FUEL CELL SYSTEM AND METHOD OF CONTROLLING FUEL CELL

A control method when pieces of control on various physical quantities collide with each other is provided. An upper limit current value ImaxA for realizing power control for preventing generated power from exceeding an upper limit value, voltage control for preventing generated voltage from falling below a lower limit value and current control for preventing generated current from exceeding an upper limit value is determined. Furthermore, a lower limit current value Imin for preventing the generated voltage from exceeding an upper limit value is determined. When ImaxA is less than Imin, the target value of the current value is set at ImaxA ((d), (e) and (f)).