Mitigation of Transient Oscillations in DC-DC Buck Converter via a PI Based Control Strategy

Md Rezanul Haque; Leonardo Callegaro; Sunny Gao; Md. Enamul Haque; Md. Abdur Razzak; Amanullah Maung Than Oo; Foad Taghizadeh

doi:10.1049/pel2.70293

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Mitigation of Transient Oscillations in DC-DC Buck Converter via a PI Based Control Strategy

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Mitigation of Transient Oscillations in DC-DC Buck Converter via a PI Based Control Strategy

Md Rezanul Haque, Leonardo Callegaro, Sunny Gao, Md. Enamul Haque, Md. Abdur Razzak, Amanullah Maung Than Oo and Foad Taghizadeh

IET Power Electronics, Vol.19, pp.1-12

2026

DOI: https://doi.org/10.1049/pel2.70293

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Abstract

Frequent turn-on, turn-off and output reference changes in power electronic converters-common in coordinated systems-can induce significant input and output voltage and current oscillations, even when controllers are well tuned. These oscillations become more pronounced under weak DC-bus conditions, degrading overall performance. Although advanced nonlinear and predictive controllers can mitigate such effects, they are typically complex and computationally intensive. This paper proposes an enhancement to a conventional proportional-integral (PI)-based control strategy to improve dynamic performance by reducing overshoot and undershoot during transient conditions without modifying the original PI gains. The proposed method employs a novel algorithm to generate an adaptively smoothed reference voltage, which is then processed by the PI controller. The approach demonstrates robust and consistent performance across varying PI configurations. Experimental results confirm suppression of critical input current transient deviations by up to 94.8% and improvement in input transient convergence by approximately 57.3%-67.6%, validating its effectiveness under practical operating conditions.

Details

Title: Mitigation of Transient Oscillations in DC-DC Buck Converter via a PI Based Control Strategy
Authors: Md Rezanul Haque - Macquarie University
Leonardo Callegaro - Macquarie University
Sunny Gao - Macquarie University
Md. Enamul Haque - Deakin University
Md. Abdur Razzak - University of Dhaka
Amanullah Maung Than Oo - University of the Sunshine Coast
Foad Taghizadeh (Corresponding Author) - Macquarie University
Publication details: IET Power Electronics, Vol.19, pp.1-12
Publisher: The Institution of Engineering and Technology
Date published: 2026
DOI: 10.1049/pel2.70293
ISSN: 1755-4543
Copyright note: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2026 The Author(s). IET Power Electronics published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology
Data Availability: This study is based on simulated and laboratory data. Further details are available from the corresponding author upon request.
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 991250588402621
Output Type: Journal article

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