Block Island Offshore Wind Farm powers first American homes

Editor’s note: The first offshore wind farm in the U.S. is now fully online and powering an island community off the coast of Rhode Island with wind energy, thanks in large part to GE’s Haliade 150-6MW offshore turbines. In the latest GE Reports, writer Tomas Kellner shares more…

Block Island Wind Farm consists of five GE Haliade 150-6MW offshore turbines with enough capacity to generate 30 MW of renewable electricity from the breezes whipping over the sea’s surface. (Image: GE Reports)

The small island sits off the coast of Rhode Island between the northeastern tip of New York’s Long Island and Martha’s Vineyard, Massachusetts. There, like the archetypal New Englander, it cuts a hardy and stout profile, with chin out, to face the battering North Atlantic Ocean, the bruising wind and the weather it brings.

But a new era has dawned, and the relationship between the wind and Block Island will never be the same. In the wee hours of May 1, the diesel generators operated by the Block Island Power Company, the island’s electricity provider, fell silent.

Workers shut down the units at 5:30 a.m. and switched some 2,000 customers over to a new source.

When lights came back on moments later, they were powered by electrons streaming from Deepwater Wind’s Block Island Wind Farm. The switch made Block Island the United States’ first community to receive electricity from an offshore wind project. It should allow the power operator to save  almost a million gallons of diesel fuel every year.

The wind farm consists of five GE Haliade 150-6MW offshore turbines with enough capacity to generate 30 MW of renewable electricity from the breezes whipping over the sea’s surface here. It sits in the ocean three miles south of Block Island, which now receives its power via undersea cables connecting the wind farm to the island and the Sea2Shore cable linking the wind farm to the mainland grid in Narragansett, Rhode Island.

The islanders are cheering more than just the wind farm’s environmental benefits. Their power’s price volatility also will dramatically decrease. Now they pay a fixed-transmission charge of 12.44 cents per kilowatt-hour, which is half the amount of the average fuel-cost adjustment they’d been paying since 2012.

“The construction of the Block Island offshore wind farm and the undersea cables represent a monumental engineering effort,” Ken Lacoste, first warden of the Town of New Shoreham (Block Island), told The Block Island Times. “The nature of our energy supply has taken a giant step forward and in doing so sets the pace for other offshore wind development.”

The wind farm as already proved it can withstand Mother Nature’s punch better than the many ships whose remnants litter the seafloor around the island. Earlier this year, the turbines kept churning through winter storm Stella, producing power in wind speeds up to 55 mph. They automatically shut down above that speed and stoically faced the nearly hurricane-force winds reaching 70 mph during the storm’s apex.

Says Deepwater Wind CEO Jeffrey Grybowski: “We’re confident that the example Block Island has set will inspire communities up and down the Eastern Seaboard to chart their own path toward a renewable future.”

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