基于Z源的开关电容器,具有修改的调制策略的九级增压逆变器
Ahmed R Hasouna1, Sabry A Mahmoud2, Awad E El-Sabbe2
1Electrical Engineering Department, Faculty of Engineering, Menoufia University, Shebin El-Kom, 32511, Egypt. ahmed.hassona@sh-eng.menofia.edu.eg.
Scientific reports
|November 23, 2024
概括
本研究介绍了一种基于Z源 (ZS) 的开关电容器多级逆变器 (SC-MLI),可以减少电容器充电的冲动电流. 新的调制策略提高了直流链的利用率,并为可再生能源提供了高电压增益.
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:
- 多级逆变器 (MLI) 对于电力转换至关重要,特别是用于可再生能源的整合.
- 传统的MLIs面临着电压增益和冲进电流的挑战,限制了它们的效率和组件寿命.
- Z源 (ZS) 网络提供固有的电压提升功能,但需要谨慎的控制策略.
研究的目的:
- 介绍一个新的基于Z源 (ZS) 的交换电容多级逆变器 (SC-MLI) 拓.
- 为了减轻电容器充电的冲动电流,使用修改后的调制策略.
- 为了实现适用于光伏 (PV) 和燃料电池 (FC) 等低压可再生能源的高电压增益.
主要方法:
- 基于ZS的SC-MLI拓的开发,包括8个电源开关,5个电容器,2个电感器和4个二极管.
- 实施一个修改的水平移动阴影脉冲宽度调制 (LS-SPWM) 策略.
- 数学分析增强计算和DC-link利用情况.
- 使用MATLAB/Simulink进行模拟,使用Altair PSIM进行功耗/效率分析.
- 用原型在各种负载和调制条件下进行实验验证.
主要成果:
- 拟议的SC-MLI拓产生了九个输出电压级别,电压增加了四倍.
- 修改后的调制策略提高了直流链的利用率,特别是在更高的调制指数下.
- 该ZS网络有效地减少了开关电容器充电的冲动电流.
- 对比研究和实验结果证实了拓在输出特性和硬件要求方面的优势.
结论:
- 基于ZS的SC-MLI与修改的调制策略提供了一个可行的解决方案,用于高效地从低压可再生能源转换电力.
- 该拓在电压增益,减少冲进电流和改进直流链路利用方面表现出卓越的性能.
- 这些发现通过全面的模拟和实验验证得到了验证,突出了实际应用.
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