Seamless plug-in plug-out enabled fully distributed peer-to-peer control of prosumer-based islanded AC microgrid

Abstract

Recent innovations in microgrids consumers converted into Prosumers (local generator + local load). This paper proposes a fully distributed peer-to-peer (P2P) control strategy for the prosumer-based islanded alternating current (AC) microgrid (MG). Prosumers would be independent to operate as producers or consumers. The proposed scheme uses droop control with each distributed generator (DG) to balance local generation and demand, while gossip communication-based distributed P2P control is employed with each Prosumer to restore voltage and frequency deviations across the MG. The prosumers are synchronised concerning their nearest point of common coupling (PCC) instead of a single PCC to avoid the effective line impedance mismatch among the DGs that causes circulating current flow among the DGs and results in poor reactive power-sharing. A prosumer-based islanded AC MG consisting of three differently rated Prosumers and a common load has been modelled in the MATLAB/Simulink environment and simulated with the Opal-RT 4510 real-time simulator to validate the effectiveness of the proposed study. The captured results and the frequency response analysis shows accurate power-sharing by the prosumer-DGs, seamless strategic or individual plug-in plug-out, and consumer operation of prosumers maintaining the MG's power quality and stability.