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아크지속시간 측정을 통한 나선형 VI 전극의 전극배치에 따른 아크제어 성능비교
김병철,박홍태,오일성,임기조,Kim, byoung-Chul,Park, Hong-Tae,Oh, Ill-Sung,Lim, Kee-Joe 한국전기전자재료학회 2009 전기전자재료학회논문지 Vol.22 No.2
One of the purposes of arc control is to change its state to the diffuse state before current zero as soon as possible. This can provide optimal conditions for full extinction of arc by minimizing the quantity of residual plasma between contacts near current zero. TRV(transient recovery voltage) occurs at current zero at the same time with current interruption. If there is substantial residual plasma near current zero it can cause 'post arc current' by the interaction of its conductance with TRV. In this paper, arc control ability as a function of configuration of spiral type VI contacts was compared on the criteria of the time taken for arc to reach to the diffuse state.
실증시험용 배전급 초전도 한류기의 특성 평가 및 운전 시험
임성우(Seong-Woo Yim),박충렬(Chung-Ryul Park),유승덕(Seung-Duck Yu),김혜림(Hye-Rim Kim),현옥배(Ok-Bae Hyun),박권배(Kwon-Bae Park),심정욱(Jungwook Sim),이경호(Kyoung-Ho Lee),오일성(Ill-Sung Oh) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Superconducting fault current limiter (SFCL) is an power device of a novel concept. While SFCLs generate no ohmic loss during the operation carrying normal currents, they can limit fault currents very fast making large impedance by their quench characteristics. In 2006, KEPCO has developed a distribution class hybrid type SFCL by a collaborative research project with LS industrial systems. The SFCL has merits in practical and economical points of view. In the SFCL, the superconductor just plays a role of a fault detector and the current limiting is completed by the other current limiting element made of normal metals throu호 the line commutation. As a result, the required amounts of superconductors can be reduced considerably. Consequently, the hybrid SFCL can be fabricated with small size and cost, maintaining perfect current limiting performance. Currently, KEPCO is carrying out a research project at Gochang power test center for the purpose of the verification test of the 22.9 ㎸/ 630 A class SFCL for the practical application in real grid. Through the project, a long term operational test and fault current test will be done. In this paper, the back ground of development and installation of the SFCL will be explained and the operation plan of the SFCL for the verification test is also introduced.