A Decentralized Power Management and Sliding Mode Control Strategy for Hybrid AC/DC Microgrids including Renewable Energy Resources

This paper presents a new decentralized robust strategy to improve small and large-signal stability and power-sharing of hybrid AC/DC microgrids and improve its performance for nonlinear and unbalanced loads. In addition to the sliding mode controller for DC/DC converters, for the sake of improving...

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Bibliographic Details
Published inIEEE transactions on industrial informatics p. 1
Main Authors Baghaee, Hamid Reza, Mirsalim, Mojtaba, Gharehpetian, Gevorg B., Talebi, Heidar Ali
Format Journal Article
LanguageEnglish
Published IEEE 2023
Subjects
Distributed Energy Resources
Harmonic analysis
Hybrid AC/DC microgrid
Impedance
Lyapunov Function
Microgrids
Nonlinear and Unbalanced loads
Power harmonic filters
Robustness
Rotors
Sliding Mode Control
Stability
Symmetrical Components
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Summary:This paper presents a new decentralized robust strategy to improve small and large-signal stability and power-sharing of hybrid AC/DC microgrids and improve its performance for nonlinear and unbalanced loads. In addition to the sliding mode controller for DC/DC converters, for the sake of improving power sharing and regulating active and reactive powers injected by distributed energy resources, and moreover, controlling harmonic and negative-sequence current in the presence of nonlinear and unbalanced loads, two separate controllers for positive sequence power control and negative sequence current control are designed based on the sliding mode control and Lyapunov function theory, respectively. The theoretical concept of the proposed robust control strategy, including mathematical modeling of microgrid components, basic theorems, controller design procedure, and robustness and closed loop stability analysis are outlined. Also, this direct power/current/voltage control scheme is governed by a new hybrid AC/DC hierarchical control scheme that exploits a harmonic virtual impedance loop and voltage compensation scheme. To show the effectiveness of the proposed robust control scheme, offline time-domain simulations are done on a hybrid AC/DC wind/photovoltaic/fuel-cell microgrid with nonlinear and unbalanced loads in MATLAB/Simulink environment, and the results are experimentally verified by OPAL-RT real-time digital simulator.
ISSN:1551-3203
1941-0050
DOI:10.1109/TII.2017.2677943