State observer for grid-voltage sensorless control of a grid-connected converter equipped with an LCL filter

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Abstract

This paper proposes a simple grid-voltage sensorless alternative to the conventional PLL synchronization for a grid-connected converter equipped with an LCL filter. The grid-voltage magnitude and angle are estimated based only on the converter current and DC-voltage measurements. Reduced number of sensors decreases costs and amount of sensor wiring. The analytically derived design is validated experimentally.
Original languageEnglish
Pages (from-to)21-28
JournalEPE Journal
Volume25
Issue number3
DOIs
Publication statusPublished - 1 Sep 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • adaptive observer
  • grid-connected converter
  • grid-voltage sensorless
  • sensorless control
  • small-signal linearization

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  • Prizes

    Outstanding Paper at EPE ECCE Europe 2014

    Jarno Kukkola (Recipient) & Marko Hinkkanen (Recipient), 2014

    Prize: Award or honor granted for a specific work

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