TWO-TIER OPTIMAL SCHEDULING OF WATER-PHOTOVOLTAIC STORAGE COMPLEMENTARY SYSTEM CONSIDERING MEDIUM- AND LONG-TERM RESERVOIR CAPACITY FLUCTUATIONS

Luo Jie; Liu Lingling; Zhou Hengquan

doi:10.19912/j.0254-0096.tynxb.2024-1929

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 124-133. DOI: 10.19912/j.0254-0096.tynxb.2024-1929

TWO-TIER OPTIMAL SCHEDULING OF WATER-PHOTOVOLTAIC STORAGE COMPLEMENTARY SYSTEM CONSIDERING MEDIUM- AND LONG-TERM RESERVOIR CAPACITY FLUCTUATIONS

Luo Jie, Liu Lingling, Zhou Hengquan

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Abstract

To address the impact of fluctuating reservoir capacity on the generation efficiency and stability of cascade hydropower stations,this paper proposes a two-level optimization scheduling method for a hydro-photovoltaic-storage complementary system that considers medium- and long-term reservoir capacity fluctuations.Typical output scenarios of PV and hydropower runoff are generated using kernel density estimation and Copula function,and the scenarios are reduced using K-means.The medium and long-term optimal scheduling model of water and solar power is established,and the fluctuation of the reservoir capacity of the cascade hydropower station is solved by genetic algorithm,which is used as the boundary condition of the short-term optimal scheduling model of the water-photovoltaic storage system, and the short-term scheduling model is solved by using Cplex to maximize the system benefit.The effectiveness of the method is verified by simulation analysis of a terrace hydropower station in Xinjiang.The results of the example analysis show that the water-photovoltaic storage complementary system can ensure the PV consumption through the fast regulation ability of the stepped hydropower station and the energy storage device,and after joining the medium- and long-term reservoir fluctuation constraints,the stepped hydropower station can reduce the outlet flow of the hydropower station and improve the power generation efficiency under the same output capacity.

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renewable energy / genetic algorithms / energy storage / reservoir capacity fluctuations / dual-layer optimization

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Luo Jie, Liu Lingling, Zhou Hengquan. TWO-TIER OPTIMAL SCHEDULING OF WATER-PHOTOVOLTAIC STORAGE COMPLEMENTARY SYSTEM CONSIDERING MEDIUM- AND LONG-TERM RESERVOIR CAPACITY FLUCTUATIONS[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 124-133 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1929

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