• 전기의세계
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• v.14 no.2
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• pp.53-55
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• 1965

본고의 내용은 다음과 같다. 1. 위상측정에 민감한 교직변환기 2. EHV 개폐시험 및 개폐써어지 3. 선형화에 의한 비선형 귀환계의 설계 4. 초도전재료의 응용에 관한 검토

• JOURNAL OF ELECTRICAL WORLD
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• no.10 s.154
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• pp.8-15
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• 1989

• Proceedings of the KIEE Conference
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• 1983.07a
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• pp.192-195
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• 1983

• Proceedings of the KIEE Conference
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• 1983.07a
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• pp.198-200
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• 1983

• Proceedings of the KIEE Conference
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• 1981.07a
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• pp.41-43
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• 1981

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.860-863
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• 2002

Recently, main nozzle and inner nozzle for EHV class gas circuit breakers were made by PTFE(Poly Tetra Fluoro Ethylen) for the basic material composite. But, nowadays strengthened PTFE was demanded because the supply of electric power increased. This paper shows the research results for nozzles according to the filler materials.

• Proceedings of the KIEE Conference
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• 2006.10d
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• pp.22-24
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• 2006

This paper presents the prediction method of small current interruption Performance for EHV gas circuit breakers. The FVFLIC method is used for the gas flow analysis and the FEM for the electric field analysis. Then, the dielectric withstanding voltage is evaluated by the empirical formulation or Streamer theory. By comparing the calculated dielectric strength with the test result. it is found that both methods show good prediction capability for the small current interruption performance. Especially, when both methods predict the same interrupting performance, the prediction is in accordance with the experimental result.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.55 no.4
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• pp.196-202
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• 2006

This paper presents a new magneto-thermal finite element analysis for predicting the temperature rise of the EHV GIS busbar. Joule's heat due to current flowing in the main conductor and the heat due to the induced eddy current in the tank are calculated by the magnetic field analysis. And these heats are used as the input data to predict the temperature rise for the thermal analysis. However, it is not easy to apply the heat-transfer coefficients on the boundaries for the thermal analysis. In this paper, the heat-transfer coefficients on the boundaries are analytically calculated by applying the Nusselt number considering material constant and model geometry for the natural convection. The temperature distribution in the busbar by coupled magneto-thermal finite element analysis shows good agreement with the experimental data.

• Proceedings of the KIEE Conference
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• 2001.07c
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• pp.1789-1791
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• 2001

Recently, Water Blocking Conductor have been used to basic specification at the EHV XLPE Cable, GlobalIy. The area of Middle East have need of severe test condition than existing the Water Penetration Test, specially. In this paper, compare with and investigate the Water Penetration Test's each standard, describes the development Water Blocking Conductor in the high water-pressure for the EDF HN 33-S-51's Water Penetration Test passing.

• Proceedings of the KIEE Conference
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• 1999.11b
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• pp.294-296
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• 1999

This paper describes the transient characteristics of air-gapped CTs in EHV transmission systems. An air-gapped CT is modelled using EMTP. Air-gapped CTs with the gap of 0, 0.5, 1.0 [mm] are analysed and compared with and without consideration of auto-reclosure. From the results. even small gap improves the transient characteristics after auto-reclosure.