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

The Korean Institute of Electrical Engineers (대한전기학회)
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Diagnosis of Fault and Abnormal Conditions in a Single-Phase Transformer Using S-parameter Measurement

S파라미터를 이용한 단상 변압기의 이상 상태 진단에 대한 연구

  • Kim, Jeongeun (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Kim, Kwangho (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Nah, Wansoo (Dept. of Electrical and Computer Engineering, Sungkyunkwan University)
  • Received : 2018.08.10
  • Accepted : 2018.09.28
  • Published : 2018.10.01
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Abstract

In this paper, we propose a two-port S-parameter data to diagnose the fault conditions of a single-phase transformer. Using the S-parameters we can measure the reflection and transmission characteristics of signal power at the port of a transformer, which can also be converted into ABCD parameters and Z parameters through a well-known conversion formulas. Transformer fault diagnoses can be performed based on the intuitive and qualitative/quantitative characteristics of the these parameters. In addition, we can obtain wide frequency characteristics at the primary and secondary sides of the transformer, which can be used to get time domain responses using the inverse Fourier transformation with some specific input waveform. In order to verify the effectiveness of the proposed method, the fault conditions were analyzed in simulation and experiment for 3 kVA single phase transformer with 15: 5 turns ratio, and the validity of the proposed method was verified.

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References

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