Distribution system adequacy assessment accounting customer controlled generator sets

This paper describes a probabilistic approach for the adequacy assessment of a distribution system having distribution generator (DG) sets, which are owned and controlled by customers. Markov modeling has been employed to obtain capacity outage table for DG sets. Available capacity of distribution substation has been assumed as continuous random variable. Discrete capacity distribution is added to continuous distribution of substation capacity and merged with hourly peak load for obtaining probability of failure and expected demand not supplied (EDNS) annually with the help of derived closed form relations. The procedure has been illustrated with a case study.

Research highlights► Presented a probabilistic approach for the adequacy assessment of a distribution system. ► Large consumers are encouraged to install their own generating sets. ► Distribution generators are distributed at various locations will enhance the adequacy substantially. ► Customer controlled DG sets with smaller capacities and properly managed, enhance the adequacy. ► This analytical study is useful in planning the capacity and minimum number of DG sets.