基于Matlab/Sumilink的变压器差动保护及其运行教学

Transformer Differential Protection Based on Matlab/Sumilink and Its Operation Teaching

此文利用Matlab/Simulink软件搭建电气一次部分模型进行变压器励磁涌流仿真分析;再进行变压器的比率制动式差动保护、二次谐波制动模块、电流互感器断线检测模块、差动速断模块的搭建,并进行变压器绕组外部的保护区内外短路故障、绕组匝间短路故障、励磁涌流的仿真,并分析差动保护动作情况;最后进行电流互感器二次断线的仿真,观察保护模块的输出结果。

In this paper, Matlab/Simulink software is used to build a part of the electrical model for transformer inrush current simulation analysis;Then the differential protection of ratio brake type of transformer, the second harmonic brake module, the broken line detection module of current transformer and the differential quick break module are built The simulation of inter-turn short-circuit fault,short-circuit fault inside and outside protection zone of transformer windings and magnetizing inrush current are carried out, and the operation of differential protection is analyzed Observe the output of the protection module.