A comparison of fault-tolerant control strategies for a PMSG-based marine current turbine system under generatorside converter faulty conditions

• Main Authors: Sana Toumi, Yassine Amirat, Elhoussin Elbouchikhi, Mohamed Trabelsi, Mohamed Benbouzid, M. Faouzi Mimouni
• Format: Article
• Language: English
• Published: ESRGroups 2017-09-01
• Series: Journal of Electrical Systems
• Subjects: Marine current turbine; permanent magnet synchronous generator; generator-side converter; open-circuit fault; fault-tolerant structure; fault-tolerant control; backstepping; secondorder sliding mode control
• Online Access: http://journal.esrgroups.org/jes/papers/13_3_5.pdf
• ISSN: 1112-5209; 1112-5209

This paper describes fault-tolerant control strategies for a Permanent Magnet Synchronous Generator (PMSG)-based Marine Current Turbine (MCT) dealing with the generator-side converter under faulty conditions. MCT system mainly used PI controllers. However, this type of controllers is very sensitive to faulty conditions such as an open circuit faults in the generator-side converter. As consequence, the MCT system represents a high decrease in its power generation and dynamic performances. In this faulty context, firstly, a fault tolerant structure consists in requiring only minimum hardware modifications to the converter is proposed. In the second part, a backstepping and a second-order sliding mode nonlinear control are therefore investigated for fault-tolerant control purposes. A comparison between the different control strategies is proposed to prove the most robust one.