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In this work, the quadruple active bridge dc-dc converter (QAB) is proposed to be used as a building block to implement the dc-dc stage of a Smart Transformer. Different configuration for this converter are possible and all of them are considered for investigation. Thus, four different architectures of ST, including one based on the Dual Active Bridge (DAB) converter, are presented and compared in...
One of the main challenges of a Solid-State transformer (SST) lies in the dc-dc conversion stage. In this work, a Quadruple-Active-Bridge (QAB) dc-dc converter is investigated to be used as the basic module for the whole dc-dc stage. Besides the feature of high power density and soft-switching operation, the QAB converter provides a solution with a reduced number of high frequency transformers, since...
The Smart Transformer, a Solid-State transformer with control functionalities, is a promising smart grid technology. One of the main challenge of this system lies in making available a Medium-Voltage dc link, which can be tackled with modular solution. Thus, several isolated dc-dc converter can be used as a basic modules. In this paper, a Quad-Active-Bridge (QAB) dc-dc converter is used as modules...
Learning processes and learning mechanisms are constantly evolving. The traditional classroom boards are replaced by Internet technologies, while the old handwritten notes are progressing to electronic notes. Through this evolution offered by new technologies, such as Web 2.0 and mobile and ubiquitous computing, learning agents need to adjust to this new reality. Distance, electronic, and mobile learning...
This paper presents the use of a multiprocessor architecture for the performance improvement of tomographic image reconstruction. Image reconstruction in computed tomography (CT) is an intensive task for single-processor systems. We investigate the filtered image reconstruction suitability based on DSPs organized for parallel processing and its comparison with the Message Passing Interface (MPI) library...
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