Research And Design On The Three Phase Voltage Source PWM Rectifier

Along with the development of technology, the requirements of the power electronicequipment is higher and higher, especially in inhibit its pollution to the grid. Three-phasePWM rectifier input current is sinusoidal, achieve unity power factor and low harmoniccontent, in line with the direction of the development of green energy, has been widely studiedand applied.Three-phase PWM rectifier is a strong coupling, time-varying nonlinear system, controlis more complicated. This paper introduces the three-phase PWM converter topologystructure, and according to the voltage type rectifier introduces the mathematical modeling ofswitch to two phase rotation coordinate system model, and research on the control strategy,and set up the experiment and simulation platform,give the result.First, introduce the basic working principle of the voltage source PWM rectifier, andestablish the mathematical model of the ABC three-phase static coordinate system andtransform to dq synchronization reference frame. Based on the dq model, A detailed analysisof the control method, and detailed introduces the method of space vector modulation method,and finally and ultimately to take the voltage loop sliding mode control strategy, the innercurrent loop to take the feedforward decoupling control strategy, and built the Matlabsimulation model, verified the feasibility and advantage of the control method.Second, according to a given technology parameter, give the design of hardware andsoftware of the system. Hardware, this paper introduces the design method of the inductanceand capacitance of the main circuit, and the selection of power tube. And also given thepreliminary analysis method on the loss of the main circuit, in order to grasp on the efficiency;Similarly, detailed descriptions of the peripheral sampling and protection circuit, controlcircuit design; software, given the design of the software based on TI’s TMF320F2812-controlcore.Finally, the paper with resistance load and nonlinear load of the experimental results, andcompared with expectations, draw the conclusion.