双随机调制技术在有源功率因数预调节器中的应用研究  

Application of dual randomized PWM technique in active power factor preregulator

作　　者：王斌[1] 周丹[1] 黄凯[1] 

机构地区：[1]三峡大学电气信息学院,湖北宜昌443002

出　　处：《电力自动化设备》2005年第7期90-92,共3页Electric Power Automation Equipment

摘　　要：高频脉宽调制(PWM)整流技术能够减少单相AC-DC整流装置输入端的谐波电流、提高功率因数,但引起了集中在开关频率及其倍频谐波频谱的离散能量分布特性。随机调制技术能够改善电力电子系统电磁兼容性。针对有源功率因数预调节器高频PWM的开关特性,引入双随机调制技术,完成了该系统的性能仿真研究及其Welch谱估计分析。结果表明,双随机调制技术在保证功率因数预调节器具有较高功率因数的情况下,还减小了该高频整流器对供电系统的干扰,改善了其电磁兼容特性。High,frequency PWM(Pulse Width Modulation) technique reduces the input harmonic cur,rent of single,phase AC-DC rectifier and enhances the power factor,but simultaneously raises the discrete energy distribution of harmonic spectrum at switching frequency and its multiple frequen,cies. Randomized modulation technique can improve the electromagnetic compatibility of power electronic system. The dual randomized modulation technique is introduced to a high power factor preregulator. The system performance is analysed and the power spectrum estimation of the input current is simulated. Results show that,the dual randomized modulation technique lowers the inter,ference of high,frequency rectifier on power supply system and improves its electromagnetic compatibility,as well as ensures the high power factor of power factor preregulator.

关 键 词：功率因数调节器 双随机调制 电磁兼容性/电磁干扰 

分 类 号：TN761[电子电信—电路与系统] TM714.1[电气工程—电力系统及自动化]