CASCADED ACTIVE DISTURBANCE REJECTION VOLTAGE STABILIZING CONTROL OF MICROGRID CONVERTER BASED ON DISTURBANCE DIFFERENTIAL COMPENSATION

Li Jiale; Zhao Hanyu; Qi Mengxin; Cui Haotian; Jin Mengyan; Zhou Xuesong

doi:10.19912/j.0254-0096.tynxb.2025-0735

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (9) : 555-566. DOI: 10.19912/j.0254-0096.tynxb.2025-0735

CASCADED ACTIVE DISTURBANCE REJECTION VOLTAGE STABILIZING CONTROL OF MICROGRID CONVERTER BASED ON DISTURBANCE DIFFERENTIAL COMPENSATION

Li Jiale^1~3, Zhao Hanyu^1~3, Qi Mengxin^1~3, Cui Haotian^1~3, Jin Mengyan^1~3, Zhou Xuesong^1~3

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Abstract

To address the issue of output voltage fluctuations in low-voltage load interface converters of DC microgrids caused by uncertain disturbances, an improved active disturbance rejection control （ADRC） strategy is proposed. This strategy integrates disturbance differential compensation with a cascaded extended state observer （ESO） to more effectively suppress voltage variations. By combining the disturbance differential compensation with the cascaded observer architecture, the proposed method achieves accurate disturbance reconstruction without excessively increasing the observer bandwidth, thereby avoiding system oscillation. Moreover, it alleviates the inherent coupling between tracking performance and disturbance rejection capability. The stability of the proposed control approach was proved based on Lyapunov stability theory. Meanwhile, theoretical analyses on disturbance estimation performance, disturbance rejection performance, coupling characteristics and robustness are carried out to illustrate that the proposed improved control strategy effectively suppresses both internal and external disturbances. Finally, numerical simulations validate the effectiveness and feasibility of the proposed improved control strategy.

Key words

microgrids / Buck converter / disturbance rejection / robust control / active disturbance rejection control

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Li Jiale, Zhao Hanyu, Qi Mengxin, Cui Haotian, Jin Mengyan, Zhou Xuesong. CASCADED ACTIVE DISTURBANCE REJECTION VOLTAGE STABILIZING CONTROL OF MICROGRID CONVERTER BASED ON DISTURBANCE DIFFERENTIAL COMPENSATION[J]. Acta Energiae Solaris Sinica. 2026, 47(9): 555-566 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0735

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