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Tillståndsövervakning av krafttransformatorer med tre fundamentala transformatorkvantiteter (TFQ)
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2016 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A major transformer failure is important to avoid both economically

and for the reliability of the power supply. Much can be won if

potential failures are detected in an early stage and preventive

measures can be taken. Condition monitoring is a process and

technique that focus on significant parameters with the potential to

indicate a failure under development.

Opportunities, benefits and possible drawbacks of using the method

with transformer fundamental quantities, TFQ, has been studied in

this thesis. Focus is on three basic transformer fundamental

quantities monitored; turn ratio, short-circuit impedance and power

loss. TFQ has been compared to conventional methods used today by

Vattenfall for condition monitoring of power transformers.

The business case possibilities for Vattenfall to use TFQ as input

for transformer diagnostics compared to conventional methods used

today has been estimated. The result is that condition monitoring

based on DGA (dissolved gas analysis), is more suited for Vattenfall

in the current situation. TFQ is more on a conceptual level than a

ready product.

The thesis has been carried out at Vattenfall Research and

Development, division of Power Technology, in Solna.

Place, publisher, year, edition, pages
UPTEC F, ISSN 1401-5757 ; 16031
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-298196OAI: diva2:945119
Educational program
Master Programme in Engineering Physics
Available from: 2016-06-30 Created: 2016-06-30 Last updated: 2016-06-30Bibliographically approved

Open Access in DiVA

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