Selective Harmonic Mitigation Technique for High-Power Converters
Selective Harmonic Mitigation Technique for High-Power Converters
复制标题
DOI：
10.1109/tie.2009.2026759
复制
发表时间：
2010-07
影响因子：
7.7
通讯作者：
J. Napoles;J. Galván;Ramón Portillo Guisado;L. Franquelo;Miguel Angel Aguirre Echánove
中科院分区：
文献类型：
--
作者：
J. Napoles;J. Galván;Ramón Portillo Guisado;L. Franquelo;Miguel Angel Aguirre Echánove
在高功率应用中，由于热损耗，最大开关频率受到限制。这导致输出波形高度失真。在这样的应用中，有必要使用庞大的无源滤波系统对输出波形进行滤波。最近提出的选择性谐波抑制脉宽调制（SHMPWM）技术产生的输出波形的谐波失真是有限的，满足特定的电网代码时，开关角的数量是足够高的。先前已经提出了使用等于750 Hz的开关频率的相关技术。在本文中，一个特殊的实现SHMPWM技术优化非常低的开关频率进行了研究。将SHMPWM应用于三电平中点箝位变换器，得到了开关频率等于350 Hz的实验结果。结果表明，SHMPWM技术改善了以前的选择性谐波消除脉宽调制技术的结果非常低的开关频率。这一事实突出表明，SHMPWM技术在高功率应用中非常有用，导致其用于大体积和昂贵的滤波元件的重要减少。
In high-power applications, the maximum switching frequency is limited due to thermal losses. This leads to highly distorted output waveforms. In such applications, it is necessary to filter the output waveforms using bulky passive filtering systems. The recently presented selective harmonic mitigation pulsewidth modulation (SHMPWM) technique produces output waveforms where the harmonic distortion is limited, fulfilling specific grid codes when the number of switching angles is high enough. The related technique has been previously presented using a switching frequency that is equal to 750 Hz. In this paper, a special implementation of the SHMPWM technique optimized for very low switching frequency is studied. Experimental results obtained applying SHMPWM to a three-level neutral-point-clamped converter using a switching frequency that is equal to 350 Hz are presented. The obtained results show that the SHMPWM technique improves the results of previous selective harmonic elimination pulsewidth modulation techniques for very low switching frequencies. This fact highlights that the SHMPWM technique is very useful in high-power applications, leading its use to an important reduction of the bulky and expensive filtering elements.