Augmentation of distribution network capacity through integration of PV and ES

Integration of the renewable source in the distribution network under varying load profile is a daunting task. This paper presents the PV system with battery energy storage to improve the distribution network utilization. The load profile of the distribution systems demands the reactive/real power support to maintain the voltage profile and better efficiency in the power utilization. The addition, instantaneous injectable real/reactive power is made available through PV and battery energy storage through D-STATCOM interface. Always power from renewable source availability and load demand in the distribution network are mismatching. The intermittent energy storage with batteries not only resolves this mismatching but also supports the operational efficacy of distribution infrastructure. This operation is proposed through control algorithm based on the battery capacity support in real/reactive power demand by the load. This ensures the negligible reactive power from the source under near unity power factor operation of the distribution feeder. This relief provides the additional capacity availability on the existing distribution network. This improvement in the utilization justifies the investment on the batteries. The typical distribution operation under different operating conditions is simulated with the proposed control scheme. The results are verified with its cost analysis on urban feeder.