Fault Restoration Strategy for Multienergy Distribution Systems With Consideration of Resilience Enhancement

Abstract

The traditional methods of improving the resilience of the distribution network have certain limitations, while the integrated energy system makes the grid tightly coupled with other energy systems, providing a new way to improve the resilience of the distribution network. Aiming at the problem of large-scale power outages caused by frequent extreme weather events in recent years, this article proposes a fault recovery strategy for multienergy distribution systems considering enhanced resilience. For the first time, this article considers the load conversion of multienergy forms on the demand side in the process of distribution network restoration. During the period from the occurrence of multiline faults in the distribution network to the fault repaired, this article adopts reconstruction and island division, and cooperates with the multienergy form load conversion on the demand side to reduce the loss of electrical loads. In this article, the calculation example of the modified 69 bus system shows the method adopted in this article reduces the load loss rate by about 30% compared with the traditional scheme, which verifies that load conversion of multienergy forms on the demand side can effectively alleviate the problem of insufficient energy supply when the traditional distributed generation (DG) is used to construct island.