Thermal overload tests on a 400-MVA power transformer with a special 2.5-p.u. Short time loading capability

IEEE Transactions on Power Delivery

Volumn 18, Issue 1, 2003, Pages 107-112

  Nordman, Hasse ^a   Lahtinen, Matti ^b  

^a ABB OY   (Finland)

^b FINGRID OYJ   (Finland)

Author keywords

Eddy losses; Leakage flux; Overloading; Power transformer; Winding hot spot

Indexed keywords

EDDY CURRENTS; ELECTRIC LOSSES; ELECTRIC WINDINGS; FUNCTIONS; LEAKAGE CURRENTS; THERMAL LOAD;

POWER TRANSFORMERS;

ELECTRIC TRANSFORMERS;

EID: 0037250663     PISSN: 08858977     EISSN: None     Source Type: Journal    
DOI: 10.1109/TPWRD.2002.807747     Document Type: Article

References (7)

1. Loading Guide for Oil-Immersed Power Transformers, IEC 354, 1991.
2. IEEE Guide for Loading Mineral-Oil-Immersed Power Transformers Rated in Excess of 100 MVA (65 °C Winding Rise), vol. C57, IEEE, Piscataway, NJ, 1991.
3. "A survey of facts and opinions on the maximum safe operating temperature of power transformers under emergency conditions," Electra, CIGRÉ WG 12-09, vol. 129, 1990.
4. "Direct measurement of the hot-spot temperature of transformers," Electra, CIGRÉ WG 12-09, vol. 129, 1990.
5. L. W. Pierce, "An investigation of the thermal performance of an oil-filled transformer winding," IEEE Trans. Power Delivery., vol. 7, pp. 1347-1358, July 1992.
6. W. Lampe, L. Pettersson, C. Ovren, and B. Wahlstrom, "Hot-spot measurements in power transformers," CIGRÉ, Rep. 12-02, 1984.
7. H. P. Schad and P. Boss, "Faseroptische messung des temperaturprofils einer transformatormodellspule," Bulletin des Schweizerischen Elektrotechnischen Vereins SEV/VSE, vol. 80, pp. 377-379, Apr. 1989.