1st Edition

Wind Energy Systems Solutions for Power Quality and Stabilization

By Mohd. Hasan Ali Copyright 2012
    287 Pages 140 B/W Illustrations
    by CRC Press

    287 Pages 140 B/W Illustrations
    by CRC Press

    Unlike conventional power plants, wind plants emit no air pollutants or greenhouse gases—and wind energy is a free, renewable resource. However, the induction machines commonly used as wind generators have stability problems similar to the transient stability of synchronous machines. To minimize power, frequency, and voltage fluctuations caused by network faults or random wind speed variations, control mechanisms are necessary. Wind Energy Systems: Solutions for Power Quality and Stabilization clearly explains how to solve stability and power quality issues of wind generator systems.

    Covering fundamental concepts of wind energy conversion systems, the book discusses several means to enhance the transient stability of wind generator systems. It also explains the methodologies for minimizing fluctuations of power, frequency, and voltage.

    Topics covered include:

    • An overview of wind energy and wind energy conversion systems
    • Fundamentals of electric machines and power electronics
    • Types of wind generator systems
    • Challenges in integrating wind power into electricity grids
    • Solutions for power quality problems
    • Methods for improving transient stability during network faults
    • Methods for minimizing power fluctuations of variable-speed wind generator systems

    This accessible book helps researchers and engineers understand the relative effectiveness of each method and select a suitable tool for wind generator stabilization. It also offers students an introduction to wind energy conversion systems, providing insights into important grid integration and stability issues.

    Why Renewable Energy
    Wind Energy
    Advantages and Disadvantages of Wind-Generated Electricity
    Worldwide Status of Wind Energy
    Aim and Scope of the Book

    Wind Energy Conversion System
    Fundamental Concept
    Wind Energy Technology
    Basic Components of a Wind Turbine System
    Types of Wind Turbines
    Modeling of Wind Turbine
    Chapter Summary

    Electric Machines and Power Systems
    DC Machines
    AC Machines
    Electrical Power Systems
    Power Quality
    Chapter Summary

    Power Electronics
    Power Devices
    Pulse Width Modulation Scheme
    Current Source Inverter
    Chapter Summary

    Wind Generators
    Fixed-Speed Wind Energy Conversion Systems
    Variable Speed Wind Energy Conversion Systems
    Wind Generators
    Wind Generator Characteristics
    Maximum Power Point Tracking System
    WG Total Efficiency Calculation
    Chapter Summary

    Wind Generator Grid Integration Issues
    Transient Stability and Power Quality Problems
    Variability of Wind Power
    Power, Frequency, and Voltage Fluctuations Due to Random Wind Speed Variation
    Grid Connection Requirements
    Design and Operation of Power Systems
    Storage Options
    Grid Infrastructure
    Wind Power’s Contribution to System Adequacy
    Chapter Summary

    Solutions for Power Quality Issues of Wind Generator Systems
    Various Energy Storage Systems
    Energy Storage Systems Compared
    Using SMES to Minimize Fluctuations in Power, Frequency, and Voltage of Wind Generator Systems
    Power Quality Improvement Using a Flywheel Energy Storage System
    Constant Power Control of DFIG Wind Turbines with Supercapacitor Energy Storage
    Output Power Leveling of Wind Generator Systems by Pitch Angle Control
    Chapter Summary

    Solutions for Transient Stability Issues of Fixed-Speed Wind Generator Systems
    Model System
    Pitch Control Method
    Superconducting Magnetic Energy Storage Method
    Static Synchronous Compensator (STATCOM) Method
    Braking Resistor Method
    Superconducting Fault Current Limiter Method
    Stabilization Methods Compared
    Chapter Summary

    Fault Ride-Through Capability of Variable-Speed Wind Generator Systems
    Doubly Fed Induction Generator Systems
    Wound Field Synchronous Generator Systems
    Permanent Magnet Synchronous Generator Systems
    Switched Reluctance Generator System
    Chapter Summary


    Mohd. Hasan Ali received a BScEng in electrical and electronic engineering from Rajshahi University of Engineering and Technology (RUET), Bangladesh, in 1995, and an MScEng and PhD in electrical and electronic engineering from Kitami Institute of Technology, Japan, in 2001 and 2004, respectively. Currently, he is working as an assistant professor at the electrical and computer engineering department of the University of Memphis, Tennessee. Ali’s research interests include power system dynamics, stability and control, smart-grid and micro-grid power systems, renewable energy systems, energy storage systems, electric machines and motor drives, application of power electronics to power systems, flexible alternating current transmission systems (FACTS) devices, and application of fuzzy logic control to power systems. He has authored and coauthored more than 100 publications, including journal and conference papers. Ali is a senior member of the IEEE Power and Energy Society.