A Single-Phase Grid-Connected Fuel Cell System Based on a
Boost-Inverter
Abstract—In this
paper, the boost-inverter topology is used as a building block for a
single-phase grid-connected fuel cell (FC) system offering low cost and
compactness. In addition, the proposed system incorporates battery-based energy
storage and a dc–dc bidirectional converter to support the slow dynamics of the
FC. The single-phase boost inverter is voltage-mode controlled and the dc–dc
bidirectional converter is current-mode controlled. The low-frequency current
ripple is supplied by the battery whichminimizes the effects of such ripple
being drawn directly from the FC itself.Moreover, this system can operate
either in a grid-connected or stand-alone mode. In the grid-connected mode, the
boost inverter is able to control the active (P) and reactive (Q) powers using
an algorithm based on a second-order generalized integrator which provides a
fast signal conditioning for single-phase systems. Design guidelines,
simulation, and experimental results taken from a laboratory prototype are
presented to confirm the performance of the proposed system.
(Index Terms—Boost inverter, fuel cell,
grid-connected inverter, power conditioning system (PCS), PQ control.)
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