Predictive direct power control of three-phase three-level four-leg unified power quality conditioner Online publication date: Thu, 28-Oct-2021
by Mansour Bouzidi; Said Barkat
International Journal of Power Electronics (IJPELEC), Vol. 14, No. 4, 2021
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.
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