Elimination of Circulating Current in a Parallel PWM Rectifier Using an Interface Circuit

Parallel pulsewidth modulation rectifiers are a good solution for high-power ac-dc applications, which enhance quality and reliability. However, the main and inevitable shortcoming of parallel structures is a generation of circulating current. Various methods are proposed to reduce or eliminate circ...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2022-01, Vol.37 (1), p.264-273
Main Authors: Porkia, Hadi A, Adabi, Jafar, Zare, Firuz
Format: Article
Language:English
Subjects:
Circuits
Circulating current
Converters
Dynamic response
Inductors
interfacing circuit
Legged locomotion
modular
parallel pulsewidth modulation (PWM) rectifiers (PPWMRs)
Power harmonic filters
Pulse duration modulation
Pulse width modulation
Rectifiers
Switches
Switching
Switching circuits
switching pattern
Waveforms
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Summary:Parallel pulsewidth modulation rectifiers are a good solution for high-power ac-dc applications, which enhance quality and reliability. However, the main and inevitable shortcoming of parallel structures is a generation of circulating current. Various methods are proposed to reduce or eliminate circulating current, most of which tend to change or limit the switching pattern of parallel converters. This article presents an interfacing circuit with low rating elements, which eliminates the circulating current without any limitation for the switching pattern of parallel converters. Therefore, voltage and current waveforms are in high quality. Moreover, unlike previous methods that had complex control and high mathematical computations, the presented method has simple control. Therefore, multiple modules can be implemented in a modular fashion with a fast dynamic response. Simulation and Laboratory results are presented to validate the analysis.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2021.3099743