American Transmission Co., along with co-sponsors Electric Transmission America, transmission joint venture between subsidiaries of American Electric Power and MidAmerican Energy Holdings Co.; Exelon Corp.; NorthWestern Energy; Xcel Energy; and MidAmerican Energy Co., a subsidiary of MidAmerican Energy Holdings Co., have released the first phase of a comprehensive study of the transmission needed in the Upper Midwest to ensure reliability and support renewable energy development for transport to population and electricity load centers.Phase I results of the "Strategic Midwest Area Transmission (SMART) Study" recommend three alternatives for further study based on a rigorous reliability assessment and stakeholder input. One alternative is primarily 765 kV extra-high-voltage transmission. Another scenario includes 765 kV combined with limited use of high-voltage direct current transmission lines, while the third constitutes a combination of both 345 kV and 765 kV transmission lines.
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