COMBINED HEAT AND POWER COGENERATION SYSTEM FOR A FUEL CELL, AND CONTROL METHOD THEREOF

摘要

A combined heat and power cogeneration system for a fuel cell according to the present invention comprises: a fuel cell that produces direct current power using fuel gas containing hydrogen and air containing oxygen; a power converter which converts the direct current power produced by the fuel cell into alternating current power; a power divider which selects commercial power from an electric power system and power produced by the fuel cell and divides the selected power into loads; a waste heat recovery unit for recovering heat generated by the fuel cell; and a fuel cell controller which controls the fuel cell, the power converter, the power divider, and the waste heat recovery unit, and controls the commercial power such that the price of the commercial power and the price of the produced power coincide with each other at a preset level.