• Proceedings of the KIEE Conference
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• 2007.04b
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• pp.110-113
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• 2007

전력 공급을 위한 송전 설비는 낙뢰 및 온도변화에 직접적인 영향을 받고 있으며, 이런 환경적 영향에 의해 안정적인 전력 공급이 어려운 실정이다. 환경 변화에 따른 송전선의 합리적인 운용과 안정성이 부각되면서 송전 설비를 관리하는 시스템의 도입이 필요한 실정이지만, 막대한 건설비용과 운용시 발생하는 전자파 문제 등으로 인해 쉽게 적용하지 못하고 있는 실정이다. 이러한 문제점을 해결하기 위해서는 관리적인 측면과 경제적인 측면을 고려하여 환경 변화에 따른 송전선의 이상 변화를 감시하고 관리 할 수 있는 시스템의 도입이 필요하며, 본 연구에서는 이런 문제점을 개선하는데 역점을 두었다.

• Proceedings of the KIEE Conference
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• 2006.07c
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• pp.1556-1557
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• 2006

Since 1996, KEPCO has been operating a wide range lightning detection system, LPATS, and been accumulating relative application technics 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. In this paper, we would like to introduce about our system and its results.

• Proceedings of the KIEE Conference
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• 2006.07c
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• pp.1677-1678
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• 2006

전력계통의 과도현상 분석용으로 개발된 수치계산 프로그램인 EMTP (Electromagnetic Transient Program)를 사용하여 건물내에 낙뢰에 의한 뇌서지가 침입했을 때 건물 전체에 surge current가 어떻게 확산되어 가는지를 분석해 본다. 이러한 현상을 분석하기 위해서 건물의 등가회로를 $\pi$-회로로 구현하고, ANSI 규격에 맞는 뇌서지를 건물에 유입시켜서 그에 따른 건물 내부의 torrent 분포를 알아본다. 그리고, 건물 체적을 변화시켜 가면서 뇌 서지가 건물 내부의 전기기기에 미치는 영향을 해석해 본다.

• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.841-843
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• 1996

This paper presents efficient protection countermeasure against lightning and surge for the control & instrumentation equipment using TVSS(transient voltage surge suppressor) and TEC(transient earth clamp). We propose the zone protection technique with TVSS and the use of TEC for clearing potential difference between frame ground and signal ground.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.186-188
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• 1993

This paper reports a status of KLDN(Korean Lightning Detection Network) SYSTEM in Korea, which was constructed by KMA(Korean Meteorological Administration) & KERI(Korean Electrotechnology Research Institute). At first, system configuration was introduced, and then lightning location data between August/1992 & April/1993, which was obtained in KLDN SYSTEM, was analyzed statistically. Finally, we show the future research planning in relation with this KLDN SYSTEM.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.588-589
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• 2007

전력계통은 송전선로, 발전기, 변압기 등의 다양한 요소들로 구성된다. 이러한 전력계통 내에서 스위칭 또는 낙뢰 등에 의해 과도현상이 발생할 경우, 고려해야 할 정도의 과전압이 발생하며, 이의 분석은 매우 중요하다. 본 논문에서는 전력계통 과도해석 프로그램인 EMTP-RV를 사용하여 발전기와 주변압기 연계 계통을 모델링하고, 계통 내에서 발생하는 과전압을 모의하였다. 또한 발생한 과전압이 제어회로에 미치는 영향을 모의하고, 분석하였다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.6
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• pp.702-707
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• 2018

In case of Lighting occurs in Domestic combined distribution line, normally the voltage for the neutral line increase dramatically. General connection for underground cable is bundled common earth type so the lightning over voltage increase at the concentric-neutral line is not big enough to give impact on cable sheath. But in case of Non bundled common earth type it is necessary to analyze the phenomena on cable sheath caused by lightening overvoltage. Especially pole and cable joint are the core factor to consider. In this paper concrete pole and cable joint were evaluated in case of Non bundled common earth type combined distribution Line. EMTP simulation model has been designed and several case study were made. Also several experimental test were made to verify the simulation result.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.500-503
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• 2006

This paper gives a Wireless lightning detecting and warning system. This system composed of transmitter and receiver. It promptly senses lightning strikes on the power lines and transmission towers by using the lightning current detection circuit in a small transmitter situated on the top of power tower, and it sends the number of lightning strikes and the ID. of the tower to patrols through the receivers. This system will be used to discover the exact location of a lightning strike.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.05a
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• pp.340-343
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• 2009

Recently, the lightning damage to human and structure is increasing steadily and many countries try to reduce lightning-caused casualties and economical loss through special disaster management system. The organization of warning system and management system for lightning damage in developed countries were investigated in this paper. The organization of central government for disaster management and cooperation system with local government in USA, Japan, the Britain, and Germany were introduced and the division of roles with meteorological administration were described.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.2
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• pp.247-252
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• 2016

The latest offshore wind turbines are easily exposed to lightning strikes because they are designed with longer blades and taller height to satisfy the growing capacity demands. The generation facilities and elements of the offshore wind farm are more vulnerable to lightning damage because of more severe, unpredictable weather conditions. Therefore, this paper presents the analysis of measure for lightning overvoltage mitigation in offshore wind farm planned in South Korea southwest seashore. The sensitivity analysis includes the steady state and transient state characteristics of offshore wind farm and proposes the countermeasure for mitigation of transient overvoltage by considering earth resistivity of the offshore environment.