NDLI: High frequency circuit model of transformer windings based on frequency responses for VFTO studies

Content Provider	IEEE Xplore Digital Library
Author	Zhang Zhongyuan Chen Yutong Liu Yupeng Lu Fangcheng
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. Eng., North China Electr. Power Univ., Baoding (Zhang Zhongyuan; Chen Yutong; Liu Yupeng; Lu Fangcheng)
Abstract	In order to study the effects of VFTO to transformers, the high frequency model for transformer windings must be set up. In this paper, a systematic methodology is presented for establishing the high frequency two-port circuit model of transformer windings under VFTO based on its frequency responses. The pi-equivalent circuit is constructed based on the Y-parameters transformed from the measuring S- parameters. A correction to the rational function of Y approximated by vector fitting (VF) is calculated, which enforces the real part of Y is positive definite. This enforcement can assure the passivity of the whole model, which could bring a stable simulation. The values of the synthesized RLCG elements can be easily calculated form the rational functions. This kind of pi-equivalent circuit model could do stable and exact simulation compared with the experiment results, which shows the validity of the method.
Starting Page	1528
Ending Page	1532
File Size	656904
Page Count	5
File Format	PDF
ISBN	9787900714138
DOI	10.1109/DRPT.2008.4523647
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-04-06
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	DRPT
Subject Keyword	Windings Power transformer insulation Circuit simulation Power system modeling Scattering parameters Gas insulation Frequency measurement Admittance Impedance Circuit synthesis VFTO High frequency circuit model passivity rational function stable simulation transformer windings VF
Content Type	Text
Resource Type	Article

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