Title: GWO-based direct power control with improved LCL filter design for three-phase inverters

Authors: Mohamed Amine Djema; Mohamed Boudour; Kodjo Agbossou; Alben Cardenas; Mamadou Lamine Doumbia

Addresses: Laboratory of Electrical Industrial System (LSEI), University of Science and Technology Houari Boumedienne, Algiers, Algeria ' Laboratory of Electrical Industrial System (LSEI), University of Science and Technology Houari Boumedienne, Algiers, Algeria ' Department of Electrical and Computer Engineering, Hydrogen Research Institute, Université du Québec à Trois-Rivières, Canada ' Department of Electrical and Computer Engineering, Hydrogen Research Institute, Université du Québec à Trois-Rivières, Canada ' Department of Electrical and Computer Engineering, Hydrogen Research Institute, Université du Québec à Trois-Rivières, Canada

Abstract: This paper presents a direct power control (DPC) technique based on instantaneous power theory with optimised PI controllers using a grey wolf optimiser (GWO) algorithm. The method allows to control active and reactive power and to improve the generated power quality. Double second-order generalised integrator with frequency-locked loop (DSOGI-FLL) is performed to ensure the grid synchronisation. New objective functions were defined and the optimisation process is carried using the grey wolf optimiser. A three-phase inverter based grid-connected system was investigated for the simulation. The superiority of the new method was proven by analysing of the different operating modes and conducting a comparative study.

Keywords: microgrid; LCL filter design; grid synchronisation; power quality; grey wolf optimiser; GWO; direct power control; DPC.

DOI: 10.1504/IJDSSS.2021.112791

International Journal of Digital Signals and Smart Systems, 2021 Vol.5 No.1, pp.3 - 19

Received: 06 Apr 2019
Accepted: 08 Nov 2019
Published online: 03 Feb 2021 *

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