4 ms·
They already have a meaningful impact today in the eastern US. In the PJM RTO, batteries (and fly wheels) perform frequency regulation (discussed elsewhere in t
by ghouse 9y ago
They already have a meaningful impact today in the eastern US. In the PJM RTO, batteries (and fly wheels) perform frequency regulation (discussed elsewhere in these comments).
- dragontamer 9y agoFrequency regulation is measured in minutes of storage though, not hours. LiIon / Flywheels are great to store minutes of energy cheaply. In effect, LiIon / Flywheels are hundreds-of-MW-hrs size at best. But unfortunately, the sun disappears for hours. A bigger solution is needed. Pumped hydro works for sure, but even at GW-hr scale (and yes, there are pumped-hydro plants at GW-hr size), its not going to be enough.