| 摘要 |
<P>PROBLEM TO BE SOLVED: To execute stable power generation operation by improving control accuracy even if fuel cell bodies have different individual characteristics and different deterioration states. <P>SOLUTION: A fuel cell power generation system is composed of: a fuel cell body; a fuel processor for supplying hydrogen to an anode of the fuel cell body; an air supply device for supplying oxygen to a cathode of the fuel cell body; and a controller for controlling the fuel processor and the air supply device. The controller is provided with: a calculation means 52, which obtains a relationship between a power generation voltage and a current by calculation using least-squares while taking in a voltage and a current of the fuel cell body detected by a detection means; a memory 53, which tabulates the relationship between the voltage and the current obtained by the calculation means at fixed intervals so as to always store it as the newest IV characteristic; and a determination means 54 that compares the newest IV characteristic stored in the memory with a present operating voltage of the fuel cell body 1 so as to transmit control output when a difference between them is larger than a threshold set in consideration of the newest IV characteristic. <P>COPYRIGHT: (C)2009,JPO&INPIT |
