Voltage Regulation and Current Sharing via Flatness-Based Orthogonal Consensus Control for n Parallel DC-DC Boost Converters

Overview & Synopsis

This paper proposes a novel cooperative control architecture for DC microgrids composed of n parallel-connected boost converters. In conventional flatness-based control, the entire energy regulation effort is typically assigned to a single unit, which may lead to excessive current peaks increasing losses and exposing the system to a higher risk of faults under dynamic operating conditions. To overcome this limitation, the proposed flateness-based approach distributes the regulation task among multiple interacting converters, allowing the power demand to be shared more evenly. A consensus-based coordination mechanism is introduced to ensure that agents collectively achieve the desired operating condition while maintaining proportional current sharing.%This paper proposes a novel distributed control architecture for DC microgrids composed of \(n\) parallel-connected boost converters. In conventional flatness-based control, the entire energy regulation burden is assigned to a single unit, which may lead to actuator saturation under dynamic conditions. To address this limitation, the proposed approach distributes the energy regulation task among multiple collaborative agents. A consensus-based mechanism is introduced to coordinate these agents and ensure proportional current sharing. %Rigorous theoretical analysis, supported by Lyapunov arguments, establishes asymptotic internal stability, exact DC bus voltage regulation, and accurate power sharing among converters. The proposed framework improves transient performance while maintaining control inputs within feasible limits.