Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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A Study on Improving of Fault Recognition Method in Distribution Line

배전선로 고장인지 방식에 관한 연구

  • Lee, Jin (Department of Electrical Engineering, Mokpo National University) ;
  • Park, Chan (Department of Electrical Engineering, Mokpo National University)
  • 이진 (목포대학교 전기공학과) ;
  • 박찬 (목포대학교 전기공학과)
  • Received : 2019.09.09
  • Accepted : 2019.09.11
  • Published : 2020.01.01
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Abstract

The aim of this study is to improve the fault decision ability of FRTU (Feeder remote terminal unit) in DAS (Distribution automation system). FRTU uses the FI (Fault indicator) algorithm based on fault current pickup and operation of the protection device. Even if the inrush current flows or the protection device is sensitive to the transient current, FRTU may indicate incorrect fault information. To address these problems, we propose an improved fault recognition algorithm that can be applied to FRTU. We will detect a specific wave that is indicative of a fault, and use this information to identify a fault wave. The specific wave-detection algorithm is based on the duration and periodicity of the voltage, current, and harmonic variations. In addition, we propose fault recognition algorithms using voltage factor variation analysis and DWT (Discrete wavelet transform). All the wave data used in this study were actual data stored in FRTU.

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