인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
HVDC (High Voltage Direct Current) transmission systems are efficient for long-distance, high-capacity power transfer and asynchronous network interconnection. However, insulation design is challenging due to localized polarization and space charge effects in steady-state conditions, and high electrical stress in transient conditions. This study focuses on designing corona rings for 500kV HVDC transmission systems, addressing all electrical stresses encountered under both steady-state and transient-state to enhance insulation reliability. Using COMSOL Multiphysics, three key corona ring parameters were optimized to mitigate electrical stresses. Finite element analysis showed maximum electric fields were concentrated near metal fittings and sheds under steady-state conditions, and at the triple junctions under transient-state. Before corona ring installation, safety factors were critically low at 0.5 in steady-state and 0.1 in transient conditions. The optimized corona ring increased safetyfactors to 2.5 and 3.3 in steady-state, and 1.3 and 1.2 in transient-state. These results demonstrate the optimized corona ring effectively mitigates electric field concentrations, enhances safetyfactors, and extends the operational life of polymer insulators, ensuring reliability under extreme conditions.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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UCI(KEPA) : I410-151-25-02-092309655