摘要
针对多电平逆变器提出一种简化的电压空间矢量脉宽调制方法,该方法是先将电压矢量向复平面分解,并以相应的基准对分解后的横纵坐标进行标幺化,然后通过参考电压矢量来选择三个电压矢量和对应的作用时间,最后再将所选择的电压矢量变换为对应的三相电压波形。该方法具有实现简单、通用性强等优点,而且还具有较好的抑制多电平逆变器共模电压的作用。通过Matlab/Simulink仿真,证明了该方法的正确性和可行性。
A simpler method of voltage space vector pulse width modulation based on mutli-level inverter is presented. Firstly, voltage space vectors are decomposed in complex plane. Moreover, decomposed abscissa and ordinate are normalized with per unit system transform. And then, three voltage vectors and their operation time are selected with reference vohage vectors. Finally, the selected voltage vectors are transformed into corresponding three phase voltage waveforms. This method has many strongpoints, such as realization briefness and better universality, moreover, this method also has better effect of suppressing multi-level inverter＇s common-mode voltage. Matlab/Simulink simulation results prove that the method is correct, and has some applicable values in field of high voltage variable frequency and power system.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2008年第6期124-128,共5页
Proceedings of the CSU-EPSA
关键词
共模电压
H桥逆变器
计算机仿真
电压空间矢量脉宽调制
common-mode voltage
H-bridge inverter
computer simulation
space vector pulse width mondulatin （SVPWM）
