• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1993.10a
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• pp.490-494
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• 1993

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.6
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• pp.60-62
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• 2014

• The Magazine of the IEIE
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• v.23 no.7
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• pp.103-109
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• 1996

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.6
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• pp.29-32
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• 2013

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.1
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• pp.40-43
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• 2015

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.1
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• pp.100-105
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• 2007

Signalling equipments at railroad sites are widely exposed to high voltage lightning surges. This paper presents a lightning protection system for the signalling equipments at subway car depots. The main features of the system are as follows : (1)the common grounding system between power system grounds and the signaling system grounds, (2)physical and chemical methods to reduce grounding resistivity, (3)rearrangement of lightning rods based on the rolling bal1 theory, (4)equi-potential bonding networks to minimize the potential differences between the equipments grounds. The system has been constructed at six subway car depots in Seoul metropolitan area and it is measured that the grounding resistivity are reduced to 0.266 ohms and the potential differences between devices are reduced to a negligible quantity. After the construction of the systems, it has not been reported the break-down of the signalling equipments caused by lighting surges.

• Proceedings of the KIEE Conference
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• 2008.04b
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• pp.6-8
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• 2008

기상이변과 온난화 현상으로 인한 낙뢰의 발생빈도가 높아졌으며, 이로 인한 인적, 경제적 피해가 중가하고 있다. 또한 낙뢰 및 각종 서지에 약한 고도의 첨단 정보화 기기의 사용 증가로 인적, 경제적 피해가 광범위해져 피뢰설비의 적절한 설치가 현대사회에서 매우 중요한 부분이 되었다. 이에 WTO의 TBT협약에 의한 기술 부합화 차원에서 경제적이고 효율적인 피뢰설비 규격인 IEC 62305를 2007년 11월 30일에 KS C IEC 62305로 제정하였다. 그러나 실제 적용시 문제점이 드러났다. 본 논문에서는 KS C IEC 62305의 문제점을 파악하고 이를 해결하기 위한 방안에 대하여 설명하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.215-217
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• 2017

기술의 발달에 따라 무인표지에도 기존의 등명기 이외에도 Racon, Fog Detector, 전기폰, 기상 및 해양 관측장비, 휴대폰 중계기 등 전력을 필요로하는 다양한 장비가 설치되고 잇는 실정인데 반해, 현재의 무인표지 전력제어시스템은 기존의 관습대로 등대 내 협소한 구내에 축전지, 충방전 조절기, 전력선 등이 널 부러져 있는 상태로서 효과적인 전력관리와 능률적이고도 안전한 전력 관리를 위하여는 종합적 전력제어시스템 설치가 필요한 실정이다.. 이 연구에서는 현재 무인표지의 전력 시스템을 체계적이고도 안전한 방법으로 관리 할 수 있으며, 축전지 잔량표시, 저전압 충전시스템, 낙뢰피해 방지 및 원격 감시기능 등 기능적인 측면에서도 뛰어난 성능을 가질 수 있도록 무인등대용 표준전력제어장치를 연구 개발하였다.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.55 no.11
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• pp.527-531
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• 2006

Since 1996, KEPCO has been operating a wide range lightning detection system, LPATS, and been accumulating relative application techniques and statistical analysis skills. So, KEPRI already has its own basis to develope more accurate advanced detection technology and references to do comparative study. For three-dimensional imaging of lightning channels, UHF/VHF antenna systems were installed at 2 sites. The distance between two sites is about 30 km. These systems were used the AOA(Angle of Arrival) methods for lightning detection. In this paper, we would like to introduce about our system and its results.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.606-608
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• 2005

As the overhead transmission lines are exposed to the outdoor weather, the causes of the transmission lines faults are from natural conditions, and among these faults, the outage rate due to lightning is more than 60%. The lightning causes the damage of power system equipments, the shut down of electricity and the electro-magnetic interference. Therefore, the pertinent insulation design is important, not only to decrease the damage of the facility itself but also to increase the reliability of electric power system. For these reasons, we have to obtain and accumulate the lightning current parameters for the basic lightning research. This paper describes the statistical distribution of lightning current parameters and the IKL map.