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offshore grids for wind power integration - Greenpeace

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executive summary 3<br />

abbreviations 7<br />

1 introduction 8<br />

1.1 objectives 8<br />

1.2 previous studies 9<br />

1.3 approach 10<br />

1.4 guide to the reader 10<br />

2 <strong>wind</strong> <strong>power</strong> in the <strong>power</strong> system:<br />

availability and variability 11<br />

3 methodology 13<br />

3.1 installed <strong>wind</strong> <strong>power</strong> scenario 13<br />

3.2 time series of <strong>wind</strong> speed and <strong>power</strong> 15<br />

4 <strong>offshore</strong> <strong>grids</strong> <strong>for</strong> <strong>wind</strong> <strong>power</strong> <strong>integration</strong> 16<br />

4.1 existing offhore grid concepts 16<br />

4.2 technology 16<br />

4.3 drivers <strong>for</strong> <strong>offshore</strong> grid development 18<br />

4.4 <strong>offshore</strong> grid proposal 19<br />

5 results and analysis 23<br />

5.1 <strong>offshore</strong> <strong>power</strong> generation 23<br />

5.2 <strong>wind</strong> <strong>power</strong> output over time 24<br />

5.3 availability of <strong>wind</strong> <strong>power</strong> generation 25<br />

5.4 variability of <strong>wind</strong> <strong>power</strong> generation 27<br />

6 discussion and conclusions 29<br />

6.1 availability and variability 29<br />

6.2 flexibility 30<br />

6.3 perspectives <strong>for</strong> an <strong>offshore</strong> grid 31<br />

annex 32<br />

references 37<br />

<strong>Greenpeace</strong>, 3E<br />

date August 2008<br />

3E Rue du Canal 61 Vaartstraat, B-1000 Brussels, Belgium<br />

<strong>Greenpeace</strong> Belgium Haachtsesteenweg 159, chaussée de Haecht, 1030 Brussels, Belgium<br />

authors Achim Woyte, Jan De Decker, Vu Van Thong (3E)<br />

acknowledgements The authors thank Abha Sood and Michael Schmidt from For<strong>wind</strong>, Oldenburg<br />

<strong>for</strong> the calculation of the time series of <strong>wind</strong> speed and <strong>power</strong> generation <strong>for</strong> the <strong>wind</strong> farm sites. Frans Van Hulle<br />

from the European Wind Energy Association, Brussels, is acknowledged <strong>for</strong> technical discussion and critical review of the study.<br />

maps Grégory Ignace<br />

design & layout onehemisphere, Sweden, www.onehemisphere.se<br />

printing Imprimerie Massoz, Belgium, www.massoz.be<br />

contact <strong>Greenpeace</strong> Belgium: jputte@be.greenpeace.org<br />

3E: info@3E.eu<br />

<strong>for</strong> further in<strong>for</strong>mation about the global, regional and national scenarios please visit<br />

the energy [r]evolution website: www.energyblueprint.info/<br />

GPI REF JN 035. Published by <strong>Greenpeace</strong> and 3E. Printed on 100% recycled paper created entirely<br />

from post consumer waste, using vegetable oil based inks.<br />

© DREAMSTIME<br />

cover image OFFSHORE WINDFARM, MIDDELGRUNDEN, COPENHAGEN, DENMARK.<br />

image WIND TURBINE.<br />

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