基于改进的虚拟合成矢量法异步电机三电平矢量控制仿真研究  

Research on Asynchronous Motor underThree-Level Vector Control Based on Technique of Improved Virtual Synthesizing Vectors

作　　者：周仁伟[1,2] 杨新华[2] 宗圣旗[2] 赵丽峰[2] 马建立[3] 

机构地区：[1]许继电气股份有限公司直流输电系统公司,许昌461000 [2]兰州理工大学电气工程与信息工程学院,兰州730050 [3]北京京仪椿树整流器有限责任公司,北京100040

出　　处：《大电机技术》2010年第3期35-39,共5页Large Electric Machine and Hydraulic Turbine

基　　金：甘肃省教育厅科技项目计划资助(0703B-08)

摘　　要：三电平逆变器中直流侧中点电容电压平衡和过高的电压跳变问题直接影响着逆变器及其电机调速系统的可靠性。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脉宽调制控制方法,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,经仿真验证能够较好地解决电压跳变以及转矩脉动问题,同时中点电压亦得到很好的实时控制。The neutral point potential balance and high dv/dt of the output voltage are two of the key aspects that affect the realiability of a three-level inverter and its speed-adjusting system.An improved technique of virtual synthesizing vectors is developed based on the concept of virtual synthesizing vectors which can not only completely restrain the high dv/dt of 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,higher dv/dt and torque ripple problems are solved well,neutral-point potential can be under good control as well.

关 键 词：三电平 虚拟合成矢量 中点电压 

分 类 号：TM343[电气工程—电机]