阻抗法和频响法诊断电力变压器绕组变形

Diagnosis of Winding Deformation of Transformer by Impedance Method and FRA

简要介绍了阻抗法和频响法测量电力变压器绕组变形的基本原理和实现方法，比较分析了阻抗法和频响法对两种典型变形测试的灵敏性，并指出了两种方法的互补性。在初步总结诊断绕组变形基本规则的基础上，对某次变压器绕组办形故障进行了分析和诊断。

The Short-circuit Reactance method and Frequency Response Analysis (FRA) method which can be usedto measure and diagnose the deformation of power transformer winding are introduced' With these two methods,laboratory research is made on an actual transformer model,and the sensitivity of both methods in two typical simulatedwinding deformation are compared' It is concluded thatthese two methods are mutually complementary in the diagnosis of winding deformation. Finally, some basic rules fordiagnosing transformer winding deformation are presentedand are put into suceessful application in analysis of a powertransformer winding fault.