基于时间方法的电压源逆变器死区补偿研究  

Research of dead-time compensation for VSI based on a time method

作　　者：闫博 王家军[1] YAN Bo;WANG Jiajun(School of Automation,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学自动化学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2021年第3期43-50,共8页Journal of Hangzhou Dianzi University：Natural Sciences

基　　金：国家自然科学基金资助项目(61873079),浙江省重点研发资助项目(2021C03034)。

摘　　要：死区时间可以有效避免逆变器桥臂发生直通,但也会造成三相电压源逆变器(Voltage Source Inverter,VSI)的输出电压和电流发生畸变,产生误差。为了改善死区效应带来的不利影响,提出一种基于时间的死区补偿方法。分别在理想和实际条件下,推导出空间矢量脉宽调制(Space Vector Pulse Width Modulation,SVPWM)算法中有效电压矢量作用时间的表达式。分析2种情况之间的时间误差,通过补偿时间误差达到死区补偿的目的。补偿前后的仿真实验表明,提出的补偿方法可以有效改善电流波形畸变,提高系统控制性能。The dead-time can effectively avoid the shoot-through of the inverter arms,but it can cause the output voltage,current distortion and error of the three-phase voltage source inverter(VSI).In order to improve the negative effects of dead-time,a dead-time compensation method based on time is proposed.The action time expressions of effective voltage vector in Space Vector Pulse Width Modulation(SVPWM)algorithm are derived,under ideal and practical conditions,respectively.The time error between the two cases is analyzed,and the dead-time compensation is achieved by compensating the time error.Simulation experiments before and after compensation show that the proposed compensation method can effectively improve the current waveform and control performance of the system.

关 键 词：空间矢量脉宽调制 电压源逆变器 死区效应 死区补偿 

分 类 号：TM464[电气工程—电器]