ABNORMALITY DIAGNOSTIC SYSTEM AND ABNORMALITY DIAGNOSTIC METHOD OF FUEL CELL POWER GENERATION SYSTEM, FUEL CELL POWER GENERATION SYSTEM, AND ITS OPERATION METHOD

摘要

PROBLEM TO BE SOLVED: To obtain necessary detection information even if monitor portions are reduced in the abnormality diagnosis of a fuel cell power generation system.

SOLUTION: Existence or nonexistence of the abnormality in a fuel cell stack or a power generation system containing the fuel cell stack is diagnosed from the magnitude of frequency component in a prescribed frequency range abstracted from voltage detected from a detection part using at least one cell constituting parts of the fuel cell stack. The cell forming the detection part is selected based on the intensity before shipment in the prescribed frequency range. Abnormality is accurately detected before it is grown.

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