Heat Transfer in Transformer Winding Conductors and Surrounding Insulating Paper
The accurate prediction of magnitude and location of the maximum temperature or hot-spot of transformer windings is of great importance for evaluating transformer thermal performance. In the attempt to accurately represent characteristics of this hot-spot, various thermal modelling methodologies have been developed, including methods which employed forms of Computational Fluid Dynamics (CFD). In the simplified scenario where eddy loss is ignored, the ohmic power generated by winding conductors is the only heat source to be extracted by the coolant oil flow , and a winding disc of multiple cable elements is modelled as a uniformly distributed volumetric heat source at the duct surface boundary. In CFD such an assumption reduces the complexity of modelling process; however it limits the predictive accuracy. This paper considers the heat transfer phenomena inside winding discs comprising copper conductors and surrounding insulating paper, and proposes a non-uniform temperature distribution among conductors. It is envisaged that this would help improve boundary conditions used for the CFD modelling of transformer coolant oil circulation.
Power Transformer Thermal Modelling Heat Transfer Hydraulic CFD
W. Wu A. Revell Z.D. Wang
School of Electrical and Electronic Engineering at University of Manchester School of Mechanical, Aerospace and Civil Engineering at University of Manchester
国际会议
The International Conference on Electrical Engineering 2009(2009 电机工程国际会议)
沈阳
英文
1-6
2009-07-05（万方平台首次上网日期，不代表论文的发表时间）