The wind farm would be based near Patna, Carsphairn, Dalmellington and New Cumnock.
Vattenfall said the project would bring “lasting economic benefit to the local community”, if approved.
Vattenfall’s UK Onshore Wind Development Director, Piers Guy, said: “Developments like this not only make a substantial contribution to the environment, they also have a significant positive impact on both the local and national economy.
“At the peak of construction activity, if the proposal is approved, 79 people will be working on site.
“It is our intention to maximize the potential of local people working on South Kyle Wind Farm.”
He added: “It will cost more than