Efficient Offshore wind implementation Dr. Alf Bjørseth
Offshore wind Europe from 1 GW to 10 GW in 10 years The TheOpportunity Opportunity ••Offshore Offshorewind windhas hasgreat greatgrowth growth prospects prospects ••UK, UK,Dk Dk&&No Nohave havethe thebest bestoffshore offshore wind windresources resources ••UK UK&&No Nohave havesubstantial substantialoffshore offshore knowledge knowledgeand andindustry industrybase base ••Subsea Subseacable cabletechnology technologyininSS(ABB) (ABB) and andNo No(Nexan) (Nexan) The TheChallenge Challenge ••How Howtotoprovide provideenergy energysecurity; security; reliable reliableenergy energysupply supplywhen whenthere’s there’sno no wind wind ••How Howtotocost costefficiently efficientlyinstall installoffshore offshore wind windturbines turbines
Forecast offshore wind
Source: The World Offshore Wind Report 2011 – 2015 Douglas- Westwood
Norwegian hydro electric capacity as battery Red= under construction Yellow = in operation •• Norway large hydrolelectric White = Suggested/planning Norwayhas has large hydrolelectricstorage storagecapacity capacity––easy easytoto
regulate regulate •• Existing Existingplans plansfor for6000 6000MW MWdirect directexchange exchangecapacity capacitywith withthe the UK UKand andEU EUinin2020 2020 •• The TheUK UKcabel cabelisisplanned plannedatat1400MW 1400MW
•• Extended Extended”battery”capacity ”battery”capacityvery verygood good
•• Requires Requiresmore morecables cablesand anddedicated dedicatedpump pumpstorage storagepower powerstations. stations.
•• Challenges; Challenges;
•• Willingness Willingnesstotopay payfor for”battery ”batterycapacity” capacity” •• Requires Requiresupgrade upgradetotonext nextgeneration generationhigh highvoltage voltagepower powergrid gridininSouthern Southern Norway Norway (420 (420kV) kV) •• Huge Hugeload loadvariations variations++multiple multiplesources sourcesand andcables cablesrequire requirehigh highlevel levelofof systems systemsmanagement managementininNorway Norway
Source: Statnett 2010
The Technology is available •• Focus Focuson ondesign designand andinstallation installationofof offshore offshorewind windfoundations foundations •• Main Mainshareholder shareholderininOwec OwecTower Tower––sub sub sea seastructure structurefor fordepth depth<100 <100mm •• Pilots Pilotsinstalled installedininBeatrice BeatriceField, Field,UK UKsector sector
•• Installed Installed66jackets jacketsatatAlpha AlphaVentus Ventus •• Pre-piled Pre-piledjackets jackets(first (firstininthe theWorld) World) •• 45 45km kmoffshore offshorecoast coastofofGermany Germany •• 55MW MWturbines turbines •• Depths Depthsofof26 26--32 32meters meters
Alpha Ventus off the coast of Germany – September 09 5 MW turbines – 45 km offshore, 30 meters depth Current concept • Significant operational limitations due to weather dependency • Available tonnage either large and expensive or small and inefficient • Logistical challenges result in low capacity and increased complexity
NorWind Installer has designed and intends to build a dedicated installation vessel Alpha Ventus learnt us that dedicated vessels are needed Main advantages are:
•Cutting installation cost by 50 % •Designed for all-year operation •1 vessel will replace the 11 different vessels used for Alpha Ventus
… have designed a dedicated installation vessel that meets objectives