How hard is it to turn the market completely dynamic in terms of minute by minute power prices? Even negative power prices so if people feed into the grid during bad times they literally need to pay? Would be an incentive to make a "smart" network.
That isn't even strictly necessary. If the grid is set-up correctly you can send network signals to distributed generators (i.e. people who have solar installed at home) to stop exporting, in a similar fashion to how your hot water can be turned off remotely during periods of high network load.