Title: Implementation of a novel direct current control strategy for grid connected converter

Authors: Ahmad Ammar Naassani; Mohamed Wissem Naouar; Ahmad Deya Sukary; Mohamad Assi; Eric Monmasson

Addresses: Department of Electrical Drives, Faculty of Electrical and Electronic Engineering, University of Aleppo, Syria ' LR11ES15 Laboratoire des Systèmes Electriques, Ecole Nationale d'Ingénieurs de Tunis, Université de Tunis El Manar, 1002, Tunis, Tunisia; Department of Electronics Design (EKS), Mid Sweden University, 85170, Sundsvall, Sweden ' Department of Electrical Drives, Faculty of Electrical and Electronic Engineering, University of Aleppo, Syria ' Department of Electrical Drives, Faculty of Electrical and Electronic Engineering, University of Aleppo, Syria ' SATIE Laboratory, CY Cergy-Paris University, 95000 Cergy-Pontoise, France

Abstract: This paper is an attempt to synthesise a novel direct current control strategy using sliding mode theory. The choice of the sliding mode theory has been motivated by the presence of switches in the grid connected converter (GcC). The considered control strategy is aimed to control the grid current vector in the d-q reference frame. For that, two switching functions linked to the d-q components of the grid current vector were defined. These switching functions were used to deduce rules that allow an appropriate selection of the GcC voltage vector for the control of the grid current vector during full and low loads, during transients and during steady state operation. Simulation and experimental results were carried out and compared with the results of a three-phase two-level hysteresis controller. The obtained results confirmed that the proposed control strategy decreases the switching frequency and decreases the total harmonic distortion factor THD of the grid currents. Also, the DC-link voltage fluctuations during severe and sudden change of the transferred active power are reduced.

Keywords: grid connected converter; direct current control; direct power control; sliding mode control theory.

DOI: 10.1504/IJPT.2024.144521

International Journal of Powertrains, 2024 Vol.13 No.4, pp.417 - 434

Received: 08 Jul 2023
Accepted: 10 Oct 2024
Published online: 17 Feb 2025 *

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