Distributed generation as an important measure of resolving large area power blackout in electric grids;

This paper puts forward the concepts of distributed generation and distributed electric power system, points out its magnificent advantages against the traditional central electric power system, studies deeply its influence and new challenges which occur.

In practical use, both the modes of divergent thinking and reversal thinking must follow certain principles: divergent thinking, while stressing flexibility in thinking, should make clear its directivity; and reversal thinking, while streesing its criticism in thinking, should pay attention to its constructivity.