Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI

Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI

The power transformer is a major part of an electric system, it is necessary to know their condition in order to solve incipient faults, DGA technique in mineral insulating oil is widely used to diagnose the equipment, however, is not easy to interpret the results because it is hard to know the seve...

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Autores principales: Gutiérrez Chávez, Bethsaida Adriana, Montes de Oca-Ramírez, Georgina
Formato: Online
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Publicado: Universidad Autónoma de Baja California 2021
Acceso en línea:https://recit.uabc.mx/index.php/revista/article/view/138
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spelling recit-article-1382022-10-26T18:31:50Z Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI Determinación de fallas en transformadores de potencia inmersos en aceite mineral aislante basándose exclusivamente en el DGA y mediante la evaluación del NEI Gutiérrez Chávez, Bethsaida Adriana Montes de Oca-Ramírez, Georgina Power transformer Mineral insulating oil Dissolved gas analysis (DGA) Normalized energy intensity (NEI) Enthalpy Transformador de potencia Aceite mineral aislante Análisis de gases disueltos (DGA) Intensidad energética normalizada (NEI) Entalpía The power transformer is a major part of an electric system, it is necessary to know their condition in order to solve incipient faults, DGA technique in mineral insulating oil is widely used to diagnose the equipment, however, is not easy to interpret the results because it is hard to know the severity of the detected fault. Recent studies mention a way to evaluate it called “Normalized Energy Intensity” (Jakob & Dukarm, 2015) which incorporates the thermodynamic theory to the decomposition of mineral insulated oil. In this article, the analysis of 24 power transformers operating under different conditions was considered to do a comparative study between Dissolved Gas Analysis and Normalized Energy Intensity interpretation techniques in order to evaluate the severity of the detected faults. The obtained result was a more accurate diagnosis of the transformers before presenting major failures. It was determined that the interpretative technique NEI is more sensitive to DGA, allowing that the quantification of the transformer fault severity to be closer to the insulated mineral oil real condition degradation. Los transformadores de potencia son un componente importante de las redes eléctricas, por lo que resulta necesario conocer su estado a fin de dar solución a las fallas incipientes. La técnica Análisis de Gases Disueltos (DGA) es ampliamente utilizada para el diagnóstico de fallas de estos equipos, sin embargo, los resultados no son concluyentes ya que no se conoce con exactitud la severidad de las fallas detectadas. En estudios recientes se reporta una manera de evaluación “Normalized Energy Intensity (NEI)” (Jakob & Dukarm, 2015), la cual incorpora la teoría termodinámica a la degradación del aceite mineral. En este artículo se realiza el análisis de 24 transformadores de potencia que operan bajo distintas condiciones, realizando una evaluación comparativa de las técnicas de interpretación DGA y NEI para evaluar la severidad de las fallas detectadas. El resultado obtenido fue un diagnóstico más certero de los transformadores previo a presentar fallas mayores. Se determinó que la técnica interpretativa NEI es más sensible al DGA, permitiendo que la cuantificación de la severidad de la falla del transformador sea más aproximada al estado real de la degradación de aceite mineral aislante.  Universidad Autónoma de Baja California 2021-09-27 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html text/xml https://recit.uabc.mx/index.php/revista/article/view/138 10.37636/recit.v43208223 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 No. 3 (2021): July-September; 208-223 REVISTA DE CIENCIAS TECNOLÓGICAS; Vol. 4 Núm. 3 (2021): Julio-Septiembre; 208-223 2594-1925 spa https://recit.uabc.mx/index.php/revista/article/view/138/288 https://recit.uabc.mx/index.php/revista/article/view/138/289 https://recit.uabc.mx/index.php/revista/article/view/138/290 Copyright (c) 2021 Bethsaida Adriana Gutiérrez Chávez, Georgina Montes de Oca-Ramírez https://creativecommons.org/licenses/by/4.0
institution RECIT
collection OJS
language spa
format Online
author Gutiérrez Chávez, Bethsaida Adriana
Montes de Oca-Ramírez, Georgina
spellingShingle Gutiérrez Chávez, Bethsaida Adriana
Montes de Oca-Ramírez, Georgina
Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
author_facet Gutiérrez Chávez, Bethsaida Adriana
Montes de Oca-Ramírez, Georgina
author_sort Gutiérrez Chávez, Bethsaida Adriana
title Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
title_short Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
title_full Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
title_fullStr Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
title_full_unstemmed Determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the DGA and by evaluating the NEI
title_sort determination of faults severity in power transformers immersed in mineral insulated oil based exclusively on the dga and by evaluating the nei
description The power transformer is a major part of an electric system, it is necessary to know their condition in order to solve incipient faults, DGA technique in mineral insulating oil is widely used to diagnose the equipment, however, is not easy to interpret the results because it is hard to know the severity of the detected fault. Recent studies mention a way to evaluate it called “Normalized Energy Intensity” (Jakob & Dukarm, 2015) which incorporates the thermodynamic theory to the decomposition of mineral insulated oil. In this article, the analysis of 24 power transformers operating under different conditions was considered to do a comparative study between Dissolved Gas Analysis and Normalized Energy Intensity interpretation techniques in order to evaluate the severity of the detected faults. The obtained result was a more accurate diagnosis of the transformers before presenting major failures. It was determined that the interpretative technique NEI is more sensitive to DGA, allowing that the quantification of the transformer fault severity to be closer to the insulated mineral oil real condition degradation.
publisher Universidad Autónoma de Baja California
publishDate 2021
url https://recit.uabc.mx/index.php/revista/article/view/138
_version_ 1792095341661650944

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