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Localization of series arc faults in dc microgrids is an important requirement to guarantee operational safety and uninterrupted power to end users. In the previous EPE-ECCE proceeding, a theoretical proof was provided for the selective series arc detection using a novel algorithm. In the current paper, the concept is validated by showcasing real time localized detection when series arc is initiated...
This paper provides an empirical study on series arc behavior in low voltage dc microgrids. The response of an R-L-C dc microgrid abstraction towards series arcs is studied experimentally for varying grid inductance, dc voltages, load capacitances and load currents. In order to account for the stochastic nature of arcs, experiments are repeated multiple times under similar conditions to gain statistical...
Unplugging of energized loads in dc microgrids can cause safety concerns to users in residential areas. Sustained series arcs are more relevant in dc systems than in ac due to absence of current zero crossing. In this paper, the series arcs are detected from the load side, wherein, the proposed algorithm monitors the drop in load capacitor voltage associated with the intial electrode dependent series...
Due to the absence of current zero crossing, dc arcs do not extinguish as easily as ac ones. It is essential to detect and eliminate series arc faults in dc microgrids in order to ensure safety, particularly while unplugging loads. Several detection and extinction methods using various means are known in literature. In this paper a novel arc detection method is proposed. It detects the load side input...
DC microgrids can connect directly dc renewable energy sources with increasing amount of dc loads. In this paper it is looked for possible architectures for integrating PV panels into dc microgrids, by means of microconverter strings. Three topologies are considered, featuring only buck microconverters and only boost microconverters, since they promise higher efficiency due to fewer semiconductors...
Using SiC MOSFET switches, this paper presents efficiency improvements in a dc-dc modular multilevel power electronic converter for wave energy extraction via electro active polymer. The total energy gain is estimated through a loss model for the SiC-MOSFET and compared with Si-IGBT based power electronic converter. Overall, in one energy cycle, up to 50% less energy loss was observed with the developed...
The development of a Smart Charging Controller (SCC) for dynamic charging of Electrical Vehicles (EVs) is described in this paper. The controller makes it possible to charge electric cars with the fluctuating power generated by photovoltaic panels. This way, a house owner can utilize their own produced energy locally. When solar power is not enough, the controller dynamically regulates the charging...
This paper introduces a separate control method for modules of the bidirectional modular multilevel dc-dc power converter in order to improve overall converter efficiency. The proposed multilevel power converter topology is based on a Dual Active Bridge (DAB) converter as elementary electrical building block — module. Using efficiency curves it is determined how the modules should be separately controlled...
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