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A novel scheduling strategy of a hybrid wind-solar-hydro system for smoothing energy and power fluctuations

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  • Shi, Yunhong
  • Li, Chengjiang
  • Wang, Honglei
  • Wang, Xiaolin
  • Negnevitsky, Michael

Abstract

Hybrid wind-solar-hydro-storage system integrates multiple uncertain renewable energy sources and storage systems to maximize outputs and stability in modern power systems. However, the challenge of differentiated fluctuations presented by renewable energy generation across different time scales degrades the system operation performance. This study constructed a hybrid system including wind, photovoltaic, and cascade hydropower plants, and a multi-objective coordinative scheduling strategy, to smooth energy and power fluctuations. Strategies are explored using a collaborative operation mode with grouped energy storage to address uncertain power deviations during real-time adjustments within a day. The strategy can effectively optimize the internal load distribution of energy routers, avoiding up to 15.17 % of unnecessary operational fluctuations in day-ahead scheduling and reducing the fluctuation mitigation potential by up to 27,6 %. Additionally, it achieves up to 64.69 % reduction in profound operational fluctuations. The load-side flexibility mechanism enhances economic efficiency by up to 11.26 %. Furthermore, the strategy increases the risk coverage ratio while reducing the failure amount and frequency of daily power fluctuation suppression by 96.91 % and 94.44 %. The proposed strategy provides an effective solution for large hybrid systems to smooth energy and power fluctuations, while also delivering ecological and navigational benefits alongside significantly stabilized operations.

Suggested Citation

  • Shi, Yunhong & Li, Chengjiang & Wang, Honglei & Wang, Xiaolin & Negnevitsky, Michael, 2025. "A novel scheduling strategy of a hybrid wind-solar-hydro system for smoothing energy and power fluctuations," Energy, Elsevier, vol. 320(C).
    • Handle: RePEc:eee:energy:v:320:y:2025:i:c:s0360544225009107
    DOI: 10.1016/j.energy.2025.135268
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    References listed on IDEAS

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