<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The selective harmonic elimination (SHE) is a preferable modulation technique in medium and high power converters applications as it enables for using low switching frequency with high flexibility to eliminate specific harmonics. The digital implementation of the SHE is a challenging issue as it requires a very accurate generation of the switching pulses. The theoretical calculation of the switching angles cannot guarantee the same results when digitally implemented by digital controllers. The digitizing process with a relatively low sampling frequency due to the digital implementation introduces error for each applied switching angle. Consequently, the applied switching angles will not match the theoretical ones resulted in residual errors for the selected harmonics that should be eliminated. This paper presents a new approach to improve SHE accuracy by online prediction and implementing of the closest true angles to minimize the residual harmonics.</p></abstract>

The selective harmonic elimination (SHE) is a preferable modulation technique in medium and high power converters applications as it enables for using low switching frequency with high flexibility to eliminate specific harmonics. The digital implementation of the SHE is a challenging issue as it requires a very accurate generation of the switching pulses. The theoretical calculation of the switching angles cannot guarantee the same results when digitally implemented by digital controllers. The digitizing process with a relatively low sampling frequency due to the digital implementation introduces error for each applied switching angle. Consequently, the applied switching angles will not match the theoretical ones resulted in residual errors for the selected harmonics that should be eliminated. This paper presents a new approach to improve SHE accuracy by online prediction and implementing of the closest true angles to minimize the residual harmonics.

A new approach to enhance the accuracy of selective harmonics-elimination technique for digital controllers

Department of Electrical and Automation Engineering

Electrical and Electronics Engineering Department

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The selective harmonic elimination (SHE) is a preferable modulation technique in medium and high power converters applications as it enables for using low...

A new approach to enhance the accuracy of selective harmonics-elimination technique for digital controllers

Published Online: Nov 26, 2019

Page range: 358 - 369

Received: Jul 16, 2019

DOI: https://doi.org/10.2478/jee-2019-0067

Keywords
selective harmonic elimination, digital controllers, three-level neutral-point clamped converters

© 2019 Hany A. Hamed et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

A new approach to enhance the accuracy of selective harmonics-elimination technique for digital controllers

Published Online: Nov 26, 2019

Page range: 358 - 369

Received: Jul 16, 2019

DOI: https://doi.org/10.2478/jee-2019-0067

Keywordsselective harmonic elimination, digital controllers, three-level neutral-point clamped converters

© 2019 Hany A. Hamed et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
selective harmonic elimination, digital controllers, three-level neutral-point clamped converters