一个增强的单相近似Z源切换电容七级逆变器,用于光伏应用的修改后的SPWM
Semko Hosseini1, Seyed Hossein Hosseini2,3, Mehran Sabahi4
1Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, 51666-16471, Iran. semkohosseini@tabrizu.ac.ir.
Scientific reports
|March 23, 2025
概括
这项研究介绍了一种改进的准Z源7级逆变器 (qZ-SC7LI),可以消除泄漏电流并增强电压增益. 一种经过修改的调制技术减少了输出电压变化,并改善了电网注入电流的总波扭曲.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 可再生能源系统可再生能源系统
背景情况:
- Z源拓提供了诸如冲动电流控制和增强电压增益等优势.
- 交换电容多层逆变器 (SC-MLIs) 与Z源网络相结合,带来了独特的挑战和机遇.
- 无变压器逆变器对于减少功率损失和系统重量至关重要.
研究的目的:
- 提出一个改进的对称单相无变压器类Z源7级逆变器 (qZ-SC7LI).
- 为了消除泄漏电流和解决现有拓学的射击状态限制.
- 为了增强电压增益,提高免疫力,减少总波扭曲 (THD).
主要方法:
- 对于qZ-SC7LI来说,一个新的电路配置旨在消除泄漏电流.
- 开发了一种经过修改的调制技术,以在各种电压水平上创建射透状态.
- 使用PSIM软件进行模拟,并在1.2kVA原型上进行实验验证.
主要成果:
- 拟议的qZ-SC7LI成功消除了泄漏电流.
- 修改后的调制技术减少了输出电压变化,并提高了逆变器的性能.
- 减少了注入电流的总波扭曲 (THD) 和更小的过器尺寸.
结论:
- 改进的qZ-SC7LI带有修改的调制技术,与现有拓相比,提供了更高的性能.
- 该拓有效地处理反应功率,并从直流源中持续提取电流.
- 拟议的解决方案通过模拟和实验结果得到验证,证明其实际适用性.
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