Modeling and Mitigation of Multi-Loops Related Device Overvoltage in Three Level Active Neutral Point Clamped Converter

This article establishes an analytical model for the device drain-source overvoltage related to the two loops in three-level active neutral point clamped (3L-ANPC) converters. Taking into account the nonlinear device output capacitance, two common modulation methods are investigated in detail. The results show that the line switching frequency device usually has higher overvoltage, and the switchi...