Results 171 to 180 of about 350,104 (214)

Core Magnetization Effect in Sweep Frequency Response Analysis for Transformer Diagnosis

2015 Second International Conference on Advances in Computing and Communication Engineering, 2015
Power transformer is one of the most prominent equipment in the area of power sector. Increasing power demand at world level requires manufacturing of large number of oil immersed power transformer. With increase in size and MVA rating of power transformer, the chances of failure also increases simultaneously.
Ambuj Kumar, Sunil Kumar Singh, Jagnandan Negi, Zakir Husain, R.K. Jarial   +4 more
openaire   +2 more sources

An Alternative Measurement Approach to Sweep Frequency Response Analysis (SFRA) for Power Transformers Fault Diagnosis

2019 54th International Universities Power Engineering Conference (UPEC), 2019
Power transformer failures can lead to power outages and significant financial loss, particularly at high voltage and medium voltage levels. Frequency response analysis (FRA) is used to diagnose transformer faults and particularly so for detecting mechanical displacements in windings and core.
Anurag A. Devadiga, Nouredine Harid, Huw Griffiths, Braham Barkat   +3 more
openaire   +2 more sources

Application of Sweep Frequency Response Analysis for the detection of winding faults in induction motor

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
The Sweep Frequency Response Analysis (SFRA) is one of the powerful graphical technique to detect and diagnosed different faults in transformer. This paper proposed novel approach for the detection of winding fault and constructional asymmetry in three phase induction motor (TPIM) using sweep frequency response analysis technique.
Tushar Gulabrao Vilhekar, Makarand Sudhakar Ballal, Bhimrao S. Umre   +2 more
openaire   +2 more sources

Using Cross-Correlation Coefficients to Analyze Transformer Sweep Frequency Response Analysis (SFRA) Traces

2007 IEEE Power Engineering Society Conference and Exposition in Africa - PowerAfrica, 2007
Sweep frequency response analysis (SFRA) is one of the most powerful diagnostic tools for assessing mechanical damage to a transformer winding. Analysis of the results, which are in the form of frequency response traces can, however, be daunting to new users. One approach is to attempt automated analysis, and this paper presents an approach using cross-
G.M. Kennedy, A.J. McGrail, J.A. Lapworth   +2 more
openaire   +2 more sources

Assessment of transformer core and winding conditions for distribution transformers using sweep frequency response analysis waveforms

AIP Conference Proceedings, 2015
Power transformer had been a major asset in any power utilities since the last millennium. Transformer mechanical integrity is among the important part to be ensured in good condition. An assessment for Sweep Frequency Response Analysis (SFRA) traces to determine internal transformer conditions is presented in this paper. Three standards are identified
Z. H. Bohari, M. F. Baharom, M. F. Sulaima, M. H. Jali, H. I. Jaafar, M. S. Jamri   +5 more
openaire   +2 more sources

An Approach for Identification of Inter-Turn Fault Location in Transformer Windings using Sweep Frequency Response Analysis

IEEE Power & Energy Society General Meeting, 2022
As inter-turn faults in transformer windings are the most severe, their delayed detection and localization may create extensive damage to the winding. Therefore, a new inter-turn fault localization methodology based on sweep frequency response analysis ...
Abhishek Kumar, B. Bhalja, G. Kumbhar
semanticscholar   +1 more source

Modeling and diagnostic transformer condition using Sweep Frequency Response Analysis

2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials, 2009
Many methods have been developed to justify the condition of power transformer; one of the newest and well known is by using Sweep Frequency Response Analysis techniques. The basic concept of this method is by injecting a constant-amplitude of sinusoidal signal under various frequencies (sweep).
A. P. Purnomoadi, D. Fransisco
openaire   +1 more source

A new technique for a better sweep frequency response analysis interpretation

2012 IEEE International Symposium on Electrical Insulation, 2012
This paper presents a new technique for a better and faster sweep frequency response analysis (SFRA) results' interpretation. The proposed technique is based on the time-frequency analysis. Unlike the Fourier transform (FT) which is a 1-dimensional representation, a time-frequency distribution (TFD) is a 2-dimensional representation where both time and
Esam Al Murawwi, Braham Barkat
openaire   +1 more source

Statistical evaluation of a new technique for Sweep Frequency Response Analysis

2012 IEEE International Conference on Power and Energy (PECon), 2012
This paper presents a statistical evaluation of a new technique for Sweep Frequency Response Analysis (SFRA). The new technique is based on the time-frequency distribution (TFD). Unlike the Fourier transform based (SFRA) which is a 1-dimensional representation, a TFD is a 2-dimensional representation where both time and frequency are present in one ...
Esam Al Murawwi, Braham Barkat, Redy Mardiana   +2 more
openaire   +1 more source

Improved Interpretation of Impulse Frequency Response Analysis for Synchronous Machine Using Life long Learning Based on iCaRL

IEEE Transactions on Instrumentation and Measurement, 2023
Winding inter-turn and ground short circuit (SC) faults are common fault types of synchronous machines. The sweep frequency response analysis (SFRA) has been recently introduced to detect winding SC faults.
Yu Chen, Zhongyong Zhao, Yueqiang Yu, Yunlong Guo, Chao Tang   +4 more
semanticscholar   +1 more source