Journal of Wind Energy (풍력에너지저널)

Korea Wind Energy Association (한국풍력에너지학회)
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Insulation Characteristics of Dry-air Insulated Switchgear for 72.5 kV Wind Power Generation

72.5 kV 풍력 발전용 Dry-air Switchgear의 절연 특성

  • Chan-Hee Yang ;
  • Jin-Seok Oh ;
  • Hee-Tae Park ;
  • Young-il Kim
  • 양찬희 (인텍전기전자(주), 전력기기연구소 ) ;
  • 오진석 (인텍전기전자(주), 전력기기연구소 ) ;
  • 박희태 (인텍전기전자(주), 전력기기연구소 ) ;
  • 김영일 (인텍전기전자(주), 전력기기연구소 )
  • Received : 2023.11.17
  • Accepted : 2024.06.21
  • Published : 2024.06.30
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Abstract

This paper describes the insulation breakdown characteristics of 72.5 kV dry-air insulated switchgear under development for installation in a wind power generator when a lightning impulse voltage is applied. For this study, the weak point of insulation due to the electric field concentration of the switchgear's internal shape was identified by finite element method (FEM) analysis, and the shape was actually simulated to measure and analyze the polarity of the lightning impulse voltage and the insulation breakdown characteristics according to the gas pressure at dry-air pressures of 0.1 Mpa to 0.45 Mpa. This study derives the maximum electric field with a 50 % discharge probability for each switchgear internal insulation vulnerable point based on the actual test and electrical simulation, which will be useful as reference data for supplementing and changing insulation design in the future.

Keywords

Acknowledgement

이 논문은 2022년도 정부(산업통상자원부)의 재원으로 한국에너지기술평가원의 지원을 받아 수행된 연구임(과제번호 : 20221A1010001C, 과제명 : (세부3)해상풍력 연계 66kV급 핵심기기 및 진단기술 개발)

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