区域综合能源系统是从整体角度定义的限定范围内电、气、热多种能源耦合的系统，是能源互联网建设的重要内容。由于电、气、热显著的特性差异及互补特征，区域综合能源系统规划是具有重要意义和挑战性的课题。本论文基于区域综合能源系统灵活性和多能源交互影响，从系统模型、规划运行一体化、评价准则三个方面开展研究，为区域综合能源系统规划方案的制定和决策提供理论依据。首先，针对区域综合能源系统性、整体性建模要求，建立了反映综合能源系统耦合关系的统一能流模型。以能流为唯一的物理量实现了能量转换、能量存储、能量传输组件的统一建模，并基于加权有向图，建立了包含网络的系统静态平衡关系模型。同时，针对电、气、热能源传输动态过程的差异，用类比储能模型模拟能量传输动态，进而反映系统状态的动态变化，实现能源间交互影响及灵活性的集成建模。其次，在统一能流模型的基础上，考虑各能源设备的协调运行和网络约束、储能设备和类比储能的动态过程，以及运行场景的不确定性，以经济性为目标建立了区域综合能源系统的优化配置模型，并利用分解协调方法实现系统规划运行一体化全局优化求解。论文所提出优化模型从区域综合能源系统整体利益出发，实现了系统集中能源设施与各分布能源设施的协调优化配置，充分利用系统的灵活运行能力，有效促进可再生能源利用，实现节能减排目标。最后，论文针对综合能源系统的多重规划目标，基于系统运行策略，开展系统能源消耗和价值评估方法的研究。论文利用系统能流的连续性和可加和性，将系统运行策略映射为路径选择，建立了快速能流及能流损耗的计算方法。论文考虑系统与能源市场的交互，集成系统能量流、经济流，基于能量价值理论建立了综合能源系统客观价值评价方法，实现系统可再生能源利用、环境影响等评价，为促进综合能源系统可持续发展提供依据。本论文针对区域综合能源规划的复杂性，在系统建模、优化配置、评价方法方面做出一定的贡献，为区域综合能源系统规划技术的发展提供了支持。
The district multi-energy system (DMES) is a system that couples multiple sources of electricity, gas, and heat within a limited range defined from an overall perspective, and is an important part of the construction of the energy internet. Due to the significant differences in characteristics of electricity, gas, and heat, the planning of MES is an important and challenging subject. Based on the flexibility and interaction of MESs, this dissertation conducts research from three aspects: system model, integration of planning and operation, and assessment criteria to provide theoretical basis for the formulation and decision-making of DMES planning schemes.First of all, for the requirements of systematic and holistic modeling of DMESs, an unified energy flow model reflecting the interactive relationship of the multi-energy system is established. Using energy flow as the only physical quantity to achieve unified modeling of energy conversion, energy storage, and energy transmission components. And based on the weighted directed graph theory, a static equilibrium relationship model of the system including the network is established. At the same time, in view of the differences in the dynamic processes of electricity, gas and thermal energy transmission, an analog energy storage model is used to reflect the energy flow transmission dynamics and reflect the dynamic state changes of the system, so as to realize the integrated modeling of interaction and flexibility between energy sources.Second, on the basis of the unified energy flow model, considering the coordinated operation of various energy equipment and network constraints, the dynamic process of energy storage equipment and analog energy storage, and the uncertainty of operating scenarios, an optimal configuration model is established with the goal of economy. Using decomposition-coordination method global optimization solution of system planning and operation is achieved. The optimization model proposed in the dissertation starts from the overall interests of the DMES, realizes the coordinated optimization of the system's centralized energy facilities and the distributed energy facilities, makes full use of the flexible operation capacity of the multi-energy coupling system, and effectively promotes the use of renewable energy.Finally, the dissertation focuses on the multiple planning goals of DMESs, considers the impact of the system's operating strategy, and conducts research on the system's energy consumption and value assessment methods. Based on the continuity and additivity of energy flows, the dissertation maps the system operation strategy to path selection, and establishes a fast energy flow and energy loss calculation method. Based on the emergy theory, the dissertation establishes a value evaluation method for MESs, integrates the system energy flow and economic flow, and establishes system renewable energy utilization and environmental impact evaluation methods which provide a basis for the sustainable development of DMES.
