Investigating and calculating the temperature of hot-spot factor for transformers
Indonesian Journal of Electrical Engineering and Computer Science, vol.30, no.3, pp.1297-1307, 2023 (Scopus)
- Publication Type: Article / Article
- Volume: 30 Issue: 3
- Publication Date: 2023
- Doi Number: 10.11591/ijeecs.v30.i3.pp1297-1307
- Journal Name: Indonesian Journal of Electrical Engineering and Computer Science
- Journal Indexes: Scopus
- Page Numbers: pp.1297-1307
- Keywords: Distribution transformer, Tehrmal-electrical metaphor, Temperature loss, Thermal resistance, Transient states
- Open Archive Collection: AVESIS Open Access Collection
- Istanbul Gelisim University Affiliated: Yes
Abstract
This article explores the measurement of temperature in transient states, utilizing the principles of heat transfer and thermal-electrical metaphor. The study focuses on the nonlinear thermal resistances present in various locations within a distribution transformer, while taking into account variations in oil physical variables and temperature loss. Real-time data obtained from heat run tests on a 250-MVA-ONAF cooled unit, conducted by the transformer manufacturer, is used to verify the thermal designs. The observations are then compared to the loading framework of the IEC 60076-7:2005 system. The findings of this research provide a better understanding of temperature measurement in transient states, particularly in distribution transformers, and can be applied to the design and development of more efficient and reliable transformer systems.