Abstract: In view of the functional characteristic of pumped storage power plant, the concept of “auxiliary service benefit” is put forward, and the economic benefit index system of pumped storage power plants composed of financial evaluation, national economic evaluation and auxiliary service benefit is established. Firstly, the improved order relation analysis method is employed to determine the weight value of each index, and the point assignment is extended to interval assignment, hence improving the overall evaluation result. Subsequently, the quantitative indexes are processed dimensionless by non-linear method, and the qualitative indexes are quantified by the triangular fuzzy number method. Finally, the comprehensive values of the evaluation indexes are obtained via linear weighting. The applicability of the present method and the logic of the evaluation are verified through a practical case.

Key words: pumped storage power plant, economic benefit, auxiliary service benefit, improved order relation analysis method, comprehensive evaluation