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Transmission Backbone: Offshore Cable to Set Stage for Wind

Google backs $5 billion infrastructure project aimed at spurring offshore wind development.

2 min read
Transmission Backbone: Offshore Cable to Set Stage for Wind

Transmission has always been the elephant in the room when it comes to renewable energy (with apologies to energy storage; let's call that the mildly smaller hippopotamus in the room). Because wind and sun tend to pick and choose their spots to blow strongest, shine brightest and longest, there is usually the need for additional infrastructure capable of bringing all that carbon-free electricity to the load centers.

Offshore wind is no different, and is even more complicated in terms of transmission because it's, you know, off shore. With the offshore wind industry poised to take off -- or at least finally get one foot off the ground -- there is now a proposed project that would theoretically ease the transmission issues of wind farms up and down the Atlantic coast.

A project to be known as the Atlantic Wind Connection will create a huge "transmission backbone," with undersea cables sited miles off the coast aimed at connecting new wind farms to the power grid without the need for piecemeal infrastructure. The project is run by Trans-Elect, with financial backing for its estimated $5 billion price tag from Google and others.

The Atlantic Wind Connection will run for 350 miles along the coasts of Virginia, Maryland, Delaware and New Jersey. A direct-current series of cables, it will be the first undersea cable in the US to actually pick up generated power along the way. And at 15 to 20 miles off the coast, if wind turbines are built around the backbone they will be barely visible from shore.

It has been a banner couple of weeks for the nascent (still) offshore wind industry. A recent National Renewable Energy Laboratory report indicated the massive potential of the wind flying past US shores -- four times that of all the existing electricity generation in the country -- and Secretary of the Interior Ken Salazar finally signed a 28-year lease allowing the 130 Cape Wind turbines to be built.

And at the signing of that lease, last week, Salazar hinted at this week's transmission announcement.

"By identifying high priority areas offshore for potential wind projects, we can explore the development of a transmission backbone in the Atlantic Ocean to serve those areas," he said. "Rather than develop transmission infrastructure plans on a piecemeal basis, we should – in close coordination with the private sector, states, and tribes – lay out a smart transmission system, up front."

(Image via Kim Hansen/Wikimedia Commons)

The Conversation (0)
This photograph shows a car with the words “We Drive Solar” on the door, connected to a charging station. A windmill can be seen in the background.

The Dutch city of Utrecht is embracing vehicle-to-grid technology, an example of which is shown here—an EV connected to a bidirectional charger. The historic Rijn en Zon windmill provides a fitting background for this scene.

We Drive Solar

Hundreds of charging stations for electric vehicles dot Utrecht’s urban landscape in the Netherlands like little electric mushrooms. Unlike those you may have grown accustomed to seeing, many of these stations don’t just charge electric cars—they can also send power from vehicle batteries to the local utility grid for use by homes and businesses.

Debates over the feasibility and value of such vehicle-to-grid technology go back decades. Those arguments are not yet settled. But big automakers like Volkswagen, Nissan, and Hyundai have moved to produce the kinds of cars that can use such bidirectional chargers—alongside similar vehicle-to-home technology, whereby your car can power your house, say, during a blackout, as promoted by Ford with its new F-150 Lightning. Given the rapid uptake of electric vehicles, many people are thinking hard about how to make the best use of all that rolling battery power.

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