Spatial–Temporal Resilience Assessment of Distribution Systems Under Typhoon Coupled With Rainstorm Events

This article proposes a novel spatial–temporal resilience assessment scheme for the distribution system (DS) to address the issue of overoptimistic and potentially misleading assessment due to the imprecision of a single typhoon wind speed model and the neglect of the coupled impact of typhoon rainstorm. First, a dynamic weighted iterative algorithm (DWIA) is proposed for accurate modeling of the typhoon wind speed, and a DWIA-based equivalent wind speed (EWS) model is further proposed for improving the accuracy of wind speed calculation under the coupling effect of typhoon rainstorm. Then, EWS-based uncertain failure probability models are developed for passive and active components, such as distribution lines, poles, and photovoltaics, and the adverse impacts of typhoon coupled with rainstorm events (TCREs) on the outputs of active components are considered. Furthermore, a set of normalized resilience metrics is defined, and sequential Monte Carlo simulation is adopted to evaluate the DS resilience against the TCRE as it travels inland. Finally, the modified IEEE 33-bus system and the actual distribution system from Southern China affected by the TCRE are both tested and analyzed to validate the effectiveness of the proposed scheme. The numerical results show that the proposed scheme can effectively quantify the adverse impact of the TCRE on the DS, and provide assistance for the proactive resilience control of the DS.