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Conference programme 

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Poster session

Lead Session Chair:
Stephan Barth, Managing Director, ForWind - Center for Wind Energy Research, Germany
Jacques Barreau Nass&Wind Offshore, France
Co-authors:
Jacques BARREAU (1) F P
(1) Nass&Wind Offshore, Lorient, France

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Poster
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Presenter's biography

Biographies are supplied directly by presenters at OFFSHORE 2015 and are published here unedited

With more than 20 years of experience in industrial project development, Jacques BARREAU works now since 2008 in the offshore wind business as Development Director of Nass&Wind Offshore. He has managed in France the development of several sites dedicated to offshore wind farms and MRE projects.

Abstract

The m3ea project : a new large floating platform dedicated to lidar and environmental measurements

Introduction

The cost of energy reduction is probably the most important factor of success for the European offshore wind industry. One of the upstream key parameter that allows to optimize and reduce the LCOE (Levelized Cost of Energy), is a high quality wind measurement campaign.


Approach

However, the offshore wind farms projects are implemented on deeper and deeper sites. An alternative to offshore met mast must be found with two main prerequisites: cheaper cost and equal quality of data compared with those provided by conventional offshore met masts.


Main body of abstract

For more than 2 years now, Nass&Wind Offshore has launched an internal R&D program that aims to design an innovating floating platform dedicated to LIDAR wind measurements and other environmental parameters. In particular, we have designed a large floating platform in order to welcome easily many environmental instruments in addition to the LiDAR system. The platform key features can be summarized as follow:

- A large float : 70 tons, 12m of diameter with natural stability and an easy access for maintenance,
- A powerful and autonomous electrical system : 4 wind turbines, 18 solar panels, a 5KW diesel generator and a 1000 Ah batteries pack,
- A large and flexible instrumentation deck: 17m² available to welcome the LiDAR and many other instruments on demand. The platform can then be considered as a real floating and flexible offshore laboratory.

Concerning the wind measurements, the platform reaches 8 months testing period in our test site located in the north of French coasts, and it is still in operation. A critical analysis of the recorded data and the floating platform performances has been done in compliance with offshore measurement standards (the test protocol is based on the Carbon Trust offshore wind accelerator roadmap for the commercial acceptance of floating LiDAR technology).

Wind measurements have been analyzed by DNV GL and results are in accordance with relevant industry standards: “M3EA is able to reproduce onshore LiDAR wind speeds and wind directions at a very accurate and acceptable level”.


Conclusion

The coming floating LiDAR systems must reach the same level of accuracy compared to the conventional offshore met masts. In addition, the ability to use a floating platform as a real on-site environmental laboratory could bring new long terms and cost effective data for the environmental studies.

The presentation will especially focus on:

- The platform presentation and key features,
- The methods used to obtain a good level of quality and availability for the LiDAR measurements,
- The results of the 8 months testing campaign.



Learning objectives
The presentation should mainly interest all the developers, utilities and turbine manufacturers who want to better understand the measurements methods and principles that should lead, in a very close future, to bankable wind data and environmental data acquisition on a floating platform as a real alternative to conventional offshore met masts.