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[ First Ocean Energy Delivered to the U.S. Grid ]

ORPC’s TidGen power system, shown in this rendering, has begun delivering power to the grid from Cobscook Bay, Maine. Credit: ORPC

The first grid-connected tidal power project in the United States project is now delivering electricity to the utility grid from an underwater power system in Cobscook Bay, Maine. Bangor Hydro Electric Company verified on September 13 that electricity generated by an underwater turbine generator is flowing to their power grid from Ocean Renewable Power Company’s (ORPC) Cobscook Bay Tidal Energy Project. The project is funded by a $10 million investment from the Energy Department, as well as the Maine Technology Institute and private investors.

The device, called a TidGen, is designed to operate in shallow tidal or deep river sites at depths of 50 to 100 feet , and has a peak output of 180 kilowatts. That amount is enough electricity to power 25 to 30 homes annually. In April, the Maine Public Utilities Commission approved a 20-year power purchase agreement for ORPC’s Maine Tidal Energy Project (which includes the Cobscook Bay Project) with three utilities: Central Maine Power, Bangor Hydro Electric, and Maine Public Service. Two additional TidGen devices will be installed at ORPC’s Cobscook Bay Project site in the fall of 2013, and together, the three-device power system will generate enough energy to power 75 to 100 homes. The devices connect directly to an onshore substation through a single underwater transmission line. See the ORPC press release Web page, the May 9 edition of EERE Network News, and the Energy Department Water Power Program website.

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