| 摘要 |
PURPOSE:To make it possible to operate a fuel cell stably by adding a proceeding control to a feedback control loop of an interelectrode voltage difference control valve depending on preset air and fuel flow values, as well as controlling the ratio of the gas amount consumed inside the cell to the feeding amounts of the air and the fuel within a specific range. CONSTITUTION:The cell furnishes a main controller 16 and the like to control in a package a D/A converting controller 11, flow controllers 4 and 5 between the electrodes, an interelectrode voltage difference controller 9, and the like, according to the operator instructions. In the power generation system of such a fuel cell, as well as the D/A converting controller 11, and the air and the fuel flow controllers 4 and 5 are controlled in a cross limit control to make the ratio of the gas amount consumed inside the cell to the air and fuel feeding amounts within a specific range, a proceeding control is added to the feedback control loop of an interelectrode voltage difference control valve 8 depending on the preset values of the air and the fuel flows. As a result, the voltage difference between the cell electrodes is controlled within a specific range, as well as the gas shortage of the fuel and the air is prevented against a sudden variation of the load instruction or the variation of the actual load, and the fuel cell is operated stably. |
