多电平逆变器三段法空间矢量脉宽调制算法设计  

Design of three-segment SVPWM algorithm for multilevel inverter

作　　者：郑宏[1] 邝文明[1] 赵伟[1] 孙玉坤[1] 

机构地区：[1]江苏大学电气信息工程学院,镇江212013

出　　处：《农业工程学报》2012年第21期170-176,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：江苏高校优势学科建设工程资助项目;国家自然科学基金项目(61074019)

摘　　要：为解决传统七段法空间矢量脉宽调制(SVPWM)在高电平电力逆变器中应用受限的问题,该文提出了一种优化开关系统算法,即三段法SVPWM算法。优化算法采用了一种新型三角形划分法和60°坐标系。分析了附加开关的产生原因、最小化机理,详细表述了三段法开关序列的设计步骤并辅以实例。与传统七段法相比,三段法开关序列设计灵活,可最小化器件开关频率,降低开关损耗。在五电平级联型逆变器上对该调制策略进行了仿真研究,结果验证了该法的有效性和优越性。A novel optimal switching systems algorithm, referred to as 3-segment space vector pulse width modulation （SVPWM）, was developed to solve the problem that the traditional 7-segment SVPWM is limited largely in high-level electric inverters application. The optimal algorithm adopts a novel triangular dividing method and 60°coordinate system. The cause and minimization principle of additional switching were analyzed. The design steps of 3-segment switching sequence were given detailedly with some examples. In contrast to that of 7-segment SVPWM, the switching sequence design of the proposed 3-segment SVPWM is more flexible, and it could minimize the switching frequency, decreasing switching loss. The proposed modulation strategy was simulated on a 5-level cascaded H-bridge inverter. Simulation results verified its validity and superiority.

关 键 词：电力逆变器 开关系统 开关频率 空间矢量脉宽调制 60°坐标系 

分 类 号：TM464[电气工程—电器]