When is capacity not capacity?
- Apr 19, 2019 12:28 pm GMT
For decades capacity and capacity reserve have been used to determine if enough generation exists to meet demand. While some de-rating of plants is done for conditions, basically the size of the facility has dominated the capacity rating.
A recent blog indicating one-third of global capacity was renewables got me to thinking – is raw facility size useful anymore? If a natural gas fired generator is denied fuel, do they have available capacity? At night does PV count? Does solar plus storage with a 4-hour battery count at 4 AM? On a stormy day does a wind farm count?
I am not arguing that capacity should only be made up of facilities with fuel on site.
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