摘要
提出了一种能够抑制PWM逆变器电流纹波的变开关频率调制方法。深入分析了PWM逆变器输出电流的特点,推导了电流纹波的解析表达式。通过使用该方法进行调制,可以使逆变器在不牺牲效率的前提下,有效降低电流纹波。与传统的恒定开关频率三次谐波注入法相比,所提出的变开关频率调制方法能够进一步提升电流纹波的抑制能力。最后,通过实验对所提调制方法的有效性进行了验证。
The main content of the paper is to propose a new variable switching frequency modulation for suppressing the current ripple of pulse-width-modulation(PWM)inverter.The characteristics of the output current are analyzed,and the analytical expression of the current ripple is derived.Using this modulation method,the inverter can effectively reduce down the current ripple without any sacrifice of efficiency.Compared with the traditional constant switching frequency modulation method with third harmonic injection,the proposed variable switching frequency modulation can further improve the current ripple suppression capability.Finally,experiments verified the theoretical findings.
作者
李艳丽
王辉
Li Yanli;Wang Hui(Shandong Electric Power Engineering Consulting Institute Crop.,Lid.,Ji'nan 250013,China;Key Laboratory of Grid Intelligent Dispatching and Control Section,Shandong University,Ji'nan 250061,China)
出处
《电测与仪表》
北大核心
2021年第2期190-195,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金面上项目(51577109)。
关键词
逆变器
脉冲宽度调制
变开关频率
电流纹波
inverter
pulse width modulation
variable switching frequency
current ripple
