Middle-Level SHE Pulse-Amplitude Modulation for Cascaded Multilevel Inverters

被引：52
|
作者：
Kamani, Piyush L. [1 ]
Mulla, Mahmadasraf A. [1 ]
机构：
[1] Sardar Vallabhbhai Natl Inst Technol, Dept Elect Engn, Surat 395007, India
来源：
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2018年 / 65卷 / 03期
关键词：
Middle-level; multilevel inverters; pulse-amplitude modulation (PAM); pulse-width modulation (PWM); selective harmonic elimination (SHE); ELIMINATION;
D O I：
10.1109/TIE.2017.2742990
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This letter presents a novel middle-level selective harmonic elimination-pulse-amplitude modulation (SHE-PAM) method to calculate switching angles and to synthesize reference voltage for variable dc voltage sources connected to multilevel inverter. Instead of conventional multivariable nonlinear transcendental SHE-pulse-width modulation (SHE-PWM) equations or polynomial equations derived from them, the proposed method works on univariate linear equations. Due to reduced computational complexities, it can be implemented in real-time for the inverter having a large number of levels. Without amplifying themagnitude of higher order harmonics, proposed method eliminates a significant number of harmonics as compared to SHE-PWM and conventional SHE-PAM methods. The total harmonic distortion (THD) of the output voltage is a function of only number of voltage levels and remains constant for a whole range of modulation index. The theoretical analysis and working characteristics of suggested method are validated by simulation and experimental studies.
引用
收藏
页码：2828 / 2833
页数：6
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