Reliability assessment of transmission and distribution systems considering repair in adverse weather conditions

Abstract

The physical environment in which a transmission and distribution system resides has a significant impact on the resulting reliability of the network. Many researchers throughout the world believe that extreme adverse weather is becoming more frequent and severe. This paper illustrates a model that can be utilized for the predictive assessment of reliability indices in both adverse and extreme adverse weather conditions. Incorporating the failures that take place in extreme adverse weather calls for different models and techniques. In this paper, analysis is done using three different weather models: the conventional single and two weather state models and a three weather state model. The model presented in the paper incorporates the ability to consider repair in adverse weather and examines the effect of including this in the analysis. The ability to conduct repair during adverse weather conditions has a positive effect on the reliability indices of average system failure rate and average system outage duration.