Ontario's energy system is on the verge of some rather large changes and upgrades. Some politicians have you believe we can switch to renewables very soon, others say we need to rely mostly on proven, cheap and dirty options like coal. But what are the technical challenges that need to be overcome with our particular grid, and is it feasible? Here are the people who can answer your questions. I came across this site, and it really helped me get a solid understanding of the system as a whole. It was created by the power workers of Ontario. They certainly know what they're talking about when it comes to energy. Check out the site and the videos, very informative.
http://abetterenergyplan.ca
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http://abetterenergyplan.ca/#/home/renewables-conservation/video-renewables