Back to the programme printer.gif Print




Delegates are invited to meet and discuss with the poster presenters in this topic directly after the session 'On- and off-shore installation technologies' taking place on Wednesday, 12 March 2014 at 11:15-12:45. The meet-the-authors will take place in the poster area.

Fiona Buckley Tractebel Engineering S.A., Belgium
Co-authors:
Fiona Buckley (1) F P Hervé Macau (1) Thomas Tryhoen (1)
(1) Tractebel Engineering S.A., Brussels, Belgium

Printer friendly version: printer.gif Print

Presenter's biography

Biographies are supplied directly by presenters at EWEA 2014 and are published here unedited

Fiona Buckley is Product Manager Offshore Wind and Marine Energies at Tractebel Engineering.
She graduated as a Maritime Engineer followed by a Masters in Applied Physical Oceanography.
She has been working in the renewable energy sector for over 10 years and in the offshore wind
industry for over 7 years.
Making profit her experience in managing different kind of projects with multiple stakeholders,
ranging from the management of Multiple EPC, EPC and EPC-M projects, Fiona has participated
in the conception and realisation of different marine and offshore wind projects in Europe and Latin America.

Abstract

Overview of main challenges, expectations and future project solutions for floating wind turbines

Introduction

Floating wind is considered as the breakthrough to overcome foundations costs related to offshore wind in deep locations (either near or far shore).
Over 50 GW of offshore wind projects in deep waters between 40 and 60 meters are in planning, with permits submitted or approved. This figure is only for Europe and the US but if we take into account the rest of the world, the opportunities are more than ten times higher.


Approach

Due to the harsh environment but also the maturity level of the technology, the main challenge to overcome for floating wind is hydrodynamic stability. Different support structures types are currently being tested:
- The ballast-stabilised “Spar”
- The mooring-line stabilised or Tension Leg Platform “TLP”
- The buoyancy-stabilised or semi-submersible “semi-sub”

These different support structures types are under appraisal in different power generators configurations:
- Vertical axis
- Upwind
- Downwind
- 2-blades
- Multiple turbines
- Cluster solutions (combination wind & wave or wind & aquaculture)


Main body of abstract

Although the majority of the concepts use the “classic wind” configuration (vertical, 3 blades, upwind), no single optimised solution has yet been identified. In addition to this, the configurations vary even more as foundations can be offered as “full package” i.e. a single specific turbine or as “separate package” with a turbine selected by the project developer.
Out of the thirtyish, mainly European, concepts currently identified from concept to full-scale pilot, to date, only 2 full-scale pilots and 11 smaller scale prototypes are deployed offshore. The two most advanced prototypes both in the 2MW range are being backed by utilities.
In addition to this, to overcome installation costs, the industry is even developing floating transmission solutions.
But to date, what is the return on experience, how does the industry foresee installation and O&M, what has been done to overcome specific challenges such as park configuration, fatigue, electrical connection etc.? Are there other challenges that have not yet investigated?


Conclusion

Fixed offshore wind is at present more and more considered as a mature technology, even with the continuous challenges that it faces. What will be the future of the floating wind technology and can fixed offshore serve as a figurehead? Siemens just announced a 30% reduction in offshore wind turbines by 2020.


Learning objectives
Can this be affected to also touch floating wind? Will the floating industry as a whole achieve the expected 15% of new commercial offshore as floating projects by 2025?
These, among many others, are the questions with their respective answers that Tractebel Engineering will cover.