Resilience Assessment of Microgrid Using Complex Network Theory

摘要

Resilience is the capability of a system to survive high impact low probability (HILP) events like natural disasters or man-made hazards, and continually prepares itself to face the changing future. Although the possibility of a complete system collapse cannot be ruled out, however reducing the likelihood of such damage is a viable strategy. In this paper resilience assessment based on complex network architecture concept is illustrated. The damaged microgrid under a severe cyclonic storm can be reorganized using the survived nodes by effectively forming small segments. This holds the system for a longer duration by eliminating any chance of further degradation. This paper identifies critical buses in the 33-bus microgrid using complex network and component availability concepts. Prioritization of crucial nodes improves microgrid resilience to deal with prevailing conditions for a longer duration and improves responsiveness by lowering component recovery duration as well as overall restoration. The different responsiveness measures are compared to analyze the impact of severe cyclones on the microgrid's resilience.