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WIREs Energy Environ.
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Experimental results from a linear wave power generator connected to a resonance circuit

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Abstract The output voltage from a direct‐driven permanent magnet linear generator installed in a wave power plant varies both in amplitude and frequency. Electrical conversion is therefore necessary before grid connection can be achieved. The aim of this paper is to present an electrical conversion system based on the electric resonance phenomena. As one of the first steps in the development, and to gain further knowledge and understanding of the proposed resonance circuit, experimental tests with a single‐phase permanent magnet linear generator connected to a resonance circuit were performed. The experimental results presented in this paper indicated that a successful resonance between the generator and external circuit was achieved. The research regarding the wave energy converters lies within The Lysekil Wave Power Project at Uppsala University and has been ongoing since 2002. This article is categorized under: Wind Power > Science and Materials Energy Infrastructure > Systems and Infrastructure
The wave energy converter.
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The voltage over the DC‐load.
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The simulated output voltage at different operating velocities. (Reprinted with permission from Ref 14. Copyright 2012, American Institute of Physics.)
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The experimental result at different operating velocities. (Reprinted with permission from Ref 14. Copyright 2012, American Institute of Physics.)
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The graph present voltage V2 and current I.
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(a) The linear generator utilized during the experiment, (b–d) presents a series of pictures of the linear generator during one of the tests.
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(a) Parallel‐connected capacitors and (b) series‐connected capacitors.
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A single‐phase resonance circuit.
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An electric circuit, presenting an inductor, a resistance, and a capacitor connected in series where the circuit is in electrical resonance.
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Schedule of the up to now utilized electric conversion system.
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