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<p>Energy-fed DC electronic load (EFDCEL) can feed battery energy back to the grid, significantly improving the efficiency of battery testing equipment. In this paper, a third-order active disturbance rejection controller (ADRC) with impedance reshaping is designed for the AC/DC converter, while a linear ADRC (LADRC) controller is adopted for the DC/DC converter. This system demonstrates excellent disturbance rejection capability and low current distortion. First, the controller is designed based on a mathematical model of the system, and the system stability is verified using the Routh-Hurwitz criterion. Then, MATLAB/Simulink was used to validate the effectiveness of the control strategy. Simulation results show that the proposed control strategy significantly enhances the robustness and power quality of the system. Finally, a 150&#xa0;kW high-power EFDCEL prototype was developed, and experimental tests confirm the correctness of the control strategy. Test results show that the energy feedback efficiency exceeds 95.0%, the current distortion rate is only 1%, and the current ripple is less than 3%, which closely matches the simulation results.</p>

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150 kW energy-fed DC electronic load adopting controller of impedance reshaping and linear ADRC for battery power systems

  • 期刊论文

  • 发表日期：

    2026年5月4日

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  • Chenyang Liu,
  • Tiantian Gao,
  • Guangning Wang,
  • Zhiji Zhou

摘要

Energy-fed DC electronic load (EFDCEL) can feed battery energy back to the grid, significantly improving the efficiency of battery testing equipment. In this paper, a third-order active disturbance rejection controller (ADRC) with impedance reshaping is designed for the AC/DC converter, while a linear ADRC (LADRC) controller is adopted for the DC/DC converter. This system demonstrates excellent disturbance rejection capability and low current distortion. First, the controller is designed based on a mathematical model of the system, and the system stability is verified using the Routh-Hurwitz criterion. Then, MATLAB/Simulink was used to validate the effectiveness of the control strategy. Simulation results show that the proposed control strategy significantly enhances the robustness and power quality of the system. Finally, a 150 kW high-power EFDCEL prototype was developed, and experimental tests confirm the correctness of the control strategy. Test results show that the energy feedback efficiency exceeds 95.0%, the current distortion rate is only 1%, and the current ripple is less than 3%, which closely matches the simulation results.