Prediction of the Progressive Loss of Winding Clamping Pressure in Power Transformers
Joint Authors
Gao, Shuguo
Zhao, Jun
Meng, Lingming
Liu, Hongliang
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-18
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
This paper investigates the progressive loss of winding clamping pressure resulted from thermal aging in power transformers.
Firstly, out-of-plane stress-strain characteristics of aging pressboards are investigated experimentally and relationship between mechanical properties of pressboards and aging hours is established accordingly.
Then, a thermal-mechanical model is built to correlate the aging time with temperature based on the first-order reaction kinetics.
Based on the above investigations, the correlation between temperature and mechanical properties of pressboards is obtained and the progressive loss of clamping pressure is predicted.
The results show that with the progressive softening of pressboards from aging, the clamping pressure drops linearly under 60°C and nonlinearly over 60°C.
The remaining clamping pressure of a transformer winding with 30 years’ service history is only 80.12% and 51.59% of its initial pressure under 50°C and 60°C, respectively.
American Psychological Association (APA)
Gao, Shuguo& Zhao, Jun& Meng, Lingming& Liu, Hongliang. 2020. Prediction of the Progressive Loss of Winding Clamping Pressure in Power Transformers. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1196697
Modern Language Association (MLA)
Gao, Shuguo…[et al.]. Prediction of the Progressive Loss of Winding Clamping Pressure in Power Transformers. Mathematical Problems in Engineering No. 2020 (2020), pp.1-8.
https://search.emarefa.net/detail/BIM-1196697
American Medical Association (AMA)
Gao, Shuguo& Zhao, Jun& Meng, Lingming& Liu, Hongliang. Prediction of the Progressive Loss of Winding Clamping Pressure in Power Transformers. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-8.
https://search.emarefa.net/detail/BIM-1196697
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1196697