Resilience-Oriented Dynamic Distribution Network With Considering Recovery Ability of Distributed Resources

Abstract

The installation of distributed generations (DGs) and energy storages (ESs) in active distribution networks (DNs) could help to increase the resilience of the system. When large scale power outages of urban areas occur, these distributed resources could be used to recover partial, especially the most important loads. However, the determination of boundaries in the distribution networks and the strategy to recover loads are crucial to the overall DN reliability. This paper proposes a framework for resilient distribution network (RDN) to utilize all dispatchable resources to enhance the recovery ability under severe incidents like the complete failure of a substation. Firstly, the idea of restoration areas (RAs) planning with partial recovery is introduced. Each restoration area is schemed to utilize ES, DG and load transfer (LT) to recover loads as much as possible with considering the load importance. The combination weighting method is applied to evaluate the load priority. After that, a dynamic recovery strategy is designed that is valid regarding the actual operation condition and the reliability requirements in distribution system. The flexible boundaries of the RAs can expand or shrink to deal with the uncertainty of power sources output. Furthermore, the load regulation or demand response (DR) is performed to maintain power balance and enhance the overall recovery rate. Finally, illustrative results on IEEE RBTS test systems verify the effectiveness of the proposed model.