Considerations on islanded microgrid frequency control capability within different generation configurations

Self sustainable microgrids are becoming a reality in power systems, given the increasingly penetration of dispatchable Distributed Generation (DG) and Renewable Power Generation (RPG). Thus, a distribution system becomes a microgrid, and a microgrid may evolve into smart grid, if control and communications are considered. This paper addresses islanded microgrid's frequency control capability within different generation configurations and proposes a frequency control method based on microgrid nodes demand. An unbalanced distribution power flow considering droop method is employed and several operating conditions are performed. The proposed methodology is validated by modified IEEE-34 bus system considering dispatchable, non-dispathacle and renewable source generators.