At a wholesale there is flexible pricing. The grid has to do that sort of scheduling because if more power is put into the network then is consumed then systems

At a wholesale there is flexible pricing. The grid has to do that sort of scheduling because if more power is put into the network then is consumed then systems get damaged. This is also why the turbine based systems that coal and hydro systems are so important to the stability of the grid. The physical momentum of the spinning metal stores considerable energy and can smooth over short lived inbalences in power consumption.