Repetitive Controller for Low Grid Current Harmonics in a Hybrid Parallel Electrolysis Rectifier
Conference: NEIS 2019 - Conference on Sustainable Energy Supply and Energy Storage Systems
09/19/2019 - 09/20/2019 at Hamburg, Deutschland
Proceedings: NEIS 2019
Pages: 7Language: englishTyp: PDF
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Authors:
Bintz, Steffen; Haarer, Joerg; Roth-Stielow, Joerg (Institute for Power Electronics and Electrical Drives, University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany)
Abstract:
As water electrolysis for energy storage or sector coupling becomes more relevant, suitable rectifiers for grid integration are needed. A promising rectifier concept for this application is a combination of a thyristor rectifier, which offers a high efficiency at the needed high currents, and a parallel voltage source inverter (VSI) for grid current correction and DC-output smoothing at the same time [1]. However, as the desired low grid current harmonics can only hardly be achieved with a conventional controller, a repetitive control concept for the VSI is introduced. The proposed system is verified with measurements on a 5 kW demonstrator circuit of the proposed topology.