Results 11 to 20 of about 350,104 (214)

Sweep frequency response analysis (SFRA) for the assessment of winding displacements and deformation in power transformers

Electric Power Systems Research, 2008
The sweep frequency response analysis (SFRA) is an analysis technique for detecting winding displacement and deformation (among other mechanical and electrical failures) on power and distribution transformers. Nowadays, there is an increasing interest in SFRA method because of its sensibility in detecting mechanical faults without opening the unit ...
Secue, Janneth R., Mombello, Enrique Esteban   +1 more
semanticscholar   +5 more sources

Interpretation of sweep frequency response analysis traces on inter-turn short circuit fault

International Journal of Power Electronics and Drive Systems (IJPEDS), 2020
Sweep frequency response analysis (SFRA) is a reliable method for detection and diagnosis of faults in the active part of transformers. However, although SFRA is widely employed, the interpretation of SFRA signature is still a challenge and require experts to analyse them.
Nurul Farahwahida Md Yasid, A. A. Alawady, M. F. M. Yousof, S. Al-Ameri, M. S. Kamarudin   +4 more
openaire   +3 more sources

Comparison of Impulse Wave and Sweep Frequency Response Analysis Methods for Diagnosis of Transformer Winding Faults [PDF]

Energies, 2017
Monitoring of winding faults is the most important item used to determine the maintenance status of a transformer. Commonly used methods for winding-fault diagnosis require the transformer to exit operation before testing and an external exciting signal, whether the transformer is malfunctioning or not. However, if an overvoltage signal can be regarded
Qing Yang, Peiyu Su, Yong Chen
openaire   +2 more sources

The application of sweep frequency response analysis for the online monitoring of power transformers

2016 Australasian Universities Power Engineering Conference (AUPEC), 2016
Frequency response analysis (FRA) is a technique used to diagnose the mechanical integrity of a transformer winding; such diagnostic tools can be of enormous value since power transformers are a critical asset within any electrical network. To minimize the probability of an unexpected outage, or prevent a catastrophic failure, maintenance and ...
Hossein Rahimpour, Steve Mitchell, Joe Tusek   +2 more
openaire   +3 more sources

SWEEP FREQUENCY RESPONSE ANALYSIS UNTUK ANALISIS AWAL GANGGUAN MEKANIS PADA TRANSFORMATOR DISTRIBUSI

Jetri : Jurnal Ilmiah Teknik Elektro, 2017
Sweep Frequency Response Analysis (SFRA) is a sensitive diagnosis technique to detect and to find out changes in the characteristic of distribution transformer winding by injecting low voltage at the specified frequency range. The changes can be due to electrical damage or mechanical disturbance such as during transportation, earth quake, and short ...
Dimas Fathoni, Chairul Gagarin Irianto
openaire   +2 more sources

Condition Monitoring of Distribution Transformer's Mechanical Parts Using Sweep Frequency Response Analysis (SFRA)

Procedia Engineering, 2013
AbstractDistribution transformer is the key element in the electricity transmission throughout the nation. Hence, serious attention for the transformer condition monitoring is a crucial. With an occurrence of short-circuit in the power system, the transformer active parts such as core and winding will experience a mechanical movement created by the ...
Ghani, Sharin Ab, Thayoob, Yasmin Hanum Md, Ghazali, Young Zaidey Yang, Khiar, Mohd Shahril Ahmad, Chairul, Imran Sutan   +4 more
openaire   +2 more sources

Evaluasi Kondisi Belitan Generator Transformers (GT) Dengan Sweep Frequency Response Analysis

RELE (Rekayasa Elektrikal dan Energi) : Jurnal Teknik Elektro, 2022
openaire   +2 more sources

Dynamic response of Blue Honeysuckle fruit-stem system based on mathematical model. [PDF]

PLoS ONE
To investigate the motion and detachment behavior of Blue Honeysuckle fruit during vibratory harvesting, the fruit-bearing branch was modeled as a constant strength beam, and an analytical series solution for its dynamic response was derived.
Yuan Wei, Wang Ruiyin, Wang Yecheng, Feng Fang, Ma Decai   +4 more
doaj   +2 more sources

Multi-Point Interaction of Partially Conductive Cracks with Sweep Frequency Eddy Currents in Electromagnetic Non-Destructive Evaluation

Applied Sciences, 2022
An investigation of real corrosion cracks that can be partially conductive in electromagnetic non-destructive evaluation using sweep-frequency eddy-current frequency-response analysis is carried out in this study.
Milan Smetana, Daniela Gombarska, Ladislav Janousek, Filip Vaverka   +3 more
doaj   +1 more source

Diagnosis of Artificial Flaws from Eddy Current Testing Signals Based on Sweep Frequency Non-Destructive Evaluation

Applied Sciences, 2022
An investigation of artificial flaws in electromagnetic non-destructive evaluation using eddy-current frequency-response analysis is carried out in this study. A new approach incorporating innovative solution is proposed.
Filip Vaverka, Milan Smetana, Daniela Gombarska, Ladislav Janousek   +3 more
doaj   +1 more source