| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ground fault detection apparatus for a photovoltaic power generation system in which a spot where a ground fault occurs can be identified easily in a short time. <P>SOLUTION: A ground fault detection apparatus 2 for a photovoltaic power generation system 1 comprises a plurality of first connection boxes 7 electrically connecting a plurality of solar cell strings 6 in parallel, respectively, a second connection box 8 electrically connecting the plurality of first connection boxes 7 in parallel, a power conditioner 11 which is electrically connected to the second connection box 8 and interconnects the solar cell strings 6 to a power system, a plurality of shutters 12, 16 and 17 disposed in each of the first connection boxes 7 or the second connection box 8 and capable of shutting off circuits between the solar cell strings 6 and the first connection boxes 7 or between both the connection boxes 7 and 8, a ground fault detection circuit 19 which is provided in the power conditioner 11 and detects the presence/absence of a ground fault in the circuit from the solar cell strings 6 to the power conditioner 11, and a ground fault notification device 21 which is connected to the ground fault detection circuit 19 and notifies the presence/absence of the ground fault of the circuit from the solar cell strings 6 to the power conditioner 11 to the plurality of shutters 12, 16 and 17. <P>COPYRIGHT: (C)2013,JPO&INPIT |
