A Method for Enhancing the Resilience of Active Distribution Networks Based on Island Generation

In the past two decades, the frequency of typhoon disasters has gradually increased, causing severe impacts on the operation of distribution networks. This paper proposes a method for enhancing the resilience of active distribution networks based on island generation. Firstly, by utilizing the flexible switches and standby interconnection lines of the distribution network for network reconfiguration, it divides the network into several islands centered around distributed energy resources and energy storage systems. It also uses the affiliation between nodes and specific islands to map to the circuit's on/off status, ensuring the radial topology of the generated island areas. Secondly, it comprehensively dispatches distributed power sources and energy storage components within the region to maintain the normal operation of the distribution network during disasters, minimizing load shedding and reducing network losses. Lastly, considering the uncertainty of distributed power source outputs, the model is formulated as an uncertain mixed-integer linear programming problem. It was simulated and validated in the IEEE 33-node standard distribution system, and then the economic losses of the distribution network under different disaster scenarios were compared.