A Strategy for Improving the Resilience of Fault Distribution Networks Considering the Coordination of Island Operation and Topology Reconstruction

The varying degrees of power outages caused by extreme disasters have posed challenges to the power system's resilience from failures. The participation of various types of distributed power sources and interconnection switches brings possibilities for improving the reliability of power supply in the distribution network after faults, meanwhile, bringing possibilities to enhance the resilience of the distribution network in the face of extreme disaster scenarios. For that reason, a fault recovery strategy for island reconstruction was proposed, which adopts mixed-integer second-order cone planning and utilizes the coordinated operation strategy of island operation and topology reconstruction for the recovery of critical loads. And a comprehensive evaluation index for the resilience of the distribution network after fault recovery was proposed, so as to quantitatively evaluate the resilience through these three aspects: resistance stage, recovery stage, and resilience evaluation. Finally, taking the improved IEEE 33 node distribution system as an example, the effectiveness of the proposed coordination strategy for fault recovery in distribution networks was verified, as well as the resilience evaluation index for resilience evaluation after fault distribution network recovery.