三电平简化中性点箝位逆变器保持状态器件电压超调分析及解决方法

2022 IEEE 3rd China International Youth Conference on Electrical Engineering (CIYCEE) Pub Date : 2022-11-03 DOI:10.1109/CIYCEE55749.2022.9957123

X. Guo, Menghu Liu, Jiajia Guan, Cai Chen, Yong Kang, Rui Li, Peng Li, Jiuqing Cai, Xiang Jin, Jing Chen, Lei Yang

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引用次数: 0

摘要

本文论述了由DC-DC斩波器和三相二电平(2L)逆变器组成的三电平简化中性点箝位(3L-SNPC)逆变器中保持状态器件的一种独特的电压超调现象。发现该问题与DC-DC斩波器的开关动作有关，并将在2l逆变器的恒定保持状态器件上引入电压超调。分析了不同开关情况下的开关瞬态，揭示了电压超调现象的机理。在分析的基础上，采用缓冲电路抑制电压超调。使用LTspice软件进行仿真验证了分析和解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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

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.

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2022 IEEE 3rd China International Youth Conference on Electrical Engineering (CIYCEE)

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