CONTROL METHOD OF DC MICROGRID OSCILLATION SUPPRESSION BASED ON RESONANT FILTER AND DUTY CYCLE CALCULATION

Yang Ling; He Qijun; Chen Yiqian; Liao Junhao; Li Yibo; Lian Chenxi

doi:10.19912/j.0254-0096.tynxb.2024-1329

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 499-508. DOI: 10.19912/j.0254-0096.tynxb.2024-1329

CONTROL METHOD OF DC MICROGRID OSCILLATION SUPPRESSION BASED ON RESONANT FILTER AND DUTY CYCLE CALCULATION

Yang Ling, He Qijun, Chen Yiqian, Liao Junhao, Li Yibo, Lian Chenxi

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Abstract

A control method of DC bus oscillation suppression based on duty cycle calculation is proposed in this paper, which is mainly composed of two parts： oscillation current control ring and duty cycle calculation ring, which can effectively extract the main frequency component of oscillation and calculate the required duty cycle, and has a better suppression effect. The small signal impedance analysis of the system shows that the contorl method can effectively reduce the resonant peak of the DC bus and effectively improve the stability of the system. Finally, experiments demonstrate that the method effectively suppresses bus voltage oscillations.

Key words

microgrids / oscillation suppression / small signal analysis / duty cycle calculation

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Yang Ling, He Qijun, Chen Yiqian, Liao Junhao, Li Yibo, Lian Chenxi. CONTROL METHOD OF DC MICROGRID OSCILLATION SUPPRESSION BASED ON RESONANT FILTER AND DUTY CYCLE CALCULATION[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 499-508 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1329

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