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60Hz ELF 자계에 의한 인체내부 유도 전류밀도 해석
민석원,송기현 대한전기학회 2006 전기학회논문지C Vol.55 No.2(C)
- This paper analysed the characteristics of current density induced inside human body by 60 Hz extremely low frequency magnetic fields according to varying conductivities of human model. Human model was composed of several organs and other parts, whose shapes were expressed by spheroids or cylinders. Organs such as the brain, heart, lungs, liver and intestines were taken into account. Applying the boundary element method to the human model, we estimated effects on the induced current distribution due to differences of the organ conductivity and shape. We find organ conductivity influences most and a cross section area and a position of organ also gives effects.
민석원 순천향대학교 부설 산업기술연구소 1998 순천향 산업기술연구소논문집 Vol.3 No.3
Numerical calculation of electric fields is apt to result in large relative errors in composite media with extremely different properties such as permittivity and conductivity. This paper proposes numerical computation techniques for these case in Surface Charge Method(SCM). Formulas are given for boundary conditions of the SCM in composite dielectric arrangements. Three kinds of the calculation technique, Method α, β and γ, are investigated with 3 dimensional triangular SCM for the arrangement of the dielectric sphere under a uniform electric field.
60Hz ELF 자계에 의한 인체내부 유도 전류밀도 해석
민석원,송기현,Min Suk-Won,Song Ki-Hyun 대한전기학회 2006 전기학회논문지C Vol.55 No.2
This paper analysed the characteristics of current density induced inside human body by 60 Hz extremely low frequency magnetic fields according to varying conductivities of human model. Human model was composed of several organs and other parts, whose shapes were expressed by spheroids or cylinders. Organs such as the brain, heart, lungs, liver and intestines were taken into account. Applying the boundary element method to the human model, we estimated effects on the induced current distribution due to differences of the organ conductivity and shape. We find organ conductivity influences most and a cross section area and a position of organ also gives effects.
765 kV 2회선 송전선 활선 작업자 인체내부 유도전류 밀도 해석
민석원,송기현 대한전기학회 2006 전기학회논문지C Vol.55 No.5(C)
- This paper analysed the induced current density inside human body of hot-line worker for 765kV double circuit transmission line according to locations of human body. Human model was composed of several organs and other parts, whose shapes were expressed by spheroids or cylinders. Organs such as the brain, heart, lungs, liver and intestines were taken into account. Applying the 3 dimensional boundary element method, we calculated induced current density in case a worker was located inside and outside a lowest phase of 765 kV transmission line in which a 60% current of maximum load flowed. As results of study, we found a maximum induced current density in all organs was less than 10 mA/m2 when a worker was outside. As one in brain and heart was higher than 10 mA/m2 when a worker was inside, we propose a method for lowering current density.
민석원,송기현 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.4
본 논문에서는 전력계통에 미치는 영향이 매우 큰 초고압 송전선 다상 뇌격섬락 사고에 대하여 과도현상 분석 프로그램인 ATP를 이용하여 검토하였다. 특히 다상섬락현상 모의에 가장 중요한 아킹혼을 비선형 인덕턴스와 저항으로 표현하여 이 모델의 타당성을 검토하였고 765[k베 2회선 송전계통의 뇌격 파라메터와 섬락상과 관계를 연구하였다. This paper investigates a lightning multi-phase flashover on extra high voltage transmission line, which has influence on power systems very much, by the use of ATP. Especially we validated an arcing horn model represented by the nonlinear inductance and resistance which is the most important on the simulation for a multi-phase flashover. We also study relationships between lightning parameters and flashover phases in 765(㎸) double circuit transmission system.
유전율 및 도전율을 고려한 765kV 송전선하의 전계에 의한 인체내부 유도 전류밀도 해석
민석원,송기현 순천향대학교 부설 산업기술연구소 2004 순천향 산업기술연구소논문집 Vol.10 No.1
This paper analysed the induced current density by electric field of human body under the 765 kV transmission line considering permittivity and conductivity. As permittivity of human body is very high as 10^6 at 60Hz, special numerical computation technique in Surface Charge Method(SCM) for composite media with extremely different propertis is applied to reduce calculation error of induced current density and electric field inside the human body. Calculation results show that the average of the induced current density human body is about 3mA/m^2, which is less than ICNIRP criterion(10mA/m^2)