Title :
A Contribution to the Analysis of Frequency Response and Impedance Measurements to Evaluation and Diagnostic of Power Transformers
Author :
Martins, Helvio J A ; Urbani, Bruno ; de Faria Ferreira, C.
Author_Institution :
CEPEL - Brazilian Electr. Power Res. Center, Nova Iguacu, Brazil
Abstract :
This paper has an objective to show a developed quantitative criterion, based in two mathematical variables that explicit the deviation degree of a normal situation, applying simultaneously data from terminal impedances and frequency response. Based in more than 100-measured equipment, of different applications (step-up transformer, transmission transformer, etc.,), for a period of 10 years, the work presents some examples of practical application of this methodology in Brazilian Electrical System.
Keywords :
electric impedance measurement; frequency response; power transformers; Brazilian Electrical System; frequency response analysis; impedance measurements; power transformer diagnostics; quantitative criterion; Frequency response; Impedance measurement; Manufacturing; Pattern analysis; Power engineering and energy; Power transformer insulation; Power transformers; Rail transportation; Testing; Visual databases;
Conference_Titel :
High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-3823-5
Electronic_ISBN :
978-1-4244-2810-6
DOI :
10.1109/ICHVE.2008.4773998
