True, it is more complex than it might seem at first glance. One of my EE classes had us go out to a power plant to tour it and they talked about some of the co

True, it is more complex than it might seem at first glance. One of my EE classes had us go out to a power plant to tour it and they talked about some of the complexity (because grid wide you get larger swings). They used to count on something like 80% of the households turning on the oven at 5PM while dinner was being prepared. They had actuarial staff that really dug into these numbers because some conditions would require starting up a 'peaker' plant and that took 3 - 4 hours to bring online from dead stop, about 1.5 hours from a "warm" start.