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Resilient Secondary Voltage Control of Islanded Microgrids An ESKBF-Based Distributed Fast Terminal Sliding Mode Control Approach

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Document pages: 12 pages

Abstract: This paper proposes a distributed secondary voltage control method based onextended state Kalman-Bucy filter (ESKBF) and fast terminal sliding mode (FTSM)control for the resilient operation of an islanded microgrid (MG) withinverter-based distributed generations (DGs). To tackle the co-existence ofmultiple uncertainties, a unified modelling framework is proposed to representthe set of different types of disturbances, including parameter perturbation,measurement noise, and immeasurably external variables, by an extended statemethod. Kalman-Bucy filter is then applied to accurately estimate the stateinformation of the extended DG model. In addition, based on the accurateestimation, a fast terminal sliding mode (FTSM) surface with terminalattractors is designed to maintain the system stability and accelerate theconvergence of consensus tracking, which significantly improves the performanceof secondary voltage control under both normal and plug-and-play operation.Finally, case studies are conducted in both MATLAB Simulink and an experimentaltestbed to demonstrate the effectiveness of the proposed method.

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