A Chronological Sensitivity-based Approach for BESSs Placement in Unbalanced Distribution Feeders

Abstract

The battery energy storage systems (BESSs) can support the distribution feeders by load-shifting and voltage regulation. Their capabilities can be fully employed by properly placing them within the feeders. Existing strategies mostly employ injection-based sensitivity analysis to improve the computation speed; however, they cannot fully consider the discharging impacts of BESSs, and tend to yield less cost-effective solutions. This paper proposes a sequential placement strategy for BESS placement in unbalanced distribution feeders, and takes into account the impact of time-varying load and renewable profiles. The developed technique aims at minimizing the primary investment and operation/maintenance costs of BESSs whilst maximizing the savings of the network operator in terms of loss and peak demand reduction. The performance of the developed technique is validated by detailed numerical analyses on a real distribution network.