分布式冷热电联供系统优化配置与适用性分析

Optimal Allocation and Applicability Analysis of Distributed Combined Cooling-Heating-Power System

为提高冷热电联供系统在不同负荷结构下的优化配置水平与综合运行效益,对计及蓄能装置的冷热电三联供系统的优化配置及运行进行了深入研究。基于以热定电、以电定热和多目标综合效益最优的3种运行模式,建立了综合考虑能源、经济和环境效益的多目标优化模型,利用遗传算法对系统设备容量和运行模式进行了优化。然后,分析了能源价格与引入蓄能装置对冷热电联供系统综合效益的影响。最后,基于某建筑负荷不同的冷电比和热电比对上述内容进行仿真分析,并以分供系统作为参照对象,给出了不同负荷结构下冷热电联供系统的最佳配置及最佳运行模式。优化结果表明,在大部分负荷结构下,冷热电联供系统采用多目标综合效益最优运行模式时各方面效益更好。

In order to improve optimal allocation level and comprehensive operation benefit of combined cooling-heating- power （CCHP） system under different load structure, optimal allocation and operation of CCHP system with energy storage device were studied. Based on three operation modes, i.e. ordering power by heating, ordering heating by power and multi-objective comprehensive benefit optimization, equipment capacity and operation modes are optimized with genetic algorithm to achieve maximum energy, economy and environment benefits. Effects of energy prices and introduction of energy storage device on comprehensive benefit of CCHP system were analyzed. Finally, a building load of different cooling-to-power and heat-to-power ratios were selected as a study case to obtain optimal configuration and operation model of CCHP system under different load structure in comparison to separated production （SP） system. Results indicate that when CCHP system operates at multi-objective comprehensive benefit optimization mode, its benefit in each respect is better in the most load structure.