Power and Energy Engineering

Three phase controlled rectifiers are the most commonly used converter type among power electronics converters. Their total harmonic distortion of the input current (THDi) is very high. Decreasing THDi value is very important to comply with IEEE-519 standards and IEC-61000-3-2, and for power quality issues. This paper deals with a high power thyristor rectifier with low harmonics and high power factor. In this study, harmonic mitigation techniques for thyristor rectifiers are investigated. Furthermore, a thyristor rectifier which comply with IEEE-519 standards and IEC-6100-3-2 is proposed. The proposed system is evaluated according to input current total harmonic distortion, the input power factor and, line voltage unbalance sensitivity. The reduction in the input current harmonics is verified by simulation results.