兼顾经济性和多阶段抗灾性能的骨干网架多目标规划方法

Multi-Objective Planning Method for Backbone Grid Considering Economy and Multi-Stage Anti-Disaster Performance

构建具备抗灾性能的电网骨干网架可以减少台风等极端自然灾害对电力系统造成的破坏和损失。在此背景下,提出一种兼顾经济性和多阶段抗灾性能的骨干网架多目标规划方法。首先,以骨干网架规划经济性、生存性、抗毁性和可恢复性为多目标函数,考虑网络连通性约束、重要节点和支路保留约束以及系统安全运行约束,构建骨干网架多目标规划模型;然后,运用嵌入图论修复策略的改进非支配排序遗传算法对所提模型求解得到骨干网架规划策略的Pareto最优解集;接着,运用熵权法从骨干网架Pareto最优解集中筛选出骨干网架规划策略的Pareto最优折中解;最后,以某区域实际输电网为算例验证了所提模型的有效性。

The backbone grid with anti-disaster performance can reduce the damage and loss of power systems caused by extreme natural disasters such as typhoons.In this paper,a multi-objective planning method for backbone grid considering economy and multi-stage anti-disaster performance is proposed.First,the economy,survivability,invulnerability and recoverability of backbone grid are taken as multi-objective functions;the constraints,such as network connectivity,important nodes and lines reservation and safe operation are considered to construct the multi-objective planning mode for backbone grid.Next,the improved non-dominated sorting genetic algorithm(NSGA-Ⅱ)embedded in graph theory restoration strategy is utilized to solve the proposed model,and the Pareto optimal solution set of backbone grid planning strategies is obtained.Then,the entropy weight method is utilized to select the Pareto optimal compromise solution from the Pareto optimal solution set.Finally,the effectiveness of the proposed model is verified by the case study based on an actual regional transmission network.