A Parameter Designing Method of PWM Voltage Source Rectifier

Abstract

This paper describes a method of determining parameters of PWM rectifiers based on the degrees of total harmonic distortion (THD). The inductance value of AC reactors and capacitance value of DC capacitor give a great influence on the amplitude of the harmonics in the AC input currents and DC output voltage, respectively. So far simulation-based harmonic analysis is dominant. In this paper we propose the harmonic distortion determining factor that provides a simpler and broader manner of obtaining THD values, that is, it enables us to calculate approximate THD values without conducting any simulations or experiments. Finally experiment using a DSP is carried out to confirm the usefulness. An optimal regulator theory is applied to the controller design.