MODELING FOR TRANSFORMER WINDINGS UNDER VFTO BASED ON S-PARAMETERS
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 in this paper. 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 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) to confirm the feasibility and validity of proposed methodology.
VFTO S-parameters Multi-conductor transmission line Vector Fitting method Optimal Pade order-reduced algorithm Power transformer
PING ZHANG YOU-HUA WANG XIN-PENG NIE WEI-LI YAN HAI-JIAO ZHANG
Hebei University of Technology, Tianjin 300130, China Baoding Tianwei Group, Baoding 071051, China
国际会议
2008 International Conference on Machine Learning and Cybernetics(2008机器学习与控制论国际会议)
昆明
英文
2314-2319
2008-07-12（万方平台首次上网日期，不代表论文的发表时间）