Method and device for detecting underperforming PV modules in a PV system by using disconnect switches
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United States of America Patent
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Jun 25, 2013
Grant Date -
Aug 25, 2011
app pub date -
Feb 24, 2011
filing date -
Feb 24, 2010
priority date (Note) -
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Abstract
A measuring method for determining an output drop of a PV unit is provided. The PV unit is arranged within a photovoltaic system comprising a plurality of electrically parallel-connected PV units. Each PV unit can be removed from the parallel circuit by a switching device. Further, a total current measuring device for measuring the total current through all PV units of the parallel circuit is provided. The defective PV unit is determined in an evaluation unit by the connection and disconnection of a disconnect switch.
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