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南丰县是一个以小水电供电为主的县,小水电建设历史较长。南丰县小水电绝大部分是60年代后期至70年代建成投产的,经过20多年的运行,有一大批电站的机电设备和水工建筑物,由于汽蚀、磨损、破坏、老化以及电站建设中种种因素造成的不合理现象等,使得电站效率日渐下降,年发电量逐年减少。因此对这些老电站必须进行必要的更新改造,使电站恢复、达到原设计能力。这比兴建同容量(所增加的出力)小水电站的造价要
Nanfeng County is a small hydropower-based county, a long history of small hydropower construction. Nanfeng County, the vast majority of small hydropower built and put into operation from the late 1960s to the 1970s, after more than 20 years of operation, a large number of mechanical and electrical equipment and hydraulic structures of power plants due to cavitation, abrasion, destruction, aging, and power plant construction Irrational factors caused by factors, making the power plant efficiency declining, annual power generation decreased year by year. Therefore, these old power plants must be rebuilt as necessary to restore the power station and reach the original design capability. This is more than the cost of constructing a small hydropower station with the same capacity (increased output)