3 ms·
You're correct, but in the industry we really just talk in terms of Power at the transmission grid level and usually in millions of watts or MW. So if a coal pl
by throwaway7645 9y ago
You're correct, but in the industry we really just talk in terms of Power at the transmission grid level and usually in millions of watts or MW. So if a coal plant is currently generating 2000 MW and you have a battery that can only consume 5 MW or 0.25%, then that isn't very much storage. Put another way, let's say the load in your region is 60 GW and you have 200 MW of energy storage. That is only a tiny fraction of storage relative to what the demand is.
- dmurray 9y agoSo the main constraint on the battery is throughput, not storage capacity?
- throwaway7645 9y agoNope, the main issue is indeed the fact that it can't store a whole lot of energy (also important that they can't maintain a high output for too long), but we still talk in MW as that is what we're primarily concerned with (MW flow on a line going over the line's rating...not having enough generation (MW) to meet load (MW)...etc). Saying a battery can't store enough MW isn't scientifically accurate, but it is the slang of the industry if you will. If you worked in the water industry they're probably very concerned with water flow rates. In high voltage transmission we're concerned with the flow of power (MW (real power) & MVAR (reactive power))
- srtjstjsj 9y agoYou have the read in the implied math about the length of the demand cycle and how long it takes to fill capacity at the quoted throughput. for example, 12MWH battery can handle 12MW of peak throughput for 12 hours, and then discharge over 12 hours of trough throughput. "12MWH" and "12 hours" are ouputs to the battery formula, "12MW" is the output.