Rhiannon Wind Farm
2,200 MW Cancelled United Kingdom

"The database has become an invaluable tool with regard to business planning and the regular updates from the 4C Offshore team on the project specifics ensure that, as a tier 1 supplier, we remain well informed and able to react to market developments."

Darren Taylor, NKT Cables

Latest Windfarm News
Vattenfall to scrap Yttre Stengrund
Vattenfall has abandoned plans to repower its 10MW Yttre Stengrund offshore wind farm in the Kalmar Sound, Sweden. The company told local media in its home country that it is planning to decommission the project, which was broung online in 2001 and ...
Source: news.google.com
18/09/2014 17:30:53

Global Offshore Wind Market To Reach 40 GW By 2020
“An additional benefit is the fact that future offshore wind power technology development will ensure a decline in the average cost per megawatt, although overall project costs are expected to rise in countries with wind farms planned in deeper water and ...
Source: news.google.com
18/09/2014 16:41:35

Isle of Man picks 1GW team
The Isle of Man says it has decided on preferred bidders for its proposed 1GW offshore wind farm and for more than one tidal energy project in its waters. However, Ken Milne, senior manager for energy policy at the Isle of Man Department for Economic ...
Source: news.google.com
18/09/2014 16:31:00

Vattenfall to shut offshore plant
The plant has been owned by Vattenfall since 2006 and was its first offshore park in Sweden. "Vattenfall invests in wind power wherever it is profitable. So we have chosen to decommission this wind farm prematurely and restore the sea bed and ground ...
Source: news.google.com
18/09/2014 16:08:44

Availon GmbH launches energy management business
Renewable Energy Focus
Availon Energy Management, or AEM, primarily focuses on the calibration and optimisation of wind forecasts, which are in part based on the specific features of the respective wind farms. The standardisation of communications between all areas makes it ...
Source: news.google.com
18/09/2014 15:31:56

New Wind Farm Bearing Monitoring Technology
The Maritime Executive
Ricardo and KONGSBERG have announced that they have signed a framework agreement that will see Ricardo support the development of the Kongsberg Wind Farm Management System (WFMS) as well as related condition monitoring systems for a range of ... found in wind farm supervisory control and data acquisition systems, and offers a modern and intuitive user interface based on KONGSBERG's wide ranging experience in automation and decision support systems for the defense, maritime and offshore oil ...
Source: news.google.com
18/09/2014 16:54:23

Rentocean Selected by Van Oord
Your Renewable News (press release)
The turntable and additional equipment will be used for storage of cables at Eemshaven, The Netherlands for the Gemini Offshore Wind Farm. This will be one of the largest wind farms in the world in terms of size and production. It will be built in the Dutch part ...
Source: news.google.com
18/09/2014 10:42:43

Analysis: What is Siemens doing about onshore wind?
Windpower Monthly (subscription)
A 2.3MW turbine being installed at Whitelee wind farm, Scotland, in 2009 This raises a number of questions. Is all going well? Offshore wind companies are increasingly becoming stand-alone joint ventures, cases in point being MHI Vestas Offshore Wind and ...
Source: news.google.com
18/09/2014 10:15:56

Germany Opens 'Offshore Wind Island'
Industrialinfo.com (subscription)
GALWAY, IRELAND--September 18, 2014 --Written by Martin Lynch, European News Editor for Industrial Info (Galway, Ireland) The German island of Heligoland is fast becoming the hub of German North Sea windfarm development following the official ...
Source: news.google.com
18/09/2014 09:10:49

Renewable energy company vow to restore land in Bicker Fen cable laying plan
Boston Target
A renewable energy company is making moves to address concerns over a bid to lay 40 miles of cable connecting an offshore wind farm to the National Grid. The 60m wide and 40 mile long strip of land to lay the cable for connecting Triton Knoll to the grid is ...
Source: news.google.com
18/09/2014 06:18:50

4C Offshore Ltd. has achieved certification to the ISO 9001, ISO 14001 and OHSAS 18001 standards for quality, environmental, and health & safety management.
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Project Details for Rhiannon Wind Farm
General Information Name Rhiannon Wind Farm correct
Other names Zone 9, Irish Sea South East Potential Development Area, Celtic Array Rhiannon correct
Country name United Kingdom correct
Region Wales, North correct
Comments Multiple offshore HVAC stations.

Not yet determined whether HVDC offshore transmission will be incorporated. It is unlikely that HVDC will be used but it is considered the maximum worst case scenario. A HVAC transmission system would consist of up to 8 HVAC collector substations, AC array cables and up to 12 transmission cables. A HVDC transmission system would consist of up to 8 HVAC collector substations, up to 4 HVDC converter stations, AC array cables, HVAC cables from the HVAC collector stations to the HVDC converter stations and up to 12 transmission cables.

Number of met masts = 1

Turbine numbers 146 x 15MW to 440 x 4 or 5MW. Rotor diamter 140-265, hub height 115-178 and total tip height 185-310.

July 2014 The Crown Estate invited all Round 3 developers to revise the terms of their agreement as the projects transition from zone appraisals to project development. This could mean that zone development agreements are replaced with project specific contractural agreements.
Round (or category) Round 3 correct
Development status Cancelled correct
Comments on the status Cancellation - The developers, Centrica and DONG, and the Crown Estate have agreed that the developers will cease development on the entire zone and terminate their seabed rights. The assessment of the zone has shown challenging ground conditions which using current technology make the project economically unviable. There are no plans to re-offer the zone to the market.

Rhiannon is the first phase, comprising of 4x500MW projects, with FID on the first 500MW in 2016. 18-24 month staggering thereafter.
Power & Turbines Notice any Errors? You can keep this an open resource by submitting corrections!
Project Capacity 2,200 MW correct
Turbine Model Not Decided correct
Turbine Capacity 4 MW - 15 MW correct
Number of Turbines 146 - 440 correct
Total Turbine Height correct
Hub Height 185.00 m correct
Rotor Diameter correct
Foundation Not Decided (Various options under consideration including hybrids.) correct
Windspeed 10 Year Mean Wind Speed (2000-2009) Available online now
Detailed wind speed data 6 hr/day/month historic data
Costs Stated Project Cost correct
Location & Environment Sea name Irish Sea (Irish Sea) correct
Centre latitude 53.675° correct
Centre longitude -4.238° correct
Area 497 km2 correct
Depth range (Chart Datum) 36 m - 66 m correct
Depth range stated by developer 36 m - 83 m correct
Distance From Shore (reported) 19 km correct
Distance From Shore (computed from centre) 29.7 km correct
Ports Installation base correct
Ops and maintenance correct
Grid Converter platforms 4 correct
Offshore transformers 8 correct
Grid connection point Rhosgoch, Anglesey correct
Cable landing point Anglesey between Bull Bay and Port Lynas correct
Export Cables
Please note that export cables connect the offshore transformer (substation) to either; shore or an offshore HVAC-HVDC converter station for onward transmission via HVDC cabling. Please see the converters page for planned converter stations and transmission cables.

The export cable length does not generally include the onshore component. The exception is when the onshore substation is close to shore.
Number of Export Cables 12 correct
Average length per cable 41.08 km correct
Transmission type (e.g. HVAC) correct
Nominal voltage 132 kV correct
Maximum voltage 400 kV correct
Power rating correct
Number of cores correct
Conductor type correct
Section Area correct
Insulation correct
Number fibre optics correct
Export minimum bend radius (MBR) correct
Burial depth correct
Comments 493km of export cabling will be used regardless of using either a HVAC system or a HVDC system. In a HVDC system there will be both HVAC export cabling and HVDC transmission cabling. correct
Onshore Cables Number of onshore cables 30 correct
Average length per cable 0 km correct
Comments Land fall and grid connection point to be decided correct
Array Cables Array cable length 1020 km correct
Estimated cable length LogIn
Transmission type (e.g. MVAC) correct
Nominal voltage correct
Maximum voltage 66 kV correct
Burial depth correct
Number of cores 3 correct
Conductor type Copper correct
Section 1000 mm2 correct
Insulation correct
Power rating correct
Number of fibre optics correct
Minimum bend radius (MBR) correct
Comments correct
Benefits Homes powered annually 1435149 correct
CO2 reduced per year 2900436 tonnes correct
SO2 reduced per year 67452 tonnes correct
Expected life 25.0 years correct
Other Website Visit correct