Control Bandwidth Extension Method Based on Phase Margin Compensation for Inverters with Low Carrier Ratio

Qikang Wei; Bangyin Liu; Shanxu Duan

Control Bandwidth Extension Method Based on Phase Margin Compensation for Inverters with Low Carrier Ratio

Qikang Wei

Bangyin Liu

Shanxu Duan

Vol. 18, No. 6, pp. 1760-1770, Nov. 2018

10.6113/JPE.2018.18.6.1760

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Abstract

This paper presents a control bandwidth extension method for inverters with a low carrier ratio. The bandwidth is extended at the price of decreasing the phase margin. Then the phase margin is compensated by introducing an extra leading angle into an inverse Park transformation. The model of the controller with the proposed method is established. The magnitude and phase characteristics are also analyzed. Then the influence on system stability when the leading angle is introduced is analyzed. The proposed method is applied to design an inverter controller with both a large bandwidth and a desired phase margin, and the experimental results verify that the controller performs well in the steady-state and in terms of transient response.

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Cite this article

[IEEE Style]

Q. Wei, B. Liu, S. Duan, "Control Bandwidth Extension Method Based on Phase Margin Compensation for Inverters with Low Carrier Ratio," Journal of Power Electronics, vol. 18, no. 6, pp. 1760-1770, 2018. DOI: 10.6113/JPE.2018.18.6.1760.

[ACM Style]

Qikang Wei, Bangyin Liu, and Shanxu Duan. 2018. Control Bandwidth Extension Method Based on Phase Margin Compensation for Inverters with Low Carrier Ratio. Journal of Power Electronics, 18, 6, (2018), 1760-1770. DOI: 10.6113/JPE.2018.18.6.1760.