Looking at Ontario's numbers, I see no way in getting 11,000MW of renewal power to replace nuclear connected to the grid, regardless of how many interconnects are set up to other jurisdictions (especially the population is concentrated in the south, and so there's be a high concentration of connections).
Ontario has quite a few turbine farms itself, spread over a reasonable wide area, and even then variability is high:
Ontario has quite a few turbine farms itself, spread over a reasonable wide area, and even then variability is high:
* http://www.ieso.ca/localContent/map/default.htm
And given that weather systems travel west-to-east, any neighbours are going to have lulls at roughly the same time as Ontario.
Perhaps in other jurisdictions things can work out, but I see it as a non-starter here.