METHODS FOR LOCATING GROUND FAULTS AND INSULATION DEGRADATION CONDITION IN ENERGY CONVERSION SYSTEMS

摘要

PROBLEM TO BE SOLVED: To provide methods for detecting a ground fault or insulation degradation condition within energy conversion systems.SOLUTION: A method for determining a ground fault within an energy conversion system may include, in part, a comparison of a baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in the 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 frequency spectra of differential current transient at start-up for a plurality of DC current carrying conductors in the energy conversion system. In one embodiment, the energy conversion system is a photovoltaic system.