一种计算变压器绕组雷电过电压分布的新算法

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Abstract In order to research on the voltage distribution in transformer winding suffering from the lightning surge, a simulation model of 160-turn winding based on multi-conductor transmission line (MTL) theory is established and a new method for the calculation of voltage distribution is proposed in the paper. Firstly, the finite element method(FEM) is adopted to calculate the electric parameters R, L, C and G of windings. Secondly, the voltage transfer functions are obtained by solving the MTL equations under multiple frequencies. Then, the voltage transfer functions are fitted with rational functions by vector fitting. Lastly, the voltage response in transformer winding is shaped through the convolution between the voltage transfer functions and the excitation. The simulation result confirms the validity of this proposed methodology. This research is of great significance for the insulation design of transformer.

Key words： keywords：Transformer winding multi-conductor transmission line voltage distribution transfer function lightning surge

Received: 20 September 2012 Published: 12 December 2013

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TM315

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	Xu Jiazhu
	He Jian
	Yan Xilin
	Tong Hao
	Huang Hua

Cite this article:

Xu Jiazhu,He Jian,Yan Xilin等. A New Algorithm of Calculating the Lightning Surge Distribution in Transformer Windings[J]. Transactions of China Electrotechnical Society, 2013, 28(1增): 115-120.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1增/115

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