A Two-Stage Resilience Enhancement Strategy for Distribution Networks Considering Extreme Weather Conditions

Background: In the context of increasing extreme weather events and natural disasters, enhancing the resilience and rapid recovery capabilities of distribution networks has become a critical focus in power system research. Objective: Previous studies primarily focused on the post-disaster power restoration phase of distribution networks affected by extreme weather without fully addressing the critical role of mobile energy storage in pre-disaster prevention. To bridge this gap, this paper proposes a two-stage resilience enhancement strategy for distribution networks, incorporating multi-source coordination and network reconfiguration. Methods: This paper presents a two-stage resilience enhancement strategy for distribution networks under extreme weather conditions. This strategy combines the coordinated optimization of various DERs with network reconfiguration. In the pre-disaster stage, optimization is conducted to manage uncertainties in wind and photovoltaic output. A pre-deployment approach for energy storage is introduced, incorporating the coordination of the power grid and transportation network to maximize expected load power recovery and minimize node voltage deviation. In the post-disaster stage, the strategy integrates distributed resources such as photovoltaic systems, wind power, and mobile energy storage. It uses a multi-source coordinated dynamic scheduling method to optimize spatiotemporal energy distribution. Results: The results show that this approach significantly improves post-disaster recovery efficiency. It reduces load shedding and enhances the system's adaptability and disaster resistance. Conclusion: The proposed approach enhances the overall resilience and recovery capacity of the distribution network. This patented technology will be applied in the future.