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박중양(Joong-Yang Park),김학련(Hak-Lyun Kim),최규형(Kyu-Hyung Choi) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
According to the realization of highly information dependent society, the recent building system is developed into the concept of suitable for management of intelligent work, which is demanded to unify of IBS(Intelligent Building System), IC(information communication), OA(office automation), BA(building automation) system and computer technology. However inspite of the presence arrester, cable shielding, insulated TR, filter, earth etc., in the IBS building for the cope with several surge and noise has several problems from the wrong operation of the equipment which caused from several surge, damage of equipment, and noise etc. And the miss operation caused by wrong earth works, which must be considered at first during the building construction. In order to minimize these problems, it"s necessary that various earth project are performed effectively, and bonding methods between the mutual wiring of earth system and the equipments in the building should be improved successively. So in this paper, we analyze present domestic conditions of the earth technology in IBS building, and propose minimization method for the various surge and noise problem, and examine and analyze through the applied works.
장수용(Jang Su Yong),김학련(Kim Hak Lyun) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The electric facilities for subway stations require reliable and safe electricity in spite of their load increases rapidly. Nevertheless, Korea Electrical Safety Corporation reports that the accidents of independent electric facilities increased greatly from 4,632 cases in 1998 to 6,024 in 1999 and 6,776 cases in 2000, while the ratio of the accidents related with transformers grew gradually. As it is, it is deemed very important to minimize the spreading effects of the electric system accidents and thereby, enhance reliability of the electric supply as well as its safety. According to the fact that the electric facilities for subway stations are important for the public safety and conveniences, it should be careful to set their capacity instead of simply applying the general capacity standard to them, and thereby, improve their economy as well as prevent their accidents. With such a basic conception in mind, this study is aimed at analyzing the characteristics of the electric load in the subway stations and thereupon, suggesting some guidelines for setting of the electric facility capacity for subway stations in terms of optimal operation and safety.
전기철도 변전소의 직류고속도차단기 동작 감소방안에 관한 연구
허태복(Heo Tae-bok),김학련(Kim Hak-lyun),창상훈(Chang Sang-hoon) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper proposes a reduction method for the mis-operation analysis of the DC High Speed Circuit Breaker(HSCB) in electric railway substation system. The analysis method is based on present condition of operation which is a method for accuracy level up. There is reason to operation of HSCB that it is mis-operation of fault detection relay(50F), operation of ground fault relay(64P), and trouble of electric car. A countermeasure is relay resetting through field test, induction of GTOCB(Gate Tum Off Thyristor Circuit Breaker), HSVCB(High Speed Vacuum Circuit Breaker), coordination with electric car. The results presented in the paper can be used as a reference for maintenance free in electric railway substation system.
안홍기(Hong-Gi An),김학련(Hak-Lyun Kim),신명호(Myoung-Ho Shin) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
In this paper, in order to analyzing the thrust force of LDM, it was divided by the vatical force(Fx) and the horizontal force(Fy). The magnet and winding width was determined by analyzing the magnetic flux distribution throughout the airgap of LDM. Using finite-element analysis(FEA), which is the magnetic field analysis, and proved the validity of design process, also the characteristics of LDM according to the variation for the design parameters of LDM was almost in accord with th experiment results.