计及电-气双向耦合的综合能源配电网优化重构

摘要：综合能源系统是实现电网、气网以及热网等多种能源系统深度融合，利用能量耦合互补等优势提升整个系统能源利用效率的有效形式。为提升综合能源系统优化运行能力，本文首先基于电转气技术与天然气发电技术，构建了的电-气双向耦合综合能源系统总体模型。进而考虑配电网重构技术（Distribution Network Reconfiguration Technology,DNR）中拓扑结构灵活可控这一特性，在配电子系统中引入开关变量、系统运行总费用最低这一目标函数及网络辐射状拓扑结构等约束，建立了配电子系统重构模型。从降低模型求解复杂性的角度，应用二阶锥松弛、乘积变量线性化及分段线性化等方法，将原始综合能源配电网重构非凸非线性模型转化为混合整数二阶锥规划（Mixed integer second-order cone programming，MISOCP）问题求解。仿真结果表明，在电-气双向耦合的综合能源系统中应用配电网重构技术，能够降低综合能源系统运行费用，同时有效支撑了配电子系统电压与配气子系统气压。

Considering the reconfiguration and optimized operation of the electricity-gas two-way coupling integrated energy system network

Abstract: Integrated energy system is an effective way to achieve deep integration of multiple energy systems such as power grids, gas grids, and heating grids, and use the advantages of energy coupling and interconnection to improve the energy efficiency of the entire system. In order to improve the optimal operation capability of the integrated energy system, this paper firstly builds an overall model of the electricity-gas two-way coupling integrated energy system based on the electricity-to-gas technology and natural gas power generation technology. Furthermore, considering the characteristics of flexible and controllable topology in Distribution Network Reconfiguration(DNR) technology, the objective function of introducing switch variables and the lowest total system operating cost in the distribution subsystem and the radial topology of the network with equal constraints, a reconfiguration model of the power distribution subsystem is established. From the perspective of reducing the complexity of solving the model, using methods such as second-order cone relaxation, product variable linearization and piecewise linearization, the original integrated energy distribution network reconstruction non-convex nonlinear model is transformed into a mixed-integer second-order cone programming (MISOCP) problem. The simulation results show that the application of power distribution network reconfiguration technology in the integrated energy system with two-way coupling of electricity and gas can reduce the operating cost of the integrated energy system and effectively support the voltage of the power distribution subsystem and the air pressure of the gas distribution subsystem.