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.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
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)
关键词
VFTO矢量匹配法
电力变压器绕组
散射参数
电路综合
VFTO
vector fitting
electric power transformer windings
scattering parameter
circuit synthesis
