Predictive Direct Power Control of Doubly Fed Induction Generators Under Unbalanced Grid Voltage Conditions for Power Quality Improvement

Jiefeng Hu, Jianguo Zhu, David G. Dorrell

Research output: Journal article publicationJournal articleAcademic researchpeer-review

74 Citations (Scopus)

Abstract

This paper proposes a new control strategy of doubly fed induction generators (DFIGs) under unbalanced grid voltage conditions. The proposed controller includes a model predictive direct power control (MPDPC) method and a power compensation scheme. In MPDPC, the appropriate voltage vector is selected according to an optimization cost function, hence the instantaneous active and reactive powers are regulated directly in the stator stationary reference frame without the requirement of coordinate transformation, PI regulators, switching table, or PWM modulators. In addition, the behavior of the DFIG under unbalanced grid voltage is investigated. Next, a power compensation scheme without the need of extracting negative stator current sequence is developed. By combining the proposed MPDPC strategy and the power compensation scheme, distorted currents injected into the power grid by the DFIGs can be eliminated effectively.
Original languageEnglish
Article number6875909
Pages (from-to)943-950
Number of pages8
JournalIEEE Transactions on Sustainable Energy
Volume6
Issue number3
DOIs
Publication statusPublished - 1 Jul 2015
Externally publishedYes

Keywords

  • Doubly fed induction generator (DFIG)
  • model predictive control (MPC)
  • power quality
  • unbalanced grid voltage

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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