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Recently, the transformerless design of medium-voltage drives is an emerging design concept of variable-speed drives (VSD). Here, no dedicated feed transformer is used. The VSD is directly connected to the on-site facility transformer, where multiple other loads are connected as well. The benefits of such a transformerless VSD are reduced total volume, weight, losses, and system costs. However, without...
Recently, the transformerless design of medium-voltage (MV) drives is an emerging design concept of variable-speed drives (VSD). Here, no dedicated feed transformer is used. The VSD is directly connected to the on-site facility transformer, where multiple other loads are connected as well. The benefits of such a transformerless VSD are the reduced total volume, weight, losses and system costs. In...
In this paper a three-phase converter is designed and used as a shunt active harmonic filter. To realize active power filtering (APF) various different control techniques exist. In this work the multi-synchronous reference frame (MSRF) and the single-synchronous reference frame (SSRF) are compared both in simulation and experimental results and computational effort. All results are investigated in...
Battery energy storage systems (BESS) become increasingly more important due to the impact of volatile energy sources on the power supply and present a good solution for buffering the power imbalances in the electric grid. Particularly with regard to a future scenario with electrical energy, means have to be taken to ensure a stable and reliable power supply. Redundant BESS allow normal operation,...
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