基于扫频阻抗法的变压器绕组变形测试技术研究

在研究变压器绕组等效电路理论的基础上,分析了常用的诊断变压器绕组变形的频率响应法、短路阻抗法和低压脉冲法.结合频响法和阻抗法的优点,提出一种诊断变压器绕组变形的扫频阻抗法,使得一次测试能够获得频谱特征的同时,兼顾了短路阻抗特征信息的获取.对扫频阻抗法进行了仿真和模型变压器试验验证,结果证明该诊断方法比原有频响法先进、有效.

Research on transformer winding deformation test technology Based on FRAS method

On the basis of theory of winding equivalent circuit of transformer, analyzes the deformation diagnosis of transformer winding used frequency response method, the method of short-circuit impedance and low voltage pulse method. Combining the advantages of frequency response method and impedance method, puts forward a diagnosis of transformer winding deformation sweep frequency impedance method, makes a test to obtain the the same time, the short circuit impedance characteristic information. The sweep frequency im spectral features at pedance method is studied by simulation and model of transformer test, results show that this diagnosis method is much better than the original method of advanced, effective response.