一种改进PWM型整流器直接功率控制  

A modified direct power control of PWM rectifiers

作　　者：赵辉[1] 王彪[1] 王红君[1] 岳有军[1] 

机构地区：[1]天津理工大学天津市复杂控制理论与应用重点实验室,天津300384

出　　处：《电源技术》2015年第4期818-821,共4页Chinese Journal of Power Sources

基　　金：天津市自然科学基金(10JCZDJC23100)

摘　　要：主要研究了一种新的基于SVPWM的三相电压型整流器预测直接功率控制。这种预测直接功率控制以虚拟磁链为核心,省去了交流侧电压传感器,同时解决了传统的开关直接功率控制开关频率不固定的缺点,继承了传统直接功率控制无需旋转坐标变换,控制方案简单明确的特点。并且与其他改进方案相比,也不需要加入PI环节或是电压矢量定向环节。通过RT-LAB进行仿真,并与传统的控制方案进行对比,突出新控制方案在改善THD和控制功率波动方面的优越性。A novel predictive direct power control scheme of three-phase voltage rectifier based on SVPWM was presented. The predictive direct power control based on virtual flux can obtain a fixed switch frequency instead of variable switching frequency in conventional look-up table direct power control without AC voltage sensors, and it is stil simple and clear implemented in the stationary reference frame directly. It does not need PI control ers or voltage-oriented control ers compared to other developed control schemes. The simulations using RT-LAB was made. The results show the excellence of the improving the current THD and control ing the power fluctuation of the novel scheme compared to the traditional control schemes.

关 键 词：三相电压型PWM整流器 虚拟磁链 预测直接功率控制 恒定开关频率 RT-LAB 

分 类 号：TM422[电气工程—电器]