Research on Power Supply Reliability Enhancement Methods Based on Flexible Interconnection of Distribution Grid Areas

To enhance the disaster resistance and post-disaster recovery capabilities of distribution networks under typhoon disasters, A power supply reliability enhancement method was developed based on flexible interconnection of distribution grid areas. Firstly, a probabilistic model for wind-induced faults is developed based on key typhoon parameters (e.g., path, wind speed, air pressure) and the failure mechanisms of power grid components. Secondly, large-scale random fault samples are generated using Monte Carlo simulation, and representative typical fault modes are extracted via K-means clustering. Finally, a hybrid optimization model integrating simulated annealing and particle swarm optimization (SA-PSO) is introduced to optimize the placement and capacity of Flexible Interconnection of Distribution Grid Areas, thereby maximizing power supply reliability. Case studies conducted on the IEEE 33-node system demonstrate that the optimization of flexible interconnection of distribution grid areas significantly reduces user outage durations and economic losses, showcasing both cost-effectiveness and practicality. This confirms the method’s efficacy and feasibility in typhoon scenarios, providing a robust theoretical foundation and engineering support for enhancing distribution network reliability, with significant potential for broader application.