一种低开关次数和高电压增益的准Z源逆变器不连续调制

doi:10.3969/j.issn.1008- 0198.2023.05.010

湖南电力 ›› 2023, Vol. 43 ›› Issue (5): 61-70.doi: 10.3969/j.issn.1008- 0198.2023.05.010

• “电力电子化新型电力系统主动支撑控制与优化运行关键技术”专栏 • 上一篇下一篇

一种低开关次数和高电压增益的准Z源逆变器不连续调制

易文静¹, 曹昆¹, 孟雨薇¹, 罗朝旭¹, 程谆²

1.湖南工业大学电气与信息工程学院,湖南株洲 412007;
2.湖南铁道职业技术学院,湖南株洲 412001

收稿日期:2023-09-10 修回日期:2023-09-25 出版日期:2023-10-25 发布日期:2023-11-03
通信作者: 程谆(1988),女,湖南宁乡人,讲师,硕士,通信作者,主要研究方向为现代电力电子技术与系统。
作者简介:易文静(1998),女,重庆人,硕士研究生在读,主要研究方向为电力电子与新能源发电技术。曹昆(2000),男,安徽怀宁人,硕士研究生在读,主要研究方向为电力电子与新能源发电技术。孟雨薇(1999),女,湖南南县人,硕士研究生在读,主要研究方向为电力电子与新能源发电技术。罗朝旭(1987),男,湖南衡阳人,讲师,硕士生导师,主要研究方向为微电网逆变器控制。
基金资助:
国家自然科学基金项目(52207205);湖南省自然科学基金项目(2022JJ50094)

Discontinuous Modulation for a Quasi-Z-Source Inverter With Low Switching Times and High Voltage Gain

YI Wenjing¹, CAO Kun¹, MENG Yuwei¹, LUO Zhaoxu¹, CHENG Zhun²

1. College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China;
2. Hunan Railway Professional Technology College, Zhuzhou 412001, China

Received:2023-09-10 Revised:2023-09-25 Online:2023-10-25 Published:2023-11-03

摘要/Abstract

摘要： 准Z源逆变器因输入电流连续、结构简单等优势被广泛地用来代替传统的两级结构。针对现有调制策略存在的生成栅极信号复杂、逆变桥开关器件切换次数过多、开关管的开关损耗大和电压增益不足的问题,提出一种低开关次数和高电压增益的准Z源逆变器不连续调制策略。该策略在每个周期内使用更少的参考信号即可生成栅极控制信号,同时这种不连续调制策略的开关信号在每个基频的部分周期内被钳位到正极或负极,使得逆变器开关次数显著减少,进而降低了开关管的开关损耗。此外,通过合理设计直通时间和直通插入位置,获得最大输出电压增益。MATLAB/PLECS仿真和RT-LAB实验结果验证了该调制策略的正确性和有效性。

关键词: 准Z源逆变器, 脉冲宽度调制, 最大升压能力, 开关损耗

Abstract: The quasi-Z-source inverter is widely used to replace traditional two-stage structures due to its advantages of continuous input current and simple structure. Aiming at the problems of complex gate signals generation, excessive switching times of inverter switches, high switching losses, and insufficient voltage gain in the existing modulation strategies, a discontinuous modulation for quasi-Z-source inverter with low switching times and high voltage gain is proposed, which uses fewer reference signals to generate gate signals. At the same time, the switching signals of this discontinuous modulation strategy are clamped to positive or negative pole, which significantly reduces the switching times of the inverter, thereby reducing the switching losses of the switches. In addition, the shoot-through duration and the insertion position are reasonably planned to achieve the greatest voltage gain. The correctness and effectiveness of the modulation strategy are verified by MATLAB/PLECS simulation analysis and RT-LAB experimental results.

Key words: quasi-Z-source inverter, pulse width modulation, high voltage gain, switching times

中图分类号:

TM46

易文静, 曹昆, 孟雨薇, 罗朝旭, 程谆. 一种低开关次数和高电压增益的准Z源逆变器不连续调制[J]. 湖南电力, 2023, 43(5): 61-70.

YI Wenjing, CAO Kun, MENG Yuwei, LUO Zhaoxu, CHENG Zhun. Discontinuous Modulation for a Quasi-Z-Source Inverter With Low Switching Times and High Voltage Gain[J]. Hunan Electric Power, 2023, 43(5): 61-70.

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一种低开关次数和高电压增益的准Z源逆变器不连续调制

Discontinuous Modulation for a Quasi-Z-Source Inverter With Low Switching Times and High Voltage Gain

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