초록 ▼

A fuel cell power generator having an output controlling system for preventing the deterioration of the fuel cell performance caused by fuel gas shortages. The fuel cell power generator includes a fuel reformer, a fuel cell, an inverter, and an output controlling system. The output controlling syste

A fuel cell power generator having an output controlling system for preventing the deterioration of the fuel cell performance caused by fuel gas shortages. The fuel cell power generator includes a fuel reformer, a fuel cell, an inverter, and an output controlling system. The output controlling system includes an output control regulator for controlling the output power of the inverter as close to the current value corresponding to the output power set value as possible, a current command computing unit, an inverter controller, and an output correction section. The output correction section includes an available output computing unit for computing the maximum available output power value of the fuel cell on the basis of the detected flow rate of fuel gas flowing into the fuel cell or fuel exhaust gas flowing out of the fuel cell; a low level selector for selecting either the computed maximum available output power value or the output power set value, whichever is the lower; and an output correction regulator for supplying the output control regulator with a signal for correcting the output power set value so as to control the detected output current from the fuel cell as close to the current value corresponding to the output current value of the low level selector as possible.

대표청구항 ▼

An output controlling system for controlling the output of a fuel cell power generator having a fuel cell which generates a direct-current output when supplied with fuel gas from a fuel reformer, the direct-current output being converted by inverting means into an alternating-current output to be fe

An output controlling system for controlling the output of a fuel cell power generator having a fuel cell which generates a direct-current output when supplied with fuel gas from a fuel reformer, the direct-current output being converted by inverting means into an alternating-current output to be fed to a power system, the output controlling system including: an output control regulator for controlling the output current of said inverter as close to the current value corresponding to the output power set value of said inverting means as possible; a current command value computing unit for updating a current command value on the basis of the output signal of said output control regulator; inverting means controller for controlling the output current of said inverting means as close to said current set value as possible; and output correction means, provided on the upstream side of said output control regulator, for correcting said output current set value of said inverting means so that the output power of said fuel cell is kept at a maximum available output power value of said fuel cell in accordance with either the state of the supply of said fuel gas to said fuel cell and/or the state of the consumption of said fuel gas by said fuel cell.