为促进新能源消纳和建筑用能的节能降碳,提出一种计及电网供给-光能利用-热能转换的建筑多能耦合供热系统,针对其可行系统架构,考虑优先太阳能利用运行策略或提高电网运行稳定性运行策略,构建多目标双层优化模型,确定系统中光-电/热、电-热及储能环节的优选设备及其容量,对比两种运行策略下系统优化配置方案及全年运行效果。结果表明：为达到经济性和能效综合最优,建筑多能耦合供热系统应优先配置太阳能集热器、PV/T、电热泵及中温蓄热罐;与优先太阳能利用运行策略相比,提高电网运行稳定性运行策略既实现了电网削峰填谷,又使年化总成本降低2.63%,具有更高的经济性,在系统设计与运行调控中可优先选择。
Abstract
In order to promote renewable energy consumption and energy saving and carbon reduction in the field of building energy, a building multi-energy coupling heating system considering grid supply, solar utilization and thermal energy conversion is proposed. Based on its feasible system architecture, two operational strategies: prioritizing solar energy utilization and enhancing grid operational stability are developed. A multi-objective bilevel optimization model is developed to determine the optimal equipment and their capacities in the photoelectric/thermal, electric-thermal and energy storage segments in the system. The optimal configuration schemes and the annual operating performance under the two operational strategies are compared. The results indicate that in order to achieve the best comprehensive performance in terms of economy and energy efficiency, the building multi-energy coupling heating system should preferably be equipped with a solar collector, PV/T, an electric heat pump and the medium-temperature heat storage tank. Compared to the operation strategy prioritizing solar energy utilization, the operation strategy enhancing grid operation stability not only realizes the peak shaving and valley filling of the grid, but also reduces the annualized total cost by 2.63%, offering higher economic efficiency. Thus, it can be prioritized in system design and operation control.
关键词
太阳能 /
供热 /
多目标优化 /
多能耦合 /
设备优选 /
双层优化
Key words
solar energy /
heating /
multiobjective optimization /
multi-energy coupling /
equipment optimization /
bilevel optimization
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基金
国家电网有限公司科技项目（5400-202212166A-1-1-ZN）
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