Wind Power | Rodsand I and Rodsand II Offshore Wind Farms

Another new offshore wind development was brought online recently in the Baltic Sea furthering the push to send wind power into the sea. Rodsand II, with installed capacity of 207 MW, came into operation in Oct 2010. It is one of the largest offshore wind farms in the world. Rodsand II is located in the Baltic Sea off the Danish island of Lolland, is just two miles away to the east of the existing 166MW Rodsand I.

The Wind Farm covers an area of 35 square km and consists of 90 2.3MW turbines. Each turbine has a hub height of 68.5m and a rotor blade diameter of 93m. The turbines are connected with 33kV underwater cables that are connected to the substation. Onshore cables are 132kV connecting to the energy company SEAS-NVE’s grid.

E.ON Climate Renewables, the developer of Rodsand II, has invested about €400 million ($554 million) in this wind farm. Offshore Wind is a strategic focus of E.ON’s renewable business. The development of Rodsand, like other Danish offshore projects, was sponsored by the Danish government.

The new wind farm aids to the country’s offshore green energy capacities. It will produce 800 million kilowatt hours per year, and provide as much as 200,000 homes Danish households with green energy. With the inauguration of Rodsand 2, the country’s offshore capacity rose to almost 720 megawatts, according to the Danish Energy Agency. Offshore wind farm development continues to move forward, with Denmark, Germany and the United Kingdom leading the way.

Rodsand II follows Rodsand I (also known as The Nysted Wind Farm), a 166 MW wind plant that began operating in 2003. Rodsand I is a Danish offshore wind farm close to the Rodsand sand bank near Lolland.

The Nysted Wind Farm was built in 2003 using Gravity base foundations rather than piles. The wind farm is made up of eight rows of nine turbines of 2.3 MW each. The turbine tower itself is 69 metres high. Each blade is 40 metres long. At its highest, the tip of the blade reaches a height of 110 metres.

The Nysted Wind Farm has a total capacity of 166 MW and annually generates enough power to supply 145,000 family homes with non-polluting energy. It saves 500,000 tonnes of CO2 emissions.

Denmark is looking to increase the share of wind power in the electrical supply, which is crucial to its obligations under the Kyoto Protocol and EU renewable energy requirements. Denmark has been a pioneer in developing commercial wind power during the 1970s, and today almost half of the wind turbines around the world are produced by Danish manufacturers such as Vestas and Siemens. The country also wants to reduce dependence on fossil fuels long term. The climate and energy minister of Denmark Lykke Friis, says “The government plans to transform the country into one free of fossil fuels by 2050”.

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