An Active FTC Strategy Using Generalized Proportional Integral Observers Applied to Five-Phase PMSG based Tidal Current Energy Conversion Systems

Zhuo Liu, Azeddine Houari, Mohamed Machmoum, Mohamed-Fouad Benkhoris and Tianhao Tang
Additional contact information
Zhuo Liu: IREENA Laboratory, University of Nantes, 37 Boulevard de l’Université BP 406, 44602 Saint-Nazaire, France
Azeddine Houari: IREENA Laboratory, University of Nantes, 37 Boulevard de l’Université BP 406, 44602 Saint-Nazaire, France
Mohamed Machmoum: IREENA Laboratory, University of Nantes, 37 Boulevard de l’Université BP 406, 44602 Saint-Nazaire, France
Mohamed-Fouad Benkhoris: IREENA Laboratory, University of Nantes, 37 Boulevard de l’Université BP 406, 44602 Saint-Nazaire, France
Tianhao Tang: Department of Electrical Automation, Shanghai Maritime University, Shanghai 201306, China

Energies, 2020, vol. 13, issue 24, 1-22

Abstract: In recent years, multi-phase permanent magnet synchronous generators (PMSGs) have become attractive in the field of tidal current energy conversion systems (TCECS) due to their high-power density, reliability, and availability. However, external disturbances and malfunctions in power conversion chains will bring challenges to achieving stable and continuous tidal current energy harnessing. Using generalized proportional integral observers, an active fault-tolerant control (AFTC) strategy is therefore proposed for a five-phase PMSG based TCECS that is subjected to an open switch fault (OSF) in the generator side converter. This proposed AFTC strategy is applied into q -axis current control loops, which contain fault detection and compensation. The fault compensator will be smoothly activated using a sigmoid function once the OSF is detected. Finally, a small-scale power experimental platform emulating the TCECS is established in order to verify the feasibility and efficiency of the proposed FTC strategy. Experiment results show that this AFTC strategy can detect faults rapidly and effectively attenuate torque ripples in the post-fault operation mode.

Keywords: five-phase PMSG; active fault-tolerant control; generalized proportional integral observer; tidal current energy conversion system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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