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Related Concept Videos

Insulation Coordination01:23

Insulation Coordination

Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times for...
Energy Losses in Transformers01:21

Energy Losses in Transformers

In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality,  the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
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Equivalent Circuits for Practical Transformers01:28

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Related Experiment Video

Updated: Jul 9, 2026

Comparative Study of Simulation of Temperature Rise in Ring Main Unit
04:35

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Published on: July 5, 2024

Insulation failure mapping on power transformer bushing using FRA and electrostatic simulation.

Salem Mgammal Al-Ameri1, Waleed M Hamanah1, Ali Ahmed Salem1

  • 1Interdisciplinary Research Center for Sustainable Energy Systems, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.

Plos One
|July 7, 2026
PubMed
Summary
This summary is machine-generated.

This study maps power transformer bushing failure mechanisms using electrical and Multiphysics analysis. It identifies distinctive frequency response analysis (FRA) signatures for insulation degradation, pollution, and damage, enabling early fault detection.

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Physics

Background:

  • Power transformer bushings are critical insulation components prone to failure.
  • Failures in bushings can lead to significant transformer downtime and operational issues.

Purpose of the Study:

  • To develop a framework for mapping failure mechanisms in Resin-Impregnated Paper (RIP) transformer bushings.
  • To enable early fault detection and improve maintenance strategies for transformer bushings.

Main Methods:

  • Combined electrical and Multiphysics approaches were utilized.
  • Frequency Response Analysis (FRA) and electrostatic analysis were employed.
  • MATLAB-based equivalent circuit modeling and COMSOL Multiphysics simulations were performed.

Main Results:

  • Distinctive FRA signatures were identified for insulation degradation, surface pollution, and insulator damage.
  • Electric field and potential distributions provided physical insight into failure mechanisms.
  • The study successfully mapped failure modes through their unique FRA characteristics.

Conclusions:

  • The developed framework enhances understanding of transformer bushing failure behaviors.
  • Early fault detection in transformer bushings is achievable through the proposed methods.
  • Improved condition monitoring and maintenance of transformer bushings are facilitated.