Passivity-based power sharing and voltage regulation in DC microgrids with unactuated buses

In this paper, we propose a novel four-stage distributed controller for a DC microgrid that achieves power sharing and average voltage regulation for the voltages at actuated and unactuated buses. The controller is presented for a DC microgrid comprising multiple distributed generating units (DGUs)...

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Hauptverfasser: Malan, Albertus Johannes, Jané-Soniera, Pol, Strehle, Felix, Hohmann, Sören
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Jané-Soniera, Pol
Strehle, Felix
Hohmann, Sören
description In this paper, we propose a novel four-stage distributed controller for a DC microgrid that achieves power sharing and average voltage regulation for the voltages at actuated and unactuated buses. The controller is presented for a DC microgrid comprising multiple distributed generating units (DGUs) with time-varying actuation states; dynamic RLC lines; nonlinear constant impedance, current and power (ZIP) loads and a time-varying network topology. The controller comprising a nonlinear gain, PI controllers, and two dynamic distributed averaging stages is designed for asymptotic stability. This constitutes first deriving passivity properties for the DC microgrid, along with each of the controller subsystems. Thereafter, design parameters are found through a passivity-based optimisation using the worst-case subsystem properties. The resulting closed-loop is robust against DGU actuation changes, network topology changes, and microgrid parameter changes. The stability and robustness of the proposed control is verified via simulations.
doi_str_mv 10.48550/arxiv.2301.13533
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title Passivity-based power sharing and voltage regulation in DC microgrids with unactuated buses
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