Control strategy of distributed generators in microgrid

Microgrid is a newly proposed organization of distributed generation system. It can operate in net connected mode and islanded mode, when the operation switches between the two types of mode, the variety power will emerge. If this happens, the level of the system voltage will be fluctuating in a wide range, and the system frequency will also be fluctuating in an unacceptable range. The load power supply will be influenced seriously. To minimize the influence on load power supply, in this paper we adopt two different types of control strategy: invariable power control and invariable voltage control. Appling them to the distributed generators in different operation mode, we established simulation models. The result proves that the control strategy is valid.