Hydro-Quebec is also doing at least one 1500km hvdc to the US and multiple 1000+km lines to the dams in the north.
https://en.m.wikipedia.org/wiki/Hydro-Qu%C3%A9bec%27s_electr...
https://github.com/pirate/quebec-power-grid-talk
It's one of the only multi-terminal HVDC lines in the world, most of the others are just point-to-point.
They also literally short out the power lines with DC to warm them up and melt the ice off during ice storms, pretty crazy stuff.