This has been brought up since the first wind/solar/tidal energy plants were being brought in production. I don't have any links at hand but this has been studied; watch the comments under stories like this one, they come up often.

Basically as far as I understand the general consensus, even when evaluating worst case scenarios, is that the amount of power that is taken away is negligible, even compared to the total power consumption on earth (i.e. even if all power on earth would come from e.g. wind power, that would still be only a minuscule part of the total power that is in winds blowing all day, or sunshine that is emitted by the sun each day.)