Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Projektering av allmänt lokalnät i landsbygdsmiljö med analys av kapacitivaströmmar
Högskolan i Halmstad, Akademin för informationsteknologi.
Högskolan i Halmstad, Akademin för informationsteknologi.
2019 (svensk)Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
Abstract [en]

A general local powerline has implemented to mimic a lifelike powerline build around 1960s in thecountryside. Since reconstruction is needed a new projection is made of the area to improve the powerquality. The projection includes the old transmission lines will be replaced with underground powercables to make it weatherproof. The implication of underground power cables leads to smaller distancebetween the phases which generates greater capacitance. Due the increase will make the capacitivecurrents greater as well which affect the power quality for the costumers in the area.

The projectionmust be adapted to the increase of earth fault currents which the capacitive currents contribute. The regeneration of the old and new power lines consists a sketch of terrain, merge of the powerconsumption, electrical fuses, line diagram, sizing transformers and right dimensions of cables. Calculations on capacitive fault current, voltage drop as well as neutral grounding reactor (a resistanceparallel with an inductor) was executed. Calculations of the powerline followed Swedish standard andthe neutral ground reactor after the norms of Swedish electrical industry.

Regard to the projection, including underground cables, the capacitive fault currents increased with 46,75 times compared to transmission powerlines at 10 kV. Calculations of the neutral ground reactorresulted in 5,25 Henry for the inductor and 1154 Ohm for the resistor to compensate the gain. The conclusion is that weatherproofing the powerline at 10 kV leads to compensating otherwise the powerquality and selectivity will be affected. That result in a more expensive arrangement cost forunderground cables compared to transmission.

sted, utgiver, år, opplag, sider
2019. , s. 57
Emneord [sv]
kapacitiva strömmar, projektering, kabelförläggning, luftledning, lokalnät, nollpunktsreaktor
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-39731OAI: oai:DiVA.org:hh-39731DiVA, id: diva2:1323790
Utdanningsprogram
Electrical Engineer, 180 credits
Veileder
Examiner
Tilgjengelig fra: 2019-06-18 Laget: 2019-06-12 Sist oppdatert: 2019-06-18bibliografisk kontrollert

Open Access i DiVA

fulltext(6544 kB)29 nedlastinger
Filinformasjon
Fil FULLTEXT02.pdfFilstørrelse 6544 kBChecksum SHA-512
8ac5759191657346f14aae13bdc711baf1da8215b64ad9c3aed56a363788dedfdd9ad1c0c0cadd3828740f9c8f30732cc623a9b00e1e1d117c416bfe2313019b
Type fulltextMimetype application/pdf

Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 29 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 31 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf