Title: Predictive direct power control of three-phase three-level four-leg unified power quality conditioner

Authors: Mansour Bouzidi; Said Barkat

Addresses: Department of Electronics and Communications, University of Kasdi Merbah, Ouargla 30000, Algeria ' Electrical Engineering Laboratory, University of M'sila, M'sila 28000, Algeria

Abstract: In this paper, a predictive direct power control for three-phase three-level four-leg unified power quality conditioner (UPQC) has been proposed. The proposed three-level four-leg UPQC is capable of simultaneous compensation for supply voltage and load current disturbances. The predictive active and reactive power controllers were synthesised using a new predictive model of four-leg UPQC. In addition, a new algorithm of three-level three-dimensional space vector modulation (3DSVM) was proposed to control a three-level four-leg inverter. The idea is to perform the different steps of 3DSVM in only one sector. Furthermore, the voltage-balancing control of common DC capacitors was achieved by controlling the shunt converter using a three-level 3DSVM equipped by a balancing strategy. Finally, the proposed control method of the three-level four-leg UPQC was verified and compared with direct power control (DPC) through simulation using MATLAB/Simulink under different operating conditions.

Keywords: direct power control; DPC; four-wire unified power quality conditioner; power quality enhancement; predictive direct power control; three-dimensional space vector modulation; 3DSVM; three-level four-leg inverter.

DOI: 10.1504/IJPELEC.2021.118520

International Journal of Power Electronics, 2021 Vol.14 No.4, pp.446 - 469

Received: 15 Nov 2018
Accepted: 02 Jul 2019
Published online: 28 Oct 2021 *

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