Fault Recovery Strategy Of AC/DC Hybrid Distribution Network Based On Improved AntLion Optimizer

Abstract

After fault, the AC/DC hybrid distribution network can be recovered by adjusting VSC control mode and network reconfiguration, which improves the reliability and safety of AC/DC hybrid system fault recovery. The traditional method has not considered the influence of island restoration on fault restoration in AC/DC distribution network. In this paper, a fault recovery strategy for AC/DC distribution network is proposed, which is based on the dynamic coordination between isolated island and main network. First of all, when a fault occurs, select an appropriate VSC control mode, and call the energy storage system and distributed power supply in the fault area to restore power to important loads. Then taking the minimum power loss, the minimum network loss and the minimum number of switching actions as the comprehensive objective function, the ant lion Optimizer with the introduction of disturbance factor is used to obtain the comprehensive restoration strategy for the coordination of islands and the main network. Finally, the 49 node AC/DC hybrid distribution network is analyzed, and the results verify the superiority of the restoration strategy