Minnesota Power, a division of ALLETE, Inc. (NYSE: ALE) has reached a significant milestone in its energy supply diversification strategy with the completion of phases two and three of the company’s Bison Wind Energy Center. The 210-megawatt (MW) renewable energy installations near New Salem, N.D., are now operational and the commissioning process has been completed.
Bison 2 and 3 consist of 70 wind turbine generators, each capable of producing three MW of electric power by way of direct-drive turbines manufactured by Siemens AG. The turbines are installed atop 265-foot towers in south-central North Dakota.
“Like our nation, our company is in the midst of a major transition to ensure a more balanced energy supply,” said Alan R. Hodnik, ALLETE chairman, president and chief executive officer. “Investment in cost-effective emission-free wind energy is an important component of ALLETE’s overall growth strategy to meet the needs of a changing energy landscape.”
Minnesota Power is moving the wind energy from North Dakota to Duluth, Minn., over a 465-mile direct current transmission line that the company purchased in 2009. That purchase enabled Minnesota Power to phase out a long-term contract to buy coal-based electricity from the Young Station in Center, N.D., and replace it with wind energy.A meticulous commissioning process for Bison 2 and 3 involving personnel from Minnesota Power and Siemens was completed this week. The final stage of the launch involves control testing that demonstrates that the Bison project can function as a “wind park,” with all three phases working together. MISO, a regional organization overseeing electric transmission in 11 U.S. states and Manitoba, will be involved in integrating the completed wind park into the regional power grid. Minnesota Power’s Bison project was launched in 2010. The 82-MW Bison 1 wind farm consisting of 31 turbines was built over two years. This year, the Duluth-based electric utility erected an additional 70 towers. The accelerated timetable is largely due to the scheduled expiration of a production tax credit on wind generation at the end of 2012.
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