变压器杂散损耗计算中的局部表面阻抗建模方法

doi:10.19595/j.cnki.1000-6753.tces.191296

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Abstract This paper studies the practical application of surface impedance method in stray loss calculation of magnetic conductive steel components of power transformer,such as oil tank,core pull plate,etc.Due to the problems of multi-scale and small penetration depth in the calculation of stray loss of transformer,it is difficult to consider both calculation accuracy and calculation efficiency.In this paper,considering the skin effect and three-dimensional stray field distribution characteristics of the magnetic steel,a local surface impedance modeling and analysis method is proposed to deal with the boundary conditions of the skin depth region and the field attenuation region respectively,which realizes the effective calculation of stray loss.Taking the international TEAM P21-B model as the research object,the stray loss measurement system of transformer is built.The experiment and simulation show that the local surface impedance method has the same calculation accuracy as the finite element method,but from the perspective of calculation scale and time,the former can greatly save computing resources and improve calculation efficiency while guaranteeing the calculation accuracy,which has high engineering practical value.

Key words： Surface impedance stray loss leakage magnetic field computation scale

Received: 08 October 2019

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TM41

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	Zhao Zhigang
	Wen Tao

Cite this article:

Zhao Zhigang,Wen Tao. Calculation Method of Stray Loss Based on Local Surface Impedance Boundary Modeling Method[J]. Transactions of China Electrotechnical Society, 2020, 35(22): 4699-4708.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191296 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I22/4699

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