Chapters authored
State-of-the-Art on the Marine Current Turbine System Faults
This chapter deals with the state of the art on the marine current turbine (MCT) system faults. Indeed, the MCT structure consists of a marine turbine, a generator (permanent magnet synchronous generator (PMSG) or doubly fed induction generator (DFIG)), and a PWM power converter. Nevertheless, these systems are exposed to functional and environmental severe conditions. Firstly, the power increase leads to a higher current and/or voltage. Second, the installation of the MCT system under the sea and the existence of the swell and wave imply harmonic current speeds. In fact, several faults (related to the turbine, the generator, the blades, and the converters) can occur in the MCT system. Most of these faults generate the speed and the torque oscillations, which can lead to mechanical vibrations and the rapid destruction of the insulating material generator. Consequently, MCT system performances can be degraded.
Part of the book: Exergy
Modeling and Simulation of a PMSG-Based Marine Current Turbine System with Inter-Turn Faults
This chapter deals with modeling and simulation of a permanent magnet synchronous generator (PMSG)-based marine current turbine (MCT) with inter-turn faults. The generator is modeled in healthy and faulty conditions by using the (abc) reference frame and the (dq) reference frame. Indeed, the PMSG, installed under the sea (existence of the swell and wave), can be exposed to higher voltages and/or currents transited, which leads to the appearance of various faults. In this chapter, the faulty mode deals with the study of the stator inter-turn short-circuit faults in the PMSG. In fact, this fault presents a big problem because it can lead to the total degradation of the machine. Simulation results are carried out by using Matlab/Simulink environment.
Part of the book: Induction Motors