Multi-Phase Shifting Autotransformer Based Rectifier

Abstract

In this paper, a thorough analysis is carried out in order to achieve an optimal design of a forty-four pulse rectifier. In this study, a novel Multi-phase Shifting Autotransformer (MPSA) is introduced, discussed, simulated and implemented to forty-four pulse rectifier with acceptable power rates. Accordingly, the main purpose of the paper is focused on the power kVA rating reduction for power quality applications. It provides a more economical solution to achieve harmonic mitigation in electric power systems as compared with other rectifiers. The simulation and experimental results show that the input current THD is less than 3% using the proposed topology. The results indicate a significant reduction in the total cost and volume of the proposed forty-four pulse configuration in comparison with similar configurations. Also, it is shown that the proposed converter rating is about 42% of the DC load power. INDEX TERMS Forty-four pulse rectifier, multi-phase shifting autotransformer (MPSA), total harmonic distortion (THD).

Pulse Tripling Circuit and Twelve Pulse Rectifier Combination for Sinusoidal Input Current

“…Also, the efficiency of the proposed 36-PR is 97.7% under full load. The proposed 36-pulse configuration has been compared with 20-pulse rectifier [11, 14, 19, and 36], 24-pulse rectifier [15], 36-pulse rectifier [33, and 34], 40-pulse rectifier [12, 13, and 20], 44-pulse rectifier [23], and 72-pulse rectifier [21, and 22] in Table 3 in terms of THD, efficiency, number of diodes, magnetic rating, and cost. Following the procedure mentioned in [21 and 22], the cost can be estimated at 4.5 times of kVA rating of a transformer.…”

“…The kVA rating of these rectifiers is more than 40% of the load rating. In [23], a 22-phase polygon autotransformer has been employed with a 44-PR. This configuration demands 44 diodes, and many transformers with high turn ratios.…”

Harmonics mitigation approach by using pulse‐doubling circuit in the AC–DC rectifier

“…In Table 2, the proposed 56-PR is compared with 36-PR, 29 40-PR, 30,31 44-PR, 35 and 72-PR. 33,34 It should be emphasized that the total cost and size of the system are determined by the transformer magnetic rating.…”

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.…”