Optimal Scheduling of a Cascade Hydropower Energy Storage System for Solar and Wind Energy Accommodation

Yuanyuan Liu, Hao Zhang (), Pengcheng Guo (), Chenxi Li and Shuai Wu
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Yuanyuan Liu: School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China
Hao Zhang: School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China
Pengcheng Guo: School of Water Resources and Hydro-Electric Engineering, Xi’an University of Technology, Xi’an 710048, China
Chenxi Li: State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
Shuai Wu: State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China

Energies, 2024, vol. 17, issue 11, 1-23

Abstract: The massive grid integration of renewable energy necessitates frequent and rapid response of hydropower output, which has brought enormous challenges to the hydropower operation and new opportunities for hydropower development. To investigate feasible solutions for complementary systems to cope with the energy transition in the context of the constantly changing role of the hydropower plant and the rapid evolution of wind and solar power, the short-term coordinated scheduling model is developed for the wind–solar–hydro hybrid pumped storage (WSHPS) system with peak shaving operation. The effects of different reservoir inflow conditions, different wind and solar power forecast output, and installed capacity of pumping station on the performance of WSHPS system are analyzed. The results show that compared with the wind–solar–hydro hybrid (WSH) system, the total power generation of the WSHPS system in the dry, normal, and wet year increased by 10.69%, 11.40%, and 11.27% respectively. The solar curtailment decreased by 68.97%, 61.61%, and 48.43%, respectively, and the wind curtailment decreased by 76.14%, 58.48%, and 50.91%, respectively. The high proportion of wind and solar energy connected to the grid in summer leads to large net load fluctuations and serious energy curtailment. The increase in the installed capacity of the pumping station will promote the consumption of wind and solar energy in the WSHPS system. The model proposed in this paper can improve the operational flexibility of hydropower station and promote the consumption of wind and solar energy, which provides a reference for the research of cascade hydropower energy storage system.

Keywords: multi-energy hybrid generation; wind and solar power; cascade hydropower stations; complex hydraulic coupling; pumping station; water energy storage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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