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Model predictive control based on single-phase shift modulation for triple active bridge DC-DC converter.

Ahmed Hamed Ahmed Adam1, Jiawei Chen1, Minghan Xu1

  • 1School of Automation, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, 400044, China.

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|December 5, 2024
PubMed
Summary

A new model predictive control (MPC) strategy enhances triple-active bridge (TAB) converter performance. This advanced control ensures precise DC voltage regulation and effective port power decoupling for improved efficiency.

Keywords:
Cost functionKarush-Kuhn-TuckerModel predictive controlSingle-phase shift modulationTriple active bridgeTyphoon real-time simulation device HIL 602

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Control Systems

Background:

  • Triple-active bridge (TAB) converters offer high efficiency and power density.
  • Controller design for TAB converters is challenging due to high-frequency transformer coupling.
  • Existing control methods struggle with precise voltage regulation and port decoupling.

Purpose of the Study:

  • To develop a model predictive control (MPC) strategy for TAB converters.
  • To improve transient performance, control flexibility, and precision in TAB converters.
  • To achieve robust DC voltage regulation and optimal port decoupling.

Main Methods:

  • Implementation of a single-phase shift modulation-based MPC for the TAB converter.
  • Utilization of a cost function for robust voltage regulation.
  • Development of a Karush-Kuhn-Tucker (KKT) conditions-based algorithm for closed-form optimal control solutions.

Main Results:

  • The proposed MPC demonstrates improved transient performance and control precision.
  • Hardware-in-loop (HIL) experiments validate the effectiveness of the MPC strategy.
  • The method achieves faster dynamic characteristics and effective port power decoupling.

Conclusions:

  • The developed MPC approach provides a robust and effective control solution for TAB converters.
  • The strategy ensures reliable DC voltage regulation and efficient port power decoupling.
  • The findings confirm the superiority of the proposed MPC compared to previous methods.