Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/141558
Title: Circulating currents suppression for IPOP nonisolated dc/dc converters based on modified topologies
Authors: Xia, Yanghong
Yu, Miao
Peng, Yonggang
Lin, Pengfeng
Shi, Donghang
Wei, Wei
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2018
Source: Xia, Y., Yu, M., Peng, Y., Lin, P., Shi, D., & Wei, W. (2019). Circulating currents suppression for IPOP nonisolated dc/dc converters based on modified topologies. IEEE Transactions on Power Electronics, 34(2), 1901-1913. doi:10.1109/TPEL.2018.2832295
Journal: IEEE Transactions on Power Electronics
Abstract: Nonisolated dc/dc converters are widely used in practice because of their low losses and high power density. To accommodate some high-power scenarios and modular applications, these nonisolated converters are usually connected in the input-parallel output-parallel (IPOP) structure. Because there is no galvanic isolation, the ac side and dc side are coupled together, which causes complicated circulating currents in the system. The great circulating currents will endanger the stable and reliable operation of the IPOP nonisolated dc/dc converters system. Focusing on this problem, this paper proposes a novel decentralized circulating currents suppression strategy for IPOP nonisolated dc/dc converters based on the modified topologies, which can still hold the main advantages of nonisolated solutions. First, the complicated circulating currents among the IPOP nonisolated dc/dc converters are analyzed in detail. It is found that various circulating currents exist in the system including the circulating currents within the single converter and the circulating currents among the multiple converters. Then, the limitations of the conventional dc/dc converter topologies are presented and it is proved that these topologies cannot eliminate all the circulating currents. Second, being inspired by the drawbacks of the conventional topologies, the modified topologies with two degrees of freedom modulation are designed. Based on the modified topologies, a corresponding suppression method consisting of two degrees of freedom control is proposed, which can eliminate the different types of circulating currents in a decoupling way. The first degree of freedom control mainly suppresses the circulating currents within the single converter, whereas the droop-based second degree of freedom control mainly suppresses the circulating currents among the multiple converters. Through the proposed solution, the IPOP nonisolated dc/dc converters can operate well with high reliability and scalability. The effectiveness of the proposed solution is validated by the real-time hardware-in-loop tests.
URI: https://hdl.handle.net/10356/141558
ISSN: 0885-8993
DOI: 10.1109/TPEL.2018.2832295
Rights: © 2018 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles

SCOPUSTM   
Citations 50

1
Updated on Mar 2, 2021

PublonsTM
Citations 20

1
Updated on Mar 5, 2021

Page view(s)

122
Updated on May 18, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.