Re:Continued G4 (Severe) Geomagnetic Storming Observed
by detaro on Friday September 08, 2017 @01:21PM
(#15202159)
For undersea connections, the water around it means the line has a lot higher capacitance. An AC link has to load/unload that capacity all the time and looses energy to it, a DC link doesn't.
Similar effects happen with normal power lines as well, so it also has benefits on long-distance connections on land. Since you need conversion equipment on all ends, it's typically used only for point-to-point links, not for lines with branches in between - an example might be connection hydro plants in the wilderness somewhere to more populated areas.
For links between non-synchronized networks, since conversion is needed anyways to match between them.
Similar effects happen with normal power lines as well, so it also has benefits on long-distance connections on land. Since you need conversion equipment on all ends, it's typically used only for point-to-point links, not for lines with branches in between - an example might be connection hydro plants in the wilderness somewhere to more populated areas.
For links between non-synchronized networks, since conversion is needed anyways to match between them.
Wikipedia: https://en.wikipedia.org/wiki/High-voltage_direct_current and https://en.wikipedia.org/wiki/List_of_HVDC_projects