New three-level voltage source inverter with different 25 space voltage vectors

M. H. Saied, M. Z. Mostafa, T. Abdel-Moneim, Hasan A. Yousef
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引用次数: 2

Abstract

This paper presents a new switching strategy controlling a new three-level voltage source inverter, resulting in different 25 space voltage-vectors. The new inverter combines some desirable features of two and three-level inverters. The proposed open-leg switching strategy (OLSS) intentionally opens one of the three inverter-legs per-time, in a pre-planned sequence. Thus, the number of allowed states becomes 64 compared to 27 originally proposed by other modulation strategies. For a wye-connected load operating at low modulation index (M
采用不同25空间电压矢量的新型三电平电压源逆变器
本文提出了一种控制新型三电平电压源逆变器产生不同25个空间电压矢量的开关策略。新的逆变器结合了二电平和三电平逆变器的一些理想特性。所提出的开腿开关策略(OLSS)有意地按照预先计划的顺序每次打开三个逆变器腿中的一个。因此,与其他调制策略最初提出的27个状态相比,允许的状态数变为64个。对于在低调制指数(M< 0)下工作的单向连接负载。(5 p.u),输出相电压变为7级12步波形,而不是6步波形。因此,总谐波失真被大大降低。提出了三种新的传导模式,每种模式都验证了降低共模电压时变(dv/dt),低三次谐波含量和降低开关频率谐波。对于更高的调制指数,提出了第四导通模式,消除了中性点电流中的低频谐波,从而减小了直流电容的尺寸,并降低了成本。给出了分析模型、计算机仿真结果和实验验证。
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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