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Delegates are invited to meet and discuss with the poster presenters during the poster presentation sessions between 10:30-11:30 and 16:00-17:00 on Thursday, 19 November 2015.

Lead Session Chair:
Stephan Barth, ForWind - Center for Wind Energy Research, Germany
Hans Verhoef ECN, The Netherlands
Co-authors:
Hans Verhoef (1) F Jan Willem Wagenaar (1)
(1) ECN, Petten, The Netherlands

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Poster

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Abstract

WOZ - A measuring network for determining wind conditions in the Dutch part of the North Sea

Introduction

Wind resource assessments are important for developing offshore wind farms. A more accurate determination of the wind conditions is also of great importance for operating already realized wind farms and for improving the wind atlas, especially for the North Sea.

In this study we present recent developments in increasing the number of measurement stations in the Dutch part of the North Sea for offshore wind farm conditions.



Approach

To increase the number of measurement positions at the North Sea and in particular for the future developments of offshore wind farms in the North Sea we installed LiDAR systems on two additional platforms in the Dutch part of the North Sea. Together with the meteorological Mast IJmuiden a network of measurement stations suitable for offshore wind farms is in operation. Together with floating LiDAR measurement campaigns they provide valuable information for both wind farms developers as well as the government who partly finance these offshore wind farms.

Main body of abstract

In the North Sea there are only a few measurement positions which are specially set-up as measurement positions for the offshore wind industry. By strategic increasing the number of measurement positions with (Floating) LiDAR systems we want to increase the accuracy of measuring wind conditions at the North Sea. The quality of the wind resource assessments for future wind farms will therefore also increase. As a result the accuracy of the data will increase which will have an effect on the reliability of the bankable data.
At the present moment there is only one fully operational offshore meteorological mast in the Dutch part of the North Sea fully equipped for measuring the wind conditions. This is the meteorological Mast IJmuiden which is located 75 km from the coast of the Netherlands. Besides the mast also a LiDAR system is installed at this location. Furthermore last year a LiDAR system is installed at a platform much closer to the Dutch coast (Lichteiland Goeree - LEG). By using these two positions a better and more accurate insight could be given in the wind conditions for the future offshore wind farms the Dutch government is planning.
We investigated the effect of strategic increasing the number of measurement positions with an additional LiDAR system on Europlatform (EPL), a platform 45 km from the Dutch coast and the effect this could have on bankable data. Furthermore as a result we used this input also for a better wind atlas.


Conclusion

With this study we show that for bankable data real measurements are of great importance. The effect of strategic increasing the number of measurement locations at the Dutch part of the North Sea is presented in the sense of better bankable data and a better and more accurate wind atlas for the North Sea.


Learning objectives
The learning objectives of this study are summarized as follows:
• Improvement of high quality wind condition measurements at the North Sea
• Input for (Dutch) North Sea wind atlas