Development of AC Microgrid Test Bench with Hydrogen Fuel Cell and Renewable Sources

This paper focuses on the implementation of local microgrid control applied to an isolated AC microgrid with PEM-FC system acting as main source and renewable sources used as power exporting sources. The AC microgrid works as an autonomous system, as in remote communities' applications, using D-Droop and I-Droop schemes which allow the operation of the multisource system without communication link among the power and voltage controllers. The local control system has been implemented in Field Programmable Gate Array (FPGA) and evaluated by simulation and by experiments with a PEMFC & renewable sources AC microgrid. The development of power electronics converters and the controllers which are based on FPGA technology is also presented. The simulation and experimental results confirm that the proposed local control can be applied in a real AC microgrid with good transient and steady state response to supply the AC load correctly.