A microgrid is a regionally limited energy system of distributed energy resources, consumers and optionally storage. A microgrid optimizes the benefits of distributed generation including power quality and reliability, sustainability and economic benefits. The most important feature of a microgrid is its ability to separate and "island" itself from a utility's distribution system during power system disturbances and blackouts.
In every country of the world, today's customers expect a reliable and secure power supply. However, an interconnected power system with long transmission and distribution lines will always be prone to disturbances. Microgrids can provide reliability to customers in the case of such a disturbance.