Modulation and control of a single-stage HVDC/AC solid state transformer using modular multilevel converter

Ashish Kumar Sahoo, Ned Mohan

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

9 Scopus citations

Abstract

At high voltage and power levels in utility-scale applications, transformers are needed to step-down grid voltages for integrating renewables and motors. A novel single-stage solid state transformer (SST) interface using modular multilevel converter (MMC) is proposed to interface a low voltage machine with a high voltage DC grid. Due to its modular structure, the high voltage side is easily scalable. This interface has sinusoidal voltages with low dV/dt and sinusoidal currents resulting in low magnetic losses in the high frequency transformer. The machine connected converter is a single-stage matrix converter. At low machine speeds, an advanced control approach is proposed which shifts the control of generating adjustable magnitude voltages at the machine terminals to the MMC on the high voltage side of the transformer. This results in reduced voltage stress across the transformer, matrix converter and the machine and further reduction in losses to boost system efficiency at light load conditions. Simulation and experimental results validate the proposed modulation and control.

Original languageEnglish (US)
Title of host publication2017 IEEE Applied Power Electronics Conference and Exposition, APEC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1857-1864
Number of pages8
ISBN (Electronic)9781509053667
DOIs
StatePublished - May 17 2017
Event32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
Duration: Mar 26 2017Mar 30 2017

Publication series

NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Other

Other32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
CountryUnited States
CityTampa
Period3/26/173/30/17

Keywords

  • Matrix converter (MC)
  • Modular multi-level converter (MMC)
  • Pulse-width modulation
  • Renewable integration
  • Solid state transformer (SST)

Fingerprint Dive into the research topics of 'Modulation and control of a single-stage HVDC/AC solid state transformer using modular multilevel converter'. Together they form a unique fingerprint.

Cite this