Abstract
Operation of the four-leg three-level flying capacitor Grid-Connected Converter (GCC) for renewable energy source (RES) is presented in this paper. The GCC with proposed hierarchical control method enables operation in presence of electrical grid disturbances by switching all legs separately to stand-alone or grid-connected mode of operation, allowing energy transfer between them. Four-leg flying capacitor GCC with described control method may be treated as DC micro-grid supplied from three independent AC sources and RES. Therefore, the hierarchical control allows for effective power management of such system. The paper describes developed control system as well as presents simulation and experimental results measured on the 10 kVA laboratory converter.
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Acknowledgments
Described problems are the parts of the project number N N510 673540 “Transformer-less four-leg three-level converter for renewable energy systems” and sponsored by the National Science Centre.
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Kazmierkowski, M.P., Sędlak, M., Stynski, S., Malinowski, M. (2015). Hierarchical Control of Four-Leg Three-Level Grid-Connected Converter for RES. In: Gołębiowski, L., Mazur, D. (eds) Analysis and Simulation of Electrical and Computer Systems. Lecture Notes in Electrical Engineering, vol 324. Springer, Cham. https://doi.org/10.1007/978-3-319-11248-0_1
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DOI: https://doi.org/10.1007/978-3-319-11248-0_1
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