Comparison of power quality indices and apparent power (kVA) ratings in different autotransformer-based 30-pulse AC–DC converters

Abstract

Three-phase multipulse AC-DC converters (MPC) are developed for improving power quality to reduce harmonics in ac mains and ripples in dc output. This study, based on technical and economic factors, compares different autotransformer-based 30-pulse AC-DC converters. In this paper, the comparison of two topologies of autotransformer-based 30-pulse AC-DC converter has been presented. In topology A, three-phase AC voltages are given to the autotransformer, which produces five sets of three-phase voltage and, in topology B, three-phase AC voltages are given to the autotransformer, which produces three sets of five-phase voltages of same magnitude and distributed in time through phase shifts of 12 •. Topology A included polygon, hexagon, star, fork, and T-connected autotransformer-based 30-pulse AC-DC converters, and topology B Included polygon, and T-connected autotransformer-based 30-pulse AC-DC converters. These converters have been implemented and simulation using Matlab/Simulink software for similar ratings under different load conditions has been performed. A set of power-quality indices on input ac mains and on a dc bus for a DTCIMD fed from different 30-pulse AC-DC converters is given to compare their performance. Economic comparison of 30 pulse AC-DC converters is based on the apparent power (kVA) ratings of the different autotransformer for 30 pulse AC-DC converters.

A 40-Pulse Autotransformer Rectifier Based on New Pulse Multiplication Circuit for Aviation Application

“…In the second group, the pulse number is increased by increasing the number of output phases of the phase-shifting transformer. This method has been used to obtain 12 [4][5], 18 [6], 20 [7][8], 24 [9], 30 [10], 36 [11], and 44 [12] pulse rectifiers (PRs). However, by increasing the pulse number, the windings of the transformer and the components used in the rectifier will be increased, which results in a complicated structure and increased costs.…”

A low‐rating 40‐pulse AC–DC rectifier based on a new passive harmonic mitigation circuit

“…In the second group, the number of output phases of a phase‐shifting transformer is increased to increase the number of pulses. This method has been used to obtain 12 [3, 4], 18 [5], 20 [6, 7], 24 [8], 30 [9], 36 [10], and 44 [11] pulse rectifiers (PRs). However, the pulse number increase results in an increase in the number of transformer windings and the components.…”

Optimal Model Predictive based on Super-Twisting Fractional Order Sliding Mode Control to Regulate DC-link Voltage of DC Microgrid

“…These devices are extensively used in the electrical circuit of Renewable Energy Sources (RES), whereas DC microgrid is one of these applications [7,8]. Apart from them, AC-DC converters have successfully found their roles in many industrial applications such as Power-Electronic Drives (PEDs), Power Quality Compensators (PQCs), Active Power Filters (APFs) and so forth [9][10][11]. AC-DC converters can be generally categorized into controllable and uncontrollable types.…”