摘要
介绍一种三相PWM整流器的幅相控制方法,通过实时检测功率因数角和直流母线电压,来控制整流器输入端电压相对于三相电源电压的滞后角及调制深度,并将该算法进行线性化处理,实现解耦控制和单位功率因数运行.分析了系统稳定工作时参数的变化范围、约束条件及负载扰动时系统的调节过程,并对三相PWM整流器进行了谐波分析.本控制策略算法简单易行,并得到了实验验证.
A three-phase PWM rectifier controlled by phase and amplitude is presented. The lagging phase angle θ between supply voltage and input voltage of rectifier and modulation are controlled with real-time detection of power factor angle and DC bus voltage. The algorithm is linearized, and deeoupling control is implemeted to achieve unity power factor. The range of parameters, eonstraint conditions, and adjustment process of system are analyzed under load disturbance. Harmonic of the three-phase PWM rectifier is also analyzed. The control algorithm is Simple, and easy to implement, and verified by experiments.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第2期130-135,共6页
Journal of Shanghai University:Natural Science Edition
基金
教育部博士点基金资助项目(20060280018)
上海市教委重点基金资助项目(06ZZ03)
台达电力电子科教发展基金资助项目(DRE02006017)
上海市重点学科建设资助项目(T0103)
关键词
PWM整流器
幅相控制
谐波分析
单位功率因数
解耦控制
PWM converters
phase and amplitude
harmonic analysis
unity power factor
deeoupling control
