面向综合能源供给侧改革的城市配网规划方法

Planning of Urban Distribution Network Considering the Integrated Energy Supply-Side Reform

随着能源与电力领域供给侧改革的推广,以电力为主体并融合天然气、热能和交通等多种能源形式的区域综合能源系统将成为未来城市配网的主要发展趋势。利用能源集线器模型刻画了同时耦合于电力网、天然气网和交通网的终端综合能源单元,利用能源转化特性提出了面向供给侧改革的综合能源供给转化响应策略,并且基于终端综合能源单元和供给转化响应策略提出了兼顾系统建设运行成本、慢充站充电时间效用函数和快充站交通流量效用函数的综合能源城市配网规划方法。最后,以一个由IEEE 14节点配电网络、20节点天然气网络和25节点交通网络耦合而成的区域综合能源系统为例进行仿真分析,验证了该规划方法所采用的充电站双重效用函数可分别保障电动汽车用户的充电时间满意度和充电地点便捷度,所利用的供给转化响应策略能通过调整能源供给结构实现在不改变负荷需求的前提下降低用能成本、优化运行特性的目的,同时所引入的基于终端综合能源单元的规划格局可实现电能、天然气、热能和交通等多元能源形式的统一协调规划,有利于提高系统建设运行的综合效益。

With promotion of supply-side reforms in energy and electricity field, regional integrated energy system comprising electricity, natural gas, heat and transportation will be major trend of future urban distribution networks. In this text, energy hub model is applied to characterize terminal integrated energy unit coupled with power network, natural gas network and traffic network simultaneously. Multi-energy supply conversion response strategy is put forward by making use of energy conversion characteristics. Planning method, considering system construction and operation cost, charging power utility function for slow charging stations and traffic flow benefit function for fast charging stations, is proposed based on terminal integrated energy unit and supply conversion response strategy. Simulation analysis is performed on a regional integrated energy system consisting of IEEE 14-node distribution network, 20-node natural gas network and 25-node traffic network. Results show that two utility functions for charging stations can be used to guarantee satisfaction of charging time and charging site convenience respectively. By adjusting energy supply structure, the proposed supply conversion response strategy can reduce energy costs and optimize operating characteristics without changing load demands. The introduced planning pattern based on terminal integrated energy unit can realize coordinated planning of multiple forms of energy, contributing to higher comprehensive benefit of system construction and operation.