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Elkvalitet och elkvalitetsmätningar
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
Power quality and power quality measurements (English)
Abstract [sv]

I takt med att dagens samhälle ställer högre krav på störningsfri elleverans samt en vilja till att ständigt förbättra elkvaliteten. Detta ger elkvalitet och elkvalitetsmätningar en större betydelse för både elleverantörerna och deras kunder.Som ett led i att säkerställa en god elkvalitet behövs speciella instrument som mäter och analyserar de parametrar som orsakar en försämrad elkvalitet. Dagens problematik är att många moderna utrustningar påverkar elkvaliteten negativt samtidigt som andra moderna installerade utrustningar är mera störningskänsliga. Genom att installera ett heltäckande elkvalitetssystem för mätning av elkvalitet kan problem upptäckas innan dessa ger upphov till driftstörningar eller skador på ansluten utrustning. Idag mäts framförallt elkvalitet på elleverantörernas 10, 40 och 130 kV nät. Ambitionen är att få bättre övervakning på lågspänningsnäten 0,4 kV.I detta arbete visas ett förslag på hur ett integrerat elkvalitetssystem bestående av både elnätsanalysatorer och energimätare utrustade med en elkvalitetsmodul kan utformas. Med ett integrerat system fås en överblick enklare fram ifall någon av lågspänningskunderna bidragit till en försämrad elkvalitet.

Abstract [en]

Today's society places a greater demands on interference-free electric distribution and a desire for a constant efficiency on power quality. Power quality and power quality measurements are continually becoming a more important issue to both the electricity suppliers and their customers.As a part of ensuring good power there's a requirement for special instruments that measure and analyses the parameters that is the cause of deterioration of power quality. Today's problem is that many modern devices has a negative effect on power quality while other modern devices are more sensitive to disturbance. By installing a comprehensive power quality system for measurement of power quality, some problems can be detected before they give rise to malfunction or damaging any of the connected equipment. As today, measurements on power quality are mainly focus on the suppliers' 10, 40 and 130 kV grid, with the ambition of creating a better surveillance on the low voltage grid, 0.4 kV.In this report a proposal of how an integrated power quality system consisting both of power quality analyzers and energy meters equipped with a power quality module could be designed. With an integrated system there will be easier to detect of someone of the low voltage costumers contributes to a deterioration of power quality.

Place, publisher, year, edition, pages
2015. , p. 27
Keywords [en]
Electric quality, Power quality
Keywords [sv]
Elkvalitet, Distribuering
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hv:diva-8275Local ID: EXH300OAI: oai:DiVA.org:hv-8275DiVA, id: diva2:857389
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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