Wave to wire power maximisation from a wave energy converter

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dc.contributor.author O'Sullivan, Adrian C. M.
dc.contributor.author Lightbody, Gordon
dc.date.accessioned 2017-09-15T10:17:14Z
dc.date.available 2017-09-15T10:17:14Z
dc.date.issued 2015-09-07
dc.identifier.citation O’Sullivan A. C. M. and Lightbody G. (2015) ' Wave to Wire Power Maximisation from a Wave Energy Convert ', 11th European Wave and Tidal Energy Conference (EWTEC), Nantes, France, 6-11 September. en
dc.identifier.startpage 1 en
dc.identifier.endpage 9 en
dc.identifier.uri http://hdl.handle.net/10468/4701
dc.description.abstract In this paper a back-to-back voltage source converter controlled linear permanent magnet generator (LPMG) is utilised as the power take off (PTO) for a point absorber wave energy converter system (WEC). It is shown that reactive control which seems promising when an ideal PTO is assumed, is actually infeasible with a real PTO as the electrical losses of the LPMG are excessive when the wave frequency is lower than the natural frequency. A Zero Order Hold (ZOH) and First Order Hold (FOH) Model Predictive Control (MPC) which maximises the mechanical power is first utilised. The two MPC systems show that more electrical power is extracted for a lower horizon when the MPC is optimised for mechanical power. The electrical losses from the LPMG and voltage source converter (VSC) are then incorporated in the cost function of the MPC systems and demonstrates significant improvements in the electrical power extracted when compared to the electrical power extracted via mechanical power optimisation. PTO force and heave displacement constraints are then incorporated into the optimisation, to further demonstrate the limitations of performance when a realistic PTO is utilised. It is shown here that the electrical power can be maximised, whilst the PTO force and heave displacement are shown to be within limits. The power quality from the ZOH MPC is then compared to the power quality from the FOH MPC. en
dc.description.sponsorship Science Foundation Ireland (SFI Centre for Marine Renewable Energy Research (12/RC/2302)) en
dc.description.uri http://www.ewtec.org/conferences/ewtec-2015/ en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher EWTEC en
dc.relation.ispartof European Wave and Tidal Energy Conference
dc.relation.uri http://www.ewtec.org/proceedings/
dc.rights © 2015 EWTEC en
dc.subject Reactive control en
dc.subject MPC en
dc.subject LPMG en
dc.subject Power maximisation en
dc.subject Constraints en
dc.subject Power quality en
dc.subject ZOH en
dc.subject Wave energy en
dc.subject Wave energy converters en
dc.title Wave to wire power maximisation from a wave energy converter en
dc.type Conference item en
dc.internal.authorcontactother Adrian O'Sullivan, Studentships, University College Cork, Cork, Ireland. +353-21-490-3000 Email: adrian.osullivan@umail.ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2017-09-14T10:34:16Z
dc.description.version Accepted Version en
dc.internal.rssid 411029112
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle EWTEC proceedings en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.conferencelocation Nantes, France en
dc.internal.IRISemailaddress adrian.osullivan@umail.ucc.ie en

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