| 摘要 |
PROBLEM TO BE SOLVED: To provide a PV power conditioner capable of performing appropriate stop control without increasing the manufacturing cost.SOLUTION: A PV power conditioner is constituted to include an inverter circuit 10 for outputting a DC voltage inputted from a solar cell 2 to a system power supply 4 while converting the DC voltage into an AC voltage, an inverter control unit 30 for controlling the switching operation of the inverter circuit 10 on the basis of the difference between an input voltage Vand a reference voltage Vref, a MPPT control unit 18 for adjusting the reference voltage Vref so as to maximize the output power from the solar cell 2, an operating condition discrimination unit 19 for discriminating the operating condition of the inverter circuit 10, and a power supply control unit 20 performing shutdown processing on the basis of the comparison results of the input voltage Vwith a stop determination threshold Vsth. The inverter control unit 30 stops the inverter circuit 10 when the shutdown processing is ended, and the period when the inverter circuit 10 is continuing the powering operation reaches time T1. |
