Simulation and dynamic control of a hybrid system for controlling the voltage and frequency of an island network

In this paper, Dynamic effect of a hybrid system consisting of fuel cell and battery in controlling voltage and frequency of an island network has been investigated. In this hybrid system, Using a suitable control system, battery has been used as a momentarily active power generation source and fuel cell as a delayed power generation source with a suitable time constant. Since fuel cells have a relatively high time constant for active power generation due to the nature of their performance, using this method, the fuel cell will have the sufficient time in the active power generation process; and this increases lifetime of fuel cell besides keeping DC terminal voltage of fuel cell constant about the nominal voltage.