基于串联IGCT的双有源桥直流变压器三臂零电压开关梯形调制策略

This article proposes an improved trapezoidal modulation (ITM) strategy to achieve zero voltage switching (ZVS) in three arms of a series-connected device-based dc transformer equipped with lossless buffer capacitors. To overcome the challenge of achieving ZVS in arms 1, 2, and 4 under light-load and no-load conditions, the ITM introduces an auxiliary phase-shift angle. By analyzing current stress...