Journal ArticleDOI
Comprehensive Conceptualization, Design, and Experimental Verification of a Weight-Optimized All-SiC 2 kV/700 V DAB for an Airborne Wind Turbine
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In this article, a minimum weight input series output parallel structured dual active bridge (DAB) converter for an airborne wind turbine system is designed and implemented, and the design includes all necessary considerations to realize a fully functional prototype, i.e., it also considers the auxiliary supply, the control for a stable operation of the system, which also comprises an input filter, over the specified operating range, and start-up and shut down procedures.Abstract:
This paper details the design, implementation, and experimental verification of a minimum weight input series output parallel structured dual active bridge (DAB) converter for an airborne wind turbine system. The main power components of the DAB converter, particularly the bridge circuits, the actively cooled high-frequency transformer and inductor, and the cooling system, which largely contribute to the total system weight, are designed and realized based on multiobjective considerations, i.e., with respect to weight and efficiency. Furthermore, the design includes all necessary considerations to realize a fully functional prototype, i.e., it also considers the auxiliary supply, the control for a stable operation of the system, which also comprises an input filter, over the specified operating range, and the start-up and shut down procedures. These considerations show the complex interactions of the various system parts and reveal that a comprehensive conceptualization is necessary to arrive at a reliable minimum weight design. Experimental results validate the proposed design procedure for a realized lightweight DAB hardware prototype with a rated power of $ \mathrm {6.25~\,kW}$ . The prototype weighs $ \mathrm {1.46~\,kg}$ , i.e., features a power-to-weight ratio of $ \mathrm {4.28~\,kW{/}\,kg}$ ( $ \mathrm {1.94~\,kW{/}\,lb}$ ), and achieves a maximum full-load efficiency of 97.5%.read more
Citations
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Journal ArticleDOI
Applicability of Solid-State Transformers in Today’s and Future Distribution Grids
Jonas E. Huber,Johann W. Kolar +1 more
TL;DR: It is found that SSTs are less efficient than low-frequency transformers (LFTs), yet their prospective prices are significantly higher, and four essential challenges in detail are discussed, distilled into an applicability flowchart for SST technology.
Journal ArticleDOI
A Review of Power Electronics for Grid Connection of Utility-Scale Battery Energy Storage Systems
Guishi Wang,Georgios Konstantinou,Christopher D. Townsend,Josep Pou,Sergio Vazquez,Georgios Demetriades,Vassilios G. Agelidis +6 more
TL;DR: In this paper, the authors present a comprehensive review of power electronics (PE) topologies for utility BESS that have been proposed either within industry or the academic literature, and a comparison of the presently most commercially viable topologies is conducted in terms of estimated power conversion efficiency and relative cost.
Journal ArticleDOI
State of the art of solid-state transformers: Advanced topologies, implementation issues, recent progress and improvements
Mahammad A. Hannan,Pin Jern Ker,Molla Shahadat Hossain Lipu,Zhen Hang Choi,M. Safwan Abd. Rahman,Kashem M. Muttaqi,Frede Blaabjerg +6 more
TL;DR: This review comprehensively reviews the SST topologies suitable for different voltage levels and with varied stages, their control operation, and different trends in applications and provides recommendations for the improvement of future SST configuration and development.
Journal ArticleDOI
Power Electronic Transformer-Based Railway Traction Systems: Challenges and Opportunities
TL;DR: In this article, power electronic transformer (PET)-based railway traction systems are comprehensively reviewed according to the unique application features and requirements, and the key challenges and opportunities are identified and discussed.
Journal ArticleDOI
Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review
TL;DR: In this article, the authors classify, describe, and critically compare different modeling techniques and control methods for dual-active-bridge (DAB) dc-dc converters and provide explicit guidance about the DAB controller design to practicing engineers and researchers.
References
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Discrete-Time Signal Processing
TL;DR: In this paper, the authors provide a thorough treatment of the fundamental theorems and properties of discrete-time linear systems, filtering, sampling, and discrete time Fourier analysis.
Journal ArticleDOI
A Survey of Wide Bandgap Power Semiconductor Devices
TL;DR: In this article, a review of recent progresses in the development of SiC- and GaN-based power semiconductor devices together with an overall view of the state of the art of this new device generation is presented.
Journal ArticleDOI
Fibre reinforced composites in aircraft construction
TL;DR: A review of recent advances using composites in modern aircraft construction is presented and it is argued that fibre reinforced polymers, especially carbon fibre reinforced plastics (CFRP), can and will in the future contribute more than 50% of the structural mass of an aircraft as discussed by the authors.
Journal ArticleDOI
Design and Implementation of a Highly Efficient Three-Level T-Type Converter for Low-Voltage Applications
Mario Schweizer,Johann W. Kolar +1 more
TL;DR: The 3LT2C as mentioned in this paper combines the positive aspects of the two-level converter such as low conduction losses, small part count and a simple operation principle with the advantages of the three-level converters such as the low switching losses and superior output voltage quality.
Journal ArticleDOI
Closed Form Solution for Minimum Conduction Loss Modulation of DAB Converters
Florian Krismer,Johann W. Kolar +1 more
TL;DR: In this article, an optimal modulation scheme that enables minimum conduction and copper losses is presented for a bidirectional dual active bridge (DAB) dc-dc converter, which is employed for an automotive application.