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Photovoltaic Power in the Swedish Grid: How to Deal with Solar Electricity Overproduction in the Future
Dalarna University, School of Technology and Business Studies, Energy and Environmental Technology.
2007 (English)Independent thesis Advanced level (degree of Master (Two Years))Student thesis
Abstract [en]

Due to the continued growth of installed area of Photovoltaic (PV) panels, Sweden will face a problem with electricity overproduction when PV panel production accounts for about 9% of total yearly electricity demand. Although this scenario might be over a decade away from happening it is important to look ahead now and make sure that our current practices and standards do not lead us into trouble in the future. This thesis explores the issue of Photovoltaic electricity overproduction in Sweden. The methodology of this work includes analyzing hourly weather data measured in five Swedish cities over several years and hourly electricity demand data of whole Sweden. A solar simulation program was written that would use the hourly weather data and calculate hourly insolation on tilted surfaces. The solar simulator output was used to calculate the area of PV when overproduction becomes a problem in Sweden and to explore the effect of surface tilt and orientation on yearly usable electricity production when the PV area grows beyond that point. This area is referred to as A0 in this text, and the best guess for Sweden was about 128 million square meters. Some scenarios with an installed PV area equal to different multiples of A0 were studied. Options of varying tilt and orientation angle could be evaluated to see which one would result in the highest yearly output. For example when the installed area equals 2 x A0 the highest output from the PV panels result from pointing the panels in the same way as with no overproduction. Only a 6% overproduction loss is suffered from doubling the Max Area of Zero Overproduction and PV would be able to cover about 17% of the yearly Swedish electric demand. Beyond doubling of A0 the angles become less important. This is because as the overproduction becomes higher for the optimal angles the non-optimum angles which are able to avoid overproduction will still have comparable yield. However the best yields are generated by the optimal angles found at 1 x A0. In Sweden the PV market can continue to grow until it covers about 15 to 17 percent of the annual electric demand before starting to suffer significant losses from electricity overproduction. In order to maximize yearly output the overproduction must be accepted and as PV continues to grow perhaps grid energy storage should be implemented.

Place, publisher, year, edition, pages
Borlänge, 2007. , p. 58
Identifiers
URN: urn:nbn:se:du-2969OAI: oai:dalea.du.se:2969DiVA, id: diva2:518310
Uppsok
Technology
Supervisors
Available from: 2007-10-30 Created: 2007-10-30 Last updated: 2012-04-24Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • chicago-author-date
  • chicago-note-bibliography
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf