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Engineering Calculation Method Research on Eddy Current Loss and Temperature Distribution of Transformer Winding

Author: WangYuXiang
Tutor: DingQiaoLin；WangJianMin
School: North China Electric Power University
Course: Electromagnetic Field and Microwave Technology
Keywords: Transformer Winding Eddy current loss Temperature distribution Engineering Algorithm
CLC: TM401
Type: Master's thesis
Year: 2011
Downloads: 73
Quote: 0
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Abstract


Local overheating problems due to the leakage of the magnetic field caused by the eddy current loss in the transformer caused the transformer design problems . Transformer unit capacity of the scale of the power system is increasing , the above problem is particularly important . This article through the foil and oil-immersed power transformers to establish reasonable simplified calculation model , using the finite element method analysis of transformer leakage magnetic field and the distribution of the eddy current loss in the steady-state operation , and the distribution pattern of the corresponding parameters and some the conclusions of the analysis of the value of engineering applications , a reliable analytical method for the accurate calculation of the transformer load loss , and also provides the basis for calculation of transformer winding hot spot temperature distribution data . Loss calculation method and the results show that by comparison with the measurements of the actual product , meet product design requirements . Electric line running most of the power transformer oil-immersed transformer . More than 80% of the oil-immersed transformers with natural oil circulation cooling method . The direct consequence of the way with natural oil circulation cooling copper oil temperature increase , the transformer thermal problem is more prominent . Based transformer heating and cooling theory , according to the calculated winding leakage magnetic field and eddy current loss distribution , derivation and calculation method to determine the the natural cooling transformer winding temperature distribution engineering . The calculated split unit eddy current loss in MF2D dedicated software based on the preparation of the the winding temperature distribution engineering arithmetic procedures . The calculated results with the hot-spot temperature measurement or comparison of common software to examine the reasonableness of the calculation procedures and methods , and rational calculation and distribution of oil-immersed transformer winding temperature to prevent local overheating problems , and provides a simple and effective method of analysis .

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