A power electronic transformer with sinusoidal voltages and currents using modular multilevel converter

Ashish Kumar Sahoo, Ned Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

Power electronic transformer consisting of power converters and a high frequency transformer (HFT) can be used to interface a low voltage machine to a high voltage grid. A modular multilevel converter (MMC) is proposed as the power converter on the high voltage side to generate high frequency, adjustable magnitude sinusoidal voltages. A matrix converter (MC) is used on the low voltage side to synthesize three-phase adjustable frequency PWM AC at the machine terminals. With the leakage inductance of the transformer, a capacitor bank forms an LC filter to result in sinusoidal currents through the HFT. With sinusoidal voltages and currents through the transformer, there is significant reduction in transformer losses and also natural commutation of leakage energy is obtained. The magnitude of the output voltage requirement by the machine is met by controlling the output voltage of the MMC on the primary of the HFT, to result in reduced voltage stress and losses in the transformer, secondary side converter and the machine. The operating principle, modulation and control of the proposed PET is validated by simulations in MATLAB/Simulink.

Original languageEnglish (US)
Title of host publication2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
PublisherIEEE Computer Society
Pages3750-3757
Number of pages8
ISBN (Print)9781479927050
DOIs
StatePublished - 2014
Event7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014 - Hiroshima, Japan
Duration: May 18 2014May 21 2014

Publication series

Name2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014

Other

Other7th International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014
CountryJapan
CityHiroshima
Period5/18/145/21/14

Keywords

  • High frequency transformer (HFT)
  • matrix converter (MC)
  • modular multilevel converter (MMC)
  • power electronic transformer (PET)
  • pulse-width modulation (PWM)

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  • Cite this

    Sahoo, A. K., & Mohan, N. (2014). A power electronic transformer with sinusoidal voltages and currents using modular multilevel converter. In 2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014 (pp. 3750-3757). [6870037] (2014 International Power Electronics Conference, IPEC-Hiroshima - ECCE Asia 2014). IEEE Computer Society. https://doi.org/10.1109/IPEC.2014.6870037