.. to the same grid. If you're lucky they're to different substations.

The number of people who had "independent" fiber connections which were routed through the same channel and destroyed by the same backhoe is so high it's a meme among sysadmins.

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cowlevel a day ago | parent [-]

The problem with trying to have two grids is that if anyone ever connects them together, now they're one grid with a weak link in it.

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pjc50 a day ago | parent [-]

See Japan (2) and the US (3).

DC links are now feasible for these situations, and don't have certain failure properties of AC grids (synchronization/frequency/phase).

	▲	cowlevel a day ago \| parent \| next [-]
		Now they're one grid with a controllable weak link. They might solve the all-or-nothing interconnection problem of AC grids, but they can still cascade failures - and they will, if one goes down and everyone switches to the other.
	▲	formerly_proven 17 hours ago \| parent \| prev [-]
		The two Japanese systems have 130+ GW of generating capacity each and the links between them have a total capacity of about 2 GW (<1%).