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DOE OSTI · 2472706

Conditional Sixth-Harmonic Injection to Improve the Linear Modulation Range of Three-Phase Voltage-Source Converters

Das, Anubrata [Univ. of Tennessee, Knoxville, TN (United States)] (ORCID:0000000309129188)·Wang, Fred [Univ. of Tennessee, Knoxville, TN (United States)] (ORCID:0000000221339199)·Xue, Yaosuo [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000249129660)
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Abstract

Overmodulation techniques are used to improve dc bus voltage utilization for three-phase voltage-source converters (VSCs), resulting in significant reduction in fundamental voltage gain. Conventional pulse width modulation (PWM) techniques for three-phase VSCs cannot enhance the linear range of dc bus utilization by more than 15.5%. Here, in this letter, a conditional sixth-harmonic injection technique is introduced, which can theoretically improve the linear modulation range by up to 19.2% for three-phase ac systems without additional hardware components. Experimental validation of the proposed scheme is presented, with its performance compared against the conventional third-harmonic PWM technique.

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Das, Anubrata [Univ. of Tennessee, Knoxville, TN (United States)] (ORCID:0000000309129188), Wang, Fred [Univ. of Tennessee, Knoxville, TN (United States)] (ORCID:0000000221339199), Xue, Yaosuo [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000249129660). 2024-12-01. Conditional Sixth-Harmonic Injection to Improve the Linear Modulation Range of Three-Phase Voltage-Source Converters. https://doi.org/10.1109/tpel.2024.3445870

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