Micro-Grids and Distributed Power Generation

Even as our lives have become more dependent on reliable electric service, the legacy electric grid has become more troubled as weather and usage takes their toll.  On the other hand, we've increasingly come to understand how a centralized “smart grid” could potentially create problems as big as the one it solves.  A feasible alternative is a network of micro-grids that can operate as an integrated whole, as well as in autonomous self-contained segments.  Where does this technology stand?  What are the impediments and incentives to implementing it?&.....