I examine with curiosity the other day about programs in northern Ireland for a fairly unique way of electricity storage, and the first of it is kind within the Uk. The program would be to use affordable electricity to pump air into underground caverns. Then, when the electrical energy price increases, release this compress air by way of generators to generate electric power. In distinct this will be beneficial as it will offer a very good way of matching up electricity with electrical power demand, which of program is a single of the most significant troubles with most forms of renewable electric power era. This is not entirely unproven technologies, as there are also schemes in Germany and The united states, and so presumably there is a lot less risk.
I also see another prospective financial advantage of such power storage schemes – as the energy is typically stored at peak output this implies there will be significantly less need for costly grid functions. For case in point, if a wind farm would normally generate a peak output of 30MW, and do so for a 3rd of the time and for the other two thirds of the time below a standard scheme in which all eletricity is pumped straight into the grid, the nearby grid will require to be ready to cope with 30MW of added era. Nevertheless, if an power storage scheme is employed, the output could be changed to 10MW all of the time, which means much less has to be spent on grid re-inforcement and there will be better predictability in creation, that means less require for back-up generators.
The only issue will be whether or not these storage schemes will qualify for ROCs, and if so at what charge.