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DEVICES AND TECHNIQUES FOR DETECTING FAULTS IN PHOTOVOLTAIC SYSTEMS

United States Patent Application

20150054523
A1
View the Complete Application at the US Patent & Trademark Office
Devices and techniques for detecting faults (e.g., ground faults) in photovoltaic (PV) systems are provided. A fault-detection impedance component may be included in a PV system on the path to equipment ground. The PV system may determine whether a ground fault exists based, at least in part, on a measured impedance between a conductor of the PV system and a ground node of the PV system, and on a reference impedance. When it is determined that a ground fault exists in the PV system, action may be taken to mitigate the ground fault.
Perkinson, James R. (Medford, MA)
Fraunhofer USA, Inc. (Plymouth MI)
14/ 469,334
August 26, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under Grant Nos. DE-EE0006035.000 and DE-EE0006035-005 awarded by the Department of Energy. The government has certain rights in this invention.