Title :
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
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;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2012 Asia-Pacific
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0545-8
DOI :
10.1109/APPEEC.2012.6307663
