极端气象灾害下考虑MESS主动调控的配电网故障恢复策略

针对极端灾害天气下配电网的故障恢复问题，计及极端灾害的时空演变特性，提出了一种利用移动储能(mobile energy storage system, MESS)的灵活性主动参与抑制合环冲击电流，辅助配电网故障恢复的策略。首先，建立了暴风雨等不同气象灾害条件下配电线路的故障率统计模型。其次，将复杂交通网与配电网进行耦合，建立了以最小化MESS调度时空成本的上层预布局模型。然后，分析了MESS出力对冲击电流的影响，以抑制合环冲击电流、最大化负荷恢复率和最小化MESS调度成本为目标，构建了MESS参与网络重构的下层调度模型。最后，在改进的IEEE 123节点系统中进行测试，验证了MESS对配网故障恢复安全性的提升效果。结果表明，采用MESS主动参与调控能够有效应对移动的极端气象灾害引发的配电网动态故障恢复问题，并抑制合解环过程中电流的波动，提升网络重构方案的可行性和增强配电网的韧性。

Distribution network fault recovery strategy considering active control of an MESS in extreme weather

To address the problem of fault recovery of distribution networks in extreme weather, a strategy is proposed of using the flexibility of a mobile energy storage system (MESS) to actively participate in the suppression of loop closing impulse currents. This assists in the fault recovery of distribution network by considering the spatial and temporal evolution characteristics of extreme weather hazards. First, a statistical model is developed for the failure rate of distribution lines in different weathers, such as severe wind and rain storms. Second, complex transportation networks are coupled with the distribution networks, and an upper-level pre-dispatch model is established to minimize the spatial-temporal cost of MESS scheduling. Then, the influence of the MESS output power on impulse current is analyzed, and the lower-layer scheduling model of the MESS participating in network reconfiguration is constructed with the objectives of suppressing the loop closing impulse current, maximizing the load restoration rate, and minimizing the MESS scheduling cost. Finally, the modified IEEE 123-node system is adopted to verify the effectiveness of the MESS in improving the security of distribution network fault recovery. The results show that using the MESS to actively participate in scheduling can effectively cope with the dynamic fault recovery problem of a distribution network caused by extreme hazardous weather movement, and suppress the current fluctuation in the process of loop closing, enhance the feasibility of the network reconfiguration scheme, and strengthen the resilience of the network.