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Long-medium-short term nested operation model of hydro-wind-solar hybrid power system considering flood control, power generation, ecology and navigation

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  • Zhang, Zhendong
  • Dai, Huichao
  • Wang, Yongqiang

Abstract

The joint operation of the hydro-wind-solar (HWS) hybrid power system can effectively promote the consumption of wind power and solar power, and reduce its destabilizing impact on the power grid. However, hydropower has its own operation tasks in different operation periods throughout the year. Therefore, how to consider other operation tasks in the joint operation of HWS hybrid system is the focus of this study. Firstly, the operation demands of HWS hybrid system in flood control, power generation, ecology and navigation are analyzed in the form of operation objectives or constraints. Then a long-medium-short term nested operation model is constructed and a method to solve the operation model is proposed. Finally, the model and method proposed in this study are validated in a case study. The main conclusions are as follows: (1) The joint operation of the HWS hybrid system will reduce the power generation of hydropower, but increase the total power generation. With the increase of wind power and solar power installed capacity, the increase rate of total power generation shows a law of diminishing marginal benefit. (2) The long-medium-short term nested model can effectively meet the integrated demands of flood control, power generation, ecology and navigation. (3) The peak load regulation demand of HWS hybrid system is easier to meet in typical days of flood season than in dry season and ecological operation period.

Suggested Citation

  • Zhang, Zhendong & Dai, Huichao & Wang, Yongqiang, 2025. "Long-medium-short term nested operation model of hydro-wind-solar hybrid power system considering flood control, power generation, ecology and navigation," Energy, Elsevier, vol. 334(C).
    • Handle: RePEc:eee:energy:v:334:y:2025:i:c:s036054422503347x
    DOI: 10.1016/j.energy.2025.137705
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