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Short Circuit Electromagnetic Force Prediction by Coupled Electromagnetic-Mechanical Field Analysis of Dry-Type Transformer

전자계-기계계 결합해석에 의한 건식변압기의 단락강도 예측

  • 안현모 (동아대 공대 전기공학과) ;
  • 한성진 (동아대 공대 전기공학과)
  • Received : 2010.10.19
  • Accepted : 2011.01.10
  • Published : 2011.02.01

Abstract

This paper deals with the coupled electromagnetic-mechanical field analysis for short-circuit electromagnetic force of the dry-type transformer. The short-circuit currents are calculated using external circuit in accordance with short-circuit test equipment. According to short-circuit current, the generated magnetic leakage flux density in dry-type transformer model is calculated by finite element method. The radially-directed electromagnetic forces in windings are calculated using electromagnetic field analysis and then axially-directed electromagnetic forces in windings are calculated using electromagnetic-mechanical field analysis. The calculated axially-directed electromagnetic forces in high voltage winding are compared to those of measured ones and showed good agreement with experimental results.

Acknowledgement

Supported by : 한국에너지 기술평가원(KETEP)

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