AC and DC microgrid with distributed energy resources

Renewable power generation and the prospect of large-scale energy storage are fundamentally changing the traditional power grid. Arising challenges occur in terms of energy management, reliability, system control, etc. Microgrid, as an active subsystem of modern power grid, has revealed its promising potential in dealing with intermittent clean power generation and emerging energy storage, partially brought by electrical vehicle batteries. In this chapter, the concept of microgrid is introduced. The main focus is placed on the basic issues of control, operation, stability, and protection of DC microgrids