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In view of the abnormal infrared temperature measurement of the high-voltage side bushing of a main transformer in a 110 kV substation, this paper carries out an active overhaul of the high-voltage side bushing, and makes some tests on the DC resistance measurement, capacitance measurement and dielectric loss measurement of the high-voltage side bushing, it is found that the DC resistance and dielectric loss of C-phase bushing are not up to standard. Through the disassembly inspection of C-phase casing, it is determined that the cause of this defect is the missing fixing pin between the conducting rod and the nut.

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Defect Analysis of 110kV Main Transformer Bushing

  • 会议论文

  • 发表日期：

    2025年

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  • Weixing Jiao,
  • Nana Duan,
  • Xikun Zhou,
  • Zhenzhen Liu

摘要

In view of the abnormal infrared temperature measurement of the high-voltage side bushing of a main transformer in a 110 kV substation, this paper carries out an active overhaul of the high-voltage side bushing, and makes some tests on the DC resistance measurement, capacitance measurement and dielectric loss measurement of the high-voltage side bushing, it is found that the DC resistance and dielectric loss of C-phase bushing are not up to standard. Through the disassembly inspection of C-phase casing, it is determined that the cause of this defect is the missing fixing pin between the conducting rod and the nut.