Risk mitigation of new WTG designs beyond 8MW for Offshore Wind Farms

Christian Apeah2 ,1, Matthias Henke 1
1SgurrEnergy, Glasgow UK, UK, 2SgurrEnergy, Hamburg, Germany


Understanding the risks associated with multi-million Euro projects is crucial for the successful development of renewable energy projects. Currently, new WTG designs beyond 8 MW are proposed for Offshore Wind Farms. Development on wind turbine technology has led to such sizes greater 8 MW setting new standards this achievement was done within a reduced amount of developing time. As a result WTGs without a decent proven track record are used for larger offshore wind projects.

Based on actual hands on experience in several offshore wind energy projects around the world as well as individual WTG technology reviews, we have assessed risks related to such concepts. Furthermore SgurrEnergy has investigated mitigation measures to de-risk projects using new and unproven technologies.

It is essential to investigate in the complete picture of the WTG design and set up for project realisation, e.g. technical concepts used, performed tests, manufacturing capabilities of WTG manufacture, certification status etc.



SgurrEnergy has significant experience in providing technical consulting on wind turbine technology used for offshore wind farms for both lenders and investors from our various technical advisory assignments. Furthermore we are able to continually improve the integrity and robustness of our technical assessments from the experience gathered during our construction and operational monitoring of offshore wind farms. Based on our actual hands on experience in several offshore wind energy projects around the world, as well as individual WTG technology reviews, we have assessed risks related to new WTG designs beyond 8 MW and their potential lack of track record and investigated mitigation measures to de-risk such projects.


Throughout the development of WTG technology new concepts, greater rotor diameters and upgrades of existing WTGs are realised. This has in general positive effects facing the energy output of each individual WTG and a decreased number of WTGs needed to realise the wind farms energy output. On the other hand concepts and changes are to enter the marked in a shorter period of time. Highlighted risks and mitigation measures can be used in an early project phase before contracts signing to de-risk a project, making it more favourable for potential investors and equity partners.



Using mitigations presented to lower the potential risk, Offshore Wind Projects using WTGs beyond 8 MW can benefit from this approach as this brings down the contingency sizing and has the potential to bring overall costs down. This becomes more and more important since the development of new wind turbine technology beyond 8 MW accelerates.

The additional effort to implement mitigations at an early stage of the project has the benefit to include those within the contracts of the potential WTG supplier.


Within this presentation, based on latest experience in offshore wind projects, technical knowledge and lessons learned, SgurrEnergy will highlight several areas of potential risks arising through using new WTG design beyond 8 MW for offshore wind farms and their mitigations.

The presentation will enable the audience to better understand potential areas of risks as well as show potential and practical ways to mitigate those to de-risk a project. In addition to this, the audience will learn how to avoid major pit falls by considering the necessary definitions in the individual contracting of a project.