A novel power electronic interface for the grid-connected fuel cell power generation system is proposed in this paper. This power electronic interface is composed of a DC-DC power converter and a DC-AC inverter. A voltage doubler based topology is adopted to configure the DC-DC power converter to perform high step-up gain for boosting the output voltage of the fuel cell to a higher voltage. Moreover, the input current ripple of the fuel cell is suppressed by controlling the DC-DC power converter. The DC-AC inverter is configured by a dual buck power converter and a full-bridge power converter to generate a five-level AC output voltage. The DC-AC inverter can perform the functions of DC-AC power conversion and active power filtration. A 1.2 kW hardware prototype is developed to verify the performance of the proposed power electronic interface for the grid-connected fuel cell power generation system. The experimental results show that the proposed power electronic interface for the grid-connected fuel cell power generation system has the expected performance. (C) 2013 Elsevier Ltd. All rights reserved.