I believe this is because wind turbines are brought online and taken offline according to demand. Nukes/gas stations can't have capacity adjusted very quickly,

I believe this is because wind turbines are brought online and taken offline according to demand. Nukes/gas stations can't have capacity adjusted very quickly, and take hours to get up to full production. Wind can be started/stopped quickly as demand rises and falls throughout the day "Demand response may also be used to increase demand during periods of high supply and/or low demand. Some types of generating plant must be run at close to full capacity (such as nuclear), while other types may produce at negligible marginal cost (such as wind and solar)."[0] [0] https://en.wikipedia.org/wiki/Demand_response https://en.wikipedia.org/wiki/Demand_response