Page 14 - Advances in Renewable Energies and Power Technologies

Contents xiii

1.2 Structure ............................................................... 462
1.3 Doubly Fed Induction Generator Singularities.............. 464
2. Modeling .................................................................... 465
2.1 Doubly Fed Induction Machine................................. 465
2.2 The Static Model.................................................... 467
2.3 The Dynamic Modeling ........................................... 470
2.4 Model for Grid Disturbances .................................... 472
3. Control System ............................................................ 476
3.1 Vector Control........................................................ 477
3.2 Control of Grid Side Converter ................................. 477
3.3 Control of Rotor Side Converter................................ 478
4. Power Electronic Converters........................................... 480
4.1 The Back-to-Back Voltage Source Converter............... 480
4.2 The Crowbar and the Chopper .................................. 481
4.3 New Trends/Novel Structures.................................... 482
5. Low-Voltage Ride-Through............................................ 483
5.1 Effects of Voltage Dip on Doubly Fed Induction
Generator .............................................................. 483
5.2 Grid Code Requirements.......................................... 486
5.3 Crowbar Protection ................................................. 487
5.4 Complementary Protection ....................................... 487
5.5 Alternative Solutions............................................... 488
References....................................................................... 489
CHAPTER 16 Modeling and Characterization of a Wind
Turbine Emulator................................................ 491
Imene Yahyaoui, Alvaro S. Cantero
1. Introduction................................................................. 491
2. Description and Qualities of Wind Energy........................ 492
2.1 Definition of Wind Energy ....................................... 492
2.2 Main Components of the Wind Turbine...................... 493
3. Types of Wind Turbines................................................. 494
3.1 Vertical-Axis Wind Turbines..................................... 494
3.2 Horizontal-Axis Wind Turbines................................. 495
4. Modeling of the Wind Turbine........................................ 495
5. Principle of Wind Turbine Emulator ................................ 499
5.1 Modeling and Simulation of the Wind Emulator .......... 500
5.2 Mechanical Speed Control........................................ 502
6. Results and Interpretations ............................................. 502
7. Conclusion.................................................................. 507
References....................................................................... 507
Index...................................................................................................509