Control Solution to Over-modulation of DFIG Converter for Asymmetrical Fault Ride Through

Yuanzhu Chang, Maxime Berger, Ilhan Kocar

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

This letter proposes a control solution to mitigate the problem of converter over-modulation in doubly fed induction generator (DFIG)-based wind turbine generators (WTGs). Overmodulation is a critical reason in failing to ride through asymmetrical faults and inject positive- and negative-sequence reactive currents (I1R and I2R) per grid code requirements. Analytical expressions are first proposed to independently calculate the transient, positive- and negative-sequence current components. The I2R injection factor is then optimized to mitigate the problem of steady-state over-modulation. The transient components are eliminated in the inner-loop control to mitigate the problem of transient over-modulation. The proposed control solution is validated with EMT-type simulations. The results show that the transient performance and the fault ride through (FRT) capability are significantly improved.

Original languageEnglish
Article number10119222
Pages (from-to)1-4
Number of pages4
JournalIEEE Transactions on Sustainable Energy
DOIs
Publication statusPublished - 2 May 2023

Keywords

  • Asymmetrical fault
  • Couplings
  • doubly fed induction generator (DFIG)
  • Doubly fed induction generators
  • fault ride through
  • Phase locked loops
  • Rotors
  • Stators
  • Transient analysis
  • Voltage control

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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