American Transmission Co.

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Generation at Two Creeks Solar Park now flowing on ATC’s system

ATC has recently completed a $1.3 million project to connect 150 megawatts of solar energy to our transmission system.

Two Creeks Solar Park the first solar utility-scale, renewable generation facility within ATC’s footprint. The completed facility is jointly owned by Wisconsin Public Service (WPS) and Madison Gas and Electric (MGE). Energy produced at the site will serve customers of both companies, with WPS owning 100 MW and MGE 50 MW of the capacity. The project was developed by NextEra Energy Resources, LLC of Juno Beach, Fla.

The 800-acre solar field features 500,000 solar panels and is located in the town of Two Creeks and city of Two Rivers, Wis. NextEra contracted with M.J. Electric to build a 6-mile, 138,000-volt generator lead line north of the solar farm to connect the solar collector station with ATC’s system at the Kewaunee Substation – which is owned by Dominion Energy.

“This generation to transmission interconnection is the first of its kind on our system,” said Christine Rawson, ATC senior project manager. “We purchased switches and breakers in an unused substation bay at the Kewaunee Substation from Dominion and added new controls and relaying to connect the generator lead line to our system.”

The Public Service Commission of Wisconsin approved the Generator Affiliated Interest Agreement for this project in December 2019, ATC’s construction was completed in July 2020, and the generator lead line was successfully tested and synchronized onto ATC’s system in September 2020.