DescriptionThe book presents the latest power conversion and control technology in modern wind energy systems. It has nine chapters, covering technology overview and market survey, electric generators and modeling, power converters and modulation techniques, wind turbine characteristics and configurations, and control schemes for fixed- and variable-speed wind energy systems. The book also provides in-depth steady-state and dynamic analysis of squirrel cage induction generator, doubly fed induction generator, and synchronous generator based wind energy systems.
To illustrate the key concepts and help the reader tackle real-world issues, the book contains more than 30 case studies and 100 solved problems in addition to simulations and experiments. The book serves as a comprehensive reference for academic researchers and practicing engineers. It can also be used as a textbook for graduate students and final year undergraduate students.
List of Symbols.
Acronyms and Abbreviations.
1.2 Overview of Wind Energy Conversion Systems.
1.3 Wind Turbine Technology.
1.4 Wind Energy Conversion System Configurations.
1.5 Grid Code.
2. Fundamentals of Wind Energy Conversion System Control.
2.2 Wind Turbine Components.
2.3 Wind Turbine Aerodynamics.
2.4 Maximum Power Point Tracking (MPPT) Control.
3. Wind Generators and Modeling.
3.2 Reference Frame Transformation.
3.3 Induction Generator Models.
3.4 Synchronous Generators.
4. Power Converters in Wind Energy Conversion Systems.
4.2 AC Voltage Controllers (Soft Starters).
4.3 Interleaved Boost Converters.
4.4 Two-Level Voltage Source Converters.
4.5 Three-Level Neutral Point Clamped Converters.
4.6 PWM Current Source Converters.
4.7 Control of Grid-Connected Inverter.
5. Wind Energy System Configurations.
5.2 Fixed Speed WECS.
5.3 Variable Speed Induction Generator WECS.
5.4 Variable-speed Synchronous Generator WECS.
6. Fixed-Speed Induction Generator WECS.
6.2 Configuration of Fixed-Speed Wind Energy Systems.
6.3 Operation Principle.
6.4 Grid Connection with Soft Starter.
6.5 Reactive Power Compensation.
7. Variable-Speed Wind Energy Systems with Squirrel Cage Induction Generators.
7.2 Direct Field Oriented Control.
7.3 Indirect Field Oriented Control.
7.4 Direct Torque Control.
7.5 Control of Current Source Converter Interfaced WECS.
8. Doubly-Fed Induction Generator Based WECS.
8.2 Super- and Sub-synchronous Operation of DFIG.
8.3 Unity Power Factor Operation of DFIG.
8.4 Leading and Lagging Power Factor Operation.
8.5 A Steady-State Performance of DFIG WECS.
8.6 DFIG WECS Start-up and Experiments.
9. Variable-Speed Wind Energy Systems with Synchronous Generators.
9.2 System Configuration.
9.3 Control of Synchronous Generators.
9.4 SG Wind Energy System with Back-to-back VSC.
9.5 DC/DC Boost Converter Interfaced SG Wind Energy Systems.
9.6 Reactive Power Control of SG WECS.
9.7 Current Source Converter Based SG Wind Energy Systems.
Appendix A. Per Unit System.
Appendix B. Generator Parameters.
Appendix C. Problems and Answers Manual.
"Considering that the wind energy is now highly competitive and is being emphasized all over the world, this book is extremely important and very timely. It is expected to be of wide demand in the world. The book is of unique quality, and no such book currently exists in the market. The primary emphasis of the book is power conversion and control of wind energy conversion systems. It gives comprehensive and in-depth analysis on wind generators, power converters and control systems of various types of wind generation systems. There are adequate explanatory materials on different types of wind turbines, and basics of wind energy systems. The book is very well-organized with physical explanations, mathematical analysis, computer simulation, experimental results, and worked-out examples. There are a large number of worked-out problems at the end of the book which are extremely important. It is a unique book with optimal balance of theory and practical discussion. It is a complete book for designers of wind generation systems and can serve as textbook for undergraduate/graduate courses in universities.
—Dr. Bimal K. Bose, Condra Chair of Excellence/Emeritus in Power Electronics, University of Tennessee