三相VSR运行特性研究

摘要

In order to study the performance of three-phase VSR,three-phase PWM rectifier control system based on TMS28346 is designed.For convenience of control,two-phase rotate reference frame is constituted and also vector control technology is introduced.A control strategy using inner current loop and outer voltage loop is proposed to realize DC voltage control and independent control.Four typical running modes of three-phase VSR is analyzed,the relationships among modulation ratio,DC bus voltage,AC voltage and inductance parameters are indicated,the experiment is carried out to demonstrate the correctness of analysis and provide basis for practical application of three-phase VSR.%为研究三相电压源整流器( VSR)运行特性,设计基于TMS28346的三相PWM整流器系统.为便于控制,建立了两相旋转坐标系统,引入矢量控制技术.为实现直流侧电压稳定控制及有功、无功解耦控制,采用电压外环和电流内环控制策略.对三相VSR的4种典型运行模式进行分析,指出调制比与直流母线电压、交流电压及电感参数的相互关系,通过实验论证了分析的正确性,为三相VSR的实际应用和参数设计提供了依据.