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A comment on The booming business of knitting together the world’s electricity grids. Parent comment

Re:The booming business of knitting together the world’s ele... by LargoLasskhyfv on Monday October 18, 2021 @07:25PM (#28913124)
Maybe because they can be implemented with only one pole/conductor for the underwater part. AFAIUI two poles go to the shore, where one pole ends in a metal-mesh underwater, using the salty sea as conductor until the remaining single cable reaches the other shore, where another underwater metal-mesh exists, and from that emerges the remaining piece of dual pole HVDC overland.

I know of at least one such solution between Germany and Sweden trough the Baltic Sea.

edit: This https://en.wikipedia.org/wiki/Baltic_Cable

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Re:The booming business of knitting together the world’s ele... by lazide on Monday October 18, 2021 @09:11PM (#28913820)
It’s even easier to do that on land by the way. You’d use large Earth grounds, which also don’t corrode as badly as grounds in saltwater. And running it on land (minus permitting, right of way, etc) is dramatically cheaper as the cable itself also doesn’t need to be as sturdy.

I found this neat paper on HVDC grounds and interconnects too [http://b-dig.iie.org.mx/BibDig2/P13-0399/files/PESGM2013-001...]

The point is that right of ways and permits are super hard on land, which is why most of these are run via the sea.

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Re:The booming business of knitting together the world’s ele... by LargoLasskhyfv on Monday October 18, 2021 @09:56PM (#28914045)
Skimmed the 5 pages and saved to Tsundoku-stack.
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