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ORIGINAL RESEARCH article

Front. Energy Res.
Sec. Sustainable Energy Systems
Volume 12 - 2024 | doi: 10.3389/fenrg.2024.1485269
This article is part of the Research Topic Enabling Ancillary Services in Renewable-Powered Electricity Infrastructure View all articles

Efficient Voltage Control Strategy: Observability Design for Multi-Stage DC-DC Buck Converter

Provisionally accepted
Khalid Albariqi Khalid Albariqi 1Abdullah A. Alhussainy Abdullah A. Alhussainy 2Haneen Bawayan Haneen Bawayan 1Yusuf A. Alturki Yusuf A. Alturki 1Sultan Alghamdi Sultan Alghamdi 1*
  • 1 King Abdulaziz University, Jeddah, Saudi Arabia
  • 2 University of Prince Mugrin, Madinah, Saudi Arabia

The final, formatted version of the article will be published soon.

    This paper emphasizes the significance of implementing an effective control system to enhance the performance of a three-stage DC-DC buck Converter (TDDC). In this paper, we present the development of an observation controller (OC) for TDDC. Average modeling of the DC-DC converter was employed alongside an observer algorithm to design the OC for TDDC. The primary focus is the adoption of an observation topology aimed at enhancing the system's responsiveness under various conditions, including variable input voltages, reference voltage changes, load fluctuations, integration with PV, and charging the battery. This approach ensures improved stability and performance, addressing the dynamic challenges inherent in such systems. A comparative analysis is conducted on two distinct control topologies for the proposed TDDC system: PI and advanced OC. MATLAB Simulink is employed to model and simulate the proposed system. The results demonstrate a reduction in the rise time and settling time of TDDC when OC and PI were implemented, respectively. Additionally, they eliminate the 20% overshoot for the system with the PI controller. With the OC, the output voltage oscillations are minimized from 13% to 2%, as compared to PI. The OC was integrated into TDDC to enhance stability and improve the control loops, particularly the third loop. These improvements make the TDDC with OC suitable for applications in renewable energy systems, microgrids, telecommunications, and electric vehicles, where precise control and stability are essential.

    Keywords: Observability Design, Buck converter, Cascaded Buck, Voltage stability, Voltage control

    Received: 23 Aug 2024; Accepted: 14 Oct 2024.

    Copyright: © 2024 Albariqi, Alhussainy, Bawayan, Alturki and Alghamdi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Sultan Alghamdi, King Abdulaziz University, Jeddah, Saudi Arabia

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.