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EMTP를 이용한 362kV Gas VT의 철공진제거를 위한 가포화리엑터의 파라미터 선정
최재구,김익수,박경원,송희석,Choi, Jae-Gu,Kim, Ik-Soo,Park, Kyoung-Won,Song, Hee-Suk 대한전기학회 2001 전기학회논문지C Vol.50 No.4
Recently, the construction of gas insulated substation(GIS)s has been increased in Korea. But, the whole quantity of the VTs which were used in GIS has been imported. Under the circumstance that $SF_6$ gas power apparatus are being developed up to 800kV rating in Korea, the development of EHV $SF_6$ gas VT is essential for localizing the power apparatus. As for EHV VT, destructive ferroresonance can be generated due to the combination of capacitiances between poles of circuit breaker, ground capacitance of bus and nonlinear excitation property of VT core. But the theoretical analysis about ferroresonance has not been fully achieved in Korea. Therefore, in this paper the authors would like to contribute for localizing EHV $SF_6$ gas VT by developing the diagram of ferroresonance zone according to the parameters of the circuit and the saturable reactor.
최재구,Choi, Jae-Gu 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.5
The livestocks are sometimes infected with pathogenic microorganisms such as bird influenza, brucellosis, pig cholerae, and salmonella. However, it is difficult to predict the outcome of these diseases because the livestocks are mostly raised in the rural areas. Efficient systems for detecting and alerting the onset of livestock diseases are urgently required. In these studies, the fluorescent analysis method, luminescent analysis method, and frequently used gene amplification method (polymerase chain reaction) have been developed in order to detect the pathogenic microbes in the early stages of disease progression. By using these developed systems, damages due to the livestock diseases induced by microbes can be minimized. If we can detect livestock diseases in the early stage, the costs for diagnosis and treatment will be reduced, and the livestock can be quickly recovered.