Not dynamic, but an EV rate so I get the overnight rate and a daytime rate and I also hand control of the car charger to my provider. It will usually charge overnight but if energy is cheap on the network at other times it will trigger the charge and my entire consumption during that time will be at the night rate.

There are also incentives to save energy at particular times, cut your usage below normal levels at high demand times and get "free" energy at other times in return. It helps the provider balance the grid with their wholesale input deals.