T型三电平拓扑的PWM控制策略  

PWM Control Strategy of T-type Three-level Topology

作　　者：郑诗程[1] 彭勃[1] 徐礼萍[1] 

机构地区：[1]安徽工业大学电气与信息工程学院,马鞍山243032

出　　处：《电力系统及其自动化学报》2016年第2期93-97,共5页Proceedings of the CSU-EPSA

基　　金：安徽省工业节电与电能质量控制协同创新中心开放课题基金资助(KFKT201407)

摘　　要：对T型三电平逆变器的拓扑结构进行了分析研究,提出一种T型三电平逆变器PWM控制方法。该方法针对T型三电平拓扑结构,根据负载电流的极性,对零电平时的开关状态进行相应的控制,实现对输出参考电压矢量的合成。分析了该拓扑结构的死区特点及影响,常规的PWM控制方法加入死区后,相电压会出现4种不同的电压畸变,应用文中提出的控制方法,使原本复杂的4种电压畸变情况简化为2种,并提出了具体的死区补偿策略,有效补偿了输出电压的畸变。仿真结果验证了控制方法的可行性与有效性。The T-type three-level inverter topology is analyzed in this paper,and a three-level inverter PWM con-trol method based on the topology is presented. The method controls the switch state of the zero level according to the po-larity of the load current to realize the synthesis of output reference voltage vector. The characteristics and effects of thedead-time is analyzed. Conventional PWM control method with dead-time will cause four different kinds of phase volt-age distortion,but the application of control method presented make the complex voltage distortion more simple withtwo kinds of situations. The strategy of dead-time compensation is attained which reduces the output voltage distortioneffectively. The results of simulation verify the feasibility and effectiveness of the control method.

关 键 词：T型三电平 拓扑 空间矢量调制 死区补偿 电力电子 

分 类 号：TM464[电气工程—电器]