In Ontario, Alberta and British Columbia, Canada and Washington, USA at least, I am certain that company that builds a wind farm gets a contract where some gove

In Ontario, Alberta and British Columbia, Canada and Washington, USA at least, I am certain that company that builds a wind farm gets a contract where some government-backed entity guarantees they will buy all of the power the wind farm will produce at a pre-determined rate(s). Otherwise nobody would put up the money to build the wind farm. So while they could feather the blades they have no incentive to. In Ontario if they were forced to not generate they would still be paid for the power they weren't allowed to produce ("being constrained off").