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Reaktiv effektkompensering i Umeå Energis elnät
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2017 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Compensation of reactive power in the power grid of Umeå Energi AB (English)
Abstract [sv]

På grund av ökad kablifiering i Umeå Energis nät samt ett avtal med regionnätsägaren som kommer att prissätta inmatning av reaktiv effekt i anslutningspunkten, har behovet av kompensering av reaktiv effekt aktualiseras. Denna rapport skall undersöka de reaktiva effektflödena i 145 kV-nätet, undersöka optimal kompenseringsutrustning samt optimal placering av kompensering. De reaktiva effektflödena i nätet beräknades både med och utan projekterad kablifiering. Vilket skulle ge upphov till ca 30 respektive 60 MVAr. De första jämfördes med timvärden från anslutningspunkten till regionnätsägaren. Detta verkar korrespondera med den maximala reaktiva effektproduktionen under 2016. Med denna jämförelse samt beräkningar av nätet efter kablifiering, gjordes en uppskattning på framtida kompenseringsbehov. Under undersökningen har det visat sig att två stycken Variabla shunt reaktorer skulle vara en lämplig lösning för detta problem. Tre lösningsförslag tas upp i denna rapport. Lösningsförslag 1: 1st 55-62 MVAr VSR at F-Stn 15 och 1st (Storlek bestäms senare) MVAr i F-Stn 30. Lösningsförslag 2: 30-40 MVAr VSR i F-Stn 15 samt 1st 30-40 MVAr i F-Stn 30. Lösningsförslag 3: 1st 30-40 MVAr VSR i FStn 15 samt 1st 30-40 MVAr i F-Stn 10.

Abstract [en]

Due to an increase in cables and voltage levels in Umeå Energi’s power grid and consequently an increase in reactive power production, coupled with an agreement with the regional power grid owner whom will start to charge money for reactive power flow up into their grid. And thus the need for compensation of reactive power has been actualized.

The reactive powerflow in the grid was calculated with and without planned cable installations. Which would give rise to about 30 and 60 MVAr respectivly. The first of the two was compared to the measurement of the reactive power flow at the connection point of the regional grid owner. This seems to correspond to the maximum reactive power production under 2016. Using this comparison with the calculations of the grid, post cable installation, an estimation was made regarding the future compensation needs.

During this inquiry it became clear that two Variable Shunt Reactors would be the optimal solution for this problem. Three solutions has been produced in this report. Solution 1: 1 55-62 MVAr VSR in Substation 15 and 1 TBD MVAr VSR in Substation 30. Solution 2: 1 30-40 MVAr VSR in Substation 15 and 1 30-40 MVAr VSR in Substation 30. Solution 3: 1 30-40 MVAr VSR in Substation 15 and 1 30-40 MVAr VSR in Substation 10.

Place, publisher, year, edition, pages
2017. , 30 p.
Series
EL, 1707
Keyword [sv]
Effektkompensering, reaktiv effektkompensering, variabel shunt reaktor, elnät
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:umu:diva-137149OAI: oai:DiVA.org:umu-137149DiVA: diva2:1115518
External cooperation
Umeå Energi AB
Educational program
Högskoleingenjörsprogrammet i Elkraftteknik - nätbaserat
Supervisors
Examiners
Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2017-06-29Bibliographically approved

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Reaktiv effektkompensering elnät(1649 kB)7 downloads
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Electrical Engineering, Electronic Engineering, Information Engineering

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
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