基于EMTP/ATP的变压器建模及励磁涌流的仿真研究

The Simulation Researoh of Transformer Modeling and Excitation Surge Based on EMTP/ATP

阐述了应用EMTP/ATP程序建立变压器励磁涌流仿真计算模型,该模型考虑了变压器的磁滞饱和特性及铁芯和绕组的结构形式。在所建立的模型上对变压器空载合闸时励磁涌流进行仿真研究,并利用离散傅立叶算法(DFT)对涌流中的谐波成分进行分析。仿真计算结果表明,该模型能较准确地仿真变压器的各种故障情况,为变压器差动保护的设计提供依据。

To use EMTP/ATP program for establishing transformer excitation surge miulateon computatcon model. For the model, it considers the magnetic saturation and characteristic of the transformer and the structural form of the iron core and uindings. On the basis of the model, the simulaion reacarch of the excitation surge s carried out when the transformer non - load closing and use dispersed Fourier algorithm to analyze harmonic components in the surge. The smula- tion colculation results show the model can accurately simulate various fault conditions, giving the basis for differential protection design of the transformers.