Improved rotor current control of wind turbine driven doubly-fed induction generators during network voltage unbalance

Jiabing Hu, Yikang He, Lie Xu

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This paper investigates an improved control and operation of a doubly-fed induction generator (DFIG) system under unbalanced network conditions. A new rotor current control scheme is presented, which consists of a main controller and an auxiliary compensator. The main controller is constructed in the same way as the conventional vector control design without involving sequential-component decomposition in order to guarantee system stability and high transient response. While the auxiliary controller is specially designed to control the negative sequence current taking into account the impact of the main controller on negative sequence components. Simulated results on a commercial 1.5-MW DFIG system and experimental tests on a 1.5-kW DFIG prototype are provided and compared with those of conventional vector control and dual PI current control schemes to demonstrate the effectiveness of the proposed control strategy during steady-state and transient conditions when the network voltage is unbalanced.
Original languageEnglish
Pages (from-to)847-856
Number of pages10
JournalElectric Power Systems Research
Volume80
Issue number7
DOIs
Publication statusPublished - Jul 2010

Keywords

  • rotor current control
  • wind turbine
  • doubly-fed induction generator (DFIG)
  • network voltage unbalance

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