Designing reliability into industrial and commercial power system

One of the failures in a distribution system is due to an increase of load demand which contributes to the unavailability of supply to a customer. This paper presents the application of the simple radial system to evaluate the frequency, average duration of load point interruptions and customer interruption costs being served by various industrial and commercial power system configurations. It is also to determining how the frequency and duration of interruption affected when spare and redundant of the transformer in the system. This method is used for evaluating the capability of the station to supply the power to consumers. There are six different configuration of the industrial power system considered in the analysis of reliability evaluation. The best and the worst configuration of the distribution system can be obtained by referring to the reliability and expected capability output of the cases. The reliability analysis is carry out by considering the effect of lateral distributor protection, effect of protection failures and effect of transferring load. The available literature on this subject generally deals with the failure probabilities. Numerical values are then obtained by further manipulation. This research is very useful to planners toward planning or designing distribution systems considering the most reliable conditions.