VFTO下变压器绕组的EMTP模型  

High-frequency EMTP Model of Transformer Windings

作　　者：王晓晖[1] 董华英[1] 梁贵书[1] 张喜乐[1] 崔翔[1] 周文焘 

机构地区：[1]华北电力大学电气工程学院 [2]保定天威保变电气股份有限公司,保定071000

出　　处：《高电压技术》2006年第3期4-6,共3页High Voltage Engineering

基　　金：河北省自然科学基金资助项目(503624)

摘　　要：为开展VFTO对变压器影响的研究,先由变压器绕组的S参数计算所需的电压传输函数,然后通过矢量匹配法对电压传输函数进行有理函数逼近,再应用多点Pade逼近降阶,在此基础上实现电路形成了变压器绕组的通用宽频EMTP电路模型。该模型的仿真结果与实测结果吻合,表明该方法简单、准确。An EMTP model is presented for calculating overvoltage in transfornmer windings under VFTO in this paper. Firstly, the voltage transfer functions are calculated from the S parameters which are measured by network analyzer or calculated from the distributed parameters of transformer windings. Secondly, the voltage transfer functions are fitted with rational functions hy vector fitting codes and then the rational transfer functions are order-reduced by multlpoint Pade approximation. Lastly, the resultant voltage transfer functions are synthesized by the elements in EMTP. The calculated voltages from the circuit hy EMTP are in good agreement with the measured voltages. This shows that the method is simple and correct.

关 键 词：VFTO矢量匹配法 电力变压器绕组 散射参数 电路综合 

分 类 号：TM403[电气工程—电器]