Doubly Fed Induction Generator Low Voltage Ride Through Improvement Through Modular Multilevel Converter

Doubly Fed Induction Generator Low Voltage Ride Through Improvement Through Modular Multilevel Converter

This paper proposes a novel fault current suppression method for doubly fed induction generator (DFIG) low voltage ride through (LVRT) improvement employing modular multilevel converter (MMC). It is based on the inherent MMC arm impedance and the number of levels to provide transient damping of DFIG...

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Bibliographic Details
Published in:IEEE access Vol. 10; pp. 57914 - 57929
Main Authors: De Souza, Victor Ramon F. B., Barros, Luciano S., Costa, Flavio B., Junior, Guilherme P. Da Silva
Format: Journal Article
Language:English
Published: Piscataway IEEE 2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Capacitors
Converters
Damping
Doubly fed induction generator
Doubly fed induction generators
fault current suppression
Fault currents
Impedance
Induction generators
Low voltage
low voltage ride through
modular multilevel converter
Performance assessment
Rotors
Stators
Switches
wind energy conversion systems
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Summary:This paper proposes a novel fault current suppression method for doubly fed induction generator (DFIG) low voltage ride through (LVRT) improvement employing modular multilevel converter (MMC). It is based on the inherent MMC arm impedance and the number of levels to provide transient damping of DFIG rotor and stator currents under severe grid faults, contributing effectively to maintaining the DFIG connection while ensuring controllability by avoiding the protection activation. Neither additional hardware nor control loops are necessary. DFIG dynamic equations under LVRT, including the contribution of the MMC, are presented, and a model is derived for control design. Performance assessment, including symmetrical and asymmetrical fault scenarios for MMC with 3, 21, 51, and 101 levels and comparison with existing and proposed controllers, highlighted that arm impedance and increased MMC level number contributed to DFIG stator and rotor fault current suppression, providing DFIG LVRT improvement under severe grid fault conditions.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2022.3178960