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Influence of Paper Ageing on Transformer Failure

February 9, 2020February 9, 2020 - by The University of Manchester - Leave a Comment

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 …

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Analysing the Power Transformer Temperature Limitation for Avoidance of Bubble Formation

February 9, 2020February 10, 2020 - by The University of Manchester - Leave a Comment

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 …

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Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

September 19, 2019September 20, 2019 - by The University of Manchester - Leave a Comment

  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 …

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Classification of Transformer Windings Types Using Frequency Response Analysis by Machine Learning Method

June 22, 2019June 22, 2019 - by The University of Manchester - Leave a Comment

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 …

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Transformer Related Post Graduate Research Training at the University of Queensland (UQ)

June 22, 2019June 22, 2019 - by The University of Queensland - Leave a Comment

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 …

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Interpreting First Anti-Resonance of FRA Responses through Low Frequency Transformer Modelling

June 22, 2019June 22, 2019 - by The University of Manchester - Leave a Comment

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 …

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Magic to visualise the invisible: a comparison on the optical methods to visualise streamers in insulating liquids

June 19, 2019June 22, 2019 - by The University of Manchester - Leave a Comment

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 …

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Beat the Detection Limit of Partial Discharge Acoustic Emission within Transformer by the Use of Fiber Optic Sensor

June 17, 2019June 19, 2019 - by Xi’an Jiaotong University - Leave a Comment

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 …

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Investigation on Vibration Generation and Transmission Characteristics in Power Transformers

June 17, 2019June 19, 2019 - by Xi’an Jiaotong University - Leave a Comment

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 …

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Liquid Flow Distribution in Oil Directed Cooled Disc Type Transformer Windings

May 11, 2019June 18, 2019 - by The University of Manchester - Leave a Comment

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 …

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News

  • Questionnaire from CIGRE Working Group A2.62 (Analysis of AC Transformer Reliability)
    September 2, 2020
  • UTRA Webinar on Transformer Life Extension through Oil Regeneration Conducted by The University of Manchester
    May 5, 2020
  • “Energies” special issue “Power Transformer Condition Assessment” with Professor Stefan Tenbohlen as the guest editor
    March 31, 2020

Recent Technical Posts

  • Influence of Paper Ageing on Transformer Failure
  • Analysing the Power Transformer Temperature Limitation for Avoidance of Bubble Formation
  • Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

Most Used Tags

2-FAL disc type windings ester methanol oil directed paper ageing partial discharge streamer Thermal modelling transformer vibration

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