计及分时电价的冷热电联供系统三级协同优化

Three-level collaborative optimization of cogeneration of cold,heat and power including TOU price

针对现有冷热电联供系统大多对优化因素考虑单一,使用固定电价导致优化结果与实际存在偏差,本文提出一种计及分时电价的冷热电联供三级协同优化方法。首先,计及分时电价,以热电比决定系统的运行模式,对一级优化针对系统能效性,以一次能源利用率最大作为优化目标;其次,二级优化针对系统环保性,以二氧化碳排放量最小作为优化目标;最后,三级优化针对系统经济性,以年总费用最小作为优化目标。以某学校的年运行负荷数据作为算例分析,采用改进粒子群算法对所建立模型进行求解,对固定电价和计及分时电价的结果进行对比分析,得到计及分时电价,对设备进行更好的选型和对容量进行更优的配置。

In view of the fact that most existing cogeneration systems consider single optimization factors,the use of fixed electricity price which leads to the deviation between the optimization results and the actual situation,this paper proposes a three-level collaborative optimization method for cogeneration of CHD including TOU electricity price.The TOU price is taken into account first,and the operation mode of the system is determined by the thermoelectric ratio.For the first-order optimization,the system energy efficiency is targeted,and the maximum utilization rate of primary energy is taken as the optimization goal.Secondly,the secondary optimization aims at the environmental protection of the system,with the minimum carbon dioxide emissions as the optimization target.Finally,the three-level optimization aims at the system economy and takes the maximum annual total cost as the optimization goal.Taking the annual operating load data of a school as an example,the improved particle swarm optimization algorithm is used to solve the established model,and the results of fixed electricity price and TOU price are compared and analyzed.After the TOU price is calculated,the equipment can be better selected and the capacity can be better configured.