IMPROVEMENT IN RELIABILITY INDICES OF A POWER DISTRIBUTION SYSTEM: A CASE STUDY

M. V. Kesavakumar, V. Srihari, B. Sarvesh

Abstract: Frequent occurrence of failures is common in Electrical Power Distribution Systems. The consequences of failure include high cost of maintenance, undesirable effects and risks which affect the power consumers. The important goals of reliability and maintainability of distribution systems are availability of continuous power and meeting the load requirements. The Power Distribution System at SIPRA Labs (BALANAGAR FACILITY) consists of three phase and single phase loads. In this work Reliability Analysis is conducted for each component like Miniature Circuit Breaker (MCB), Moulded Case Circuit Breaker (MCCB) and other different components by calculating failure rate and repair rate individually on yearly basis. Mean Time To Failure (MTTF), Mean Time To Repair (MTTR), Mean Time Between Failure (MTBF) of the overall system are calculated from failure rate and repair rate of each component. Customer- and Load-Oriented indices of overall Power Distribution System are predicted from load details, failure rate and Unavailability under each feeder line. MATLAB Programming is developed for overall system reliability analysis.

Keywords: Power Distribution System, MCCB & MCB, Repairable and Non-repairable components

DOI: https://doi.org/10.15623/ijret.2015.0424004