Multiagent Time-Delayed Fast Consensus Design for Distributed Battery Energy Storage Systems

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Abstract
This paper proposes a novel distributed control architecture for synchronization of the active/reactive power sharing, energy levels, frequency/voltage of distributed Battery Energy Storage Systems (BESSs) using inter-BESS communications. The local information of each BESS is exchanged with a few other neighboring BESSs to achieve a consensus. The consensus speed is significantly improved by introducing an inner control loop for energy levels. The droop frequency/voltage control is also added to regulate the active/reactive power sharing and the frequency/voltage of BESSs. Furthermore, self delays and communication delays are explicitly considered in the design. As a result, the derived consensus algorithms are fully distributed with fast consensus speed in both contexts of non-existence and existence of time delays, which have not been addressed in the existing research for BESSs. To validate the design, several simulation case studies are carried out.

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