基于光伏建筑一体化的电池-热泵储能系统性能及运行策略优化研究

A battery-heat pump energy storage system based on Building Integrated Photovoltaic(BIPV) is designed in this paper. A heat pump system is used to preheat or precool the room to achieve cool/heat energy storage and batteries are used to achieve electrical energy storage. The BIPV, batteries, and air source heat pump are combined in this system to achieve comprehensive energy utilization. Based on the conversion of electrical and thermal energy, the operating cost of the system can be reduced by improving the matching between solar power generation and load utilization. The annual operation performances of four systems are simulated. The results show that the system with both electric and cool/heat energy storage is the most economical, with saving EUR 379 in operating costs per year. In order to obtain the optimal control parameters of the system, the control strategy based on time-sharing tariffs is carried out using a variety of optimization algorithms. Six parameters are selected for optimization, including preheating time, preheating temperature, precooling time, precooling temperature, battery valley charging SOC in the heating season, and the battery valley charging SOC in the cooling season. The minimum annual operating cost is used as the objective function. The results show that the annual operating cost after optimization can be reduced by 14.6%—27.6% compared with the pre-optimization. The energy storage system comprehensively utilizes various clean energy sources and can achieve coordinated operation between photovoltaic power generation, batteries, and air source heat pumps, which has broad application prospects in the field of building energy conservation.