A Back-to-Back 2L-3L Grid Integration of a Marine Current Energy ConverterReport as inadecuate




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Division of Electricity, Swedish Centre for Renewable Electric Energy Conversion, Uppsala University, P.O. Box 534, 751 21 Uppsala, Sweden





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Academic Editor: Jens Peter Kofoed

Abstract The paper proposes a back-to-back 2L-3L grid connection topology for a marine current energy converter. A prototype marine current energy converter has been deployed by a research group at Uppsala University. The concept behind the prototype revolves around a fixed pitch vertical axis turbine directly connected to a permanent magnet synchronous generator PMSG. The proposed grid connection system utilizes a well known and proven two level voltage source converter generator-side combined with a three-level cascaded H-bridge CHB multilevel converter grid-side. The multilevel converter brings benefits in terms of efficiency, power quality and DC-link utilization. The system is here presented for a single marine current energy converter but can easily be scaled up for clusters of marine current energy converters. Control schemes for both grid-side and generator-side voltage source converters are presented. The start-up, steady state and dynamic performance of the marine current energy converter are investigated and simulation results are presented in this paper. View Full-Text

Keywords: marine current energy converter; grid connection; three-level cascaded H-bridge marine current energy converter; grid connection; three-level cascaded H-bridge





Author: Senad Apelfröjd * , Rickard Ekström, Karin Thomas and Mats Leijon

Source: http://mdpi.com/



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