BREAKDOWN DETECTION DEVICE AND DETECTION METHOD THEREOF

摘要

There is a fault detecting apparatus 1 for detecting a fault in an electric circuit including two strings STa and STb connected parallel to respectively connect PV arrays 2a and 2b with an inverter 5 and including wires Lp and Ln that aggregates two strings STa and STb and to connect the aggregated strings STa and STb with the inverter 5. The fault detecting apparatus 1 includes detecting a current Iap flowing through a wire STap of the string STa, detecting a current Ip flowing through the aggregating wire Lp, and detecting the fault when it is detected that the current Iap flows in the string STa and it is detected that the current Ip does not flow in the aggregating wire Lp.