| 摘要 |
<p>The invention relates to a method and device for safely switching a direct-voltage system (1), in particular a photovoltaic system, in the event of an arc occurring on the direct-current side, wherein the generated direct current and the produced direct voltage are set with regard to power guidance. In the event of sensor-detected arc, the power guidance (MPP) is adjusted and a power change of the arc is detected, wherein in the event of a power drop of the arc, a serial or parallel arc is detected according to the adjustment direction (ΔΡυο,ΔΡIK) of the power guidance (MPP). In the event of a serial arc a direct-current interruption is produced, and in the event of a parallel arc a short-circuit current is produced.</p> |
