Reliability Evaluation of AC/DC Hybrid Distribution Network Considering VSC Operation Mode and Fault Recovery Optimization

AC/DC hybrid distribution network can be restored by adjusting the VSC control mode, network reconfiguration and other methods after fault, but the existing reliability evaluation methods do not fully consider the impact of these recovery methods on reliability, which leads to inaccurate evaluation results. To solve this problem, this article first establishes an FMEA table through the traditional FMEA method, and queries the table based on the fault information to determine the network topology after fault isolation; Then adjust the VSC control mode according to the VSC control strategy under different fault conditions; Finally, the power outage time and the number of outages of the load in the system under the fault is solved by the AC/DC hybrid distribution network fault recovery optimization model that takes into account network reconfiguration and island operation. Compared with the existing evaluation methods, the results show that the proposed method fully considers the influence of various fault recovery methods of AC/DC hybrid distribution network on reliability, and can accurately evaluate the reliability of AC/DC hybrid distribution network.