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	Modeling of power transformer in wide frequency range and analysis of the impedance characteristic
	Yang Yu ; Wang Zan-ji ; Shao Chong
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical/ equivalent circuits power transformers transfer functions transformer cores transformer windings transient response transmission line theory/ power transformer modeling impedance characteristics analysis very-fast transient overvoltage VFTO distribution core type transformer winding multitransmission line theory MTL theory voltage transfer function impedance measurement pi type equivalent circuit/ B8350 Transformers and reactors
中文摘要	In order to precisely predict VFTO distributions in the windings during transformer design stage, the modeling of the power transformer winding in the wide frequency range is necessary. Applying multi-transmission line (MTL) theory to establish equivalent circuit of the transformer winding and calculating its driving point impedance and voltage transfer functions, the natural frequencies and transient response can be obtained. The validity of the equivalent circuit can be verified by comparison of the calculated and measured impedance of a model winding. In this paper, the consistence of two MTL models developed on the systems of the circular cylindrical coordinates and the rectangular coordinates respectively for the core type transformer winding is firstly analyzed. Then the phase-modal transformation for MTL equations and the parameters of the pi type equivalent circuit for MTL are developed. Finally, the driving-point impedance and the voltage transfer functions of the circuit are solved using node analysis. The measured impedance of a model winding verified that the equivalent circuit is valid for modeling of the transformer windings in the frequency range below 20 MHz.
语种	中文
出版者	Beijing University Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/82745]
专题	清华大学
推荐引用方式 GB/T 7714	Yang Yu,Wang Zan-ji,Shao Chong. Modeling of power transformer in wide frequency range and analysis of the impedance characteristic[J],2010, 2010.
APA	Yang Yu,Wang Zan-ji,&Shao Chong.(2010).Modeling of power transformer in wide frequency range and analysis of the impedance characteristic..
MLA	Yang Yu,et al."Modeling of power transformer in wide frequency range and analysis of the impedance characteristic".(2010).

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