Comparative Research on Three-Phase PWM Rectifier Based on Variable-Frequency Hysteresis and Space-Vector Current Control Strategy
In view of the common shortcomings of conventional hysteresis controlling method,this paper proposes a new control strategy for three-phase PWM rectifier,which combines variable-frequency hysteresis current control with space-vector control.The system mathematical model,control mechnism,major principles and implementation process are elaborated.On Matlab/Simulink software platform,a simulation model for the system was established,and the comparation with the traditional current hysteresis and unipolar PWM control method has verified that the variable-frequency hysteresis and space-vector control method can realize unit power factor running,reduce the harmonic pollution,lower switching frequency,accelerate dynamic response and so on,providing a new method for PWM rectifier control.This method is effective in improving the system efficiency and valuable in application.
NETL
NSTL
万方数据
维普
