摘要详情

ID / 提交时间

89 / 2022-07-01 09:56:05

标题

Analysis and Solution of Voltage Overshoot of Keep-Off State Devices in Three Level Simplified Neutral Point Clamped Inverter

关键字

3L-SNPC, voltage overshoot, keep-off state devices, switching transients, snubber circuit

主题及专题

Power Electronics Technology and Application > Power Converter Topology

状态

终稿

作者

Xinyue Guo / Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology

Menghu Liu / Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology

Jiajia Guan / Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology

Cai Chen / Huazhong University of Science and Technology；State Key Laboratory of Advanced Electromagnetic Engineering and Technology

Yong Kang / Huazhong University of Science and Technology;School of Electrical and Electronic Engineering

Rui Li / Wuhan Second Ship Design and Research Institute

Jiuqing Cai / Wuhan Second Ship Design and Research Institute

Xiang Jin / Wuhan Second Ship Design and Research Institute

Peng Li / Wuhan Second Ship Design and Research Institute

Jing Chen / Wuhan Second Ship Design and Research Institute

Lei Yang / Beijing Institute of Precision Mechatronics and Controls

摘要

This paper demonstrates a unique voltage overshoot phenomenon of keep-off state devices in three level simplified neutral point clamped (3L-SNPC) inverter which comprises a DC-DC chopper and a three-phase two-level (2L) inverter. The issue is found to be related to the switching action of the DC-DC chopper and will introduce voltage overshoot on the constant keep-off state devices in the 2L-inverter. The switching transients of different switching cases are analyzed to reveal the mechanism of the voltage overshoot phenomenon. Based on the analysis, a snubber circuit is used to suppress the voltage overshoot. Simulations using LTspice software validate the analysis and the solution.