NDLI: Unbalanced current analysis of three-phase AC–DC converter with power factor correction function based on integrated transformer

Content Provider	IET Digital Library
Author	Li, Chunjie Xia, Zhenglong Li, Fei Chen, Xinyu Li, Hongmei Liu, Zhan Wang, Guifeng
Abstract	Three-phase AC–DC converter based on integrated transformer is a novel converter which is capable of handling high power levels and can realise power factor correction function. Owing to different parameter tolerances of the primary windings, grid current could be unbalanced, which usually could not be solved through traditional control methods. To handle this problem, a current balancing method is adopted in this study to improve former current control loop. Meanwhile, based on the principle of instantaneous power balance, a dual loop control strategy with an outer voltage loop and an inner current loop is designed. Besides, load current feedforward control is introduced to enhance the dynamic response. Moreover, phase-shift control is employed as the modulation method, in which duty ratios change along with sinusoidal signals. Simulation and experimental results show that the control strategy could make the three-phase current of the converter sinusoidal and balanced.
Starting Page	2461
Ending Page	2468
Page Count	8
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 12, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.1415
Journal	IET Power Electronics
Publisher Date	2020-05-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	AC-DC Power Converter Control of Electric Power System Current Balancing Method Current Control Current Control Loop Current Feedforward Control DC-DC Power Converter Different Parameter Tolerances Dual Loop Control Strategy Dynamic Response Electric Current Control Feedforward Grid Current High Power Levels Inner Current Loop Instantaneous Power Balance Integrated Transformer Outer Voltage Loop Phase-shift Control Power Converter Power Factor Correction Power Factor Correction Function Power Supplies to Apparatus Three-phase AC-DC Converter Three-phase Current Traditional Control Method Unbalanced Current Analysis Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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