| 摘要 |
A power supply and a method for a line connection type fuel cell system are provided to prevent an error of the fuel cell system due to erroneous operation of a PCS control board by operating the fuel cell system after stably supplying power to the PCS control board. A power supply for a line connection type fuel cell system includes a fuel cell(10), a DC/DC conversion unit(20), an inverter(30), a line power supply unit(40), a triac(Tr), a switching unit(90), a controller, a BOP power supply unit(50), and a regulator(60). The DC/DC conversion unit(20) boosts a DC current outputted from the fuel cell(10). The inverter(30) converts a DC voltage to an AC voltage and applies the converted AC voltage to a load. The line power supply unit(40) generates commercial power and supplies the fuel cell(10) and each load with the commercial power. The BOP power supply unit(50) converts the commercial power to a certain level of the DC voltage and supplies the DC voltage as a BOP power source. The regulator(60) and a PCS control power supply unit(70) supplies a PCS control power source. The switching unit(90) selects the PCS control power source outputted from the regulator(60) or the PCS control power source outputted from the PCS control power supply unit(70). The controller controls switching of the triac(Tr) and the switching unit(90). |
