| 摘要 |
<p>The invention relates to a photovoltaic system (1) having a plurality of strings (5), each comprising a plurality of photovoltaic modules (4) connected exclusively in series, having bus conductors (8, 9) to which the strings are connected in parallel with each other, and having a transformer (12) for feeding electrical energy from the bus conductors (8, 9) into a power grid (2), wherein the voltage drop between the bus conductors (8, 9) can be adjusted by means of a controller (11) of the transformer (12), wherein a current sensor (10) is provided for each string (5), detecting at least whether a reverse current is flowing to the string (5) and reporting the reverse current to the controller (11), and the controller (11) reduces system voltage present between the bus conductors (8, 9) in order to stop the reverse current.</p> |
