电力变压器绕组变形的综合诊断法

Comprehensive Diagnosis Method of Winding Deformation of Power Transformer

为准确判断电力变压器故障后的绕组变形情况,笔者探究了频响法、短路阻抗法和绕组电容法综合判断变压器绕组变形的依据和规律。通过对故障变压器的理论分析和计算,结合实际的吊罩结果,证实了此3种方法的有机结合有助于准确分析和判断变压器绕组变形程度。

To improve the diagnosis accuracy of winding deformation in power transformer,the integration of frequency response analysis（FRA） method,short-circuit impedance and winding capacitance measurement were discussed and used for identification of transformer windings.The accuracy of dynamic integration of three methods is proved through the comparison of the theoretical analysis and calculation with the disassemble results of the fault power transformer.