Active-damping-based active disturbance rejection control for dual-active-bridge DC-DC converter with constant power loads

Zou Yongxi; Xiao Wenxun; Yu Wei; Qiu Dongyuan; Du Guiping

doi:10.11714/acta.snus.ZR20260051

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Active-damping-based active disturbance rejection control for dual-active-bridge DC-DC converter with constant power loads

Research articles | 更新时间：2026-07-24

- Active-damping-based active disturbance rejection control for dual-active-bridge DC-DC converter with constant power loads
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 65, Issue 4, Pages: 59-66(2026)
- 作者机构：
  
  1.华南理工大学电力学院，广东广州 510641
  2.易事特集团股份有限公司，广东东莞 523808
- 作者简介：
- 基金信息：
- DOI：10.11714/acta.snus.ZR20260051
  CLC： TM46
- Received：01 March 2026，
  
  Accepted：07 April 2026，
  
  Online First：14 May 2026，
  
  Published：25 July 2026
- 稿件说明：
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邹咏希,肖文勋,于玮等.带恒功率负载的DAB变换器有源阻尼自抗扰控制[J].中山大学学报(自然科学版)(中英文),2026,65(04):59-66.

Zou Yongxi,Xiao Wenxun,Yu Wei,et al.Active-damping-based active disturbance rejection control for dual-active-bridge DC-DC converter with constant power loads[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2026,65(04):59-66.
邹咏希,肖文勋,于玮等.带恒功率负载的DAB变换器有源阻尼自抗扰控制[J].中山大学学报(自然科学版)(中英文),2026,65(04):59-66. DOI： 10.11714/acta.snus.ZR20260051.

Zou Yongxi,Xiao Wenxun,Yu Wei,et al.Active-damping-based active disturbance rejection control for dual-active-bridge DC-DC converter with constant power loads[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2026,65(04):59-66. DOI： 10.11714/acta.snus.ZR20260051.

摘要

双有源桥（DAB）变换器后接恒功率负载（CPL）时，呈现负阻抗特性，易导致系统奇点进入右半平面，从而出现振荡和不稳定。针对这一问题，本文基于DAB的降阶平均模型和CPL等效模型，提出了一种基于有源阻尼的改进自抗扰控制策略。该方法在DAB输出端设计了并联虚拟导纳以主动补偿CPL的负阻抗特性，并在此基础上对线性扩展状态观测器（LESO）和线性自抗扰控制（LADRC）的结构进行了重构，以达到消除负阻抗带来的负面影响和增强鲁棒性的目的。实验表明，与传统的比例积分控制和LADRC方法相比，所提方案显著消除了输出电压的振荡，缩短了暂态调节时间，提高了系统稳定性。

Abstract

With the advantages of high power density， galvanic isolation， and soft-switching capability， the dual-active-bridge （DAB） DC-DC converter has been widely used in modern DC microgrids and renewable-energy systems. However， when a DAB converter supplies a constant power load （CPL）， the load exhibits negative incremental impedance， which can drive the system poles into the right-half plane， thereby causing oscillations and instability. To address this issue， this paper proposes an active-damping-based improved active disturbance rejection control strategy， developed from the reduced-order averaged model of the DAB converter and the equivalent CPL model. A shunt virtual admittance is designed at the DAB output to actively compensate the negative impedance introduced by the CPL. On this basis， the linear extended state observer （LESO） and the linear active disturbance rejection control （LADRC） structure are reconfigured to simultaneously mitigate the adverse effects of negative impedance and enhance robustness. Experimental results show that， compared with conventional PI control and standard LADRC， the proposed method effectively suppresses output-voltage oscillations， shortens the settling time， and improves system stability.

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references

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