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 MoreTechnical Posts
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 MoreTransformer Related Post Graduate Research Training at the University of Queensland (UQ)
At the University of Queensland we have always focused on higher degree research training. In the recent past, a number of our students have graduated with their PhDs and MPhils …
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 MoreBeat the Detection Limit of Partial Discharge Acoustic Emission within Transformer by the Use of Fiber Optic Sensor
Partial discharge (PD) detection is commonly used for power transformer diagnosis. During PD process, electromagnetic emission, acoustic emission and optical emission can be detected, associated with chemical traces left simultaneously …
Read MoreInvestigation on Vibration Generation and Transmission Characteristics in Power Transformers
Introduction Transformer tank vibration mainly originates from the core and windings vibration, and they can be easily acquired. Therefore, the vibroacoustic signals of a transformer tank are widely adopted to …
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 More