Ultrahigh step-up DC-DC converter for distributed generation by three degrees of freedom (3DoF) approach
Hu, Yihua and Wu, Jiande and Cao, Wenping and Xiao, Weidong and Li, Peng and Finney, Stephen J. and Li, Yuan (2016) Ultrahigh step-up DC-DC converter for distributed generation by three degrees of freedom (3DoF) approach. IEEE Transactions on Power Electronics, 31 (7). pp. 4930-4941. ISSN 0885-8993 (https://doi.org/10.1109/TPEL.2015.2487821)
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Abstract
This paper proposes a novel DC-DC converter topology to achieve an ultra-high step-up ratio while maintaining a high conversion efficiency. It adopts a three degree of freedom (3DoF) approach in the circuit design. It also demonstrates the flexibility of the proposed converter to combine with the features of modularity, electrical isolation, soft-switching, low voltage stress on switching devices, and is thus considered to be an improved topology over traditional DC-DC converters. New control strategies including the two-section output voltage control and cell idle control are also developed to improve the converter performance. With the cell idle control, the secondary winding inductance of the idle module is bypassed to decrease its power loss. A 400-W DC-DC converter is prototyped and tested to verify the proposed techniques, in addition to a simulation study. The step-up conversion ratio can reach 1:14 with a peak efficiency of 94% and the proposed techniques can be applied to a wide range of high voltage and high power distributed generation and DC power transmission.
ORCID iDs
Hu, Yihua, Wu, Jiande, Cao, Wenping, Xiao, Weidong, Li, Peng ORCID: https://orcid.org/0000-0003-3865-2998, Finney, Stephen J. ORCID: https://orcid.org/0000-0001-5039-3533 and Li, Yuan;-
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Item type: Article ID code: 55778 Dates: DateEvent31 July 2016Published6 October 2015Published Online29 September 2015AcceptedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 07 Mar 2016 14:35 Last modified: 05 Dec 2024 01:11 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/55778