Impact of customer scattering on distribution system reliability with distributed generation

This paper proposes the impact of customer scattering on reliability level of distribution system with distributed generation (DG). Variations of customer scattering are formed into six cases. Each customer scattering case is analyzed for finding the reliability indices of the system when there is no DG, and when DG unit is installed at various locations along the feeder. In addition, the algorithm for restoration time assessment of load point is presented when DG unit is installed. The reliability of distribution system is presented in reliability indices that include SAIFI, SAIDI, CAIDI, ENS and AENS. The proposed algorithm is tested on a simple radial system with 9 load points. The results when DG is installed at various locations for variations of customer scattering are shown and compared with those of the system without DG. The results show that the customer scattering and restoration time effect the optimal location of DG unit in terms of system reliability.