Flexible IQ-V Scheme of a DFIG for Rapid Voltage Regulation of a Wind Power Plant

Jinho Kim, Eduard Muljadi, Jung Wook Park, Yong Cheol Kang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

This paper proposes a flexible reactive current-to-voltage ($I-{Q}-{V}$ ) scheme of a doubly fed induction generator (DFIG) for the rapid voltage regulation of a wind power plant (WPP). In the proposed scheme, the WPP controller dispatches different voltage set points to the DFIGs depending on their rotor voltage margins. The DFIGs inject different reactive powers with the flexible schemes implemented in the rotor-side and grid-side converters. The characteristic, which consists of the gain and width of a linear band and capability, varies with time depending on the capability of the converters and a voltage dip at the point of interconnection (POI). To increase the capability during a fault, the active current is reduced in proportion to a voltage dip. If the IQ capability and/or the POI voltage dip are large, the gain is set to be high, thereby providing rapid voltage regulation. To avoid an overvoltage after the fault clearance, a rapid reduction scheme is implemented in the WPP and DFIG controllers. The performance of the proposed flexible scheme was verified under scenarios with various disturbances. The proposed scheme can help increase wind power penetration without jeopardizing voltage stability.

Original languageEnglish
Article number7914740
Pages (from-to)8832-8842
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume64
Issue number11
DOIs
Publication statusPublished - 2017 Nov

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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