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Tidal current phasing along the coast of Norway
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2016 (English)Conference paper (Refereed)
Abstract [en]

Tidal currents provide an intermittent source of renewable energy. A high degree of intermittency is unfavorable in the existing power system. However, by aggregating tidal power from sites with variable tidal phase a more firm power outpu tmay be achieved. In this paper, the tidal current phasing between 114 potential tidal energy sites along the Norwegian coast is investigated. Time series of tidal currents are generated with a model that considers the variation in current strength due to the variability in the semi-diurnal tidal cycle (spring to neap, flood to ebb, first to second daily tide etc.). From these, available kinetic energy in the natural flow is calculated. A constant conversion rate is then applied to give the power output at each site. Three scenarios, with varying number of sites and energy extraction, are investigated. The variability in each scenario is quantified on different time scales by filtering the aggregated power and calculate standard deviation and step change. It is found that the variability can be lowered by choosing sites with an advantageous time lag and limit the power output from the most energetic sites. As expected, smoothing is most distinct on short time scales.

Place, publisher, year, edition, pages
2016.
Keyword [en]
Tidal energy, tidal phasing, variability optimization, significant impact factor, model scenarios
National Category
Ocean and River Engineering Marine Engineering Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:uu:diva-307495OAI: oai:DiVA.org:uu-307495DiVA: diva2:1056146
Conference
3rd International Asian Wave and Tidal Energy Conference (AWTEC), Singapore 24-28 oct, 2016
Funder
StandUpÅForsk (Ångpanneföreningen's Foundation for Research and Development), 16-196
Available from: 2016-12-14 Created: 2016-11-16 Last updated: 2016-12-14

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