Multi-method combination site selection of pumped storage power station considering power structure optimization

Energy internet (EI) is the framework foundation for tackling climate change and environmental issues and achieving "carbon peak and carbon neutral". In this paper, considering the important function of pumped-storage power station (PPS) in promoting the "source-grid-load-storage" synergy and complement in the construction of EI, a novel evaluation index system and evaluation model for the site selection of PPS is proposed to provide decision support for the orderly construction of EI. Firstly, compatible with traditional engineering construction factors and multi-energy complementary needs, a systematic evaluation index system of PPS site selection is established from hydrological conditions, topographical and geological conditions, construction conditions, power grid development planning and economic and environmental benefits. Secondly, considering the inconsistency of conclusions of a single evaluation method, the cycle elimination mechanism based on Kendall's concordance coefficient (KCC) is introduced into the combination evaluation model of PPS site selection, and the validity measurement method of the model is defined. Finally, a case study on the site selection of PPS in Hebei province of China is carried out to verify the effectiveness of the combination evaluation model, and the sensitivity analysis is carried out. The research shows that it is highly feasible to use the index and model constructed in this paper for the site selection of PPS. The combination evaluation model based on cycle elimination solves the inconsistency of the evaluation conclusions and greatly improves the effectiveness of the combination evaluation model.