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dc.contributor.authorNaranpanawe, Lakshitha
dc.contributor.authorEkanayake, Chandima
dc.contributor.authorSaha, Tapan Kumar
dc.contributor.authorAnnamalai, Pratheep Kumar
dc.description.abstractShort circuit (SC) strength of a power transformer is influenced by its winding clamping pressure. The required level of clamping pressure is selected at the design stage based on the maximum allowable SC current level of the transformer. Progressive loss of clamping pressure is a common problem in power transformers. Shrinkage and fading of the stiffness of solid insulation due to thermal degradation are the most common causes of this problem. It has also been identified that changes in the moisture content and repetitive compression cycles on pressboard during high current faults tend to change the winding clamping pressure. This study aims to investigate the effects of moisture and compression cycles on winding clamping pressure through a set of laboratory experiments and finite element analyses. Thickness change and compressive stress-strain curves of pressboard were measured under different moisture conditions. The results were then used to calculate changes in winding geometry and clamping pressure of a 100 kVA three phase, disc type transformer winding.
dc.publisherIEEE - Institute of Electrical and Electronics Engineers
dc.relation.ispartofjournalIEEE Transactions on Dielectrics and Electrical Insulation
dc.subject.fieldofresearchElectrical and Electronic Engineering not elsewhere classified
dc.subject.fieldofresearchElectrical and Electronic Engineering
dc.titleInfluence of moisture dependency of pressboard on transformer winding clamping pressure
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.hasfulltextNo Full Text
gro.griffith.authorEkanayake, Chandima MB.

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