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Control Algorithms Implementation for LVACDC Active Frontend

Banjac, Anja; Svec, Philipp; Miletic, Zoran; Stöckl, Johannes

For the implementation of the DC microgrid part of the Italian demonstration in particular a Low Voltage Alternating Current (LVAC) to Direct Current (DC) Active Front End (AFE) is required. Therefore, within HYPERRIDE a bidirectional 34.5 kVA Alternating Current and Direct Current (ACDC) power electronics converter unit from AIT has been used as a basis to implement control algorithms to serve as an AFE and to supply DC microgrids from LVAC power lines. The bidirectional topology enables further to provide power flow towards the DC grid as well as to remove excess generation when a surplus of energy is available.

The developed droop control uses the voltage of the Point of Common Coupling (PCC) as a parameter to control the delivered power. Within the respective task, the control algorithm has been defined, tested and validated in a Controller Hardware-in-the-loop (C-HIL) environment.

In a subsequent step, the unit has been set up as real hardware to test the control algorithm. Successful tests were carried out in the AIT laboratory premises and results are reported in this document.

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