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首页> 外文期刊>Power Electronics, IET >Suppressing low-frequency components of commonmode voltage through reverse injection in three-phase inverter
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Suppressing low-frequency components of commonmode voltage through reverse injection in three-phase inverter

机译：通过反向注入抑制三相逆变器中的共模电压的低频分量

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摘要

The output common-mode voltage (CMV) will bring many negative effects in a three-phase inverter, which is controlled by the sinusoidal pulse-width modulation (SPWM) method. The carrier phase-shift method and the carrierfrequency modulation method can reduce the peaks of the CMV at the switching frequency and its harmonic frequencies, but they may cause increase of the low-frequency (LF) baseband harmonics. A new reverse injection scheme is proposed to suppress the LF harmonics. In this scheme, the parameters of the interference peaks are obtained through CMV detection and real-time harmonic parameters estimation. The estimated phase errors from the detection-control delay are amended by the method of temporary addition of the standard phase signal. Then, the sinusoids with a reverse phase to the LF harmonics are generated and injected in the reference sinusoid of each phase to produce the SPWM. Thus, the LF peaks of the CMV are counteracted. The feasibility and the validity of this scheme are verified through the experiments under different control strategies.
机译：输出共模电压（CMV）将在三相逆变器中带来许多负面影响，该逆变器由正弦脉冲宽度调制（SPWM）方法控制。载波相移方法和载波频率调制方法可以减小CMV在开关频率及其谐波频率处的峰值，但它们可能会导致低频（LF）基带谐波增加。提出了一种新的反向注入方案来抑制低频谐波。在该方案中，通过CMV检测和实时谐波参数估计获得干扰峰的参数。由检测控制延迟估计出的相位误差可以通过临时添加标准相位信号的方法进行修正。然后，产生具有与LF谐波相反的相位的正弦波，并将其注入每个相位的参考正弦波中，以产生SPWM。因此，抵消了CMV的LF峰。通过在不同控制策略下的实验，验证了该方案的可行性和有效性。

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  • 来源
    《Power Electronics, IET》 |2014年第6期|1644-1653|共10页
  • 作者

    Huang J.; Shi H.;

  • 作者单位

    School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China|c|;

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