Resilience Enhancement Strategies for Active Distribution Grid Fault Recovery in Collaboration with Dynamic Network Reconfiguration

In recent years, due to climate change, Highly Impact Low Probability (HILP) events have become increasingly frequent. So, making it necessary to enhance the resilience of the power system. With the integration of distributed generation (DG) and a large number of remote- control switches (RCS) into the distribution network (DN), the network can perform emergency reconfiguration after faults occur, thereby restoring critical loads. This paper proposes a dynamic network reconfiguration strategy for fault recovery, specifically designed for the characteristics of “large-scale and long-duration” faults in the distribution network during extreme natural disasters. The strategy involves progressively reconfiguring the distribution network as faulted lines are repaired to minimize losses of critical loads, using a weighted load shedding as a resilience indicator. Illustrating this approach with the IEEE 33-node system as a case study and selecting random fault scenarios, the simulation results demonstrate a substantial enhancement in the supply capacity of the distribution network to critical loads during HILP events, providing valuable insights for enhancing the recovery capability of power systems under extreme disasters.