Table of Contents

Cover image

Title page

Related titles

Copyright

List of contributors

Woodhead Publishing Series in Energy

Acknowledgments

Part One. Introduction to offshore wind energy and offshore wind farm siting

1. Introduction to offshore wind energy

1.1. Wind energy

1.2. Offshore wind farm

1.3. Energy cost

1.4. Wind turbines

1.5. Disputable issues

2. Economics of building and operating offshore wind farms

2.1. Introduction

2.2. Investment costs

2.3. Operating costs

2.4. Key economic drivers for offshore wind energy

2.5. Levelised cost of energy

2.6. Future cost of offshore wind

2.7. Conclusions

3. Wind resources for offshore wind farms: Characteristics and assessment

3.1. Key issues in assessing wind resources

3.2. The nature of the offshore wind environment

3.3. Essential data parameters

3.4. Observational approaches

3.5. Modeling approaches

3.6. Future trends

Abbreviations

4. Remote sensing technologies for measuring offshore wind

4.1. Introduction

4.2. Conventional methods

4.3. Surface-based remote sensing

4.4. Space-borne RS

4.5. Case study – a near-coastal wind farm project

4.6. Future trends

Sources of further information

Abbreviations and Acronyms

Part Two. Wind turbine components and design

5. Developments in materials for offshore wind turbine blades

5.1. Key requirements for blade materials

5.2. Role of testing materials and structures in the blade design process

5.3. Case study on material selection and blade design

5.4. Future trends

Abbreviations and nomenclature

6. Design of offshore wind turbine blades

6.1. Introduction

6.2. Aerodynamics

6.3. Materials

6.4. Structural design

6.5. Manufacture

Nomenclature

7. Wind turbine gearbox design with drivetrain dynamic analysis

7.1. Introduction

7.2. WTGS gearbox design – concept stage

7.3. WTGS gearbox design – development stage

7.4. WTGS gearbox design – production stage

7.5. Drivetrain dynamic analysis

7.6. Conclusions

8. Design of generators for offshore wind turbines

8.1. Introduction: key issues in generator design

8.2. Electrical generators: types and principles of operation

8.3. Practical design and manufacture of electrical generators

8.4. Selection of generators for offshore wind turbines

8.5. Future trends in offshore wind turbine generators

Sources of further information

9. Modelling of power electronic components for evaluation of efficiency, power density and power-to-mass ratio of offshore wind power converters

9.1. Introduction

9.2. Semiconductors and switch valves

9.3. Filter inductors

9.4. Filter capacitors

9.6. Evaluation example of a 1-MW 2L-VSC

Nomenclature

10. Design of offshore wind turbine towers

10.1. Introduction

10.2. Function and types of towers

10.3. Standards of reference

10.4. Design spiral process and loads' analysis

10.5. Shell and flange sizing

10.6. Secondary steel, other structure details, and coatings

10.7. Optimization considerations

10.8. Final remarks

Glossary

List of symbols

List of greek symbols

11. Design of floating offshore wind turbines

11.1. Introduction

11.2. Design of floating offshore wind turbines: main preliminary steps

11.3. Key issues in design of floating offshore wind turbines

11.4. Summary: case study

11.5. Future trends

Nomenclature

Sources of further information

Part Three. Integration of wind farms into power grids

12. Offshore wind farm arrays

12.1. Fundamentals of offshore wind farm arrays

12.2. Design considerations

12.3. Main electrical components

12.4. Topologies

12.5. Converter interface arrangements and collector design

12.6. Wake farm arrangement – wake effects

12.7. Control objectives

12.8. Collector design procedure

Abbreviations

13. Cabling to connect offshore wind turbines to onshore facilities

13.1. Introduction

13.2. Offshore wind farm cables

13.3. Offshore cable installation, protection and challenges

13.4. Dynamic cables for floating wind turbines and substations

13.5. Some mechanical aspects of subsea cables

13.6. Outlook for offshore wind farm cables

Abbreviations

14. Integration of power from offshore wind turbines into onshore grids

14.1. Introduction

14.2. Wind farm collection systems

14.3. Offshore wind power transmission systems

14.4. Voltage source converters

14.5. Development of future submarine power transmission schemes

14.6. Conclusions

15. Energy storage for offshore wind farms

15.1. Introduction

15.2. The storage technologies

15.3. Indicative case studies: S-PSSs in Rhodes and Astypalaia

15.4. Conclusions

Abbreviations

16. Hydropower flexibility and transmission expansion to support integration of offshore wind

16.1. Introduction

16.2. Technologies

16.3. Summary – case study

16.4. Scenarios

16.5. Results

16.6. Conclusions

Part Four. Installation and operation of offshore wind farms

17. Assembly, transportation, installation and commissioning of offshore wind farms

17.1. Introduction

17.2. Delivery of components

17.3. Onshore assembly

17.4. Offshore transport

17.5. Offshore installation

17.6. Tests and commissioning

17.7. Conclusions and future trends

18. Condition monitoring of offshore wind turbines

18.1. Reliability of offshore wind turbines

18.2. Challenges in offshore wind turbine operation and maintenance

18.3. Offshore wind turbine condition monitoring techniques

18.4. Offshore wind turbine condition monitoring systems

18.5. Signal processing techniques used for WT CM

18.6. Existing issues and future tendencies of WT CM

19. Health and safety of offshore wind farms

19.1. Limits of this chapter

19.2. Introduction

19.3. Legal framework

19.4. Safety management system

19.5. Plan, do, check, act

19.6. The offshore renewable energy industry

19.7. Plan

19.8. Do

19.9. Check

19.10. Act

19.11. For the future

19.12. Conclusion

Abbreviations

20. Offshore wind turbine foundations – analysis and design

20.1. Foundation options for offshore wind-turbine structures

20.2. System of loading on offshore foundations

20.3. General aspects of OWT monopile foundation system

20.4. Offshore design codes and methods

20.5. Investigation of monopile–soil behaviour

20.6. Design of OWT foundation

20.7. Future outlook and research needs

Nomenclature

Abbreviations

Index

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