Gelling behaviour of natural ester transformer liquid under thermal ageing

W. Lu; Q. Liu; Z. D. Wang

doi:10.1109/ICHVE.2012.6357101

Gelling behaviour of natural ester transformer liquid under thermal ageing

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120°C and 20°C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed. © 2012 IEEE.

Original language	English
Title of host publication	ICHVE 2012 - 2012 International Conference on High Voltage Engineering and Application\|ICHVE - Int. Conf. High Voltage Eng. Appl.
Pages	643-647
Number of pages	4
DOIs	https://doi.org/10.1109/ICHVE.2012.6357101
Publication status	Published - 2012
Event	2012 International Conference on High Voltage Engineering and Application, ICHVE 2012 - Shanghai Duration: 1 Jul 2012 → …

Conference

Conference	2012 International Conference on High Voltage Engineering and Application, ICHVE 2012
City	Shanghai
Period	1/07/12 → …

Keywords

acidity change
ageing
Aging
distribution transformers
environmental friendly properties
Films
free-breathing transformers
gelling speed
initial liquid phase
Liquids
natural ester transformer liquid gelling behaviour
oxidation
power transformers
susceptibility
temperature 20 degC
temperature 120 degC
Temperature measurement
thermal ageing
thin film gelling behaviour
thin films
thin film samples
traction transformers
transformer mineral oils
transformer oil
viscosity
viscosity change

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10.1109/ICHVE.2012.6357101

Cite this

@inproceedings{6f260a7f083a46859da7a851fe12e0bf,

title = "Gelling behaviour of natural ester transformer liquid under thermal ageing",

abstract = "There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120°C and 20°C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed. {\textcopyright} 2012 IEEE.",

keywords = "acidity change, ageing, Aging, distribution transformers, environmental friendly properties, Films, free-breathing transformers, gelling speed, initial liquid phase, Liquids, natural ester transformer liquid gelling behaviour, oxidation, power transformers, susceptibility, temperature 20 degC, temperature 120 degC, Temperature measurement, thermal ageing, thin film gelling behaviour, thin films, thin film samples, traction transformers, transformer mineral oils, transformer oil, viscosity, viscosity change",

author = "W. Lu and Q. Liu and Wang, {Z. D.}",

year = "2012",

doi = "10.1109/ICHVE.2012.6357101",

language = "English",

isbn = "9781467347464",

pages = "643--647",

booktitle = "ICHVE 2012 - 2012 International Conference on High Voltage Engineering and Application|ICHVE - Int. Conf. High Voltage Eng. Appl.",

note = "2012 International Conference on High Voltage Engineering and Application, ICHVE 2012 ; Conference date: 01-07-2012",

}

Lu, W, Liu, Q & Wang, ZD 2012, Gelling behaviour of natural ester transformer liquid under thermal ageing. in ICHVE 2012 - 2012 International Conference on High Voltage Engineering and Application|ICHVE - Int. Conf. High Voltage Eng. Appl.. pp. 643-647, 2012 International Conference on High Voltage Engineering and Application, ICHVE 2012, Shanghai, 1/07/12. https://doi.org/10.1109/ICHVE.2012.6357101

TY - GEN

T1 - Gelling behaviour of natural ester transformer liquid under thermal ageing

AU - Lu, W.

AU - Liu, Q.

AU - Wang, Z. D.

PY - 2012

Y1 - 2012

N2 - There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120°C and 20°C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed. © 2012 IEEE.

AB - There have been increasing interests on natural esters as potential substitutes to conventional mineral oils in transformers, due to their less-flammable, non-toxic and environmentally friendly properties. The application has been successful in traction and distribution transformers with sealed type. But the susceptibility to oxidation and hence the suspected gelling behaviour prevent the application of natural esters in free-breathing transformers. This paper presents an experimental study of gelling/oxidation behaviour of thin films of a natural ester under thermal ageing. Ageing experiments were carried out with presence of air at different temperatures of 120°C and 20°C and durations up to 2 years. The gelling/oxidation behaviour of natural ester was evaluated in terms of changes in viscosity and acidity. Results showed that both viscosity and acidity can be used to assess gelling/oxidation behaviour of natural ester from initial liquid phase to eventually gelled form. In addition to temperature, the thickness of the thin film samples has a significant effect on the gelling speed, i.e. the thinner of the film, the faster of the gelling speed. © 2012 IEEE.

KW - acidity change

KW - ageing

KW - Aging

KW - distribution transformers

KW - environmental friendly properties

KW - Films

KW - free-breathing transformers

KW - gelling speed

KW - initial liquid phase

KW - Liquids

KW - natural ester transformer liquid gelling behaviour

KW - oxidation

KW - power transformers

KW - susceptibility

KW - temperature 20 degC

KW - temperature 120 degC

KW - Temperature measurement

KW - thermal ageing

KW - thin film gelling behaviour

KW - thin films

KW - thin film samples

KW - traction transformers

KW - transformer mineral oils

KW - transformer oil

KW - viscosity

KW - viscosity change

U2 - 10.1109/ICHVE.2012.6357101

DO - 10.1109/ICHVE.2012.6357101

M3 - Conference contribution

SN - 9781467347464

SP - 643

EP - 647

BT - ICHVE 2012 - 2012 International Conference on High Voltage Engineering and Application|ICHVE - Int. Conf. High Voltage Eng. Appl.

T2 - 2012 International Conference on High Voltage Engineering and Application, ICHVE 2012

Y2 - 1 July 2012

ER -

Gelling behaviour of natural ester transformer liquid under thermal ageing

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