| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify connection with a commercial power supply network compared with the traditional system by effectively avoiding an inverse load flow to the commercial power supply network at the time of a power failure, etc.SOLUTION: The photovoltaic power generation system includes: a solar panel 15 for outputting electric power from sunlight; a change-over switch 13 for selectively outputting electric power from a commercial power source (3) or the electric power from the solar panel 15; an auxiliary power unit 14 which recharges a battery with electric power output by the change-over switch 13 and outputs the electric power stored in the battery; control relays 11C, 11D on a load side which selectively output the electric power from the auxiliary power unit 14 or electric power from the commercial power source (3) to loads 9C, 9D; a control relay 12 on a change-over switch side which blocks input of the electric power from the commercial power source (3) to the change-over switch 13; and a controller 17 for controlling an overall operation. At the time of failure of the commercial power source (3), through control of the controller 17, the battery is recharged with the electric power from the solar panel 15 and the loads 9C, 9D are driven with the electric power stored in the battery with connection between a power supply network of the commercial power source (3) and the change-over switch 13 being blocked by the control relay 12 on the change-over switch side.</p> |
