That US blackout was completely isolated to the Northeast Power Coordinating Council (NPCC), all other regional grids where unaffected. https://en.wikipedia.org/wiki/North_American_power_transmiss.... “The regions are not usually directly connected or synchronized to each other, but there are some HVDC interconnections.”
It’s just a question of cost. Regional grids could have more resiliency internally, but large blackouts are rare enough it’s not considered worth it.
That US blackout was completely isolated to the Northeast Power Coordinating Council (NPCC), all other regional grids where unaffected. https://en.wikipedia.org/wiki/North_American_power_transmiss.... “The regions are not usually directly connected or synchronized to each other, but there are some HVDC interconnections.”
It’s just a question of cost. Regional grids could have more resiliency internally, but large blackouts are rare enough it’s not considered worth it.