Control of a Four-wire Hybrid Prosumer Converter for Balancing Utility Grids
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Faculty of Electrical Engineering and Computer Science, Department of Electrical Drives and Machines, Lublin University of Technology, Lublin, Poland
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Łukasz Kwaśny   

Lublin University of Technology
Power Electronics and Drives 2021;6 (41):1-11
The paper presents the project of the power electronic AC/DC converter for prosumer applications operating under a multi-resonant control algorithm. This design allows independent control of active and reactive power for each or any phase. The converter and its algorithm are based on a three-phase converter of four-wire topology (AC/DC 3f-4p) with a DC bus, which couple the converter with a renewable energy source and energy storage. Model and simulation tests were carried out in the Matlab-Simulink programming environment. The results obtained indicate that operation with deep unbalances and powers of opposite signs in individual phases leads to current oscillations in the DC line. This is a significant limitation and the conclusion is that the level of asymmetry should be limited to the level acceptable by the energy storage.
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