Elixir Online Journal

CATEGORIES

Architecture and Design

Cement and Concrete Composites Historic Preservation Sustainable Architecture

Arts and Social Science

Literature Linguistics and Translation Social Science

Biomedical and Life Sciences

Applied Botany Applied Biology Aquaculture Bio-Physics Bio Technology Food Science Hormones and Signaling Semen Dilution and Freezing Biomedical Science and Technology

Business Administration, Management and Economics

Finance Management International Business Management Human Resource Management Marketing Management Management Arts Production Management Tourism Management Project Management

Chemistry and Materials Science

Applied Chemistry Chemical Physics Computational Chemistry Corrosion Chemical Physics Letters Organic Chemistry Optical Materials Nanocomposite Materials Semiconductor Materials Nanotechnology Liquid Crystal Technology Dye Chemistry Magnetic Materials

Discrete Mathematics and Cryptography

Applied Mathematics Cryptology Discrete Mathematics Statistics Advances in Pure Mathematics

Earth and Environmental Science

Agriculture Bio-Diversity Pollution Remote Sensing Meteorology Geoscience Infrastructure Management Horticultural Science

Engineering

Advanced Engineering Informatics Adoc Network Chemical Engineering Control Engineering Electrical Engineering Computer Science and Engineering Mechanical Engineering Network Engineering Power Electronics Engineering Thermal Engineering Nanosensors Image Processing Renewable Energy Engineering

Education

Educational Technology Leadership Management Psychology Social Studies Mathematics Education

Humanities and Law

Criminal Law International Law

Medical Science

Human-Physiology Pharmacy Virus Research Dentistry Forensic Serology

Physics and Astronomy

Advanced Powder Technology Crystal Growth Crystal Research Technology Polymer Space Science Vibrational Spectroscopy Ultrasonics Thin Film Technology Nuclear and Radiation Physics

Short Communication

Comments Criticism

Announcement

Editor-in-Chief

ISSUE

Current Issues

May2013

Past Issues

April 2013
March 2013
February 2013
January 2013
2012
2011

Frequency response analysis using high frequency transformer model

Author:A.Abu Siada

Abstract:
The concept of Frequency Response Analysis (FRA) has been successfully used as a diagnostic technique to detect winding deformation, core and clamping structure for power transformers. The main problem about FRA techniques is to interpret the observed evolution of the frequency response in order to identify failures. Transformer high frequency computer modeling is proposed in this work to be used with the practical FRA measurements. The physical meaning of the model parameters allows the identification of the problem inside the transformer. Two high frequency transformer models based on lumped and distributed parameters approaches are investigated. A comparison of both models is conducted using their transfer function plots, and hence based on the amount of information revealed from the plots, a distributed model is chosen for further analysis. The model validation is carried out through the comparison of the simulation and field results. Mechanical and short circuit faults are simulated into the model to compare the differences in the frequency response of healthy and deformed transformer signatures. The advantage of this technique is that the FRA measurements can be obtained from meaningful parameters that can aid interpretation and classification of FRA signatures.