| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance snow-melting effects by a method, wherein a bypass for reverse-flow preventing diode at the time of melting is selectively structured, and a power is applied only to a specified solar cell string. SOLUTION: At normal solar cell operation, all switchgears 31 to 33 are opened, and a power generated by solar cell strings 11 to 13 in a power conditioner 4 is collectively converted in reverse, and is supplied to a load 5 or system 6. At snow-melting, a melting switch 7 is manually turned on, and the power conditioner 4 is switched to a forward conversion, and the switchgears 31 to 33 for bypassing reverse flow-preventing diodes 21 to 23 of the solar cell strings 11 to 13 are selected by a switching circuit 8. Namely, power is applied on the solar cell strings 11, 12, and the power is not applied to the solar cell string 13.</p> |
