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Simulering av kärnkraftsanläggning: Inkopplingsström vid snabbomkoppling
Mid Sweden University, Faculty of Science, Technology and Media, Department of Computer and Electrical Engineering (2023-).
2024 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Denna rapport undersöker konsekvenserna av att höja gränsen för faslägesskillnad mellan inkommande nät vid snabbomkoppling i Fors-marks kärnkraftverk. Genom simulering i DIgSILENT PowerFactory analyseras hur asynkronmotorer i underliggande nät påverkas av olika faslägesskillnader och omkopplingstider. Resultaten visar att en höjning av den tillåtna faslägesskillnaden kan medföra att inkopplings-strömmarna överstiger säkerhetsgränserna, vilket riskerar att skada utrustningen. Studien rekommenderar att en lösning där olika gränser för faslägesskillnaden kan användas beroende på omkopplingens riktning. Detta skulle möjliggöra snabbomkoppling vid en högre faslägesskillnad i en av riktningarna. Vidare konstateras att snabbomkoppling i den andra riktningen är problematisk och att vidare studier behövs innan en högre faslägesskillnad kan tillåtas i den riktningen.

Abstract [en]

This report investigates the consequences of increasing the phase angle difference limit between incoming grids during fast switching at Forsmark nuclear power plant. Through simulations in DIgSILENT Power-Factory, the impact on asynchronous motors in the underlying grid is analyzed for various phase angle differences and switching times. The results show that increasing the allowable phase angle difference may cause inrush currents to exceed safety limits, which risks damaging the equipment. The study recommends a solution where different limits for phase angle difference can be used depending on the direction of the switching. This would enable fast switching at a higher phase angle difference in one direction. Furthermore, it is concluded that fast switching in the other direction is problematic and that further studies are needed before a higher phase angle difference can be allowed in that direction.

Place, publisher, year, edition, pages
2024. , p. 33
Keywords [en]
Phase Angle Difference, Rapid Switching, Induction Motor, Inrush Current
Keywords [sv]
Faslägesskillnad, Fasvinkelskillnad, Snabbomkoppling, Asynkronmotor, Powerfactory, Inkopplingsström
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-52485OAI: oai:DiVA.org:miun-52485DiVA, id: diva2:1898210
Subject / course
Electrical Engineering ET2
Educational program
Electric Power Engineering TEKRG 180 higher education credits
Supervisors
Examiners
Available from: 2024-09-17 Created: 2024-09-17 Last updated: 2024-09-17Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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