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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.
유승덕(Seung-Duck Yu),김혜림(Hye-Rim Kim),임성우(Seong-Woo Yim),박충렬(Chung-Ryul Park),현옥배(Ok-Bae Hyun) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
최근 KEPRI-LS산전이 공동 개발한 22.9㎸급 초전도 한류기에 대하여 고창전력시험센터내에 22.9㎸ 실계통 선로를 구성하고 단락시험설비와 장기운전시험설비 그리고 이에 대한 초전도 한류기 및 전압, 전류상태등을 감시하는 모니터터링 시스템을 설치하였다. 초전도 한류기 실증시험설비의 구축은 초전도한류기가 상업운전 이전에 실계통에서의 운전 및 성능평가경험을 토대로 초전도한류기의 계통신뢰도를 높일 것이다.
충남(忠南) 남부지역(南部地域)의 소 유행렬(流行烈), 아까바네병(病) 및 이바라끼병(病)의 항체(抗體) 상황(狀況) 조사(調査)
천정훈 ( Joung Hun Chun ),이재봉 ( Jae Bong Lee ),이건택 ( Gun Tak Lee ),박옥배 ( Ok Bae Park ),박찬신 ( Chan Shin Park ),박봉균 ( Bong Kyun Park ) 한국가축위생학회 1994 韓國家畜衛生學會誌 Vol.17 No.1
To investigate serum neutralizing antibodies against Bovine ephemeral fever (BEF) virus, Akabane virus and Ibaraki virus in southern area of Chungnam province, Holstein sera were collected from April-May(269 heads/37 farms) and October-November(226 heads/35 farms), 1993. The results were summarized as follows; 1. Bovine ephemeral fever. -antibody positive rates to BEF virus were 46.1%(124 heads/269 Holstein) in April-May and 53.9%(122 heads/226 Holstein) in October-November. 2. Akabane disease. -antibody positive rates to Akabane virus were 34.2%(92 heads/269 Holstein) in April-May and 51.3%(116 heads/226 Holstein) in October-Novermber. 3. Ibaraki disease. -antibody positive rates to Ibaraki virus were 57.6%(155 heads/269 Holstein) in April-May and 38.5%(87 heads/226 Holstein) in October-November.