耦合风光储及热泵的CCHP系统集成优化与运行特性研究

Research on integrated optimization and operation characteristics of CCHP system with wind-solar-storage and heat pump

为提高可再生能源的有效利用和冷热电联供系统的综合性能,在天然气冷热电联供系统中引入光伏电池、风力发电、地源热泵和储能单元,构建一种耦合可再生能源的天然气冷热电联供(wind-solar-storage and heat pump,combined cooling,heating and power,WSSH-CCHP)系统,利用层次分析法(analytic hierarchy process,AHP)建立考虑能效、经济及环境性能的综合评价指标,采用混合整数线性规划(mixed integer linear programming,MILP)算法,对该系统进行设备选型、容量配置及运行策略协同优化,以分供系统(separate production,SP)为参照系统,以济南市某能源中心为例,分析该系统集成优化效果及其运行特性。研究结果表明,该系统的综合指标优化结果相比SP系统提高37.8%,具有较好的综合性能,为耦合风光储及热泵天然气CCHP系统的发展及其集成优化与运行特性研究提供了参考。

A new combined cooling,heating and power system is proposed based on solar photovoltaic,wind power,ground-source heat pump and energy storage unit(WSSH-CCHP)to improve the efficient utilization of renewable energy resources and the entire system energy efficiency.The comprehensive evaluation indexes are developed by using the analytic hierarchy process to account for the system performance of energy efficiency,economy and environment.The mixed integer linear programming(MILP)algorithm is employed to perform the optimization on the selection of equipment types,capacity allocation and system operation stratagem.A case study on an energy center in Jinan city is conducted to explore the optimal performance and operation characteristics of WSSH-CCHP.The obtained results indicate that the proposed system comprehensive performance is much better than the separate production system,which provide useful information for the development of CCHP system with wind-solar-storage and heat pump and the study on its integrated optimization and operation characteristics.