Estimation of distribution system reliability indices neglecting random interruption duration incorporating effect of distribution generation in standby mode

Usually the reliability performance of distribution systems is assessed based on basic reliability indices at load points i.e. failure rate, average interruption duration and unavailability expressed as interruption duration in hours/year. Now a days the distribution systems contain distribution generations (DG) which affects these reliability indices. Further a certain interruption duration which in fact is a random variable can be neglected. Hence this paper describes a simulation approach for evaluating the basic reliability indices incorporating DG and omitting a random interruption duration. The algorithm has been implemented on a sample test system.