关于抽水蓄能电站循环效率系数的探讨

Exploration on Cycle Efficiency Factor for Pumped Storage Plant

循环效率系数是抽水蓄能电站的重要参数之一，它是由电力系统和抽水蓄能电站的特性及运行方式决定的，然而，在抽水蓄能电站的规划设计中，循环效率系数的取值又影响着电力系统中可投入的抽水蓄能电站的装机规模、运行方式和电站效益．因此，合理拟定该参数具有十分重要的意义．影响循环效率系数的因素包括地形条件、电站上池和下池的调节性能及工作深度，以及电站在系统中的运行方式等．确定了上述诸影响因素，抽水蓄能电站的循环效率系数即可在某一装机规模下，依据系统典型日电力电量平衡成果，针对电站在不同工况下的出力过程，采用试算法，进行水量平衡计算即可求得．

Cycle efficiency factor is one of the important parameters of pumped storage plant. It is decided by power system and the characteristics and operation mode of pumped storage plant. However, in pumped storage plant's planning and design, the value of cycle efficiency factor also has influence on the installed scale, operation mode and benefit of the proposed pumped storage plant which will put into the power system operation. Therefore, to properly select this parameter is very important. Elements that influence the cycle efficiency factor include topographic conditions, regulation function,working depths of upper and lower pool, and operation mode of pumped storage plant in power system. If all these elements are determined, cycle efficiency factor of a certain scale pumped storage plant can be obtained with pilot calculation based on the typical daily electric power and energy balance results of the power system, and the output process of pumped storage plant under different mode.