Control of Cascaded Multilevel Converter for Wave Energy Applications

Henry M. Zapata, Marcelo A. Perez and Abraham Marquez Alcaide ()
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Henry M. Zapata: Department of Electronics, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile
Marcelo A. Perez: Department of Electronics, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile
Abraham Marquez Alcaide: Electronic Engineering Department, Universidad de Sevilla, 41004 Sevilla, Spain

Energies, 2022, vol. 16, issue 1, 1-12

Abstract: This paper proposes a control scheme for a wave energy conversion system based on a linear generator and a cascaded multilevel converter. The mechanical conversion system is composed of a buoy connected directly to a linear generator. The windings of the generator are individually controlled by a cascaded multilevel power converter using independent maximum power point tracking to improve energy harvesting. The output of the cascaded converter is controlled to keep the DC capacitors balanced and generate a multilevel voltage at the output terminals which reduces the losses in the underwater transmission line. Experimental results show the performance of the proposed control scheme maximizing the power generation by imposing a current with the same waveform of the induced voltage and balancing the DC capacitors.

Keywords: wave energy converter; linear generator; cascaded multilevel converter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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