Impacts of Symmetrical and Asymmetrical Voltage Sags on DFIG-Based Wind Turbines Considering Phase-Angle Jump, Voltage Recovery, and Sag Parameters

This paper presents a new analysis into the impacts of various symmetrical and asymmetrical voltage sags on doubly fed induction generator (DFIG)-based wind turbines. Fault ride-through requirements are usually defined by the grid codes at the point of common coupling (PCC) of wind farms to the powe...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2011-05, Vol.26 (5), p.1587-1598
Main Authors: Mohseni, M., Islam, S. M., Masoum, M. A. S.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit faults
Computer simulation
Direct energy conversion and energy accumulation
Doubly fed induction generator (DFIG)
Electric power
Electric power plants
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
fault ride-through (FRT) capability
Generators
High voltage or high current generators
Impedance
Miscellaneous
Non classical power plants
phase-angle jump
Power networks and lines
Power system stability
sag parameters
Turbines
Various equipment and components
Voltage fluctuations
voltage sag recovery
Wind farms
Wind power
Wind power plants
Wind turbines
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Summary:This paper presents a new analysis into the impacts of various symmetrical and asymmetrical voltage sags on doubly fed induction generator (DFIG)-based wind turbines. Fault ride-through requirements are usually defined by the grid codes at the point of common coupling (PCC) of wind farms to the power network. However, depending on the network characteristics and constraints, the voltage sag conditions experienced at the wind generator terminals can be significantly different from the conditions at the PCC. Therefore, it is very important to identify the voltage sags that can practically affect the operation of wind generators. Extensive simulation studies are carried out in MATLAB/Simulink to investigate the transient overshoots and ripples that appear in the rotor current and dc-link voltage when the DFIG is subjected to various types of (a)symmetrical faults. For the first time, the impacts of phase-angle jump and operational constraints of circuit breakers are examined. Furthermore, the influences of sag parameters including type, initial point-on-wave instant, depth, and impedance angle are investigated. Complementary theoretical analyses are also presented to support the validity of observations made in the simulation studies.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2010.2087771