中小型水电机组直联与变速的技术经济比较

中小型水电机组，尤其是低水头大流量机组采用直联传动好？还是变速传动好？这是一个技术经济指标及技术性决策的问题，为此，通过对造成中小型水电行业一直采用直联传动形式的原因进行分析，提出了解决问题的几种方法，并详细说明了变速传动的技术经济优势和现在采用变速传动的可行性。

Technical Economy Comparison between Direct - connected and Variable Transmission for Medium and Small Scale Hydropower Units

For medium and small scale hydropower units, especially for hydropower units of low head and large discharge,which transmission is better for adopting, the direct connected or the variable transimission? This is an important problem related to technical economy indexes and technical decision making. Therefore, through analying causes of adopting direct connected transmission for medium and small scale hydropower units by the hydropower enterprise authorities in the past long period, several methods for solving the problem are proposed. And the technical economy advantages of the variable transmission and its feasibility in the present time are explained in detail.