Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation
Research on applying selective harmonic elimination pulse width modulation (SHE-PWM) to high power converters has drawn tremendous interest, due to the advantages of low switching frequency and high output harmonic performance. In the fields of high power converters such as variable speed traction m...
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doaj-e27bd84fd54d4ac0a6472952a733a3b22020-11-25T03:46:25ZengMDPI AGEnergies1996-10732020-08-01134348434810.3390/en13174348Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM ModulationJingling Cheng0Dongdong Chen1Guozhu Chen2Department of Electrical Engineering, Zhejiang University, No.38 Zheda Road, Xihu District, Hangzhou 310027, ChinaSchool of Electronic and Electrical Engineering, Minnan University of Science and Technology, No.1 Longjing Road, Shishi, Quanzhou 362700, ChinaDepartment of Electrical Engineering, Zhejiang University, No.38 Zheda Road, Xihu District, Hangzhou 310027, ChinaResearch on applying selective harmonic elimination pulse width modulation (SHE-PWM) to high power converters has drawn tremendous interest, due to the advantages of low switching frequency and high output harmonic performance. In the fields of high power converters such as variable speed traction motor drives and static synchronous compensators (STATCOM), the adoption of high voltage but slow speed semiconductor devices, i.e., IGBT/IGCT, results in a longer dead time of several microseconds, which leads to a motor vibration in the former case or the distortion of grid current in the latter case. This paper analyzes in detail the mechanism of the dead-time effect on 3-level SHE-PWM with different operating conditions considered. For the first time, a general mathematical model describing the relationship between the dead time and harmonic distribution of SHE-PWM wave is established. Based on which an open-loop compensation method by inserting a margin time into the effective switching angles is proposed. Furthermore, a closed-loop controller that implements online adaptive adjustment of the margin time is designed in case of a variable frequency application. The effectiveness of the proposed method in different scenarios is verified through simulation results.https://www.mdpi.com/1996-1073/13/17/4348selective harmonic eliminationhigh power convertersdead-time effectclosed-loop compensation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jingling Cheng Dongdong Chen Guozhu Chen |
spellingShingle |
Jingling Cheng Dongdong Chen Guozhu Chen Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation Energies selective harmonic elimination high power converters dead-time effect closed-loop compensation |
author_facet |
Jingling Cheng Dongdong Chen Guozhu Chen |
author_sort |
Jingling Cheng |
title |
Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation |
title_short |
Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation |
title_full |
Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation |
title_fullStr |
Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation |
title_full_unstemmed |
Modeling and Compensation for Dead-Time Effect in High Power IGBT/IGCT Converters with SHE-PWM Modulation |
title_sort |
modeling and compensation for dead-time effect in high power igbt/igct converters with she-pwm modulation |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-08-01 |
description |
Research on applying selective harmonic elimination pulse width modulation (SHE-PWM) to high power converters has drawn tremendous interest, due to the advantages of low switching frequency and high output harmonic performance. In the fields of high power converters such as variable speed traction motor drives and static synchronous compensators (STATCOM), the adoption of high voltage but slow speed semiconductor devices, i.e., IGBT/IGCT, results in a longer dead time of several microseconds, which leads to a motor vibration in the former case or the distortion of grid current in the latter case. This paper analyzes in detail the mechanism of the dead-time effect on 3-level SHE-PWM with different operating conditions considered. For the first time, a general mathematical model describing the relationship between the dead time and harmonic distribution of SHE-PWM wave is established. Based on which an open-loop compensation method by inserting a margin time into the effective switching angles is proposed. Furthermore, a closed-loop controller that implements online adaptive adjustment of the margin time is designed in case of a variable frequency application. The effectiveness of the proposed method in different scenarios is verified through simulation results. |
topic |
selective harmonic elimination high power converters dead-time effect closed-loop compensation |
url |
https://www.mdpi.com/1996-1073/13/17/4348 |
work_keys_str_mv |
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