摘要
在研究三电平电压空间矢量SVPWM调制算法与三电平载波SPWM调制算法的基础上,分析出两者之间的本质联系,即基于零序电压分量注入的三电平载波脉宽调制可以等效为三电平电压空间矢量调制,且零序分量是随小矢量时间分配因子的变化而变化。提出一种基于两电平零序注入脉宽调制算法扩展的三电平零序注入脉宽调制算法,并分析其内在联系,避免了每个扇区都要计算零序电压的繁琐,且该优化算法更加易于实现。实验结果验证了该优化算法的优越性。
Based on analysis of three - level SVPWM modulation and SPWM modulation,the nature relation was given--the zero-sequence voltage component injected carrier modulation can be equivalent to a three-level SVPWM, and the zero-sequence components changes when time allocation factor of small vectors changes.A new method of the three- level modulation was presented based on the two-level zero- sequence injected modulation, and analyzed the internal connection. Avoid the trouble to calculate the zero-sequence component of every sector. And the optimization algorithm is more easy to implement. Experimental results demonstrate the superiority of the optimization algorithm.
出处
《电气传动》
北大核心
2013年第2期48-51,共4页
Electric Drive
关键词
零序注入法
载波调制
电压空间矢量
三电平逆变器
zero-sequence injection
carrier modulation
voltage space vector
three-level inverter
