Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis

D. Y. Feng; W. Wu; Z.D. Wang; P. Jarman

Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis

D. Y. Feng, W. Wu, Z.D. Wang, P. Jarman

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

19 Downloads (Pure)

Abstract

Intensive statistical analysis on the UK transmission transformer’s historical reliability data has confirmed a constant hazard of 0.27%. However the hazard at older ages cannot be accurately predicted due to the lack of older transformers operating in the system. 77 scrapped transformers’ thermal lifetimes are assessed to assist the statistical approaches by assuming transformer’s lifetime equals to its insulating paper’s thermal lifetime. To improve the statistical significance, the life samples are further enlarged by transformer thermal modelling. The enlarged sample contains 158 transformers and yields a median thermal lifetime of 95 years.

Original language	English
Title of host publication	host publication
Subtitle of host publication	XVII International Symposium on High Voltage Engineering
Publisher	Springer Nature
Publication status	Published - 2011
Event	International Symposium on High Voltage Engineering, Hannover - Hannover Duration: 22 Aug 2011 → 26 Aug 2011

Conference

Conference	International Symposium on High Voltage Engineering, Hannover
City	Hannover
Period	22/08/11 → 26/08/11

Keywords

Power transformer, statistical analysis, thermal model, degree of polymerization

Access to Document

FULL-TEXT

Cite this

@inproceedings{672726110d5541368df2eab517a0d6ea,

title = "Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis",

abstract = "Intensive statistical analysis on the UK transmission transformer{\textquoteright}s historical reliability data has confirmed a constant hazard of 0.27%. However the hazard at older ages cannot be accurately predicted due to the lack of older transformers operating in the system. 77 scrapped transformers{\textquoteright} thermal lifetimes are assessed to assist the statistical approaches by assuming transformer{\textquoteright}s lifetime equals to its insulating paper{\textquoteright}s thermal lifetime. To improve the statistical significance, the life samples are further enlarged by transformer thermal modelling. The enlarged sample contains 158 transformers and yields a median thermal lifetime of 95 years.",

keywords = "Power transformer, statistical analysis, thermal model, degree of polymerization",

author = "Feng, {D. Y.} and W. Wu and Z.D. Wang and P. Jarman",

year = "2011",

language = "English",

booktitle = "host publication",

publisher = "Springer Nature",

address = "United States",

note = "International Symposium on High Voltage Engineering, Hannover ; Conference date: 22-08-2011 Through 26-08-2011",

}

Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis. / Feng, D. Y.; Wu, W.; Wang, Z.D. et al.

host publication: XVII International Symposium on High Voltage Engineering. Springer Nature, 2011.

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

TY - GEN

T1 - Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis

AU - Feng, D. Y.

AU - Wu, W.

AU - Wang, Z.D.

AU - Jarman, P.

PY - 2011

Y1 - 2011

N2 - Intensive statistical analysis on the UK transmission transformer’s historical reliability data has confirmed a constant hazard of 0.27%. However the hazard at older ages cannot be accurately predicted due to the lack of older transformers operating in the system. 77 scrapped transformers’ thermal lifetimes are assessed to assist the statistical approaches by assuming transformer’s lifetime equals to its insulating paper’s thermal lifetime. To improve the statistical significance, the life samples are further enlarged by transformer thermal modelling. The enlarged sample contains 158 transformers and yields a median thermal lifetime of 95 years.

AB - Intensive statistical analysis on the UK transmission transformer’s historical reliability data has confirmed a constant hazard of 0.27%. However the hazard at older ages cannot be accurately predicted due to the lack of older transformers operating in the system. 77 scrapped transformers’ thermal lifetimes are assessed to assist the statistical approaches by assuming transformer’s lifetime equals to its insulating paper’s thermal lifetime. To improve the statistical significance, the life samples are further enlarged by transformer thermal modelling. The enlarged sample contains 158 transformers and yields a median thermal lifetime of 95 years.

KW - Power transformer, statistical analysis, thermal model, degree of polymerization

M3 - Conference contribution

BT - host publication

PB - Springer Nature

T2 - International Symposium on High Voltage Engineering, Hannover

Y2 - 22 August 2011 through 26 August 2011

ER -

Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis

Abstract

Conference

Keywords

Access to Document

Fingerprint

Cite this