Study on Comprehensive Evaluation of Energy Saving Index System in Pumped Storage Power Station Based on Vertical Scatter Degree Method

The paper establishes an energy efficiency index system of pumped storage power station, and designs a dynamic comprehensive evaluation algorithm of energy efficiency levels for pumped storage power station based on comprehensive objective and subjective weighting method, which uses the historical data and achieves a comprehensive evaluation of the energy levels for pumped storage power station in a multi-period. Firstly, the paper introduces the energy flow structure and the operation characteristics of pumped storage power station and establishes an energy efficiency index system, and then the synthesized weights of each index are determined by G1 method and vertical scatter degree method. This paper proposes to set the index observation method margin and uses linear projection method to process the quantitative indicators dimensionlessly, and uses expert grading method to quantify the qualitative indicators. Finally, the linear weighted sum of indexes values in the energy level at each period for the pumped storage power station is figured out. The performance of this model and the reasonableness of evaluation are verified by an application in the dynamic evaluation of a pumped storage power station.