Detection and Location Approach to Incipient Grounding Defect in Transformer Winding Based on Sequence Voltage Ratios at PV Inverter Switching Frequency
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DOI: 10.1109/tie.2022.3199923
Abstract: Silicon carbide (SiC) power devices are used increasingly in photovoltaic (PV) inverters, with the high switching frequency (fs) and voltage slew rate. For the SiC-based-inverter-fed transformer, the ageing of groundwall insulation is aggravated and the… read more here.
Keywords: grounding defect; switching frequency; sequence; voltage ... See more keywords