Psted by ADMIN on behalf of our Australian friend.
In relation to the PNAS paper recently distributed, much has been made of a few theoretical studies on the geographic dispersal of windfarms and their alleged ability to back one another up. In Australia we have over 30 windfarms spread over many hundreds of kilometres. (I had the signal honour of carrying out the technical feasibility study for our very first.)
These charts show the aggregate data from 18 of the largest windfarms spread from Adelaide, to Melbourne, to Hobart to Canberra. The first chart shows the actual aggregate output from yesterday, the second the same aggregate output normalised to 100MW to remove any bias due to size.
Yesterday was not very special weatherwise but the strong correlation between outputs can be readily seen which results in a minimum generation less than 16% of maximum generation for the day. The normalised situation is slightly worse at less than 15% of normalised maximum. The contention that there is always wind blowing somewhere is shown to be