中文摘要：

为合理选择高压配电线路载流量以实现高压配电网精细化规划和集约型建设，提出一种基于供电能力分析的高压配电线路容量优化方法。首先定义供电路径矩阵和运行／转供方式向量来描述高压配电网网架信息；然后基于配电网供电能力分析，以使配电网供电能力达到极限的最小高压配电线路容量需求为目标，通过配电网高压网架正常运行分析、高压配电线路N-1校验分析以及高压网架运行／转供方式和转供方式的合环情况分析建立约束，最终形成数学模型；最后提出一种改进的遗传算法对模型进行求解。通过某城区电网实例计算证明了算法的有效性和实用性。

英文摘要：

To reasonably choose current-carrying capacities of HV distribution lines to implement refined planning and intensive construction to select benefiting conductors to reduce invest and increase utilization of supplying equipment, a method to optimize capacity of HV distribution line based on load supply capability analysis is proposed. Firstly, the concepts of power supplying route matrix and operation/wheeling mode vector of main transformer are defined to describe the information of the wireframe of HV distribution network; then based on the analysis of load supply capability of distribution network the minimized demand on capacity of HV distribution line, which makes the load supplying capability of distribution network reaching its limit, is taken as the objective and the constraints are determined through the analysis on normal operation of HV distribution wireframe and N-1 contingency as well as the analysis on operation/wheeling mode and the loop closing of wheeling mode, and then a mathematical model is formed;finally, a modified genetic algorithm is presented and used to solve the proposed optimization model. The effectiveness and practicality of the proposed method are verified by the calculation of a certain urban distribution network.