A Current Online Prediction Based Dead Time Compensation Method for MMC Low Common Mode Voltage CPS SPWM

The modular multi-level converter (MMC) exhibits significant potential in voltage source converter-based high voltage direct current (VSC-HVDC) transmission and high voltage motor drive. Low common mode voltage (CMV) modulations for MMC can effectively reduce the common-mode (CM) electromagnetic int...

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Published inIEEE electromagnetic compatibility magazine Vol. 14; no. 1; pp. 38 - 48
Main Authors Wang, Zuoxing, Li, Hong, Li, Yanjun, He, Daozhen
Format Journal Article Magazine Article
LanguageEnglish
Published New York IEEE 01.01.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Circuit protection
common mode voltage
Compensation
dead time
Direct current
Effectiveness
Electric power transmission
Electromagnetic interference
electromagnetic interference (EMI) suppression
Fluctuations
High voltages
High-voltage techniques
Modular multi-level converter (MMC)
modulation
Motor drives
Multilevel converters
Phase modulation
Power conversion
Power semiconductor devices
Pulse duration modulation
Pulse width modulation
Switching frequency
Online AccessGet full text
ISSN2162-2264
2162-2272
DOI10.1109/MEMC.2025.11051187

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Abstract The modular multi-level converter (MMC) exhibits significant potential in voltage source converter-based high voltage direct current (VSC-HVDC) transmission and high voltage motor drive. Low common mode voltage (CMV) modulations for MMC can effectively reduce the common-mode (CM) electromagnetic interference (EMI) in MMC by minimizing the CMV fluctuations. However, the dead time is necessary for protecting the power semiconductor devices in bridge circuits like MMC, which make the low CMV modulations fail and cause serious CM EMI. In this paper, a current online prediction based dead time compensation method (COP-DTCM) for MMC low CMV carrier phase shifted (CPS) sinusoidal pulse width modulation (SPWM) is proposed for the first time, to eliminate the CMV fluctuations in MMC. Besides, the mechanism and characteristics of the CMV fluctuations in MMC caused by the dead time are analyzed in detail. The compensation strategy of the carrier phase positions and modulation signals for MMC under CPS SPWM is presented based on the prediction results of arm currents. Finally, the effectiveness and correctness of the proposed COP-DTCM are verified by the simulation and experimental results. Therefore, this paper provides an effective CM EMI suppression method for MMC with low EMI requirement.
AbstractList The modular multi-level converter (MMC) exhibits significant potential in voltage source converter-based high voltage direct current (VSC-HVDC) transmission and high voltage motor drive. Low common mode voltage (CMV) modulations for MMC can effectively reduce the common-mode (CM) electromagnetic interference (EMI) in MMC by minimizing the CMV fluctuations. However, the dead time is necessary for protecting the power semiconductor devices in bridge circuits like MMC, which make the low CMV modulations fail and cause serious CM EMI. In this paper, a current online prediction based dead time compensation method (COP-DTCM) for MMC low CMV carrier phase shifted (CPS) sinusoidal pulse width modulation (SPWM) is proposed for the first time, to eliminate the CMV fluctuations in MMC. Besides, the mechanism and characteristics of the CMV fluctuations in MMC caused by the dead time are analyzed in detail. The compensation strategy of the carrier phase positions and modulation signals for MMC under CPS SPWM is presented based on the prediction results of arm currents. Finally, the effectiveness and correctness of the proposed COP-DTCM are verified by the simulation and experimental results. Therefore, this paper provides an effective CM EMI suppression method for MMC with low EMI requirement.
Author Wang, Zuoxing
Li, Yanjun
Li, Hong
He, Daozhen
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SubjectTerms Circuit protection
common mode voltage
Compensation
dead time
Direct current
Effectiveness
Electric power transmission
Electromagnetic interference
electromagnetic interference (EMI) suppression
Fluctuations
High voltages
High-voltage techniques
Modular multi-level converter (MMC)
modulation
Motor drives
Multilevel converters
Phase modulation
Power conversion
Power semiconductor devices
Pulse duration modulation
Pulse width modulation
Switching frequency
Title A Current Online Prediction Based Dead Time Compensation Method for MMC Low Common Mode Voltage CPS SPWM
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Volume 14
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