Is there already extensive precedence of undersea, long distance power distribution? I could imagine the losses would be outrageous at that distance.
this post was submitted on 31 Oct 2024
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High voltage DC lines lose about 3% per 1000km, so this project with 4300km of lines could theoretically be set up to lose 12% in losses. There's also some experimentation with ultra high voltages that would be more efficient, but probably more complex to engineer.
How about reliability?
Example, SwePol, from the Wikipedia:
SwePol is a 254.05-kilometre (157.86 mi)-long monopolar high-voltage direct current (HVDC) submarine cable between the Stärnö peninsula near Karlshamn, Sweden, and Bruskowo Wielkie, near Słupsk, Poland.[1]
The annual maintenance of SwePol lasted 6 days in September. Additionally, SwePol had 10 other planned maintenance outages during 2021. There were 5 minor disturbance outages, of which one lasted more than 8 hours. SwePol was offline due to disturbance outages for 49 hours in total in 2021. [10]
Maybe take a look at the North Sea Link with 730 km length, 1.4 GW power rating and estimated costs of €2 billion, becoming operational in 2021.
The NSL has thus roughly
- one-sixth the length (730 km / 4300 km),
- half-ish the power rating (1.4 GW / 3 GW) and
- one-ninth the estimated costs (€2 Bn (or A$3.31 Bn) / A$30 Bn (or €18.12 Bn))
of the Australia-Asia Power Link.
Seems expensive to build above tried specifications.
12x GW*km at 9x the price is better than 1:1 performance/cost scaling. Obviously labor price and other factors make it not apples to apples, but that doesn't seem like an awful scaling price premium
The most reliable system (against natural causes, political, and financial strife, as well as future-proofing) would be local microgeneration.
This sounds like a huge boondoggle.
This is one of the cases where I’d just argue for nuclear energy. Too many industries and too high population density makes it very hard to use solar energy properly, they don’t have a lot of land either so land redistribution probably wouldn’t work as an alternative measure.
Do the economics of nuclear make sense though? A quick search showed around $5k/kW capacity. That's $5 billion per GW. Then there's permit and build times on top of that.
Surely renewables + distributed storage is going to become key?