Title: Reconfigurable backstepping control of an interleaved boost converter in photovoltaic systems

Authors: Asma Charaabi; Abdelaziz Zaidi; Nadia Zanzouri

Addresses: Laboratoire d'Analyse, Conception et Commande des Syst`emes (LACS), National School of Engineers of Tunis, El Manar University, Tunis 1240, Tunisia ' Laboratoire d'Analyse, Conception et Commande des Syst`emes (LACS), National School of Engineers of Tunis, El Manar University, Tunis 1240, Tunisia ' Laboratoire d'Analyse, Conception et Commande des Syst`emes (LACS), National School of Engineers of Tunis, El Manar University, Tunis 1240, Tunisia

Abstract: Renewable energy sources need to be reliable to continuously deliver electrical energy, even in the event of faults. In this context, we propose a reconfigurable fault-tolerant control method using backstepping nonlinear control. This system integrates a solar panel with a three-phase interleaved boost converter, focusing on maintaining operation during phase failures. Our control strategy addresses open-circuit converter faults detected by a Luenberger state observer. A binary residual evaluation identifies the faulty converter stage, prompting a phase shift in PWM control signals to mitigate the faulty phase's effect. This reconfiguration, coupled with an adjustment in switching frequency, reduces ripple levels and component stress. Simulation results in MATLAB/Simulink show system recovery within 20 ms, maintaining performance and ripple levels akin to the original structure. The proposed approach efficiently handles faults, ensuring stable operation and swift system recovery.

Keywords: interleaved boost converter; IBC; backstepping control; BSC; reconfiguration; open-circuit fault.

DOI: 10.1504/IJPEC.2025.149307

International Journal of Power and Energy Conversion, 2025 Vol.16 No.4, pp.411 - 436

Received: 22 Mar 2024
Accepted: 28 Jun 2024
Published online: 24 Oct 2025 *

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