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Why California’s Solar Power Could Soon Be Curtailed.

I could see technology playing a role in this -- there is no reason why air conditioners, refrigerators, and electrical heating systems couldn't be rigged to up ramp up or down when grid frequency either sags or accelerates. Nobody is going to notice if air conditioning drops or rises 2-3 degrees momentarily.

So when there is excess power in the grid, rather then trying to redirect it, appliances could take advantage of it to do useful work on the cheap. Power plants do this already, so why not consumer appliances? I guess there would concerns that if millions of appliances ramped up when there was a slight increase frequency, their would be overcompensation.