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Analys & kartläggning av Uddevalla citys mellanspänningsnät
University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
2015 (Swedish)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesisAlternative title
Analysis & mapping of the medium voltagenetwork in Uddevalla city (English)
Abstract [sv]

Kraven på ett driftsäkert elnät ökar hela tiden i takt med att elanvändning blir allt viktigare i dagens samhälle. Luftledningar byts ut med markkabel och möjlighet till reservmatningar samt bra elkvalitet är av hög prioritering.

Skicket på elnätets utrustning försämras med åren och kommer med tiden behöva bytas ut. Med uppdrag från Uddevalla Energi AB har siffror tagits fram berörande spänningsfall, kapacitiv jordfelsström och belastningar vid normaldrift och reservmatning, samt ålder och typ på kablar i Uddevalla citys mellanspänningsnät. Den här rapporten presenterar dessa resultat och ger några förslag på ändringar om så krävs. Även en del om planerade framtida utbyggnationer tas upp och hur dessa påverkar nätet.

För att få fram resultaten används Uddevalla Energis program för nätberäkning, "DpPower".

Beräkningarna visade att vid normaldrift var alla värden godkända enligt tumregler som Uddevalla Energi följer. Vid reservmatning däremot var vissa linjer överbelastade, analysen visar dock tillgängliga lösningar. Ålder och status på kablar i nätet varierar stort vilket gör det svårt att specificera hur ombyggnationer ska ske. Hänsyn bör istället tas till överbelastningar.

Abstract [en]

The demand of reliable power distribution is increasing as the usage of power is increasing in the society of today. Overhead lines are replaced by underground cables, availability to reserve power supply and power quality is of high priority.

The condition of the equipment deteriorates over the years and will eventually have to be replaced. By request from Uddevalla Energi, values have been provided concerning voltage drop, capacitive ground fault current and loads during normal operation and standby power supply. The types and ages of cables in Uddevalla City’s high-voltage network has also been looked at. This report presents these results and gives some suggestions for modifications if required. Planned future deployments are looked over and how these may affect the network.

To obtain these results the network calculating program "DpPower" was used.

The calculations presented shows that in normal operation all values are approved within the company standards that Uddevalla Energi follows. For the reserve supply however, some lines are overloaded. The analysis shows possible solutions for these issues. Age and status of cables in the network varies widely, making it difficult to specify how redevelopments should take place. Instead the overloads should be given more consideration.

Place, publisher, year, edition, pages
2015. , 31 p.
Keyword [en]
Cables, voltage drop, load, ground fault current, standby power supply
Keyword [sv]
Kablar, spänningsfall, belastning, jordfelsström, reservmatning
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hv:diva-8291Local ID: EXH300OAI: oai:DiVA.org:hv-8291DiVA: diva2:857597
Subject / course
Electrotechnology
Educational program
Elkraft
Supervisors
Examiners
Available from: 2015-09-30 Created: 2015-09-29 Last updated: 2015-12-22Bibliographically approved

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13fd45f95d681e5ef42bd1ffcb1d852b9a161ac72d1244789548ea0081a29fbdd6f29c6d6e5444adffb603b7161791998c3b5c2619c5de0dc2bc04e84709baa3
Type fulltextMimetype application/pdf

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Citation style
  • apa
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