Distributed Control of Inverter-Based Lossy Microgrids for Power Sharing and Frequency Regulation Under Voltage Constraints

摘要

This paper presents a new distributed control framework to coordinateinverter-interfaced distributed energy resources (DERs) in island microgrids.We show that under bounded load uncertainties, the proposed control method cansteer the microgrid to a desired steady state with synchronized inverterfrequency across the network and proportional sharing of both active andreactive powers among the inverters. We also show that such convergence can beachieved while respecting constraints on voltage magnitude and branch angledifferences. The controller is robust under various contingency scenarios,including loss of communication links and failures of DERs. The proposedcontroller is applicable to lossy mesh microgrids with heterogeneous R/Xdistribution lines and reasonable parameter variations. Simulations based onvarious microgrid operation scenarios are also provided to show theeffectiveness of the proposed control method.