考虑状态相似性的洪涝灾害下城市配电网韧性在线评估方法OA

With the increasing occurrence of urban flood disasters,the safe operation of distribution networks faces se⁃vere challenges.Aimed at the need for online resilience assessment under the time-varying evolution of rainfall,inunda⁃tion,and equipment failure risks during disasters,an online resilience assessment method for urban distribution net⁃works under flood disasters considering state similarity is proposed.Taking the expected system load loss as the evalua⁃tion metric,an integrated assessment framework is developed by incorporating urban flood dynamic simulation,inunda⁃tion-equipment coupled failure modeling,and fast resilience computation.To tackle the heavy computational burden of minimum load loss calculations under massive fault states,a state similarity-based approach is introduced,which trans⁃forms most optimization computations into linear equation solving,thereby significantly improving computational effi⁃ciency.The proposed method is validated on a typical distribution network in Erqi District,Zhengzhou,during the"7·20"extreme flood event.Results demonstrate that the method can effectively capture the resilience evolution during disaster processes while reducing computation time without compromising accuracy,providing support for flood disaster defense and emergency decision-making.