为有效提高对变压器绕组变形检测的准确性，以扫频阻抗法为理论基础，建立一套扫频阻抗法测试系统，并运用该系统对一台三相变压器进行测试分析。结果表明：扫频阻抗法结合了频率响应分析法和短路阻抗法的优点，对变压器绕组变形故障具有极高的灵敏度，能够有效减少对绕组变形的误判。
To increase the accuracy of detecting the transformer winding deformation, we developed a new transformer winding deformation detection system based on sweep frequency impedance method (SFI), and a three-phase transformer was tested by the system. The results show that the SFI can com-bine the advantages of frequency response analysis method (FRA) and short circuit impedance method (SCI). The method has extremely high sensitivity to detect transformer winding deformation fault, and can reduce the misjudgment on the transformer winding deformation.
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