期刊论文

Harmonic analysis of SPWM voltage source inverter based on Matlab

中文

沈阳师范大学学报(自然科学版)

1673-5862

2011

29

3

391-394

10.3969/j.issn.1673-5862.2011.03.015

湖南省科技计划项目（2010GK3179）； 湖南省自然科学基金资助项目（07JJ6119）；

本校为第一机构

PWM电压型逆变器接入电网时将引起谐波,从而影响电能质量,对其进行研究具有十分重要的意义,根据SPWM的基本原理与傅里叶级数理论,建立了SPWM电压型逆变器输出波形的数学模型.通过理论分析与计算,得到了输出谐波在变频变压过程中的分布规律,利用matlab进行了仿真,得出了“变频将引起谐波分布中心的迁移”、“变压将引起谐波幅值的变化,且谐波幅值与基波幅值的变化方向相反”等结论.对SPWM技术的应用具有一定的指导意义.

PWM voltage inverter will cause harmonics in the grid,thus affecting the power quality,so research on it is of great significance.According to the basic principle of SPWM and Fourier series theory,one mathematical model of aSPWM voltage source inverter output waveform be established.Through theoretical analysis and calculation,it gets the distribution of output harmonics in the frequency transformer,by simulation using matlab,it suggests that to change the frequency will cause the migration of the harmonic distribution center;Changing the voltage will cause the harmonic amplitude to change,and...