Fault Recovery of AC/DC Hybrid Distribution Network Considering Load Demand Response and VSC Control Mode

In this paper, we aim to improve the efficiency and reliability of fault recovery in AC/DC hybrid systems. Considering the stochastic nature of distributed power sources such as wind and photovoltaic and loads, as well as the role of VSC in AC/DC hybrid system fault recovery, an AC/DC hybrid distribution network model is constructed. This model incorporates a combined system of wind, photovoltaic and storage, along with controllable loads that consider demand response. After the occurrence of a fault, the important load is first restored by changing the VSC control mode and utilizing the joint system output to form an island. Then, a binary ant lion optimization algorithm incorporating disturbance factors and chaotic mapping is employed to obtain a comprehensive recovery strategy that takes into account the VSC control method and the uncertainties associated with wind, photovoltaic, and load demand response.Finally, a 49-node AC/DC hybrid distribution network is selected for case study. The simulation results indicate that the proposed strategy enables rapid acquisition of fault recovery plans for AC/DC hybrid distribution networks at different moments, verifying the superiority of the proposed recovery strategy.