The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Measurement and Analysis of Insulation Detects of Cast-resin Transformers using Antenna

안테나를 이용한 몰드변압기 절연결함 측정기법 연구

  • Choi, Myeong-Il (Electrical Safety Research Institute, Korea Electrical Safety Co.) ;
  • Kim, Jae-Jin (Electrical Safety Research Institute, Korea Electrical Safety Co.) ;
  • Han, Ga-Ram (Electrical Safety Research Institute, Korea Electrical Safety Co.) ;
  • Jeon, Jeong-Chay (Electrical Safety Research Institute, Korea Electrical Safety Co.) ;
  • Lee, Hyun-Ok (Korea Polytechnics Mokpo Campus)
  • Received : 2016.08.18
  • Accepted : 2016.09.20
  • Published : 2016.11.01
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Abstract

Unlike oil immersed transformers, cast-resin transformers have the solid insulator 'epoxy resin' in sealed structure. Therefore, they reveal a lot of limitations in checking aging conditions and predicting an accident. This study analyzed the characteristics of Cast-resin transformers by the measurement distance and measurement sensitivity with a corona defect sample, using antenna sensor. Therefore, the experiment has proven that the antenna sensor-based measurement method proposed in this study is able to detect the insulation defect location of the cast-resin transformer, unlike conventional measurement methods. It is expected that the result of this study will be used to develop a new type of measuring method in order to measure insulation defects and to use in safety inspection of domestic cast-resin transformers.

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References

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