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

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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
Issue number3
Publication statusPublished - 1 Sep 2015
MoE publication typeA1 Journal article-refereed

    Research areas

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

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