Resilience Improvement Strategy of Distribution Network Based on Network Reconfiguration in Earthquake Disaster Scenario

In recent years, the occurrence of extreme disaster events has caused serious impact on the stable and reliable operation of the power system. Although the probability of such events is small, they often bring great harm. Therefore, it is very necessary to improve the resilience of power system to deal with such small probability and high-risk disaster events. In this paper, the resilience evaluation framework of transmission and distribution system under earthquake disaster is put forward, and the resilience index of power system is measured by the shearing load of the system under fault state. The probability and degree of fault of transmission and distribution system under different earthquake intensity are simulated by earthquake disaster model. Taking IEEE 33 model as an example, three typical fault scenarios are selected, and the optimal load reduction is obtained by using contact switches to reconstruct the distribution network according to different fault locations. The example results show that the proposed method can significantly improve the resilience of the distribution network under earthquake disasters, which provides a reference for improving the resilience performance of the power system under earthquake disasters.