| 摘要 |
PURPOSE: To provide an operation method of a fuel cell power generation device and an auxiliary machine power supply circuit by which electric power can be supplied to an auxiliary machine without causing instantaneous interruption even when operation modes are switched to/from each other besides simplification of the circuit. CONSTITUTION: In a fuel cell power generation device to supply electric power to an electric power system by converting output of a fuel cell 2 into an alternating current by an inverter 6, an auxiliary machine power supply circuit 13 leading to an auxiliary machine 4 is connected by branching off from a power transmission circuit 12 to connect the inverter and the electric power system to each other, and a linking switch S1 is connected to the inverter side, and a linking switch S2 is connected to the electric power system side by sandwiching a branch point P of the auxiliary machine power supply circuit. ON/OFF control is selectively performed on these linking switches according to respective operation modes of 'starting', 'standby operation', 'linking operation' and 'stopping operation' of a fuel cell power generation plant, and electric power is supplied to the auxiliary machine while operating the inverter in a linking state with the electric power system in respective operation modes of a starting time 'power generation-temperature rise' step and a stopping operation time 'power generation-temperature drop' step including the 'linking operation'. |
