The coordinated operation and comprehensive utilization of multi-energy sources require systematic research. A multi-energy microgrid (MEMG) is a coupling system with multiple inputs and outputs. In this paper, a system model based on unified energy flows is proposed to describe the static relationship, and an analogue energy storage model is proposed to represent the time-dependency characteristics of energy transfer processes. Then, the optimal dispatching model of an MEMG is established as a mixed-integer linear programming (MILP) problem using piecewise linear approximation and convex relaxation. Finally, the system model and optimal dispatching method are validated in an MEMG, including district electricity, natural gas and heat supply, and renewable generation. The proposed model and method provide an effective way for the energy flow analysis and optimization of MEMGs.

中文翻译：

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储能多能量微电网的系统建模与优化调度

多种能源的协调运行和综合利用需要系统的研究。多能量微电网（MEMG）是具有多个输入和输出的耦合系统。本文提出了一种基于统一能量流的系统模型来描述静态关系，并提出了一种模拟能量存储模型来表示能量转移过程的时间依赖性。然后，使用分段线性逼近和凸松弛，将MEMG的最优调度模型建立为混合整数线性规划（MILP）问题。最后，在MEMG中验证了系统模型和最佳调度方法，包括区域电力，天然气和热力供应以及可再生能源发电。