区域综合能源系统接入的配电网扩展规划研究

Research on distribution network expansion planning for regional integrated energy system access

采用目前方法对区域综合能源系统的配电网扩展规划时,忽略分析综合能源系统中各系统的结构和运行特点,导致规划后的配电网污染物排放量高,用电量和用气量高。针对区域综合能源系统,提出配电网扩展规划方法。首先,分析区域综合能源系统结构,构建供热、供冷、供电等模型;然后建立双层优化模型,上层模型的目标为最小化规划总成本,下层模型目标为最大化能源利用率,上、下两层模型分别可扩展规划系统配电网和优化区域综合能源系统。对某个区域综合能源系统接入的配电网的仿真计算结果表明,所提方法规划后的配电网网损率降低至4%~5%,负载均衡率可达90%以上,用电量、用气量以及污染物排放量、负荷功率均得到显著控制。

The current method used for the expansion planning of the distribution network in a regional integrated energy system overlooks the analysis of the structure and operational characteristics of various systems within the integrated energy system.This oversight results in high pollutant emissions,electricity consumption,and gas consumption in the planned distribution network.Aiming at the regional integrated energy system,a planning method for distribution network expansion is proposed.Firstly,the structure of the regional integrated energy system is analyzed while models for heating,cooling,and power supply are constructed.Next,a two-tier optimization model is established where the upper-level model aims to minimize the overall planning cost,and the lower-level model aims to maximize energy utilization efficiency.The upper and lower-tier models can respectively extend the planning of the system distribution network and optimize the regional integrated energy system.The simulation results of a distribution network connected to a regional integrated energy system show that the proposed method results in a reduction of distribution network loss rate to 4%~5%,the load balancing rate reaching more than 90%,and significantly controlled consumption of electricity,gas,pollutant discharge and load power after planning.