基于线路加固的配电网网架规划模型

Grid Planning Model for Distribution Network Based on Line Reinforcement

摘要: 为提升配电网应对台风等极端灾害的韧性，本文提出一种基于线路加固的配电网网架规划模型。首先，构建线路加固经济指标与功率可达性指标，分别量化加固成本效益与灾害下关键负荷的供电通达能力；进而采用熵权法确定两指标权重，加权得到线路加固重要度，以此筛选关键加固线路。模型同时考虑电源出力、线路传输功率及频率偏差等运行约束。以某沿海城市配电网为算例，采用线性递减惯性权重粒子群算法求解。结果表明，所提方案较传统方案，受损线路长度减少78.81%，断杆数量减少82.35%，负荷恢复时长由15小时缩短至7小时，功率可达性由56.77%提升至92.64%，验证了模型在提升电网抗灾能力与恢复效率方面的有效性。

Abstract: To enhance the resilience of distribution networks against extreme disasters such as typhoons, this paper proposes a grid planning model based on line reinforcement. Two indices are first constructed: the economic index of line reinforcement and the power accessibility index, which respectively quantify the cost-effectiveness of reinforcement and the power supply accessibility for critical loads under disasters. The entropy weight method is then adopted to determine the weights of these two indices, yielding the reinforcement importance of each line for selecting key lines to be strengthened. The model also incorporates operational constraints including power source output, line transmission capacity, and frequency deviation. A coastal city distribution network is taken as a case study, and the linear decreasing inertia weight particle swarm optimization algorithm is employed for solution. Results show that compared with the traditional scheme, the proposed scheme reduces damaged line length by 78.81% and broken pole count by 82.35%, shortens load recovery time from 15 hours to 7 hours, and improves power accessibility from 56.77% to 92.64%, demonstrating the model’s effectiveness in enhancing disaster resistance and restoration capability.