拉伸αβ坐标系下的多电平变流器零序电压优化控制算法

发布时间：2019-01-06 13:48

【摘要】：为降低机电类负载共模电压,对多电平变流器零序电压优化控制算法进行了研究。首先,采用了一种将经典αβ坐标系中的α和β坐标值分别拉伸为原值的3和3倍的新型mn坐标系,推导了多电平空间矢量脉宽调制(SVPWM)在这种新型坐标系中的实现方法;其次,根据引入的零序电压约束条件,推导了多电平电路输出状态。实验结果表明,在mn坐标系中,所有基本矢量的坐标为整数,零序电压优化控制算法能确保零序电压的值在-E/3、0和E/3之间来回切换(E为单级电平),且该算法与多电平的电平数无关。
[Abstract]:In order to reduce the common mode voltage of electromechanical load, the zero sequence voltage optimal control algorithm of multilevel converter is studied. Firstly, a new type of mn coordinate system is adopted, in which the 伪 and 尾 coordinate values in the classical 伪尾 coordinate system are stretched to 3 and 3 times the original value, respectively, and the realization method of multilevel space vector pulse width modulation (SVPWM) in this new coordinate system is deduced. Secondly, the output state of multilevel circuit is deduced according to the zero sequence voltage constraint. The experimental results show that in the mn coordinate system, the coordinates of all basic vectors are integers, and the zero sequence voltage optimization control algorithm can ensure that the zero sequence voltage is switched back and forth between -E / 3 0 and E / 3 (E is a single level). The algorithm is independent of the number of multilevel levels.
【作者单位】：广东工业大学自动化学院;
【基金】：国家自然科学基金(51207026;51307025) 广东省自然科学基金(2015A030313487)~~
【分类号】：TM46

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