Cover -- Title Page -- Copyright Page -- Contents -- Introduction -- Chapter 1. Accurate Electrical Fault Detection in the Permanent Magnet Synchronous Generator and in the Diode Bridge Rectifier of a Wind Energy Conversion System -- 1.1. Introduction -- 1.2. Description of the system under study and the used fault detection method -- 1.3. Fundamental notions of the symmetrical components -- 1.4. Development of the analytical expressions of the NSV in the case of the different considered faults -- 1.4.1. Analytical expression of 2 V in the case of simultaneous faults

1.4.2. Analytical expression of 2 V in the case of ITSCF in the PMSG -- 1.4.3. Analytical expression of 2 V in the case of OCDF in the rectifier -- 1.5. Analytical study of the indicators of the different faults -- 1.5.1. Analytical study in the case of ITSCF -- 1.5.2. Analytical study in the case of OCDF in the rectifier -- 1.5.3. Analytical study in the case of SF -- 1.6. Experimental validation of the proposed fault indicators -- 1.6.1. Description of the tests process -- 1.6.2. Experimental results in the case of healthy operation

1.6.3. Experimental results in the case of ITSCF in the PMSG -- 1.6.4. Experimental results in the case of an OCDF fault in the rectifier -- 1.6.5. Experimental results in the case of SF in the system considered -- 1.7. Description of the method proposed -- 1.8. Conclusion -- 1.9. References -- Chapter 2. Control and Diagnosis of Faults in Multiphase Permanent Magnet Synchronous Generators for High-Power Wind Turbines -- 2.1. Introduction -- 2.2. Wind energy conversion systems -- 2.3. Multiphase electric drives on WECS -- 2.4. Model of a six-phase PMSG drive -- 2.4.1. Natural reference frame

2.4.2. Synchronous reference frame -- 2.5. Control strategies -- 2.5.1. Introduction -- 2.5.2. Field-oriented control -- 2.5.3. Direct torque control -- 2.5.4. Finite control set model predictive control -- 2.6. Fault diagnosis in multiphase drives -- 2.6.1. Introduction -- 2.6.2. Interturn short-circuit faults -- 2.6.3. High-resistance connections and open-phase faults -- 2.6.4. Permanent magnet faults -- 2.6.5. Current sensor faults -- 2.6.6. Speed sensor faults -- 2.7. Conclusion -- 2.8. References -- Chapter 3. Gearbox Fault Monitoring Using Induction Machine Electrical Signals

3.1. Introduction -- 3.2. Motor stator current signature approach -- 3.2.1. Air gap magnetic flux density-based approach -- 3.2.2. Magnetizing current approach -- 3.3. Wound rotor current signature approach -- 3.4. Experimental results -- 3.4.1. MCSA for geared motor fault diagnosis -- 3.4.2. MCSA for WT gearbox -- 3.4.3. WT generator current processing -- 3.4.4. Current transformations for geared motor fault diagnosis -- 3.5. Conclusion -- 3.6. Acknowledgments -- 3.7. References -- Chapter 4. Control of a Wind Distributed Generator for Auxiliary Services Under Grid Faults -- 4.1. Introduction