【作者】 聂鑫鹏； 张萍； 汪友华； 张海蛟；

【Author】 Nie Xin-peng~1,Zhang Ping~1,Wang You-hua~1,Zhang Hai-jiao~2 1.Hebei University of Technology,Electrical and Automation Institute,Tianjin 300130 2.Baoding Tianwei Group,Baoding 071051,China

【机构】 河北工业大学电气与自动化学院； 保定天威集团；

【摘要】 为了得到高频变压器绕组的降阶模型,本文首先根据短路导纳参数计算绕组各匝的电压传输函数,然后利用矢量匹配法对得到的电压传输函数进行有理逼近,最后分别采用常规Pade、Routh和最优Pade降阶算法对有理函数形式的电压传输函数进行阶数缩减,得到变压器绕组的降阶模型。仿真结果表明,最优Pade降阶算法既可保留原高频模型的主要幅相频特性,而且可以较大程度上简化模型,是目前最适合的获得变压器绕组降阶模型的算法。更多还原

【Abstract】 To obtain order-reduced model of high-frequency fransformer windings,firstly voltage transfer functions are derived from short-circuit admittance parameters which are calculated from the disfributed parameters or measured parameters of transformer windings in this paper.Secondly,voltage transfer functions are fitted with rational functions by Vector Fitting method.Lastly common Pade algorithm,Routh algorithm and optimal Pade approximation algorithm are order-reduced for rational voltage transfer functions to obtain approximate model of transformer windings. Simulation results show optimal Pade approximation algorithm not only can reserve main magnitude-phase characteristics of high-frequency model,but also can simplify high-frequency model.So this algorithm is the fittest algorithm for gaining order-reduced model at present.更多还原