Implementation and experimental investigation of a sensorless field-oriented control scheme for permanent-magnet synchronous generators

Mohamed Abdelrahem, Christoph Michael Hackl, Ralph Kennel

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Variable-speed wind energy conversion systems based on permanent-magnet synchronous generators (PMSGs) are typically controlled using the field-oriented control (FOC) principles. Therefore, accurate information of the rotor speed and position are essential to perform the required reference frame transformations. These signals can be obtained by mechanical sensors (e.g., position encoders or speed transducers) or via estimation schemes. This paper proposes a sensorless FOC strategy for direct-driven PMSGs in variable-speed wind turbines. A synchronously rotating reference frame phase-locked loop (PLL) that utilizes a model-based back elector-motive force (back-EMF) estimation is employed to estimate the rotor speed and position of the PMSG. The proposed sensorless FOC strategy is experimentally implemented, and its performance is investigated for all operation conditions and under parameter variations of the PMSG.

Original languageEnglish
Pages (from-to)849-856
Number of pages8
JournalElectrical Engineering
Volume100
Issue number2
DOIs
StatePublished - 1 Jun 2018

Keywords

  • Field-oriented control
  • Permanent-magnet synchronous generator
  • Phase-locked loop
  • Sensorless control
  • Variable-speed wind turbines

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