PI controller based frequency regulator for distributed generation

In this paper a microgrid consisting of wind turbine generators, aqua electrolyzer, fuel cell and diesel generator is analyzed with an assumption that the power generated from the wind turbine generator remains constant during a load disturbance. On the other hand power produced from all the other distributed generation (DG) sources are regulated by simple PI controllers. As the balance between the load and generation changes, the power system frequency deviates. In order to reduce these frequency deviations, the PI controllers, used to regulate the power flow from DGs, are tuned through trial and error method.