分布式风光电联合供热系统运行策略优化计算

提出电驱动空气源热泵(两级压缩式)、太阳能集热器、风力机制热器、蓄热装置联合运行的分布式联合供热系统。建立多目标优化数学模型,以计算时间内运行成本最小与二氧化碳排放量最小共同作为优化目标,针对北方某供暖建筑,利用NSGA2算法进行多目标规划问题处理。在得到两优化目标折衷解的基础上,获得计算日各装置制热量、蓄(放)热量,确定最佳运行策略:热负荷低谷期(9:00—16:00)是阳光充足时段,太阳能集热器与风力机制热器的制热量超出热负荷,蓄热装置储存富余热量。热负荷高峰时段(0:00—9:00、16:00—24:00),由于太阳辐照度比较小甚至为0,不启用太阳能集热器,风力机制热器制热量波动比较大,需要由空气源热泵作为主要供热设备,必要时蓄热装置放热。

Optimal Calculation of Operating Strategy for Distributed Wind-photoelectric Combined Heating System

A distributed combined heating system with electrically driven air source heat pumps( two-stage compression),solar collectors,wind-driven heat generator,and heat storage devices is proposed.A multi-objective optimization mathematical model is established,and the minimum operating cost and the minimum carbon dioxide emissions in the calculation time are taken as the optimization goals. For a heating building in the north,the NSGA2 algorithm is used to deal with the multi-objective planning problem. On the basis of obtaining the compromise solution of the two optimization goals,the heat generation and storage( release) heat of each device on the calculation day are obtained,and the optimal operation strategy is determined: the low heat load period( 9: 00 to 16: 00) is the sunny period,when the heat generated by the solar heat collector and the wind-driven heat generator exceeds the heat load,and the heat storage device stores the excess heat. During the peak heat load periods( 0:00 to 9: 00 and 16: 00 to 24: 00),since the solar irradiance is relatively small or even zero,solar collector is not used,and the heat generated by wind-driven heat exchangers fluctuates greatly. Air source heat pumps are required as the main heating equipment,and heat storage devices release heat when necessary.