基于电压定向控制的三相PWM整流器设计

The Design of Three-phase PWM Rectifier Based on Voltage Oriented Control

针对电网侧易产生的谐波污染和低功率因素问题,设计了一种运行于单位功率因数的PWM整流器控制系统。首先对三相PWM整流器的拓扑结构进行了简要介绍,并列出了其对应的数学模型。然后利用坐标变换得到基于电压外环、电流内环的双闭环控制策略,并设计了相应的控制参数。最后通过Matlab/Simulink仿真软件进行了仿真分析。仿真结果表明,所设计的系统能够运行于高功率因素,且具有较好的动态响应能力。

In order to solve the problems of harmonic pollution and low power factor on the grid side,a PWM rectifier control system which operating in unit power factor is designed.Firstly,the topology of three-phase PWM rectifier is briefly introduced,and its corresponding mathematical model is listed.Then the double closed-loop control strategy based on voltage outer loop and current inner loop is obtained by coordinate transformation,and the corresponding control system is designed.Finally,the simulation is carried out by the simulation software of MATLAB/Simulink.The simulation results show that the designed system can operate in high power factor and has good dynamic response capability.