A two-stage framework for sizing renewable capacity in a hydro–photovoltaic–wind–pumped storage hybrid system

Jianhua Jiang, Bo Ming, Ting Yu, Qiang Huang, Jakub Jurasz, Pan Liu, Miao Yu and Long Cheng

Energy, 2025, vol. 334, issue C

Abstract: Renewable-dominated hybrid generation systems (HGSs) are being developed to address the problems of global warming and fossil-fuel energy shortages. To improve accuracy and efficiency for sizing the renewable power plant within a HGS, we propose a two-stage optimization framework for determining the renewable capacity in a hydro–photovoltaic (PV)–wind–pumped storage HGS, with particular emphasis on coordinating natural resource complementarity and hydropower flexibility dynamics. The methodology introduces a comprehensive fluctuation evaluation indicator to optimize PV-wind capacity allocation ratios, followed by scenario-based technical performance evaluation through daily operational simulations. The optimal renewable capacity is then obtained under various technical threshold constraints. A planned hydro–PV–wind–pumped storage HGS located in the Upper Yellow River basin, China, is selected as a case study. The results reveal distinct extrema in the fluctuation evaluation indicators, suggesting the existence of an optimal capacity ratio between PV and wind power for maximal complementary performance. This optimal ratio is identified as 30% PV and 70% wind power. The integration of pumped-storage hydropower (PSH) significantly reduces the electricity curtailment rate of the HGS during the non-flood season and the load loss rate during the flood season. Under reasonable technical constraints, the installed capacities of PV and wind power are determined to be 3090 MW and 7210 MW, respectively. This configuration results in a 53.8% improvement in renewable capacity compared with an HGS without PSH. Therefore, the proposed method offers a promising option for configuring the capacity of large HGSs with PSH.

Keywords: Pumped storage hydropower; Capacity configuration; Hybrid generation system; Renewable energy; Hydropower; Technical evaluation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:334:y:2025:i:c:s0360544225034000

DOI: 10.1016/j.energy.2025.137758

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