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Virtual Fractional-Order-Inductor Based Second Harmonic Current Suppression Method
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DOI：10.1109/TIE.2023.3314915.png)
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摘要
En 中文
In a two-stage single-phase inverter, the pulsating output power generates a second harmonic current (SHC) at the dc port. Although the conventional virtual-resistor (VR) based control method can suppress the SHC, the SHC reduction performance is limited by its dynamic performance. To address the above issues, based on the unified small-signal model of the dc-dc converter, a virtual fractional-order-inductor (FOI) based control method is proposed in this article to reduce the SHC and improve the system dynamic performance. The order and magnitude of the fractional-order inductor can be modified arbitrarily. A negative order inductor is constructed in this article to reduce the SHC and improve the system dynamic performance. In addition, the proposed virtual FOI-based control method can improve the stability of both dc-dc converter and the cascaded system. The comparison of the proposed fractional-order inductor and conventional VR-based control method is given and the design method of key parameters is presented. Finally, an 800-W two-stage single-phase inverter with the upstream boost converter is fabricated and tested in the laboratory to verify the effectiveness of the proposed control method.
Keyword:
Fractional-order inductor
harmonic current suppression
second harmonic current (SHC)
two-stage single phase inverter
期刊
IF:
7.2
论文数:
1.8W
被引数:
9.8W
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