| 摘要 |
A method is described for detecting a parallel arc in a photovoltaic device, comprising N (N=1 or N>1) photovoltaic modules, connected to a charge device (10) having a capacitive behaviour for the modules, this method comprising: a) detecting, across the main terminals of said device, the evolution of the voltage over time, at least during the formation of the electric arc, b) identifying a negative voltage variation between a first zone (RI) with stable voltage and a second zone (R2) with stable voltage for a period of at least 5 μs, which immediately follows said voltage variation, and c) determining whether the voltage variation is comprised between a maximum value Vmax, greater than or equal to 100 V, and a minimum valve Vmin, less than or equal to 30 V, with a lowering time of that variation comprised between a minimum duration Tmin greater than or equal to 0.01 μs and a maximum duration Tmax less than or equal to 10 μs. |
