Modeling of power distribution feeder and analysis of small PV plant penetration in Kerala low voltage distribution system

Photo Voltaic plant interconnection to grid is increasing day by day. Major share of them are single phase small plants connected at distribution level by domestic consumers. Distribution system is inherently in phase unbalance due to single phase loads. Domestic load during daytime is low. Higher penetration of single phase PV plants in low voltage feeder needs proper analysis. The modeling of exact state of distribution feeder is not easy. A more realistic model is attempted by parameter approximation. Effects of improper joints, section fuses, etc are accounted using voltage regulation data. A real feeder of Kerala State Electricity Board is considered. OpenDSS software tool is used for the analysis. The voltage profile, phase unbalance, line loss and voltage spread along the feeder are presented. This will help the planning and management of power distribution system.