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Technical Lecture

Solid-State Transformers

T23.7 - Comparative Performance Analysis of Medium Voltage 3L-ANPC and 3L-DNPC Pole Enabled by Series-Connection of 10kV SiC MOSFETs and 10kV SiC JBS Diodes for Sine Triangle PWM Operation

Wednesday, March 19, 2025
4:00 PM – 4:20 PM ET
Location: Level Three, A314
This digest presents a comparative performance analysis of Medium Voltage three-level Active Neutral Point Clamped (ANPC) and Diode Neutral Point Clamped (DNPC) converters, utilizing series-connected 10kV SiC MOSFETs and 10kV SiC JBS diodes. The switching transitions between complementary SiC MOSFETs and SiC JBS diodes have been mathematically modeled for the 3L-DNPC pole. Similarly, the switching transitions between complementary series-connected SiC MOSFETs and neutral-point clamping MOSFETs have been modeled for the 3L-ANPC pole. To ensure accurate modeling of switching transitions, factors such as reverse recovery current during body diode turn-off, variable device capacitance, base plate current, and parasitic bus bar inductance have been taken into account. Dynamic Voltage Balancing and switching loss minimization were achieved through two distinct turn-off delay control strategies and R-C snubber design methodologies. Finally, the Dynamic Voltage Balancing scheme was validated on a three-level test ben