21-large wind power plant in Småland gives car manufacturer Volvo fresh energy
As the Swedish power company announced on Wednesday, construction has begun on the 21 wind turbines for the new wind power field not far from the small community of Bruzaholm in the north of the forest and marshland province of Småland. The plan was to install Siemens Gamesa SG 6.6-170 turbines with a rated output of 6.6 megawatts (MW) and a rotor diameter of 170 meters. Vattenfall had designed the total rated output at 138.6 MW, or just under 140 MW. The Swedes no longer disclosed the turbine type in their press release. The first three lower tower segments for several of these turbines have already been erected. The company explained that the rotor blade length is 83 meters, which corresponds to the 83.3 meters specified by the supplier LM.
The wind farm will be equipped with a battery with a storage capacity of 38 MW and a capacity of 38 megawatt hours (MWh). Vattenfall intends to use this to stabilize the wind power supply, which is expected to reach 460 gigawatt hours per year, or 1,260 MWh daily and just under 53 MWh hourly. This would allow, for example, electricity to be supplied for one hour during calm periods, similar to a high level of generation at 70 percent partial load, or to increase the power supply to 70 percent for three and a half hours during periods of only moderate half-capacity due to weak winds.
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Such calculations may indicate the goal of the Swedish electricity marketing company. It regulates the sale of electricity to industrial companies through long-term power purchase agreements, known as PPAs in international jargon. However, the additional sale of green electricity certificates to companies that needed these certificates as part of the legally prescribed marketing of renewable energy plants and to offset their corporate emissions ended in 2022.
The Swedish car manufacturer Volvo will purchase 50 percent of the generation from Vattenfall's new wind farm in northern Småland for its own needs over a period of ten years. Both parties announced this PPA in a letter of intent in 2023.
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