A Method For Analysing And Evaluating The Comprehensive Conversion Efficiency Of Pumped Storage Power Station

The comprehensive conversion efficiency of Pumped Storage Power Station reflects the operation benefit of power station in power system. Analysing and studying the influencing factors of comprehensive conversion efficiency is very important to the overall design of power plant and efficiency improvement. This paper presents a method for analysis and evaluation of conversion efficiency of Pumped Storage Power Station based on a large number of daily operation data calculation, combined with model test, performance test and field efficiency measurement results. Through this method, the annual comprehensive conversion efficiency level of the power station is calculated. It is clear that the efficiency of the pump-turbine is the main factor, and the low efficiency level of the unit itself and the unreasonable generation operation mode lead to the low comprehensive conversion efficiency level. The measures and suggestions for improving the comprehensive conversion efficiency of the power station are put forward.