Subsea Cables « JoNova

Failing underwater cables “pose global threat to offshore wind”

They’re not much use without a lot of cabling. | Image by Norbert Pietsch from Pixabay

By Jo Nova

Thanks to Oldbrew at Tallblokes Talkshop

Who knew high voltage cables running for kilometers in a deep electrolytic moving body of water would be expensive?

The 245kV Wolfe Island Cable | Photo by Z22

Despite offshore windfarms dealing in a kind of mechanical hell of high speed salt water spray, big waves and volatile wind conditions, surprisingly 85% of the insurance claims are because the underwater cables are failing.* If the subsea cables can’t be insured, it’s another unexpected cost threatening the economics of offshore wind.

The underwater cables needed for offshore wind are apparently so costly to repair, and the losses from lack of generation so steep, they are in danger of becoming uninsurable.

Subsea cable failures pose global threat to offshore wind

Energy News Live

The race to harness offshore wind energy has hit a significant roadblock, with the reliability of subsea cables emerging as a critical concern.

Global Underwater Hub (GUH) has raised alarm bells about the escalating issue of subsea cable failures.

As underwater gas pipes explode, ponder that a third of UK gas comes from an underwater pipe

The UK is pretty much one wayward submarine away from losing a third of its gas supply. Even if the pipe stays intact, it’s already a national security crisis. It’s a vulnerability that will affect the UK’s ability to bargain with confidence or battle right now.

German authorities are saying that the pipelines will be rendered unusable if salt-water has entered the pipes. Corrosion will make them unrepairable.

And lets not forget there are a lot of other underwater cables which nations with unreliable energy are now utterly dependent on. Here in Australia, an interconnector trip led to the Statewide blackout in South Australia, and the Bass Strait cable break (not even an act of war) left Tasmania on the verge of one for five months. In both cases they lost hundreds of millions of dollars, but it would be so much worse if that happened today during a global energy crisis when there’s is already a bun fight for spare parts and spare fossil fuels.

The UK imports 11% of its power from Europe, half from France, and two years ago President Macron was threatening to block an interconnector in a battle over post-Brexit fisheries. […]