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Distributed direct power sliding-mode control for islanded AC microgrids Alfaro Aragón, Carlos Arturo Guzmán Solà, Ramon García de Vicuña Muñoz de la Nava, José Luis Komurcugil, Hasan Martín Cañadas, María Elena Universitat Politècnica de Catalunya. Doctorat en Enginyeria Electrònica Universitat Politècnica de Catalunya. Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica Universitat Politècnica de Catalunya. SEPIC - Sistemes Electrònics de Potència i de Control Àrees temàtiques de la UPC::Enginyeria elèctrica::Distribució d’energia elèctrica::Xarxes elèctriques Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica Sliding mode control Microgrids (Smart power grids) AC microgrid Distributed control Slidingmode control Voltage and frequency regulation Control en mode lliscant Microxarxes (Xarxes elèctriques intel·ligents) © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The aim of this paper is to develop a novel distributed direct power sliding-mode control for an islanded AC microgrid. This solution replaces the droop mechanism of each inverter with two separate sliding surfaces working as primary/secondary controllers. The design of these surfaces is based on the dynamic model of the active and reactive powers to enhance the robustness against line impedance mismatches. Moreover, a theoretical stability analysis is presented. The main features of this proposed control are: first, regulate the voltage and frequency achieving an accurate active and reactive power sharing; second, achieve stability under a wide range of line impedances; and third provide robustness toward external disturbances, including communication failures. Finally, the experimental results verify the controller performance, the stability with different line impedances, and the robustness against communication partitions. This work was supported by the Ministry of Science, Innovation and Universities of Spain and by the European Regional Development Fund under project RTI2018-100732-B-C22. Peer Reviewed Postprint (author's final draft) 2022-10 Article Alfaro, C. [et al.]. Distributed direct power sliding-mode control for islanded AC microgrids. "IEEE transactions on industrial electronics", Octubre 2022, vol. 69, núm. 10, pp. 9700-9710. 0278-0046 https://hdl.handle.net/2117/360062 10.1109/TIE.2021.3135612 eng https://ieeexplore.ieee.org/abstract/document/9658265 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-100732-B-C22/ES/GESTION Y CONTROL DE MICRORREDES CON VEHICULOS ELECTRICOS Y BATERIAS DE RESPALDO/ Open Access application/pdf Institute of Electrical and Electronics Engineers (IEEE)