Modified SVPWM Algorithm for Three Level VSI With Synchronized and Symmetrical Waveforms
Modified SVPWM Algorithm for Three Level VSI With Synchronized and Symmetrical Waveforms
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DOI：
10.32628/ijsrst196249
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发表时间：
2019-03
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通讯作者：
Jalla Sowndarya;M. Shekar;N. V. V. Kumar-N.-V.-V.-Kumar-2297421384
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作者：
Jalla Sowndarya;M. Shekar;N. V. V. Kumar-N.-V.-V.-Kumar-2297421384
为了产生所需的参考矢量比三角比较的PWM技术为三电平逆变器的空间矢量PWM（SVPWM）策略包含更广泛的开关序列的选择。这种基于空间矢量的PWM技术涉及多个步骤。这些步骤在计算上是详尽的。SVPWM已应用于三相逆变器控制系统中。中心对齐PWM是单片机实现空间矢量脉宽调制（SVPWM）最有效的方法，因为它可以很容易地产生多电平逆变器的中心对齐PWM来产生空间矢量脉宽调制（SVPWM）信号，这一概念引出了该方法。通过该算法生成逆变器桥臂开关时间，并且中间矢量开关时间以采样间隔为中心。该算法不需要任何扇区标识。因此，它减少了计算时间。相邻的电压空间矢量形成小三角形，称为扇区。多电平变换器可以满足与减少谐波失真和降低电磁干扰相关的额定功率和电能质量的日益增长的需求。此外，为了优化开关波形，空间矢量脉宽调制算法提供了很大的灵活性。最后通过MATLAB/SIMULINK对仿真结果进行了验证
To generate the required reference vector than triangle comparison based PWM techniques for three-level inverters the space vector based PWM (SVPWM) strategies contain broader choice of switching sequences. This space vector based PWM technique involves in various steps. These steps are computationally exhaustive. The SVPWM has been used in three phase inverter control system. The center-aligned PWM is the most effective way for the Microprocessor Control Unit implementation of the SVPWM, because it can easily generate the center aligned PWM of the multilevel inverters for generation of the signal of space vector pulse width modulation (SVPWM), this concept brings out the method. The inverter leg switching times are generated by this algorithm and middle vector switching times are centered in a sampled interval. The proposed algorithm does not require any sector identification. And it reduces the computational time as a result. The adjacent voltage space vectors are forming the small triangles it is called sectors. Multilevel converters can meet the increasing demand of power ratings and power quality associated with reduced harmonic distortion and lower electromagnetic interference. Furthermore to optimize switching waveforms, space vector pulse-width modulation algorithms offer great flexibility among them. Finally the results are verified through MATLAB/SIMULINK