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The Compound Heatwave and Drought Event in the Summer of 2022 and the Impacts on the Power System in Southwest China

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  • Changyi Liu

    (Global Energy Interconnection Group Company Ltd., Beijing 100031, China)

  • Bo Lu

    (National Climate Centre, China Meteorological Administration, Beijing 100081, China)

  • Jie Liu

    (International Business School, Shaanxi Normal University, Xi’an 710119, China)

  • Fang Yang

    (Global Energy Interconnection Group Company Ltd., Beijing 100031, China)

  • Han Jiang

    (Global Energy Interconnection Group Company Ltd., Beijing 100031, China)

  • Zhiyuan Ma

    (Global Energy Interconnection Group Company Ltd., Beijing 100031, China)

  • Qing Liu

    (State Grid Energy Research Institute Co., Ltd., Beijing 102211, China)

  • Jiangtao Li

    (State Grid Energy Research Institute Co., Ltd., Beijing 102211, China)

  • Wenkai Liu

    (College of Science and Technology, China Three Gorges University, Yichang 443002, China)

Abstract

An unprecedented compound heatwave and drought (CHD) event occurred in the summer of 2022 in Southwest China. This extreme climate event posed significant challenges to the power system and highlights the importance of disaster risk management and adaptation to extreme climate events in the power sector. This paper assesses the complementary effects of variations in hydropower, wind, solar power generation and the power load gap in response to this CHD event. The CHD resulted in a remarkable 50% decrease in hydropower generation during the summer of 2022. Similarly, wind speeds in the southwest region slightly decreased from 2.0 m/s in mid-July to 1.7 m/s in early August. On the contrary, solar power generation doubled from mid-July to mid-August. In the summer of 2022, the increase in solar power generation could not compensate for the gap between the dramatically increased cooling demand and the reduced hydropower output. Nevertheless, it highlighted the potential synergy of power source grid load storage and hydro–wind–solar power combinations in addressing future CHD events, and the importance of early-warning for extreme climate events in the new-type power system in the future.

Suggested Citation

  • Changyi Liu & Bo Lu & Jie Liu & Fang Yang & Han Jiang & Zhiyuan Ma & Qing Liu & Jiangtao Li & Wenkai Liu, 2025. "The Compound Heatwave and Drought Event in the Summer of 2022 and the Impacts on the Power System in Southwest China," Energies, MDPI, vol. 18(10), pages 1-13, May.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:10:p:2424-:d:1651777
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    References listed on IDEAS

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    2. Han, Shuang & Zhang, Lu-na & Liu, Yong-qian & Zhang, Hao & Yan, Jie & Li, Li & Lei, Xiao-hui & Wang, Xu, 2019. "Quantitative evaluation method for the complementarity of wind–solar–hydro power and optimization of wind–solar ratio," Applied Energy, Elsevier, vol. 236(C), pages 973-984.
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