Direct Power Control Applied to Doubly Fed Induction Generator Under Unbalanced Grid Voltage Conditions

This paper analyzes the effects of unbalanced voltage on doubly fed induction generators. It also presents a novel control strategy based on direct power control (DPC+) applied to this type of generators, predominant in wind energy applications, that enables them to work under perturbed conditions a...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2008-09, Vol.23 (5), p.2328-2336
Main Authors: Santos-Martin, D., Rodriguez-Amenedo, J.L., Arnalte, S.
Format: Article
Language:English
Subjects:
Active control
Applied sciences
Converters
Direct energy conversion and energy accumulation
Direct power control (DPC+)
doubly fed induction generator (DFIG)
Electric currents
Electric potential
Electric power
Electrical engineering. Electrical power engineering
Electrical equipment
Electrical machines
Electrical power engineering
Electronics
Energy
Exact sciences and technology
Generators
Induction generators
Miscellaneous
Natural energy
Power control
Power generation
Reactive power control
Regulation and control
Rotors
Stators
Testing
unbalanced voltage
Voltage
voltage dip
Wind energy
Wind energy generation
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Summary:This paper analyzes the effects of unbalanced voltage on doubly fed induction generators. It also presents a novel control strategy based on direct power control (DPC+) applied to this type of generators, predominant in wind energy applications, that enables them to work under perturbed conditions and achieve optimum results. Although the technique can be implemented to control both rotor converters and grid converters, we will hereby exemplify the former which regulates stator active and reactive power. The results obtained with DPC+ are then compared through experimental tests to indicate that the technique is suitable and achieves good dynamic responses while controlling current distortion, power or torque oscillations. The validation of results has been performed through experimental tests on a 20-kW generator.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2008.2001907