Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors

Power transformers are critical components in a power system network, and they are subjected to multifactorial stresses. Regular performance assessments are conducted, and the Health Index (HI) technique is sometimes adopted. HI integrates field test results into a single index representing the over...

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Main Authors: Ying-Chan, C., Nallagownden, P., Nor, N.M.
Format: Conference or Workshop Item
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.29216 /
Published: Institute of Electrical and Electronics Engineers Inc. 2021
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124133457&doi=10.1109%2fICIAS49414.2021.9642518&partnerID=40&md5=c228d3502541ee1ffadde7a37a00364c
http://eprints.utp.edu.my/29216/
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spelling utp-eprints.292162022-03-25T01:12:00Z Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors Ying-Chan, C. Nallagownden, P. Nor, N.M. Power transformers are critical components in a power system network, and they are subjected to multifactorial stresses. Regular performance assessments are conducted, and the Health Index (HI) technique is sometimes adopted. HI integrates field test results into a single index representing the overall health. Existing Transformer HI (THI) models do not consider electrical and environmental factors unique to oil and gas facilities. Exclusion of operating history and failure data analysis affects the accuracy of the models. A pilot study was conducted using 4 existing THI models to investigate the accuracy of the THI scores in depicting the actual condition of a failed transformer installed in a gas processing plant. 2 models with 24 and 15 input parameters successfully indicated a significant deterioration within the transformer. Nevertheless, a final 'Fair' score would not trigger urgent intervention. With evidences that similar failure has occurred repeatedly across the facilities, the relevant field tests could have been included as dedicated input parameters to produce a more precise THI score. Another 2 models with less than 4 input parameters, placed the failing transformer in 'Very Good' band, which was totally erroneous. To design an accurate THI model, it is essential to consider specific load characteristics and environment factors by applying actual failure probability as basis. © 2021 IEEE. Institute of Electrical and Electronics Engineers Inc. 2021 Conference or Workshop Item NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124133457&doi=10.1109%2fICIAS49414.2021.9642518&partnerID=40&md5=c228d3502541ee1ffadde7a37a00364c Ying-Chan, C. and Nallagownden, P. and Nor, N.M. (2021) Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors. In: UNSPECIFIED. http://eprints.utp.edu.my/29216/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Power transformers are critical components in a power system network, and they are subjected to multifactorial stresses. Regular performance assessments are conducted, and the Health Index (HI) technique is sometimes adopted. HI integrates field test results into a single index representing the overall health. Existing Transformer HI (THI) models do not consider electrical and environmental factors unique to oil and gas facilities. Exclusion of operating history and failure data analysis affects the accuracy of the models. A pilot study was conducted using 4 existing THI models to investigate the accuracy of the THI scores in depicting the actual condition of a failed transformer installed in a gas processing plant. 2 models with 24 and 15 input parameters successfully indicated a significant deterioration within the transformer. Nevertheless, a final 'Fair' score would not trigger urgent intervention. With evidences that similar failure has occurred repeatedly across the facilities, the relevant field tests could have been included as dedicated input parameters to produce a more precise THI score. Another 2 models with less than 4 input parameters, placed the failing transformer in 'Very Good' band, which was totally erroneous. To design an accurate THI model, it is essential to consider specific load characteristics and environment factors by applying actual failure probability as basis. © 2021 IEEE.
format Conference or Workshop Item
author Ying-Chan, C.
Nallagownden, P.
Nor, N.M.
spellingShingle Ying-Chan, C.
Nallagownden, P.
Nor, N.M.
Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
author_sort Ying-Chan, C.
title Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
title_short Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
title_full Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
title_fullStr Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
title_full_unstemmed Utility Based Performance Assessment of Oil-Filled Transformers Considering Specific Load Characteristics and Environmental Factors
title_sort utility based performance assessment of oil-filled transformers considering specific load characteristics and environmental factors
publisher Institute of Electrical and Electronics Engineers Inc.
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124133457&doi=10.1109%2fICIAS49414.2021.9642518&partnerID=40&md5=c228d3502541ee1ffadde7a37a00364c
http://eprints.utp.edu.my/29216/
_version_ 1741197206690463744
score 11.62408

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