Zanco Journal of Pure and Applied Sciences (Oct 2020)
Power Quality Measures of Non-Ideal 3-phase Diode Rectifiers and Smoothing Circuits
Abstract
The study of the rectifier LC smooth circuit to minimize the total harmonic distortion (THD) of three phase of non-ideal diode rectifier has been proposed. The input line current has a non- sinusoidal shape and contains harmonic, which has a negative effect on the input power quality and it makes much stress on the load. According to the International Electrotechnical Commission (IEC61000) standards, variety harmonic limitations are defined to be regulated. In this paper, the cost effective solutions such as changing different parameters including load resistance, DC capacitance and inductance and input AC inductance, on the rectifier performance in terms of V load mean, ripple, diode and Capacitor RMS current, fundamental current and considering relevant harmonics up to 1 kHz and the load side voltage (mean value and ripple) have been investigated to find a best way to reduce ripple voltage stress and harmonics. It has been founded that the best way to obtain high mean and fewer ripple is increasing the DC-link Inductance. The major purpose here is to reduce the Total Harmonic Distortion (THD) of the line current under different load conditions (from 61.33% to 26.87%).
