| Abstract |
The changeability in the power produced by utility-scale PV plants caused by shadows due to passingclouds can compromise grid stability. Traditionally, some kind of energy storage systems (ESS) isproposed as the solution to reduce power variations below the limits imposed by new grid codesregulations. However, recent short-term forecast sources open the door to control the variabilitywithout batteries, using only inverter limitation. This option entails some energy curtailment lossesthat has not been yet addressed. This paper quantifies these losses for the first time using a meaningfuldatabase of 5 s one year data for a 38.5 MW PV plant in a perfect forecast scenery. Finally, wecompare the economic cost of installing a lithium-ion battery vs. the inverter limitation solution. Theresults obtained indicate that battery-less strategies must not be neglected for ramp-rate control, sincethey can be more cost-effective using perfect forecast for any ramp value. |
