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目前水电站設計中,对于水电站开發方案选择,水电站的参变数、建筑物和設备的尺寸的选择,均采用“抵偿年限”計算法进行技术經济比较。“抵偿年限”計算法系采取所设計水电站与相应的替代电站,基于国民經济的整体利益,比較投资和运轉费用。即在一定的允許年限(抵偿年限)内,达到同等效益而所付出的总費用(包括投资和允許年限内的运轉费用)最小的
At present, in the design of hydropower stations, for the selection of hydropower development projects, the selection of hydropower plants, the size of buildings, and the size of equipment, the “compensation period” calculation method is used for technical and economic comparison. The “compensation period” calculation method adopts the designed hydropower station and the corresponding alternative power station, and compares investment and operation costs based on the overall interests of the national economy. That is, within a certain number of years of service (compensation period), the total cost (including investment and operating costs within the allowable period) to achieve the same benefit is the smallest