综合能源背景下的配电网多场景规划

随着能源利用设备的发展，综合能源系统成为能源供应的一个重要发展方向。与单一形式的能源供应相比，综合能源供应系统可以为用户提供更加经济、高效、多样化的能源供应。其中，包含冷热电联产机组(CCHP)、电制冷等设备的配电网是综合能源系统的主要物理载体。基于此，提出考虑新能源、电、热、冷负荷不确定性的综合能源系统设备和配电网变电站容量协同规划的多场景规划方法，实现电、气、热能源的高效、可靠供应。首先，根据CCHP机组、电制冷装置、燃气热水锅炉的物理特性，建立相应能量转化的数学模型。考虑综合能源系统中诸多元件对配电网节点电压的影响，采用Distflow模型建立交流潮流模型。其次，针对新能源出力和电、气、热负荷需求的不确定性对规划结果的影响，采用典型场景来描述电、气、热负荷的季节特性和新能源出力的波动性，进而建立基于多场景的综合能源系统和配电网协同规划模型。对改造的IEEE 33节点配电网系统进行规划计算，算例结果验证了所提规划方法的有效性及合理性。

Multi-Scenario Planning of Distribution Network inthe Context of Integrated Energy

With the development of energy utilization equipment,integrated energy system has become an important development direction for energy supply.Compared to the single form of energy supplies,the integrated energy supply system can provide users with a more economical,efficient,and diversified energy supplies,in which the distribution network that includes combined cooling heating and power(CCHP)units,electric refrigerators and other equipment is the main physical carrier.Based on this,we propose a multi-scenario planning method for coordinated planning of integrated energy system equipment and distribution network substation capacities with consideration of the uncertainties of new energy and the electricity,heat and cooling loads,to achieve efficient and reliable electricity,gas and heat supply.Firstly,according to the physical characteristics of CCHP units,electric refrigeration equipment and gas-fired boilers,a mathematical model for corresponding energy conversion is established.Considering the influence of numerous components in the integrated energy system on the node voltage of distribution network,the Distflow model is used to establish a AC power flow model.Secondly,in view of the impact of the uncertainties of renewable energy output and demand of electricity,gas and heat loads on the planning results,typical scenarios are used to describe the seasonal characteristics of electricity,gas,and heat loads,and the fluctuation of renewable energy output.Finally,a multi-scenario collaborative planning model for integrated energy system and distribution network is developed.The proposed model is tested on a reconstructed IEEE 33-node power distribution network system,and the results of the case study have verified the effectiveness and rationality of the proposed planning method.