Pem fuel cell energy grid integration to electrical power system

This paper focuses on the control of grid-connected fuel cell, the energy provided by the fuel cell is sent to the single-phased utility grid by means of a two-stage conversion system, composed of a DC-DC boost converter and a DC-AC inverter. The whole system is controlled through a two-level structure: the upper layer establishes the global scope, i.e., the desired operating regime, which is effectively implemented by the low control layer, i.e., by low-level controlling the two power electronics converters. Thus, the operating regime of the fuel cell is imposed by controlling the DC-DC converter, whereas the inverter is in charge with ensuring the power transfer to the grid. To simulate AC grid connected fuel cell system using MATLAB/ Simulink numerical simulations are presented and discussed in order to prove the effectiveness of the approach.