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Methods for locating ground faults and insulation degradation condition in energy conversion systems

United States Patent

9,103,865
August 11, 2015
View the Complete Patent at the US Patent & Trademark Office
Methods for determining a ground fault or insulation degradation condition within energy conversion systems are described. A method for determining a ground fault within an energy conversion system may include, in part, a comparison of baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in an energy conversion system. A method for determining insulation degradation within an energy conversion system may include, in part, a comparison of baseline frequency spectra of differential current to a frequency spectra of differential current transient at start-up for a plurality of DC current carrying conductors in an energy conversion system. In one embodiment, the energy conversion system may be a photovoltaic system.
Agamy; Mohamed (Niskayuna, NY), Elasser; Ahmed (Niskayuna, NY), Galbraith; Anthony William (Salem, VA), Harfman Todorovic; Maja (Niskayuna, NY)
General Electric Company (Niskayuna, NY)
13/ 726,730
20140176151
December 26, 2012
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with U.S. government support under Contract No. DE-EE0000572 awarded by the Department of Energy (DOE). The U.S. government has certain rights in the invention.