台风天气下配电系统韧性提升策略

Resilience Enhancement Strategy for Power Distribution System under Typhoon Weather

为了降低极端故障给配电系统带来的经济损失,本文提出了一种针对台风天气的配电系统韧性提升策略。采用线路加固以及在潜在故障点安装分布式电源的方式,以最小化停电损失、投资成本为目标,建立了3阶段鲁棒优化模型。第1阶段确定加固线路、加固类型以及对分布式电源进行选址定容,第2阶段以台风对配电系统造成损失最大化来确定故障线路的位置,第3阶段是在这一“最坏情况”下,将切负荷量和投资成本最小化。通过对偶理论使第2、第3阶段的鲁棒模型转换为单层模型,进而设计迭代算法求解整体模型。算例表明,该方法可以有效提升配电系统韧性以应对台风天气灾害。

With the rapidly changing global climate,extreme weather events occur frequently.To reduce the economic loss caused by extreme faults to power distribution system,a resilience enhancement strategy for the power distribution system under typhoon weather is proposed in this paper.A three-stage robust optimization model is established by means of line reinforcement and installing distributed generations(DGs)at the potential fault point,with the goal of minimizing power outage loss and investment cost.At the first stage,the lines to be reinforced and the corresponding reinforcement types are selected,and the location and capacity of DGs are determined.At the second stage,the location of the faulty line is determined by maximizing the damage cost caused by typhoon to the power distribution system,which is termed as the“worst case”.At the third stage,the load shedding cost in the“worst case”is minimized.Through the duality theory,the robust models at the second and third stages are transformed into a single-level model,and then an iterative algorithm is designed to solve the overall model.The results of a case study show that the proposed method can effectively enhance the resilience of the power distribution system against typhoon weather disasters.