磁饱和网络变压器非线性模型建立
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摘要
为了研究外界信号经过变压器后的输入输出特性,基于变压器的高频特性和磁饱和特性,提出了一种变压器的非线性电路模型建立方法,并进行了验证。变压器的高频特性表现为电路模型的寄生参数,构成变压器模型的线性部分。磁饱和特性表现为电路模型的可饱和磁芯参数,构成变压器模型的非线性部分。变压器模型的线性参数和非线性参数可通过实验测量的方法获取。该模型能够预判网络变压器在电缆放电等非正常大信号注入时的输入输出特性。
In order to study input and output characteristics of the network transformer when the external signal was injected,based on the high frequency characteristics and magnetic saturation characteristics of the transformer,a method of establishing the nonlinear circuit model of the transformer was presented and verified.The high frequency characteristic of the transformer was the parasitic parameter of the circuit model,whichconstituted the linear part of the transformer model. The magnetic saturation characteristic was the saturable core parameter of the circuit model,which constituted the nonlinear part of the transformer model. The linear and non-linear parameters of the transformer model were obtained by experimental measurements. The model can predict the input and output characteristics of the network transformer when the abnormal large-signal such as cable discharge is injected.
In order to study input and output characteristics of the network transformer when the external signal was injected,based on the high frequency characteristics and magnetic saturation characteristics of the transformer,a method of establishing the nonlinear circuit model of the transformer was presented and verified.The high frequency characteristic of the transformer was the parasitic parameter of the circuit model,whichconstituted the linear part of the transformer model. The magnetic saturation characteristic was the saturable core parameter of the circuit model,which constituted the nonlinear part of the transformer model. The linear and non-linear parameters of the transformer model were obtained by experimental measurements. The model can predict the input and output characteristics of the network transformer when the abnormal large-signal such as cable discharge is injected.
引文
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[2]GAN Y,XU X,MAGHLAKELIDZE G,et al.System-level modeling methodology of ESD cable discharge to ethernet transceiver through magnetics[J].IEEE transactions on electromagnetic compatibility,2016,58(5):1407-1416.
[3]翁汉琍,杨国稳,相艳会,等.变压器饱和对交流电网直流电流分布的影响[J].高电压技术,2016,42(10):3295-3300.
[4]王东,王艳,焦彦军.适用于PLC的配电变压器高频等效模型及参数提取法[J].电力科学与工程,2016,32(8):16-21.
[5]邱燕.电力电子电路中高频变压器等效模型的分析[J].自动化与仪器仪表,2016,31(3):31-32.
[6]刘毅力,苑博,曹江田,等.高频变压器分布参数的实验研究[J].现代电子技术,2015(2):141-144.
[7]吴笃贵,徐政.电力变压器有源谐波模型[J].电网技术,1999,23(3):34-37.
[8]张诚,廖勇,刘刃,等.一种考虑饱和的变压器仿真模型的分析[J].重庆大学学报(自然科学版),2003,26(10):63-66.
[9]ABDULSALAM S G,XU W,NEVES W L A,et al.Estimation of transformer saturation characteristics from inrush current waveforms[J].IEEE transactions on power delivery,2006,21(1):170-177.
[10]杨洋.高频变压器分布参数模型建立及其测试方法研究[D].天津:河北工业大学,2015.
[11]BOWEN D,MAYERGOYZ I D,ZHANG Z,et al.Modeling and testing of ethernet transformers[J].IEEE transactions on magnetics,2009,45(10):4793-4796.
[12]SALAS R A,PLEITE J.Equivalent electrical model of a ferrite core inductor excited by a square waveform including saturation and power losses for circuit simulation[J].IEEE transactions on magnetics,2013,49(7):4257-4260.