Comparative evaluation of modulation schemes for grid-connected parallel interleaved inverters

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Abstract

A comparative evaluation of the different modulation schemes for the grid-connected converter with two parallel interleaved Voltage Source Converters (VSCs) is presented in this paper. The volume and the losses of the converter-side inductor of the LCL harmonic filter are evaluated for the grid-side converter of the multi-MW Wind Energy Conversion System (WECS). In order to achieve high current rating in MW-level WECS, two-level VSCs are often connected in parallel. The parallel connected VSCs can be operated with interleaved carrier signals and can be treated as a multi-level converter. As a result, the size of the harmonic filter components can be significantly reduced. However, circulating current flows between the parallel VSCs and it is often suppressed using a Coupled Inductor (CI). The losses and size of the CI are also evaluated for different modulation schemes and compared in this paper. A detailed discussion on the loss modeling of the inductive components and a multi-objective optimization method is also presented
OriginalsprogEngelsk
TitelProceedings of IEEE 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG), 2016
Antal sider8
ForlagIEEE Press
Publikationsdatojun. 2016
Artikelnummer7527074
ISBN (Elektronisk)978-1-4673-8617-3
DOI
StatusUdgivet - jun. 2016
Begivenhedthe 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2016) - Vancouver, Canada
Varighed: 27 jun. 201630 jun. 2016

Konference

Konferencethe 7th International Symposium on Power Electronics for Distributed Generation Systems (PEDG 2016)
Land/OmrådeCanada
ByVancouver
Periode27/06/201630/06/2016
NavnIEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
ISSN2329-5767

Emneord

  • Coils
  • Harmonic analysis
  • Phase modulation
  • Power conversion
  • Pulse width modulation
  • Voltage source converters (VSC)
  • filter design
  • harmonic filter
  • interleaving
  • multi-objective optimization
  • phase disposition modulation
  • pulse width modulation

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