Studies On Simulation Of PWM Rectifier System Based On The Voltage Oriented Control

Because of the un-controlled device, traditional rectifier has some shortcomings, such as low AC side power factor, large current harmonics and un-revisable power flow. The PWM rectifier can actively eliminate AC side harmonics pollution of rectifier and increase AC side power factor.To ensure proper operation and optimization of the high-power PWM rectifier systems, the simulation of systems can be performed. The purpose of this thesis is to build the Simulink model of three-phase Voltage Source Rectifier (VSR), which can be use in off-line simulation or real-time simulation. It is very important and significant to design and develop the high-power PWM rectifier system.Based on analyzing the three-phase VAR work principle, the mathematical model of VSR is educed; the block diagram of double closed-loop controlled system for three-phase VSR can be obtained. Based the block diagram, calculating parameter method of current regulator and voltage regulator can be educed. By the method of voltage oriented control, the AC-side current can be transformation into DC current in d axis and q axis. This can simplify the design of PWM rectifier controller. Based on the above studies, the Simulink based model of three-phase VSR is obtained by using switching function concept which able to model converter circuits according to its input and output transfer functions, rather than the circuit topologies. The Simulink models of the voltage oriented control, voltage controller, current controller, rectifier and PWM...