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 proceedingConference 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 languageEnglish
Title of host publicationhost publication
Subtitle of host publicationXVII International Symposium on High Voltage Engineering
PublisherSpringer Nature
Publication statusPublished - 2011
EventInternational Symposium on High Voltage Engineering, Hannover - Hannover
Duration: 22 Aug 201126 Aug 2011

Conference

ConferenceInternational Symposium on High Voltage Engineering, Hannover
CityHannover
Period22/08/1126/08/11

Keywords

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

Fingerprint

Dive into the research topics of 'Transmission transformer end-of-life modelling: incorporating insulating paper's thermal lifetime analysis with ordinary statistical analysis'. Together they form a unique fingerprint.

Cite this