TacTurtle t1_ixe9unn wrote
Reply to comment by danielv123 in HVDC macrogrid would reduce climate pollutants and electricity costs while transmitting low-cost renewable power by manual_tranny
Yeah at that point you end up running multiple cables per phase so the linemen can still actually physically bend and move the cable - at least on the distribution side.
Who even makes HV underground cable rated for DC? Okonite’s catalog only has underground rated to like 35kV, versus 69kV for above ground.
danielv123 t1_ixel5tr wrote
Prysmian group makes up to 1100kv AC underground apparently. Nexans has delivered 500kv underground systems in the past, don't know how high they go. For these projects the cables are always custom made though, so there isn't really a catalog to pick from.
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