Implementation of a novel direct current control strategy for grid connected converter
by Ahmad Ammar Naassani; Mohamed Wissem Naouar; Ahmad Deya Sukary; Mohamad Assi; Eric Monmasson
International Journal of Powertrains (IJPT), Vol. 13, No. 4, 2024

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.

Online publication date: Mon, 17-Feb-2025

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