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심요섭(Yo Shep Shim) 산업기술교육훈련학회 2018 산업기술연구논문지 (JITR) Vol.23 No.3
In this paper, electrical simulations of electric shock accidents at voltages of 220V have been carried out using an Andred s body model underwater. First, we construct a circuit fitting Andred s body model. Then, we compare voltage measurementsat a hand, breast, and the waist, and current measurementsat the same locations, with safety limits of electric current flowing through a body. We conclude from our results that the magnitude and wave of an electric currentpassing through a body mimics the effect ofa heart control signal. It also hasa direct impact on the ventricle of the heart in detailed motion. The simulations have been performed with the ATP-Draw program. Furthermore, this study finds safety issues for an electric angle limit when taking measurements of a flooded body resistance, and the voltage and current passing through each part.
침수 전기설비가 인체 모델에 미치는 전기적 특성에 관한 연구
심요섭(Yo-Shep Shim),박태열(Tae-Yeol Park) 산업기술교육훈련학회 2008 산업기술연구논문지 (JITR) Vol.13 No.4
In this paper, charging part by basic from Andrew s body model research to second a danger have affect on remaining and rehabilitation humans in space under water. The construction of a circuit make to Andrew s body model. It compare that voltages measure a hand, a breast, a groin and electric currents measure an arm, a breast, a leg with safety a limit of body through an electric current. Out of result, it research that magnitude and wave of body passing an electric current give the effect to the heart control a signal and it have affect on direct the ventricle of the heart in detail motion. A thing of this sort get through to the simulation by the ATP-Draw program. The results from above, it is publish one s research work with safety a limit electric angle take measurement of resistance a body in under water and to the voltage and electric current passing each parts.
허리까지 침수된 경우 인체모델에 미치는 전기적 특성에 관한 연구
심요섭(Yo Shep Shim) 산업기술교육훈련학회 2014 산업기술연구논문지 (JITR) Vol.19 No.3
In this paper, the Electrical Simulation of electric shock accidents at the voltages of 220[V] have been studied using an Andred s body model in underwater. The construction of a circuit make to Andrew s body model. It compare that voltages measure a hand, a breast, a waist, and electric currents measure a hand, a breast, a waist with safety a limit of body through an electric current. Out of result, it research that magnitude and wave of body passing an electric current give the effect to the heart control a signal and it have affect on direct the ventricle of the heart in detail motion. A thing of this sort get through to the simulation by the ATP-Draw program. The results from above, it is publish one s research work with safety a limit electric angle take measurement of resistance a Flooding body and to the voltage and electric current passing each parts.
Improving Breakdown Voltage Characteristics of GDAs using Trigger Voltage
Lee, Sei-Hyun The Korean Institute of Electrical Engineers 2010 Journal of Electrical Engineering & Technology Vol.5 No.4
This paper investigates a method to improve the breakdown voltage characteristics of a gas discharge arrester (GDA) for a surge suppressor. The middle electrode is inserted between two terminal electrodes. Voltage application to the electrode synchronized and amplified by the impulse voltage decreases spark overvoltage from 45% to 57.6%. The decrease is caused by higher voltage slope, as opposed to applied impulse voltage (by 5.5 to 6.2 times). In addition, the GDA model using ATP-Draw was used to analyze the operation characteristics of GDAs. The test and simulation results agree to within 2% when the trigger source was used.
수중인체모델의 충전전원설비 촉수시 전기적 특성에 관한 연구
심요섭(Yo-Shep Shim) 산업기술교육훈련학회 2020 산업기술연구논문지 (JITR) Vol.25 No.3
In this study, the electrical simulation of electric shock accidents at a voltage of 220 V was investigated using Andrew s body model in water. The constructed circuit consisted of Andrew s body model. The voltages measured on a hand, breast, waist, were compared with the electric currents measured on the hand, breast, and waist considering the safety limit of an electric current passing through the body. From the results, it can be understood that the magnitude and wave of electric current passing through the body affect the heart s control of a signal, which directly affects the ventricle of the heart in detail. It comes from the simulation through the ATP -Draw program. This study could be useful in solving safety issues for the electric angle limit by measuring flooding body resistance, as well as the voltage and current passing through each part.
154kV 지중송전케이블에서 Wavelet을 이용한 Fault Location에 관한 연구
이준성,문성철,이종범,Lee, Jun-Seong,Mun, Seong-Cheol,Lee, Jong-Beom 대한전기학회 2000 전기학회논문지A Vol.49 No.12
This paper describes a fault location technique using wavelets in underground transmission power cable system. Estimation of fault location is performed using data smapled at two ends underground system. In the case of 50% fault of total underground transmission line, fault location is calculated using sampled single-end data in underground transmission line. Traveling wave is utilized in capturing the travel time of the transients along the monitored lines between the relay and the fault point. This traveling time information is provided by the wavelet. Simulation was performed using EMTP, ATP Draw and MATLAB. The results of fault location shown in this paper will be evaluated as an effective suggestion for fault location in real underground transmission line.
비대칭 고장전류 저감 기능을 갖는 초전도 한류기 동작 방안
김창환(Chang-Hwan Kim),서훈철(Hun-Chul Seo),김규호(Kyu-Ho Kim),김철환(Chul-Hwan Kim),이상봉(Sang-Bong Rhee) 한국조명·전기설비학회 2014 조명·전기설비학회논문지 Vol.28 No.10
When fault currents contain decaying DC offset, the peak value of the fault current in the first cycle of the fault period is higher than the fault current during the steady-state period. To reduce the asymmetric fault current, this paper proposes an operation scheme using the series connection of two hybrid type Superconducting Fault Current Limiters (SFCLs) : an auxiliary SFCL and a main SFCL. The proposed method calculates the fault angle by comparing the zero-crossing time with fault detection time. According to the fault angle calculated, an auxiliary SFCL operates to reduce an asymmetric fault current during half a cycle after fault occurrence. After this process, the fault current is limited by a main SFCL. To confirm the usefulness of the proposed method, case studies using Electro-Magnetic Transients Program (EMTP)/Alternative Transient Program (ATP) Draw are perfomed.