Enhanced control and operation of DFIG-based wind farms during network unbalance

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

This paper investigates the control and operation of doubly fed induction generator (DFIG)-based wind generation systems under unbalanced voltage conditions. DFIG system behaviors under unbalanced voltage are analyzed and different control targets are discussed. A new rotor current control strategy containing a main controller and an auxiliary controller is proposed. The main controller is implemented in the positive (dq)+ frame without involving positive/negative sequence decomposition, whereas the auxiliary controller is implemented in the negative (dq)- frame with negative sequence current extracted. The impact of providing unbalanced control on converter voltage rating is investigated. Simulation results using EMTDC/PSCAD are presented for a 2-MW DFIG wind generation system to validate the proposed control scheme and to demonstrate the enhanced system operation during ldquosmallrdquo steady state and ldquolargerdquo transient unbalances.
Original languageEnglish
Pages (from-to)1073-1081
Number of pages8
JournalIEEE Transactions on Energy Conversion
Volume23
Issue number4
DOIs
Publication statusPublished - Dec 2008

Fingerprint

Asynchronous generators
Farms
Controllers
Electric potential
Electric current control
Rotors
Decomposition

Keywords

  • control design
  • converter
  • doubly fed induction generator (DFIG)
  • modeling
  • unbalance
  • wind turbine

Cite this

@article{e9a0ce99524442eb9ad9b098a3ad66bb,
title = "Enhanced control and operation of DFIG-based wind farms during network unbalance",
abstract = "This paper investigates the control and operation of doubly fed induction generator (DFIG)-based wind generation systems under unbalanced voltage conditions. DFIG system behaviors under unbalanced voltage are analyzed and different control targets are discussed. A new rotor current control strategy containing a main controller and an auxiliary controller is proposed. The main controller is implemented in the positive (dq)+ frame without involving positive/negative sequence decomposition, whereas the auxiliary controller is implemented in the negative (dq)- frame with negative sequence current extracted. The impact of providing unbalanced control on converter voltage rating is investigated. Simulation results using EMTDC/PSCAD are presented for a 2-MW DFIG wind generation system to validate the proposed control scheme and to demonstrate the enhanced system operation during ldquosmallrdquo steady state and ldquolargerdquo transient unbalances.",
keywords = "control design, converter, doubly fed induction generator (DFIG), modeling, unbalance, wind turbine",
author = "L. Xu",
year = "2008",
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language = "English",
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}

Enhanced control and operation of DFIG-based wind farms during network unbalance. / Xu, L.

In: IEEE Transactions on Energy Conversion, Vol. 23, No. 4, 12.2008, p. 1073-1081.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhanced control and operation of DFIG-based wind farms during network unbalance

AU - Xu, L.

PY - 2008/12

Y1 - 2008/12

N2 - This paper investigates the control and operation of doubly fed induction generator (DFIG)-based wind generation systems under unbalanced voltage conditions. DFIG system behaviors under unbalanced voltage are analyzed and different control targets are discussed. A new rotor current control strategy containing a main controller and an auxiliary controller is proposed. The main controller is implemented in the positive (dq)+ frame without involving positive/negative sequence decomposition, whereas the auxiliary controller is implemented in the negative (dq)- frame with negative sequence current extracted. The impact of providing unbalanced control on converter voltage rating is investigated. Simulation results using EMTDC/PSCAD are presented for a 2-MW DFIG wind generation system to validate the proposed control scheme and to demonstrate the enhanced system operation during ldquosmallrdquo steady state and ldquolargerdquo transient unbalances.

AB - This paper investigates the control and operation of doubly fed induction generator (DFIG)-based wind generation systems under unbalanced voltage conditions. DFIG system behaviors under unbalanced voltage are analyzed and different control targets are discussed. A new rotor current control strategy containing a main controller and an auxiliary controller is proposed. The main controller is implemented in the positive (dq)+ frame without involving positive/negative sequence decomposition, whereas the auxiliary controller is implemented in the negative (dq)- frame with negative sequence current extracted. The impact of providing unbalanced control on converter voltage rating is investigated. Simulation results using EMTDC/PSCAD are presented for a 2-MW DFIG wind generation system to validate the proposed control scheme and to demonstrate the enhanced system operation during ldquosmallrdquo steady state and ldquolargerdquo transient unbalances.

KW - control design

KW - converter

KW - doubly fed induction generator (DFIG)

KW - modeling

KW - unbalance

KW - wind turbine

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JF - IEEE Transactions on Energy Conversion

SN - 0885-8969

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