高电压技术2008，Vol.34Issue(9)：1898-1904,7.
A Modeling Method for Transformer Windings Under VFTO Based on S-parameters
A Modeling Method for Transformer Windings Under VFTO Based on S-parameters
摘要
Abstract
To study the Very Fast Transient Over-voltage(VFTO)distribution in transformer windings in gas insulated substation(GIS),a systematic methodology based on S-parameters is presented for establishing high-frequency model of transformer windings.Firstly,voltage transfer functions are derived from S-parameters which are calculated or measured from transformer windings.Secondly,voltage transfer functions are fitted with rational functions by the vector fitting method and then the rational transfer functions are order-reduced by optimal Pade-approximation algorithm.Lastly,the resultant voltage transfer functions are synthesized by network technology.Computational results are consistent with simulation results of Electromagnetic Transient Program(EMTP)and confirm the feasibility and validity of proposed methodology.关键词
VFTO/S-parameters/multi-conductor transmission line/vector fitting method/optimal Pade order-reduced algorithm/power transformerKey words
VFTO/S-parameters/multi-conductor transmission line/vector fitting method/optimal Pade order-reduced algorithm/power transformer分类
信息技术与安全科学引用本文复制引用
ZHANG Ping,WANG You-hua,NIE Xin-peng,YAN Wei-li,ZHANG Hai-jiao..A Modeling Method for Transformer Windings Under VFTO Based on S-parameters[J].高电压技术,2008,34(9):1898-1904,7.基金项目
Project Supported by the Important National Science Foundation of Hebei Province(E2006001036),Science and Technology Project of Hebei Province(072156167). （E2006001036）
