METHOD AND DEVICE FOR MONITORING A PHOTOVOLAIC SYSTEM
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United States of America Patent
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Jun 18, 2015
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Dec 18, 2012
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Abstract
A device and a method for monitoring a photovoltaic system having a number of parallel-connected strings routed towards a common connecting lead for a reverse current. In the method it is provided for a current flow to be detected in a preferred direction in each of the strings and for a first total current flow to be created therefrom, for a current flow to be detected in the preferred direction in the connecting lead and for a second total current flow to be created therefrom, and for the first total current flow to be compared with the second total current flow, wherein a reverse current is recognized if the first total current flow deviates from the second total current flow by more than a tolerance value.
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