Three Phase Rectifier Topology with Practically Sinusoidal Input Currents (original) (raw)

Harmonic reduction in a three-phase rectifier with sinusoidal input current

International Journal of Power and Energy Systems, 2003

This article proposes a new approach to reduce harmonics generated by a three-phase diode rectifier. The proposed approach uses the input filters, six controllable switches, high-frequency isolation transformer, and the three-phase diode rectifier. The switching of the controllable switches is modulated by a novel pulse-width modulation (PWM) implemented in an XC4006 field programmable gate array (FPGA). This approach realizes sinusoidal input current waveforms with low electromagnetic interference and arbitrary output voltage. The output voltage can be controlled by variation of the modulation index in the range (0 ≤ M ≤ 0.98). The experimental results to compare performance between with and without the proposed approach are carried out to confirm its feasibility. http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=1047184&tag=1

Harmonics Analysis of Input Current of 3-Phase PWM Rectifier

Andalas Journal of Electrical and Electronic Engineering Technology, 2021

Rectifier is a non-linier load that causes harmonic distortion in the power system. Pulse-width modulation (PWM) method is an effective method in pressing the magnitude of harmonics in a rectifier application, it provides an almost sinusoidal input current. However, the variation of loads that supplied by a rectifier cause the harmonics that arise can still beyond the applicable standard. The amount of harmonics in the operating range of a rectifier need to be identified to determine the filter on the input side. In this research article, 3-phase PWM rectifier was designed with hysteresis current control technique using PSCAD software simulation. Harmonic compensation was carried out by applying an active filter based on P-Q theory to reduce the harmonic distortion that occurs in the input current, thus giving a low total harmonic distortion (THD) value. Based on the simulation, 3-phase PWM rectifier operation starting at a power level of 150 kW, giving a THD value above 5-10% by t...