"A power company in Shetland has claimed a breakthrough in the race to develop viable offshore tidal stations after successfully feeding electricity to local homes.
Nova Innovation said it had deployed the world’s first fully operational array of tidal power turbines in the Bluemull Sound between the islands of Unst and Yell in the north of Shetland, where the North Sea meets the Atlantic.
It switched on the second of five 100kW turbines due to be installed in the sound this month, sending electricity on a commercial basis into Shetland’s local grid.
Existing tidal schemes use single power plants or installations rather than a chain of separate turbines. A French company, OpenHydro, says it too is very close to linking two tidal machines, off Brittany, to build a more powerful 1MW array."