Although partial discharge (PD) measurement is a well-accepted technology to assess the quality of the insulation system of power transformers, there are still uncertainties about which frequency range PDs radiate …
Frequency Range of UHF PD Measurements in Power Transformers Read MoreThe electric field uniformity imposes a significant effect on the breakdown mechanisms of dielectric liquids. In general, breakdown is dominated by streamer initiation under uniform field, while it is dominated …
Effect of Electric Field Uniformity on Breakdown Mechanisms of Dielectric Liquids under Lightning Impulse Read MoreIn this paper, a reduced computational fluid dynamics (CFD) model is proposed for determining the total heat dissipation and the oil temperature distribution of transformer radiators in oil natural air …
A Reduced Radiator Model for Simplification of ONAN Transformer CFD Simulation Read MoreFrequency Response Analysis (FRA) is regarded as the most effective technique for detecting mechanical faults in transformer windings. However, the main challenge in applying the FRA technique lies in the …
Using Lumped Element Equivalent Network Model to Derive Analytical Equations for Interpretation of Transformer Frequency Responses Read MoreAgeing 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 …
Influence of Paper Ageing on Transformer Failure Read MoreIntroduction 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 …
Analysing the Power Transformer Temperature Limitation for Avoidance of Bubble Formation Read MoreManaging 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 …
Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer Read MoreA 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 …
Classification of Transformer Windings Types Using Frequency Response Analysis by Machine Learning Method Read MoreAt 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 …
Transformer Related Post Graduate Research Training at the University of Queensland (UQ) Read MoreIntroduction 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 …
Interpreting First Anti-Resonance of FRA Responses through Low Frequency Transformer Modelling Read More