一种改进虚拟合成矢量的三电平DTC方法  

Development of the Virtual Synthesizing Vectors of Three-level DTC System

作　　者：杨新华[1] 宗圣旗[1] 马建立[2] 赵丽峰[1] 周仁伟[1] 裴宏涛[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]北京京仪椿树整流器有限责任公司,北京100040

出　　处：《电气传动》2009年第4期30-34,共5页Electric Drive

基　　金：甘肃省教育厅科技项目计划资助(0703B.08)

摘　　要：在分析合成矢量法的基础上,提出了一种改进的虚拟合成矢量的三电平逆变器直接转矩控制方法,不但能够有效抑制输出电压的跳变、减少转矩脉动,而且能有效地实时控制三电平逆变器的中点电压。该方法实现简单,经仿真证明,能够较好地解决电压跳变以及降低转矩脉动问题,同时中点电压亦得到很好的实时控制。A development of virtual synthesizing vectors of three-level inverter DTC system was developed based on the concept of synthesizing vectors which can not only completely restrain the high dw/dt oi output voltage and reduce the torque ripple problems, but also solve the unbalance of neutral point of the three-level inverter timely. Simulation and theory analysis verifies that the algorithm is very simple to be carried out ,out- put higher dv/dr and torque ripple problems are solved well, neutral-point potential can be under good control as well.

关 键 词：三电平逆变器 虚拟合成矢量 中点电压 直接转矩控制 

分 类 号：TM571[电气工程—电器]