There are several types of fuel cells being developed for a variety of applications. The solid-oxide fuel cell is in an entirely solid state with no liquid components. This paper discusses the potential of a solid-oxide fuel cell fed by natural gas to serve locally as voltage support for the ac bus. A grid-connected fuel-cell plant consists of the fuel cell and the voltage-source inverter. The flux-vector control is used very effectively for the control of this inverter. Simulation results are presented to evaluate the performance of this fuel cell plant to alleviate voltage problems present on the ac grid.