Unregulated Series Resonant Converter for Interlinking DC Nanogrids

Kevin Tomas Manez, Zhe Zhang, Ziwei Ouyang

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Abstract

DC nanogrids have become a subject of interest inrecent years due to the increase of renewable energy sources with energy storage systems. Hybrid AC/DC systems with different DCbuses are an interesting solution to efficiently supply different AC and DC loads. In this paper, a high efficiency bidirectional converter to interlink a 400V DC bus with a 48V DC bus ispresented. The proposed converter is based on a LLC resonant converter operating as a DC transformer at a fixed frequency and duty cycle without any complex control strategy. A clearand simplified design procedure for high efficiency operation and optimal self-load regulation is presented. To verify the converter operation, a 1kW prototype has been implemented, featuring on maximum efficiency of 96:7% and a self-regulated output voltage with 3% of maximum offset from the nominal voltage.
Original languageEnglish
Title of host publicationProceedings of the 12th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2017)
PublisherIEEE
Publication date2017
Pages647-654
ISBN (Electronic)978-1-5090-2364-6
DOIs
Publication statusPublished - 2017
Event12th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2017) - Honolulu, United States
Duration: 12 Dec 201715 Dec 2017

Conference

Conference12th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2017)
CountryUnited States
CityHonolulu
Period12/12/201715/12/2017

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