串联H桥多电平变频器电压空间矢量控制算法  

Voltage space vector control algorithm for cascaded H-bridge multi-level inverters

作　　者：卫三民[1] 孙旭东[1] 刘丛伟[1] 李发海[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2003年第3期366-368,372,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：为解决串联H桥多电平变频器调速系统中,由于电压矢量数目过多而带来的计算困难及电压矢量优化选择问题,在对多电平系统电压矢量的特点和规律进行深入分析的基础上,提出了一种简单、通用的电压空间矢量控制算法。该算法采用以线电压作为中间值的方法对输出电压矢量及其作用时间进行计算,采用大小开关状态相结合的方法对脉冲宽度调制(PWM)脉冲进行输出。该方法同时具有需要定时器数目少,占用内存少和实现简单的特点。实验结果表明该控制算法是正确和有效的。A cascaded Hbridge multilevel inverters with vector control has a large number of voltage vectors, which makes selection and optimization of its voltage space vectors difficult. A general voltage space vector pulse width modulation (PWM) control algorithm was developed by analyzing the characteristics of the voltage vectors. In the algorithm, the line voltages are introduced as the intermediate elements to calculate the voltage vectors and their operating time in a control cycle, with a new PWM pattern used to generate the pulses by alternatively selecting large and small voltage vectors. The algorithm needs few timers, small CPU memory, and is simple to apply. Experimental results have verified the algorithm effectiveness.

关 键 词：串联H桥 多电平变频器 电压空间矢量 脉冲宽度调制(PWM) 控制算法 

分 类 号：TM921.2[电气工程—电力电子与电力传动]