It is probable that wind isn't getting those highest rates. As it is in some cases the cause for high prices. When it is windy it is windy over substantial area and thus they produce lot. Meaning that there is lot of power to sell at market at any rate. Thus driving the price at the moment down.
We don't have enough wind for that to be an issue, the price is still set by the marginal cost of gas as we never produce enough wind to not need gas https://grid.iamkate.com/
If we had twice as much wind power this might start to be an issue.
