this post was submitted on 20 Dec 2023
0 points (NaN% liked)
Technology
59605 readers
3366 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Why do you think so? HVDC cables are not unusual nowadays, and in fact excel both in economic and technical terms over long distance.
https://www.electricaldeck.com/2021/08/comparison-between-hvdc-and-hvac-transmission-system.html
This cable length is 765km, but in the Canadian province of Manitoba we have a 900 km transmission line built 50 years ago and still running strong for the most part.
Huh. I've just always heard that AC is the better way for long distances. TIL
AC is typically used for power grids because it's very easy to change voltage with a transformer. You can have 100-200V in households, and use a cheap transformer to step up the voltage to 100+kV to reduce resistive losses for long distances.
AC works well, but there are technically some downsides with AC, like the skin effect and parasitic capacitance. With modern technology, it's pretty easy to step up/down DC voltage, and by using it for the biggest, longest power lines, you see some nice power savings for the effort. It's called "HVDC".