I know the title reads weird... That was also my first reaction to last week's task: prepare a presentation on the "obligation to add instruments to control wind parks remotely" (this is in the new energy law in Germany). What came to my mind first was that:
Why smart grids? Basically the challenge is to balance demand and production in order to keep the network frequency (50Hz) stable and the prices positive (on the electricity stock market). It becomes more difficult to do with renewables since their production is difficult to predict. Therefore, you need to use sensors to control their production.
So feel free do look at my presentation (in my creative German, but I guess understandable with the pictures) and the two short movies (one in English, the other in German), to get a glimpse of the future, and keep you motivated! 100% renewable is possible!