| 摘要 |
<p>The present invention concerns an apparatus for determining if a fault exists in a photovoltaic source. The apparatus comprises:
- means for controlling the power converter in order to get at the output of the photovoltaic source a first voltage value (V 1 ),
- means for obtaining a first current value (I 1 ) provided by the photovoltaic source when the photovoltaic source provides the first voltage value,
- means for controlling the power converter in order to get at the output of the photovoltaic source a second voltage value (V 2 ) upper than the first voltage value,
- means for obtaining a second current value (I 2 ) provided by the photovoltaic source when the photovoltaic source provides the second voltage value,
- means for obtaining a threshold value (Th) from the first current value and the first voltage value,
- means for detecting a fault in the photovoltaic source according to at least the second current value and the threshold value.</p> |
