Development of a 10 kV three-phase transformerless inverter with 15 kV silicon carbide MOSFETs for grid stabilization and active filtering of harmonics

The implementation of 15 kV Silicon Carbide (SiC) MOSFETs in a three-phase, three-level active power filter of 100 kVA for a 10 kVAC grid and their challenges is shown. Due to the high switching frequency of 16 kHz, respectively 32 kHz ripple frequency, it will perfectly suited for active filtering of harmonics in the medium voltage grid.