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Ultra-high Voltage AC/DC Grids

Book Description

The UHV transmission has many advantages for new power networks due to its capacity, long distance potential, high efficiency, and low loss. Development of UHV transmission technology is led by infrastructure development and renewal, as well as smart grid developments, which can use UHV power networks as the transmission backbone for hydropower, coal, nuclear power and large renewable energy bases.

Over the years, State Grid Corporation of China has developed a leading position in UHV core technology R&D, equipment development, plus construction experience, standards development and operational management. SGCC built the most advanced technology 'two AC and two DC' UHV projects with the highest voltage-class and largest transmission capacity in the world, with a cumulative power transmission of 10TWh.

This book comprehensively summarizes the research achievement, theoretical innovation and engineering practice in UHV power grid construction in China since 2005. It covers the key technology and parameters used in the design of the UHV transmission network, shows readers the technical problems State Grid encountered during the construction, and the solution they come up with. It also introduces key technology like UHV series compensation, DC converter valve, and the systematic standards and norms.

  • Discusses technical characteristics and advantages of using of AC/DC transmission system
  • Includes applications and technical standards of UHV technologies
  • Provides insight and case studies into a technology area that is developing worldwide
  • Introduces the technical difficulties encountered in design and construction phase and provides solutions

Table of Contents

  1. Cover image
  2. Title page
  3. Table of Contents
  4. Copyright
  5. Preface
  6. Chapter 1. Grid Development and Voltage Upgrade
    1. 1.1 Grid Development and Interconnection
    2. 1.2 Driver for UHV Transmission Development and Its History
    3. 1.3 Hybrid UHV AC and UHV DC Grid
    4. References
  7. Chapter 2. Characteristics of UHV AC Transmission System
    1. 2.1 Parameters of UHV AC Transmission Lines
    2. 2.2 Transmission Characteristics of UHV AC Transmission Lines
    3. 2.3 Calculation Methods for Stability and Transmission Capability of UHV AC System
    4. 2.4 Influence of System Parameters on Transmission Capability of the UHV AC System
    5. References
  8. Chapter 3. Characteristics of UHV DC Transmission System
    1. 3.1 Basic Principles of HVDC Transmission System
    2. 3.2 Characteristics of UHV DC Transmission System
    3. 3.3 Safety, Stability, and Operation of UHV DC Transmission System
    4. References
  9. Chapter 4. Internal Overvoltages in UHV Grid and Their Suppression
    1. 4.1 Classification of Internal Overvoltages and Overvoltage Level in UHV System
    2. 4.2 Temporary Overvoltage and Its Suppression
    3. 4.3 Secondary Arc Current and Its Suppression
    4. 4.4 Switching Overvoltages and Its Suppression
    5. 4.5 VFTO and Its Suppression
    6. 4.6 Internal Overvoltage of DC Transmission System and Its Suppression
    7. References
  10. Chapter 5. Lightning Overvoltage and Protection of UHV Grid
    1. 5.1 Lightning and Its Main Parameters
    2. 5.2 Lightning Protection for UHV Overhead Transmission Line
    3. 5.3 Lightning Protection of UHV Substation and Converter Station
    4. References
  11. Chapter 6. External Insulation Characteristics and Insulation Coordination of UHV Transmission System
    1. 6.1 Discharge Characteristics of External Insulation
    2. 6.2 Air Gaps of UHV Overhead Transmission Lines
    3. 6.3 Air Gaps in UHV Substations and Converter Stations
    4. 6.4 Selection of UHV Insulators
    5. 6.5 Insulation Level of UHV Electrical Equipment
    6. References
  12. Chapter 7. Electromagnetic Environment in UHV Transmission Projects
    1. 7.1 Overview
    2. 7.2 Electric and Magnetic Fields of UHV Transmission Projects
    3. 7.3 Noise from UHV Transmission Lines
    4. 7.4 RI and TVI of UHV Overhead Lines
    5. 7.5 Corona Losses of UHV Overhead Transmission Lines
    6. References
  13. Chapter 8. Equipment of UHV Overhead Transmission Lines
    1. 8.1 Towers
    2. 8.2 Conductors and Ground Wires
    3. 8.3 Insulators
    4. 8.4 Fittings
    5. References
  14. Chapter 9. UHV Substation and UHV AC Electrical Equipment
    1. 9.1 UHV Substation
    2. 9.2 UHV Transformer and Shunt Reactor
    3. 9.3 UHV Switchgear
    4. 9.4 UHV Series Compensation Devices
    5. 9.5 UHV Surge Arrester
    6. 9.6 UHV Post Insulators and Bushings
    7. 9.7 UHV Voltage Transformer and Current Transformer
    8. 9.8 Seismic Resistance of Major Electrical Equipment in UHV Substation
    9. References
  15. Chapter 10. UHV Converter Station and UHV DC Electrical Equipment
    1. 10.1 UHV Converter Station
    2. 10.2 UHV Converter Valve and Valve Control System
    3. 10.3 UHV Converter Transformer and Smoothing Reactor
    4. 10.4 Filters in UHV Converter Station
    5. 10.5 Surge Arresters in UHV Converter Station
    6. 10.6 UHV DC Post Insulators and Bushings
    7. 10.7 DC Switchgears
    8. 10.8 UHV DC Measuring Devices
    9. 10.9 UHV DC Control and Protection Equipment
    10. References
  16. Chapter 11. Construction of UHV Power Grids in China
    1. 11.1 Forecast of Power Demands
    2. 11.2 Options of Transmitting Power from Large Power Bases
    3. 11.3 Development Pattern of Power Grids in China
    4. References
  17. Chapter 12. UHV Engineering Practices in China
    1. 12.1 UHV AC Transmission Projects
    2. 12.2 UHV DC Transmission Projects
    3. 12.3 UHV Test Facilities
    4. 12.4 Standardization of UHV Transmission Technologies
    5. 12.5 Technological Innovation in UHV Engineering
    6. 12.6 Localization of UHV Equipment and Transport of Large Equipment
    7. References
  18. Appendix A. Technical Data of UHV AC Electrical Equipment
  19. Appendix B. Technical Data of UHV AC Transmission Lines
  20. Appendix C. Main Technical Data of UHV DC Electrical Equipment
  21. Appendix D. Technical Data of UHV DC Transmission Lines
  22. Appendix E. Standards for UHV AC and DC Transmission Technologies
  23. Afterword
  24. Index