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.
引文
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