UHVDC is 2.6% loss per 800km so after 8000km you have 76.8% left. That's not too bad. Although I obviously don't know what distances you had in mind.

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lysace 21 hours ago | parent [-]

Bullshit.

What voltage is UHVDC at those numbers? Who is supplying the equipment? Where are the demo installations? What's the cost?

Again, the goal is economic very long distance transfer of electric power. Not a Chinese university research project.

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cinntaile 20 hours ago | parent [-]

I don't get why you're feeling so attacked? I'm just citing the numbers. UHVDC is defined as >=800kV

> "HVDC transmission has typically 30-50% less transmission loss than comparable alternating current overhead lines. (For comparison: given 2500 MW transmitted power on 800 km of overhead line, the loss with a conventional 400-kv AC line is 9.4%; with HVDC transmission at 500 kV, it is only 6%, and at 800 kV it is just 2.6%.)" [1]

There are quite a few of UHVDC lines in China, not much in the rest of the world. [0] I don't know what they cost, but maybe you can estimate it based on what they decided to invest over a 10y period.

[0] https://en.wikipedia.org/wiki/Ultra-high-voltage_electricity...

[1] https://web.archive.org/web/20180730045905/https://www.sieme...

	▲	lysace 20 hours ago \| parent [-]
		[flagged]