Volume 59

Co-optimization of regional integrated energy system and electric vehicle charging strategies: A case study of Hangzhou Qinshan Yang, Yingjun Ruan, Hua Meng, Tingting Xu, Yuting Yao, Chaoliang Wang, Wei Liu

Abstract

With the transformation of the energy structure and the rising penetration of electric vehicles (EVs), the planning and optimization of regional integrated energy systems (RIES) face new challenges. Using an industrial park in Hangzhou as a case study, this paper first optimizes the traditional high-carbon energy system by introducing electric chillers, ice storage, air source heat pumps, and battery storage, achieving significant reductions of approximately 48% in annual operating costs and 66% in carbon emissions. When EV charging loads are further incorporated into system planning, it is found that the demands for electricity, energy storage, and charging infrastructure increase significantly, resulting in higher total system costs and carbon emissions. To mitigate peak load pressures caused by EV charging, this study compares uncoordinated and coordinated charging strategies. The results show that coordinated charging not only reduces peak load by about 30%, but also decreases the required numbers of charging piles and energy storage capacity by 31% and 18%, respectively, while further lowering steam consumption, system costs, and carbon emissions, thus significantly improving system economy and flexibility. The findings suggest that fully tapping into the flexibility of EV loads and implementing smart coordinated charging are key to achieving low-carbon and efficient operation of RIES in future industrial parks.

Keywords Regional integrated energy system, electric vehicle, charging strategy, capacity planning