适用于中点钳位H桥五电平逆变器的快速SVPWM算法  

Fast space vector pulse width modulation algorithm for neutral point clamped H-bridge five-level inverter

作　　者：吴宇涛 贾何飞 邓焰[1] WU Yu-tao;JIA He-fei;DENG Yan(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电机与控制学报》2022年第11期31-38,共8页Electric Machines and Control

摘　　要：针对传统多电平空间矢量脉宽调制技术(SVPWM)计算量大的问题,提出一种适用于中点钳位(NPC)H桥五电平逆变器的快速SVPWM算法。首先分析了传统五电平SVPWM算法复杂度高的本质原因。在分析五电平空间矢量图的基础上,提出了一种新型扇区分割方案,将五电平空间矢量图等效为4个两电平空间矢量图的组合。相较于传统五电平SVPWM算法,新算法应用两电平SVPWM的方法完成运算,从而大幅降低了在参考矢量位置判断和基本矢量作用时间计算部分的计算量。最后搭建了三相NPC/H桥型五电平逆变器原理样机,实验结果表明,新算法的程序运行时间仅为传统算法的55.27%,且输出电压效果保持了与传统算法相同的优越性。While the conventional multi-level space vector pulse width modulation(SVPWM)algorithm has a large amount of calculation,a fast SVPWM algorithm suit for neutral point clamped H-bridge inverter was proposed.The essential reason that the conventional 5-level algorithm is of great complexity was analyzed firstly.A novel sector dividing scheme was derived by analyzing the 5-level space vector diagram.The 5-level space vector diagram is equivalent to the combination of 42-level space vector diagrams for the scheme.In contrast with the traditional 5-level SVPWM algorithm,in the new algorithm the two-level SVPWM method was used to complete the operation,and calculations for locating the reference vector and getting the duty ratios of the basic vectors dramatically decreased.Finally,a prototype of the three-phase neutral point clamped H-bridge 5-level inverter was built.Experimental results indicate that the output voltages from the new algorithm are identical with the conventional one,while calculation time of the new algorithm is just 55.27% of the conventional one.

关 键 词：中点钳位H桥五电平逆变器 空间矢量调制 空间矢量图 扇区分割 程序耗时 快速算法 

分 类 号：TM464[电气工程—电器]