) Foreword Turbine rated head (turbine head rated power when issued the minimum head), if not properly selected, will directly affect the hydropower construction investment and power generation economic benefits. Therefore, the rated head of the turbine should be based on the hydropower characteristics of hydropower multi-program comparison, select the best rated head. Most of the small and medium-sized hydropower stations runoff diversion type. In the past, there were many unsuitable choices for the rated head of hydraulic turbines in this kind of run-of-river diversion hydropower station. Therefore, the selection of turbine type, runner diameter, rated speed, Does not match, causing the water wheel