Effect of Oil Regeneration on Improving Paper Conditions in a Distribution TransformerCitation formats

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Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer. / Liu, Qiang; Venkatasubramanian, Ramamoorthi; Matharage, Shanika; Wang, Zhongdong.

In: Energies, Vol. 12, No. 9, 2019, p. 1665.

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@article{900518b7fc3b4655b27d11d8acf9e931,
title = "Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer",
abstract = "Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can help extend the useful lifetime of a transformer. Oil regeneration is one of such techniques. In this paper, oil regeneration experiments were performed on a 6.4/0.4 kV retired distribution transformer to investigate the effect of oil regeneration on improving paper conditions. Oil regeneration was conducted in two stages, with the first stage aimed at ‘cleaning the oil’ and the second stage targeted at ‘cleaning the paper’. Oil samples were collected at regular intervals throughout the process and paper samples were obtained from the transformer before and after each oil regeneration stage. It was found that oil regeneration restores oil parameters, including moisture and acidity, similar to those of new oils at the end of stage 1. Analysis of paper samples indicated a reduction in paper moisture at the end of stage 2 by nearly 40{\%}, while low molecular weight acids (LMA) in paper exhibited a reduction by around 30{\%} on average. It is found that the extended oil regeneration period, i.e., stage 2, is necessary to improve the paper condition and hence to reduce the paper ageing rate.",
keywords = "transformer, oil, regeneration, reclamation, asset management, ageing, paper",
author = "Qiang Liu and Ramamoorthi Venkatasubramanian and Shanika Matharage and Zhongdong Wang",
year = "2019",
doi = "10.3390/en12091665",
language = "English",
volume = "12",
pages = "1665",
journal = "Energies",
issn = "1996-1073",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "9",

}

RIS

TY - JOUR

T1 - Effect of Oil Regeneration on Improving Paper Conditions in a Distribution Transformer

AU - Liu, Qiang

AU - Venkatasubramanian, Ramamoorthi

AU - Matharage, Shanika

AU - Wang, Zhongdong

PY - 2019

Y1 - 2019

N2 - Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can help extend the useful lifetime of a transformer. Oil regeneration is one of such techniques. In this paper, oil regeneration experiments were performed on a 6.4/0.4 kV retired distribution transformer to investigate the effect of oil regeneration on improving paper conditions. Oil regeneration was conducted in two stages, with the first stage aimed at ‘cleaning the oil’ and the second stage targeted at ‘cleaning the paper’. Oil samples were collected at regular intervals throughout the process and paper samples were obtained from the transformer before and after each oil regeneration stage. It was found that oil regeneration restores oil parameters, including moisture and acidity, similar to those of new oils at the end of stage 1. Analysis of paper samples indicated a reduction in paper moisture at the end of stage 2 by nearly 40%, while low molecular weight acids (LMA) in paper exhibited a reduction by around 30% on average. It is found that the extended oil regeneration period, i.e., stage 2, is necessary to improve the paper condition and hence to reduce the paper ageing rate.

AB - Managing a large fleet of ageing assets has become a technical challenge faced by many electricity utilities in developed countries. Asset managers are increasingly interested in techniques that can help extend the useful lifetime of a transformer. Oil regeneration is one of such techniques. In this paper, oil regeneration experiments were performed on a 6.4/0.4 kV retired distribution transformer to investigate the effect of oil regeneration on improving paper conditions. Oil regeneration was conducted in two stages, with the first stage aimed at ‘cleaning the oil’ and the second stage targeted at ‘cleaning the paper’. Oil samples were collected at regular intervals throughout the process and paper samples were obtained from the transformer before and after each oil regeneration stage. It was found that oil regeneration restores oil parameters, including moisture and acidity, similar to those of new oils at the end of stage 1. Analysis of paper samples indicated a reduction in paper moisture at the end of stage 2 by nearly 40%, while low molecular weight acids (LMA) in paper exhibited a reduction by around 30% on average. It is found that the extended oil regeneration period, i.e., stage 2, is necessary to improve the paper condition and hence to reduce the paper ageing rate.

KW - transformer

KW - oil

KW - regeneration

KW - reclamation

KW - asset management

KW - ageing

KW - paper

U2 - 10.3390/en12091665

DO - 10.3390/en12091665

M3 - Article

VL - 12

SP - 1665

JO - Energies

JF - Energies

SN - 1996-1073

IS - 9

ER -