An Improved Thermal Model for Power Transformers with Dynamic Loading

Author

Tan, Li ; Li, Hualong ; Yan, Xiaohui ; Tian, Jun ; Li, Jiangtao

Author_Institution

Sch. of Electr. Eng., Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2012

fDate

27-29 March 2012

Firstpage

1

Lastpage

4

Abstract

This paper proposed an improved thermal-circuit model for power transformer hot-spot temperature prediction with dynamic loading. The influences of solar radiation and the environmental temperature on the heat dissipation were also considered. When calculating the heat dissipation from the transformer tank to surroundings, the average oil temperature was selected as the node value in the thermal circuit. The new thermal models will be validated with the delivery experimental data of a 220kV-300MVA unit and a 220kV-75MVA unit.

Keywords

cooling; power transformer insulation; sunlight; transformer oil; apparent power 300 MVA; apparent power 75 MVA; average oil temperature; dynamic loading; environmental temperature; heat dissipation; improved thermal-circuit model; power transformer hot-spot temperature prediction; solar radiation; transformer tank; voltage 220 kV; Heating; Integrated circuit modeling; Load modeling; Mathematical model; Oil insulation; Power transformers; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific

Conference_Location

Shanghai

ISSN

2157-4839

Print_ISBN

978-1-4577-0545-8

Type

conf

DOI

10.1109/APPEEC.2012.6307663

Filename

6307663