One of the world’s first offshore tidal energy arrays was connected to Scotland’s grid this August. On its heels is the grid connection of a second array that is owned by a different company.

Nova Innovation, a Scottish tidal energy company founded in 2010, on August 28 grid-connected the second of three 100-kW Nova M100 turbines that are planned for deployment in Bluemull Sound. The sound sits between the islands of Unst and Yell in the north of Shetland, where the North Sea meets the Atlantic.

The M100 tidal turbine (Figure 2) developed by the Shetland Tidal Array—a joint enterprise between Nova Innovation and Belgian renewables firm ELSA—builds on the successful design, manufacture, and deployment of a community-funded 30-kW device. “Although the device is three times more powerful than the Nova 30 it is only twice the cost,” Nova Innovation says on its website.

tidal energy

2. Time and tide. Nova Innovation’s first M100 turbine was grid-connected in March 2016 in Scotland’s Bluemull Sound. “The device has been generating up to full power and across all tidal conditions,” the company said. Nova Innovation deployed a second turbine this August, making the project one of the first grid-connected tidal arrays in the world. Courtesy: Nova Innovation

In the race to grid connect the world’s first fully operational array of tidal turbines, Nova Innovation surged ahead of OpenHydro, a company owned by French industrial group DCNS. That company deployed a second turbine at French utility EDF’s Paimpol-Bréhat tidal project in North Brittany in May (Figure 3), indicating that the array would be connected to a submarine converter developed by General Electric to export 1 MW to the French grid this past summer (see “First Turbine Deployed at French Tidal Power Farm” in the April 2016 issue).

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3. Going with the flow. DCNS subsidiary OpenHydro successfully deployed its second turbine at EDF’s Paimpol-Bréhat tidal array, saying it will complete grid-connection this summer. Courtesy: DCNS

OpenHydro is now looking ahead at setting up a 14-MW array for EDF Energies Nouvelles’ Normandie Hydro project by 2018, announcing in May that it will build a turbine facility in Cherbourg to act as an industrial hub for that project. The facility has yet to be finalized by the French government, however.

—Sonal Patel, associate editor