传统的能源系统分析规划研究局限于电、气、热(冷)等单一能源形式系统的内部。多能源系统的统筹协调有利于促进可再生能源吸纳,提高能源利用效率。文中首先介绍了多能源系统的结构,分析了电、气、热(冷)等子系统的特征,探讨了协同效益,进而阐述了能源流分析计算方法。基于此,对多能源系统的优化运行与优化规划问题进行了分析、讨论。最后,总结了多能源系统分析与规划的关键问题,以期为相关研究提供参考。 Traditional energy system analysis and planning research limited to the single-energy form system such as electricity, gas, hot (cold) and so on. The overall coordination of multi-energy systems is conducive to promoting the absorption of renewable energy and improving energy efficiency. The paper first introduces the structure of multi-energy system, analyzes the characteristics of subsystems, such as electricity, gas, heat (cold) and so on, and discusses the synergistic benefits, and then elaborates the method of energy flow analysis and calculation. Based on this, the optimization and planning of multi-energy system are analyzed and discussed. Finally, the key problems in the analysis and planning of multi-energy systems are summarized in order to provide reference for the related research.