Backstepping control of a grid-connected four-leg PWM rectifier under both balanced and unbalanced grid conditions

This study focuses on a backstepping control (BSC) of a three-phase four-leg pulse width modulation (PWM) rectifier under balanced and unbalanced load and grid conditions. The proposed BSC for the three-phase four-leg PWM rectifier (3P-4LR) connected to the grid is build up using three independent b...

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Bibliographic Details
Published in:International journal of system assurance engineering and management 2023-03, Vol.14 (Suppl 1), p.1-18
Main Authors: Chebabhi, Ali, Al-dwa, Ala Addin Mohammed, Barkat, Said, Zebiri, Fouad
Format: Article
Language:English
Subjects:
Direct current
Electric potential
Engineering
Engineering Economics
Inductance
Logistics
Marketing
Organization
Original Article
Power factor
Proportional integral
Pulse duration modulation
Quality Control
Rectifiers
Reliability
Robustness (mathematics)
Safety and Risk
Unbalance
Voltage
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Summary:This study focuses on a backstepping control (BSC) of a three-phase four-leg pulse width modulation (PWM) rectifier under balanced and unbalanced load and grid conditions. The proposed BSC for the three-phase four-leg PWM rectifier (3P-4LR) connected to the grid is build up using three independent backstepping controllers based on Lyabonov theory to control simultaneously DC voltage and input currents. As a result, unit power factor, stable DC-bus voltage, sinusoidal input 3P-4LR currents with a lower harmonic content and lower zero-sequence and natural currents can be accurately achieved. Not only that, robustness against voltage grid fluctuations, load and filter inductance variations can also be carried out. The effectiveness, superiority, good dynamic, and steady-state performances of the proposed BSC based 3P-4LR have been validated by numerical simulations compared to the conventional proportional-integral control under balanced and unbalanced load and grid conditions.
ISSN:0975-6809
0976-4348
DOI:10.1007/s13198-022-01826-8