Problems and Strategies for Maintenance Scheduling of a Giant Cascaded Hydropower System in the Lower Jinsha River

Le Li, Yushu Wu, Yuanyuan Han, Zixuan Xu, Xingye Wu, Yan Luo and Jianjian Shen ()
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Le Li: China Yangtze Power Co., Ltd., Yichang 443000, China
Yushu Wu: Institute of Hydropower and Hydroinformatics, Dalian University of Technology, Dalian 116000, China
Yuanyuan Han: China Yangtze Power Co., Ltd., Yichang 443000, China
Zixuan Xu: Institute of Hydropower and Hydroinformatics, Dalian University of Technology, Dalian 116000, China
Xingye Wu: China Yangtze Power Co., Ltd., Yichang 443000, China
Yan Luo: China Yangtze Power Co., Ltd., Yichang 443000, China
Jianjian Shen: Institute of Hydropower and Hydroinformatics, Dalian University of Technology, Dalian 116000, China

Energies, 2025, vol. 18, issue 14, 1-22

Abstract: Maintenance scheduling of hydropower units is essential for ensuring the operational security and stability of large-scale cascaded hydropower systems and for improving the efficiency of water energy utilization. This study takes the Cascaded Hydropower System of the Lower Jinsha River (CHSJS) as a representative case, identifying four key challenges facing maintenance planning: multi-dimensional influencing factor coupling, spatial and temporal conflicts with generation dispatch, coordination with transmission line maintenance, and compound uncertainties of inflow and load. To address these issues, four strategic recommendations are proposed: (1) identifying and quantifying the impacts of multi-factor influences on maintenance planning; (2) developing integrated models for the co-optimization of power generation dispatch and maintenance scheduling; (3) formulating coordinated maintenance strategies for hydropower units and associated transmission infrastructure; and (4) constructing joint models to manage the coupled uncertainties of inflow and load. The strategy proposed in this study was applied to the CHSJS, obtaining the weight of the impact factor. The coordinated unit maintenance arrangements of transmission line maintenance periods increased from 56% to 97%. This study highlights the critical need for synergistic optimization of generation dispatch and maintenance scheduling in large-scale cascaded hydropower systems and provides a methodological foundation for future research and practical applications.

Keywords: maintenance scheduling; cascaded hydropower system; power generation dispatching; multi-dimensional influence (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: 2025
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