Abstract
In this paper, the Author presents the theory and application of repetitive proportional integral current con-troller for boost single phase ac-dc converter with power factor correction (PFC). A repetitive controller which is inserted in series with the proportional integral ( PI) controller shows very low crossover distortion of input current, low total harmonic distortion and very low tracking error when is compared with the con-ventional proportional integral controller. Full analysis of proposed controller is given and Matlab/Simulink is used for simulation. The simulation results show the validity of the proposed control method.
Highlights
The developments in power factor correction technology in the past two decades have enabled the design and implementation of single phase ac-dc boost converters with close to unity power factor and much less input current distortion that generated by simple diode rectification circuits.Typical PFC schemes use two cascaded loops: the first loop aims to regulate the boost dc output voltage and provide the amplitude for the reference to the second controller, which controls sinusoidal current provided from grid
A repetitive controller which is inserted in series with the proportional integral (PI) controller shows very low crossover distortion of input current, low total harmonic distortion and very low tracking error when is compared with the conventional proportional integral controller
Simulation is performed by Matlab/Simulink to verify the proposed PFC boost converter with repetitive controller
Summary
The developments in power factor correction technology in the past two decades have enabled the design and implementation of single phase ac-dc boost converters with close to unity power factor and much less input current distortion that generated by simple diode rectification circuits. Typical PFC schemes use two cascaded loops: the first loop aims to regulate the boost dc output voltage and provide the amplitude for the reference to the second controller, which controls sinusoidal current provided from grid. This current always contains some residual distortion, especially in the vicinity of zero crossing of the input voltage. A repetitive controller is proposed and designed to eliminate the zero crossing distortion of input current of the converter and to obtain good tracking performance.
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