Introduction: As global renewable energy capacity continues to expand, the development of large-scale, flexibly dispatchable integrated energy systems has become increasingly important. Hydro–Photovoltaic–Storage (HPS) systems in high-altitude plateau regions provide abundant hydropower and solar resources. However, persistently low temperatures in these areas severely impair the efficiency of lithium iron phosphate (LFP) battery storage systems (BESS), thereby reducing performance and limiting the overall economic benefits and operational flexibility of the integrated system. Methods: This study proposes an optimized dispatch strategy for integrated HPS systems operating in low-temperature environments. A joint modeling framework coupling the HPS system with Heating, Ventilation, and Air Conditioning (HVAC) thermal regulation is established to mitigate battery efficiency degradation under extreme cold conditions. The proposed strategy enables coordinated operation across hydropower, photovoltaic generation, and temperature-compensated battery storage, ultimately achieving globally optimal scheduling of the overall system. Results: A case study in southeastern Tibet demonstrates that active HVAC heating improves battery efficiency under low temperatures, reducing system operating costs by 11.1% compared to conventional operation without thermal support. The proposed approach enhances both storage utilization and system resilience. Discussion: The temperature-coupled joint model effectively improves energy storage efficiency in low-temperature environments. Spatial correlation modeling and HVAC compensation enhance system resilience in extreme climates. Conclusion: The optimized operating mode of HPS in cold-plateau environments can effectively reduce costs and make the operation of large-scale new energy bases more economical.
Chen et al. (Tue,) studied this question.