Distributed Noise-Resilient Fixed-Time Consensus Secondary Control for Hybrid Inverter-Based AC/DC Microgrids

Since communication channels of microgrids (MGs) are prone to environmental noises, control signals used in distributed control architecture will be polluted. In this article, these noises in communication channels are addressed in distributed control of MGs. A distributed noise-resilient fixed-time consensus-based secondary control of hybrid inverter-based AC/DC MGs is proposed to achieve autonomous power sharing, frequency synchronization, and voltage restoration simultaneously. One major benefit of the proposed fixed-time control is that the converging time is indeed independent of the initial condition. Thus, the settling time can be elaborately designated off-line according to specification requirements. To demonstrate the effectiveness of the proposed method, simulation studies under MATLAB/Simulink environments of a 6-bus hybrid inverter-based AC/DC MG are performed. Scenarios under load variations, communication channel with additive noise, and plug-and-play operations of distributed generators are investigated. Comparison studies with other variants of distributed consensus control are also investigated to demonstrate the effectiveness of the proposed distributed secondary control.