摘要
对基于单周控制的三相四线制PWM整流器的工作原理和控制规律进行了全面分析。建立了三相四线制PWM整流器数学模型,在讨论单周控制原理的基础上,推导了实现单位功率因数所需的单周控制方程,对关键的电压平衡控制问题进行了重点分析,仿真结果表明该PWM整流器可以实现单位功率因数校正和低电流畸变,直流侧总输出电压稳定,且通过运用电压平衡控制方法可以实现两输出电容电压平衡。
A three-phase four-wire PWM rectifier controlled by one-cycle controller was fully analyzed. The average equivalent model of three-phase four-wire PWM rectifier was built. Based on discussion of the principle of one-cycle control, the one-cycle control equation was derived to realize unity power factor. The voltage balancing control strategy was explained in detail. The simulation results show that this PWM rectifier can realize the unity power factor correction, lower current distortion, output stable DC side voltage and balance the two output capacitor voltages.
出处
《电源技术》
CAS
CSCD
北大核心
2011年第12期1576-1579,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金(50907076)
关键词
单周控制
三相四线制
PWM整流器
电压平衡控制
one-cycle control
three-phase four-wire
PWM rectifier
voltage balancing control
