A novel resilience assessment for active distribution networks including a DER voltage regulation scheme considering windstorms

• Published in: International journal of electrical power & energy systems 2023-11, Vol.153, p.109310, Article 109310
• Main Authors: Serrano-Fontova, Alexandre, Liao, Zhiyu, Li, Haiyu, Booth, Campbell
• Format: Article
• Language: English
• Subjects: Active Distribution networks (ADNs); Distributed generation (DG); Resilience
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2023.109310

•A net-zero DN model composed of solely non-dispatchable DGs and BESSs has been considered to tackle severe windstorms.•The proposed framework is particularly effective in DNs with high shares of converter-based DGs.•The proposed three-stage resilience assessment can provide up to 25 percent load shedding reduction.•A detailed spatiotemporal representation of the DN was implemented to accurately estimate the status of the grid. Increasing incidences of extreme weather events pose significant challenges to the electrical grids in terms of the ability to withstand those high-impact eventualities. This paper proposes a resilience assessment framework for net-zero active distribution networks (ADNs) to tackle the impacts of extreme windstorms where only renewable energy resources (RESs) and battery energy storage systems (BESSs) are considered. To accurately capture the influence of windstorms on the grid, a detailed spatiotemporal representation of grid system assets and their exposure to the wind has been implemented. The suggested day-ahead resilience assessment is based on a three-stage approach. The first stage computes the probabilities of failure of each line and determines the most vulnerable ones. The second stage obtains the optimal grid configuration based on the outcomes of the first stage given the available non-dispatchable RESs and commits the available resources in each island to minimize the loss of load during the windstorm. If such a value is still larger than zero after the second stage, a novel voltage regulation scheme is applied in the third stage, taking advantage of the RESs and BESSs in each island. The proposed resilience assessment has been evaluated using the IEEE 33-bus test system with the meteorological data retrieved from an actual windstorm event occurred in the UK on the 20th of February. The outcomes of this paper underscore that a significant reduction in load shedding during such extreme events can be achieved, thus having a notable enhancement to the overall resilience of the system. Finally, the performance of this approach is compared with other resilience-oriented methods for windstorms, where the benefits of using the scheme reported in this paper are highlighted and quantified.