综合能源系统对提高社会能源利用效率、促进可再生能源规模化开发、提高社会基础设施利用率、提高能源供应安全和实现我国节能减排目标都具有重要意义，已成为国际能源领域重要的战略研究方向。但其通用建模和安全分析理论的缺失，已成为其推广应用的严重障碍，本项目希望通过深入研究来破解这一难题，主要研究包括：1）通过在原有模型中增加反映能源网和终端能源单元动态的环节，形成描述综合能源系统的扩展Energy Hub (EEHM)通用模型，并提供实用构建方法；2）基于EEHM模型，形成可科学描述综合能源系统动态运行规律的综合仿真理论与仿真方法；3）在科学考虑EEHM模型中偏微分动态和时滞环节影响基础上，构建综合能源系统安全稳定性和运行优化理论；4）将研究成果在实际系统中加以应用。通过本项目研究，希望建立起综合能源系统的通用建模、综合仿真、安全性分析与运行优化的系统理论，为其大范围推广应用提供理论支持和技术保障。

Integrated energy system (IES) includes energy grid and terminal multi-energy units. It is an important technique with many good prospects and has been paid much more attention in the global energy fields, since it can improve the traditional and sustainable energy efficiency, boost the renewable energy development, increase the efficiency of society utilities, improve the stability of energy supply, etc. However, it can not be widely applied today because there is not suitable unique modeling and stability analysis theory. We will try to solve this problem in this project. And, the following works will be carried on: 1. Dynamic components will be added to the traditional energy hub model so as to expand it to a unique model suitable for IES system. The new model is called extended energy hub model (EEHM). It can properly describe dynamics of the energy grid and terminal multi-energy unit of IES system. EEHM modeling theory and determining method will be explored and provided by this project. 2. Based on EEHM model, IES's digital and physical simulation theory will be provided. And, practical simulation algorithms and program will be developed so that it can be used to explore the operational mechanism of IES system. 3. Theory of IES's security/stability analysis and operational optimization will be built. And, the key point is to properly consider the influence of the partial differential dynamic parts and time-delayed parts in the EEHM model. 4. Theoretical results of this project should be validated and improved through experiment or practical applications. Aim of this project is to provide a whole solution to such problems of IES system, including unique modeling, simulation methodology, security/stability analysis and operational optimization. Research of this project is helpful to improve the technique of integrated energy system and to boost its application.