CARRIER SYNCHRONIZATION CONTROL-BASED INVERTER SWITCHING-FREOUENCY CIRCULATING CURRENT SUPPRESSION METHOD

Yang Xingwu; Ye Xing; Zhang Yuhua; Jiang Youhua; Chen Guodong; Song Jinfeng

doi:10.19912/j.0254-0096.tynxb.2024-1475

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 227-233. DOI: 10.19912/j.0254-0096.tynxb.2024-1475

CARRIER SYNCHRONIZATION CONTROL-BASED INVERTER SWITCHING-FREOUENCY CIRCULATING CURRENT SUPPRESSION METHOD

Yang Xingwu¹, Ye Xing¹, Zhang Yuhua¹, Jiang Youhua¹, Chen Guodong², Song Jinfeng²

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Abstract

In a multi-inverter parallel system, carrier desynchronization can trigger high-frequency switching frequency circulating loops, while traditional suppression methods are difficult to achieve basic carrier synchronization. To address this issue, this paper proposes a carrier synchronization control method to suppress switching circulating currents. This method dynamically adjusts the carrier phase compensation based on the magnitude of the switching circulating currents, stopping the adjustment when the circulating current falls below a preset value. The paper first derives the mathematical relationship between the carrier phase difference and the amplitude of the switching circulating currents through Fourier decomposition of the inverter output voltage. Then, the principle of inverter carrier synchronization control is explained in detail. Finally, the effectiveness of the proposed method for suppressing switching circulating currents is verified through simulation and experimentation.

Key words

inverter / carrier / Fourier decomposition / switching frequency / circulating current / phase compensation

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Yang Xingwu, Ye Xing, Zhang Yuhua, Jiang Youhua, Chen Guodong, Song Jinfeng. CARRIER SYNCHRONIZATION CONTROL-BASED INVERTER SWITCHING-FREOUENCY CIRCULATING CURRENT SUPPRESSION METHOD[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 227-233 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1475

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