Abstract
This paper develops a dynamic model and control scheme for DFIG systems to improve the performance and stability under unbalanced grid conditions. A dynamic DFIG model containing the positive and negative sequence components is presented using stator voltage orientation. The proposed model accurately illustrates the active power, reactive power and torque oscillations, and provides a basis for DFIG control system design during unbalanced network supply. Various control targets such as eliminating the oscillations of the torque, active/reactive power are discussed and the required rotor negative sequence current for fulfilling different control targets are described. Performance of a DFIG-based wind turbine under unbalanced condition using the proposed control method is evaluated by simulation studies using Matlab/Simulink. The proposed control scheme significantly attenuates the DFIG torque or active power oscillations during network unbalance whereas significant torque/power oscillations exist with the conventional control schemes.
Original language | English |
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Title of host publication | IEEE IEMDC 2007 |
Subtitle of host publication | Proceedings of the International Electric Machines and Drives Conference |
Place of Publication | New York |
Publisher | IEEE |
Pages | 430-435 |
Number of pages | 5 |
ISBN (Print) | 9781424407422 |
DOIs | |
Publication status | Published - 16 Jul 2007 |
Event | IEEE International Electric Machines & Drives Conference (IEMDC) - Antalya, Turkey Duration: 3 May 2007 → 5 May 2007 |
Conference
Conference | IEEE International Electric Machines & Drives Conference (IEMDC) |
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City | Antalya, Turkey |
Period | 3/05/07 → 5/05/07 |
Keywords
- wind turbines
- power system modeling
- control system synthesis
- control systems
- dfig-based wind generation systems
- wind generation systems
- dfig-based
- unbalanced network supply