频率响应分析法检出变压器绕组变形实例分析

Diagnosis Example of Transformer Winding Deformation Using Frequency Response Analysis

介绍了应用频率响应分析法检出变压器绕组变形实例。根据同厂同型变压器绕组频谱的规律性对变压器三相绕组频谱和短路冲击前后同相绕组频谱综合比较分析 ,可准确诊断变压器绕组的变形情况 ,决定其是否可继续运行。

The paper presented an example of the fault diagnosis of the winding deformation of the electric power transformer using frequency response analysis.According to the characteristics of the spectrograms of the same type transformers made by the same manufactory,the winding deformation of the electric power transformer can be detected accurately by comparing the three-phase spectrograms or the cophasal spectrograms tested before and after the shortcircuit of the same transformer.When the winding deformation lies in the electric power transformer, whether the transformer can operate safely or not should be concluded from the comprehensive analysis based on the daily operation conditions and the data of the electrical and chemical test.