Nine-level high-frequency inverter
Nine-level high-frequency inverter
复制标题
九电平高频逆变器
DOI：
10.1049/iet-pel.2018.5460
复制
发表时间：
2019
影响因子：
2
通讯作者：
Wu Yu
中科院分区：
文献类型：
--
作者：
Ji Baojian;Hong Feng;Huang Xiaodong;Wu Yu
在高频交流（HFAC）配电系统中，传统逆变器仍然存在开关频率高、电路结构复杂、参数设计困难等问题。提出了一种基于正激变换器的多电平高频逆变器拓扑结构，实现了输入输出的电气隔离。通过引入变匝比技术，实现了九电平输出，有利于降低输出谐波。通过对输出波形的傅里叶分析，采用选择性谐波消除法进一步减小输出谐波失真。此外，高频交流输出可以在一个较低的开关频率，因为最大开关频率仅为输出频率的两倍。本文详细分析了该逆变器的工作原理和参数设计。最后通过仿真和实验验证了该逆变器的可行性。
In the high‐frequency AC (HFAC) power distribution system, problems such as high switching frequency, a complicated circuit configuration and difficult parameter design still exist in the traditional inverters. A multi‐level high‐frequency inverter topology based on a forward converter is proposed in this study, which implements the electrical isolation of input and output. With the introduction of variable turns ratio technology, the nine‐level output is achieved, which is conductive to the decrease of output harmonics. The selected harmonic elimination method is also adopted to further reduce the output harmonic distortion through the Fourier analysis of output waveforms. Besides, the HFAC output can be achieved at a lower switching frequency for the maximum switching frequency is only double the output frequency. The detailed analysis on operating principles and parameter design of the proposed inverter are provided in this study. Finally, the feasibility of the inverter is verified by the simulations and experiments.