中文摘要：

水电站装机容量大小直接关系水电站的规模和动能效益、水能资源利用程度及水电站的投资和设备的合理利用,其选择是一个复杂的动能经济问题。在研究水电站装机容量影响因素及不合理现象的基础上,揭示了传统装机容量选择不合理的原因：在对国内外水电站装机利用小时调查的基础上,对水电站装机容量选择的趋势做了一定推测。

英文摘要：

The installed capacity of a hydropower station is directly related to its scale and kinetic energy efficiency,its efficiency of water energy use,and the rational utilization of its investment equipments.To choose a reasonable installed capacity is a complicated issue of energy economy.This paper discusses the reasons why the traditional method of determining the installed capacity is unreasonable by analyzing the influencing factors and the existing unreasonable phenomenon,and shows the method development trend through an investigation of the recent use of installed capacity in China and overseas.