Fault-Tolerant Back-to-Back Converter for Direct-Drive PMSG Wind Turbines Using Direct Torque and Power Control Techniques

Fault tolerance in wind turbines is considered crucial to increase their reliability and availability levels. This paper presents a fault-tolerant direct-drive permanent magnet synchronous generator (PMSG) using new direct control techniques, with the ability to handle power semiconductor open-circu...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2019-11, Vol.34 (11), p.11215-11227
Main Authors: Jlassi, Imed, Cardoso, Antonio J. Marques
Format: Article
Language:English
Subjects:
Algorithms
Circuit faults
Circuits
Computer simulation
Control systems
Converters
Direct power control (DPC)
direct torque control (DTC)
Fault tolerance
Fault tolerant systems
fault-tolerant back-to-back converter
Legged locomotion
permanent magnet machines
Permanent magnets
Power control
power switch open-circuit (O-C) faults
Stability
Switches
Thyristors
Topology
Torque
wind turbine systems
Wind turbines
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Summary:Fault tolerance in wind turbines is considered crucial to increase their reliability and availability levels. This paper presents a fault-tolerant direct-drive permanent magnet synchronous generator (PMSG) using new direct control techniques, with the ability to handle power semiconductor open-circuit faults in the full-scale back-to-back converter. The fault-tolerant topology consists of a five-leg converter, with a shared leg connected to a generator phase and to its corresponding grid phase, through a triode for alternating current (TRIAC). The main contribution of this paper consists of the development of an alternative direct torque control and direct power control schemes for both machine-side converter and grid-side converter, respectively. Moreover, a reliable fault diagnostics algorithm without requiring additional sensors is also integrated, providing the information required to instantaneously trigger fault-tolerant remedial strategies. Simulation and experimental results are presented to validate the effectiveness of the proposed fault-tolerant PMSG drive.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2897541