A High Power Thyristor Rectifier with Low Harmonics and High Power Factor

Abstract

Three-phase thyristor rectifiers are widely used in industrial applications. The harmonic content of the input current in this converter is very high. Decreasing total harmonic distortion of the input current is very important to comply with IEEE-519 standards and IEC- 61000-3-2, and for energy quality issues; therefore, a harmonic reduction technique is needed to solve the problem. This paper presents an adaptive filter for high power thyristor rectifiers. The proposed filter can provide compensation for reactive power in a wide range from 25% to 100% load with low input current harmonics. The most suitable design has been selected in terms of performance, reliability, ease of control and low cost. Simulation for the proposed harmonic reduction scheme has been performed by using the PSIM simulation program.

Keywords: current harmonics, energy quality, harmonic reduction, power factor correction, total harmonic distortion, thyristor rectifiers

DOI: 10.7176/JSTR/5-2-14