Oscillations. If you have a system with many inputs, and it is oscillating in 'quality' or spec level, then you must expect a big hit of 3 times the average bump. This is a 'Law of the Universe' determined by the Plinko game.
Drop in the coin and watch it fall. Plot the end position of the disk and see oscillations, and then wait for the winner, which comes sooner than you think.
You don't want instability in a grid, or quality in a factory. That is why the good companies keep general oscillations down to 10% of a 'bad thing'. The worst thing to do is 'oversteer' on the excursions, like the climate change wackos. However, it happens all the time.
In Spain's case, the grid went unstable due to a large input of solwind. A large grid is an amazing balance of high-speed turbines and electrical wave guides. Muck with it, at your peril. This is a physics thing, and, like all physics, grossly under-examined.
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