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Current Transport Characteristics of 22.9 ㎸ High Temperature Superconducting Cable System
손송호(S. H. Sohn),임지현(J. H. Lim),류희석(H. S. Ryoo),양형석(H. S. Yang),최하옥(H. O. Choi),마용호(Y. H. Ma),김동락(D. L. Kim),류경우(K. W. Ryu),성태현(T. H. Sung),현옥배(O. B. Hyun),임성우(S. W. Lim),황시돌(S. D. Hwang) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.7(초록집)
양형석(H.S. Yang),김동락(D.L. Kim),손송호(S.H. Sohn),임지현(J.H. Lim),최하옥(H.O. Choi),최연석(Y.S. Choi),이병섭(B.S. Lee),정원묵(W.M. Jung),류희석(H.S. Ryoo),황시돌(S.D. Hwang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
A system for the 3-phase 100-m HTS power cable with 22.9㎸/1.25㎄ has been tested at the KEPCO뭩 Gochang power testing center since 2006. The cooling system consists of a liquid nitrogen decompression cooing system with a cooling capacity of 3㎾ at 66K and a closed circulation system of subcooled liquid nitrogen. Heat loads of the KEPCO HTS power cable system for several electrical loads were measured for investigating long-term operating performance such as cooling capacity, heat load, AC loss, temperature stability of the system.
양형석(H.S. Yang),김동락(D.L. Kim),손송호(S.H. Sohn),임지현(J.H. Lim),최하옥(H.O. Choi),이병섭(B.S. Lee),최연석(Y.S. Choi),류희석(H.S. Ryoo),황시돌(S.D. Hwang) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
As a power transmission line supplying power to a densely populated city, the high temperature superconducting (HTS) cable is expected to one of the most effective cables with a compact size because of its high current density. The verification of HTS power cable system have been progressed by KEPRI. A cooling system for a 3-phase 100m HTS power cable with 22.9㎸/1.25㎄ was installed and tested at KEPCO’s Gochang power testing center in Korea. The system consists of a liquid nitrogen decompression cooling system with a cooling capacity of 3㎾ and a closed circulation system of subcooled liquid nitrogen. Several performance tests of the cable system with respect to the cooling such as cooling capacity, heat load and temperature stability, were performed at several temperatures. Thermal cycle test, cool-down to liquid nitrogen temperature and warm-up to room temperature, was also performed to investigate thermal cycle influences. The outline of the installed cooling system and performance test results are presented in this paper.
불평형 부하에서의 초전도케이블 운전 및 냉각부하 특성에 관한 연구
손송호(S. H. Sohn),임지현(J. H. Lim),양형석(H. S. Yang),최하옥(H. O. Choi),마용호(Y. H. Ma),김동락(D. L. Kim),류희석(H. S. Ryoo),류경우(K. W. Ryu),황시돌(S. D. Hwang) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
Demonstrations to deploy high temperature superconducting (HTS) cable to the real gird are actively carried out throughout the world. Power utilities have an interest in the inherent advantage of the HTS cable system, and achieve the expected results from the series of verification test. To embody the reliability in the phenomenon occurred commonly in three-phase system, we simulate the load unbalance. A 22.9 ㎸ large scale HTS cable system with the specification of 100 m-long, 50 ㎹A capacity has been tested with up to 30% unbalance rate. To evaluate the effect of AC loss increase due to the unbalanced load, the cooling loads are measured by the calorimetry method. In this paper, the correlation between AC loss and load unbalance is described and investigated precisely.
정성환(S. H. Jeong),남기영(K. Y. Nam),이재덕(J. D. Lee),최상봉(S. B. Choi),류희석(H. S. Ryoo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The IEEE std 738 and Cigre Electra documents are well known as the standard of calculating the ampacity of overhead conductors. Although these two standards use the same basic heat balance concept, they use different applicable methods to calculate ampacity ratings. This paper examines the concept of basic heat balance equation and the differences of each term of basic heat balance equation.
저압 절연전선의 허용전류 계산을 위한 열적 파라메타 검토
정성환(S. H. Jeong),남기영(K.Y. Nam),이재덕(J. D. Lee),최상봉(S. B. Choi),류희석(H. S. Ryoo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Recently KS standards being kept in step with IEC standard in electrical safety. This paper examines thermal parameters of KS C IEC 60364-5-523(2002) to calculating the ampacity of insulated cable at 1㎸ below.