Modeling the Resilience of Power Distribution Systems Subjected to Extreme Winds Considering Tree Failures:An Integrated Framework  

作　　者：Guangyang Hou Kanthasamy K.Muraleetharan 

机构地区：[1]School of Civil Engineering and Environmental Science,University of Oklahoma,Norman,OK,73019,USA

出　　处：《International Journal of Disaster Risk Science》2023年第2期194-208,共15页国际灾害风险科学学报（英文版）

基　　金：supported by the National Science Foundation under Grant No.OIA-1946093。

摘　　要：Overhead electrical power distribution systems(PDS)are very susceptible to extreme wind hazards.Power outages can cause catastrophic consequences,including economic losses,loss of critical services,and disruption to daily life.Therefore,it is very important to model the resilience of PDS against extreme winds to support disaster planning.While several frameworks currently exist to assess the resilience of PDS subjected to extreme winds,these frameworks do not systematically consider the tree-failure risk.In other words,there is no integrated framework that can simultaneously consider tree failures,PDS component failures induced by falling trees,resilience assessment,and evaluation of resilience enhancement with vegetation management.Therefore,this study proposed an integrated simulation framework to model the resilience of PDS against extreme winds,which includes tree fragility modeling,PDS fragility modeling,PDS component failure estimation,system performance evaluation,system restoration modeling,and resilience enhancement evaluation.The framework is demonstrated with a power distribution network in Oklahoma.The results show that the estimated system resilience will reduce if tree failures are considered.Crown thinning can effectively enhance the system’s resilience,but the effectiveness is affected by both wind speed and direction.

关 键 词：Falling trees FRAGILITY OKLAHOMA Power distribution system Resilience modeling Vegetation management 

分 类 号：TM752[电气工程—电力系统及自动化]