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Multilevel Inverter for Wave Power Conversion
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2011 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis deals with the electrical system analysis of a Wave Energy Converter (WEC) for the objective of grid connection. The Linear Permanent Magnet Generator (LPMG) is modeled and validated with experimental results. The comparison studies establish that this model is useful for the subsequent system modeling and performance analysis. To simplify the generator side control, diode bridge rectifiers are used for rectification. To reduce the size and cost of energy storage elements, DC voltage regulation is done using a DC/DC converter. Since the buoy has limited control, the electrical system needs additional design requirements. Moreover, to achieve smooth and high power, many WEC are connected to a common DC link. As a result, the inverter for the DC/AC conversion should be capable to withstand the low frequency instantaneous power peaks. Conventional multilevel inverters are considered for the initial analysis. The Neutral Point Clamped (NPC) inverter is chosen for the detailed analysis due to its advantages over other topologies. Voltage balancing technique and current control method are examined. The experimental performance of NPC converter for the WEC will be the focus in future.

Place, publisher, year, edition, pages
Uppsala: Institutionen för teknikvetenskaper, Uppsala universitet , 2011. , 44 p.
Series
UURIE / Uppsala University, Department of Engineering Sciences, ISSN 0349-8352 ; 325-11L
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-164351OAI: oai:DiVA.org:uu-164351DiVA: diva2:467656
Available from: 2012-01-03 Created: 2011-12-19 Last updated: 2012-01-03Bibliographically approved

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Krishna, Remya

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