Fully distributed control to coordinate charging efficiencies for energy storage systems

Abstract

This study proposes a novel fully distributed coordination control (DCC) strategy to coordinate charging efficiencies of energy storage systems (ESSs). To realize this fully DCC strategy in an active distribution system (ADS) with high penetration of intermittent renewable generation, a two-layer consensus algorithm is proposed and applied. It collects global information in the first layer and achieves pinning-based DCC in the second layer. Basic objectives of the proposed DCC for ESSs are: ① to coordinate the ESSs and improve efficiency using associated marginal charging costs (MCCs) in a fully distributed manner; ② to reduce local power mismatch and power transmission losses; ③ to adapt to unintentional communication topology changes. The effectiveness and adaptability of the proposed DCC approach are both validated by simulation results.