Influence of Paper Ageing on Transformer Failure
Ageing of paper insulation is a key parameter which determines the end of life for transformers. Much research has been conducted in trying to establish where the end of life …
Read MoreAuthor: The University of Manchester
Analysing the Power Transformer Temperature Limitation for Avoidance of Bubble Formation
Introduction Power transformer insulation serves a vital purpose of providing dielectric protection to the transformer. Solid insulation is wrapped around the winding conductors, usually in thin layers. During service, winding …
Read MoreEffect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer
Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can …
Read MoreClassification of Transformer Windings Types Using Frequency Response Analysis by Machine Learning Method
A considerable amount of power transformers in operation do not own Original Equipment Manufacturer (OEM) technical support. It is desirable and feasible to obtain the related design information by interpreting …
Read MoreInterpreting First Anti-Resonance of FRA Responses through Low Frequency Transformer Modelling
Introduction The failure of transformers can result in safety issues and economic losses. Although FRA is widely used to detect mechanical winding deformation, the success of this technique lies in …
Read MoreMagic to visualise the invisible: a comparison on the optical methods to visualise streamers in insulating liquids
The prebreakdown and breakdown phenomenon in liquids is termed as ‘Streamer’. To better understand the mechanism of liquid breakdown, we need to have deep insights into the streamer process, which …
Read MoreLiquid Flow Distribution in Oil Directed Cooled Disc Type Transformer Windings
Determination and optimisation of the winding hot-spot temperature is essential for managing the loading capability and thermal ageing of transformers. The liquid flow in the various winding cooling ducts directly …
Read MoreAgeing Assessment of Non Thermally Upgraded Transformer Paper Insulation Impregnated with Synthetic Ester
The world’s first synthetic ester filled 400 kV, 240 MVA power transformer is to be connected to the UK transmission network, a great achievement in the perspective of going ‘green’ …
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