基于Z源逆变器的改进空间矢量脉宽调制算法研究  

Research on Improved Space Vector Pulse Width Modulation Algorithm Based on Z-Source Inverter

作　　者：薛阳[1] 阚东跃 时宇飞 郑蓉[1] 郑梦秋 张明超 

机构地区：[1]上海电力学院自动化工程学院,上海200090 [2]江苏国艾电气有限公司,江苏盐城224300

出　　处：《电机与控制应用》2016年第9期14-19,共6页Electric machines & control application

基　　金：上海市自然科学基金资助项目(13ZR1417800);国家自然科学基金资助项目(51405286);上海市重点科技攻关计划项目(14110500700);上海市电站自动化技术重点实验室项目(13DZ2273800)

摘　　要：Z源逆变器通过在空间矢量脉宽调制(SVPWM)算法中插入直通零矢量,从而获得独有的升压能力。传统算法首先需要坐标变换来进行扇区判断及时间点计算,存在大量复杂运算,降低了系统时效性。针对这一问题提出改进算法,直接利用三相电压进行扇区判断,并计算扇区内相邻基础矢量及直通零矢量作用时间,从而得到开关次序,无需进行坐标变换。通过仿真,在以DSP为控制核心的Z源逆变器系统中验证了算法的可行性。试验表明,与传统SVPWM算法相比,改进型算法响应速度快,具有较高的系统效率。By inserting shoot-through zero state into space vector pulse width modulation algorithm, a unique ability of voltage increasing could be obtained by Z-source inverter. Since the coordinate transformation, sector determination and point-in-time calculation were needed in the traditional SVPWM algorithm, and as a matter of increasing the time efficiency, the improved algorithm determined the sector by using three-phase voltage directly, and then calculated the effective acting time of resultant vector and shoot-through zero state. Thus, the sequence of switches could be obtained. Further more, the feasibility of the algorithm has been verified by simulating the DSP- controlled Z-source inverter system. And the experiment results also showed the feature of fast response and high efficiency of the improved algorithm compared to traditional SVPWM.

关 键 词：Z源逆变器 空间矢量脉宽调制 扇区 直通零矢量 

分 类 号：TM301.2[电气工程—电机]