三相单位功率因数PWM整流器的研究

Study of Three Phase Unity Power Factor PWM Rectifier

随着电力电子技术的迅速发展,谐波污染问题越来越不容忽视。电压型PWM整流器(Voltage Source Rectifier,简称VSR)因功率因数近似为1,并能减少电流谐波,实现能量的双向流动而备受关注。首先给出了VSR的拓扑结构和数学模型,然后论述了空间矢量控制方法在VSR中的应用。仿真结果表明了空间矢量控制策略在实现单位功率因数方面的有效性,最后根据实际应用中存在的“死区”问题,研究了基于DSP及CPLD的实现方法。

With the rapid development of the power electronic technology,the problem about harmonics pollution has been more and more regarded.Voltage Source Rectifier（VSR） has been paid more and more attention,because of its power factor approximating to unity,the capability of decreasing the current harmonics,and realizing the double direction flow of the power.At first the topology and the mathematical model of VSR are presented,and then the application of the SVPWM control strategy in VSR is described.The simulative results show the space vector control strategy is effective in the field of realizing the unity power factor.At last,the dead time＇s realization based on DSP and CPLD are studied.