Stable Adaptive Inertial Control of a Doubly-Fed Induction Generator

Eduard Muljadi, Moses Kang, Kyeon Hur, Yong Kang

Research output: Contribution to journalArticle

62 Scopus Citations

Abstract

This paper proposes a stable adaptive inertial control scheme of a doubly-fed induction generator. The proposed power reference is defined in two sections: the deceleration period and the acceleration period. The power reference in the deceleration period consists of a constant and the reference for maximum power point tracking (MPPT) operation. The latter contributes to preventing a second frequency dip (SFD) in this period because its reduction rate is large at the early stage of an event but quickly decreases with time. To improve the frequency nadir (FN), the constant value is set to be proportional to the rotor speed prior to an event. The reference ensures that the rotor speed converges to a stable operating region. To accelerate the rotor speed while causing a small SFD, when the rotor speed converges, the power reference is reduced by a small amount and maintained until it meets the MPPT reference. The results show that the scheme causes a small SFD while improving the FN and the rate of change of frequency in any wind conditions, even in a grid that has a high penetration of wind power.
Original languageAmerican English
Pages (from-to)2971-2979
Number of pages9
JournalIEEE Transactions on Smart Grid
Volume7
Issue number6
DOIs
StatePublished - 2016

NREL Publication Number

  • NREL/JA-5D00-66095

Keywords

  • FN
  • frequency nadir
  • inertial control
  • OD
  • over-deceleration
  • power reference
  • second frequency dip
  • SFD

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