While planning for the worst conditions is prudent, what often gets overlooked is the fact that the system can still be planned and designed around when the sun is shining or the wind is blowing. In fact, when you have renewables running all out, that's when pool prices can be at their lowest. I get that if Renewables are overbuilt there's concerns about overloading the grid, but other jurisdictions just shut in facilities if that's the case/compensate the generator in those case. That'll require a re-work of the system as well, but it's a complex problem requiring complex solutions.
But really, having more renewables on the grid to displace non-renewables in those high supply times isn't a bad thing - it's like mixing in a water on a night of heavy drinking - it's a sensible thing to do.
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