Weibull Distribution Based Reliability Analysis of Radial Distribution System with Aging Effect of Transformer

Reliability is associated with the system’s capability to survive. In the past years, consumer’s expectations have been increased with the development and advancement in modem technologies. They are expecting more quality supply with less cost and fewer failures. Therefore, reliability investigation of the Radial Distribution System (RDS) significantly ensures the service continuity at the consumer’s end. Further, with the age, equipment failure rate also increases, which also increases the failure frequency and interruption cost significantly for consumers. A prediction of the failure rate for proper maintenance scheduling and replacement of old equipment is necessary. To achieve the future recurrence rate of interruption for the transformer in real-time, the Weibull Probability Density Function is used here. In this research work, the frequency of interruption with different time intervals, variable shape parameters having an effect on Expected Interruption Cost (ECOST) and Energy Not Served (ENS) is studied. The applicability of the proposed work is validated on well established Roy Billionton Test System (RBTS).