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ABB commissions Thornton Bank wind farm connection in the North Sea
325 MW of wind energy integrated into the Belgian grid

At the end of June this year, the last of 54 wind turbines was installed at the C-Power offshore wind farm at Thornton Bank off the coast of Ostend. The project began in 2008, with phase one in which six turbines with a total capacity of 30 megawatt (MW) were installed 30 kilometers (km) off the Belgian coast. By 2009, these turbines were generating electricity and had been temporarily connected to the mainland by ABB. Work then began on the second and third phases of the project, which involved the addition of 48 wind turbines to the wind farm and the permanent connection of the complete wind farm to the mainland. This was done via an alternating current (AC) subsea transmission link. ABB (NYSE: ABB) commissioned the project ahead of schedule.

Thornton Bank is now one of the largest offshore wind farms in Europe, with an overall capacity of 325 MW. A submarine cable system comprises 60 km of 36 kilovolt (kV) infield cables link the turbines to a substation close to the turbines offshore. The substation collects and transmits the power to the coast. It is a large four-deck structure weighing some 2,000 tons. It comprises two power transformers, gas-insulated switchgear for incoming and outgoing current, shunt reactors to provide reactive power compensation, neutral grounding reactors to limit the current in case of a fault, and substation protection and control systems.

The wind turbines deliver 33 kV, which is stepped up by the transformers to 150 kV. Two 170 kV export cables transfer the power from the substation to shore. At the onshore cable landing point the export cables are joined to two 170 kV underground cables, which deliver the power to the Slijkens substation, about 3 km inland. At Slijkens the electricity joins the Belgian grid.

Thornton Bank offshore substation“ABB was selected by C-Power for the project because it could provide the complete offshore wind power connection to ensure the safe and reliable delivery of energy from the wind farm to the onshore transmission grid,” said Geert Dewaele, Chief Technical Officer of C-Power.

ABB is the only company that can provide a complete electrical offshore wind farm connection consisting entirely of its own products – high-voltage submarine and underground cable systems, offshore substation and onshore grid connection. By providing all the products ABB was able to optimize the solution in terms of equipment and materials to meet the requirements of C-Power for cost efficiency and performance.

ABB was contracted at an early stage of the project to help develop the overall wind farm concept and perform the electrical system studies to ensure grid code compliance. All the electrical and controls systems are designed and manufactured by ABB to meet the demanding requirements and harsh operating conditions of offshore wind farms.

The Thornton Bank wind farm was inaugurated today by the Belgian Prime Minister Elio Di Rupo, adding more than 1,000 gigawatt-hours (GWh) of electricity generation capacity per year to the Belgian grid. This is the equivalent to the annual power consumption of about 300,000 households in Belgium. The wind farm will contribute approximately 7 percent of Belgium’s targeted renewable energy commitment by 2020 and help avoid CO2 emissions of approximately 415,000 tons per year if the electricity were to be generated by a traditional gas-fueled power plant.

"We are proud that ABB has been able to contribute successfully to more sustainable energy production," said Hanspeter Faesler, head of ABB’s Grid Systems business within the Power Systems division.

Source: Hanspeter Faesler
ABB Power Systems
September 23, 2013

Bilder ABB unter Eigene Dateien

 





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