• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.779-783
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• 1992

In recent years, it is strongly required to supply high quality electrical power without insulation failure in distribution power cables. Therefore the exact measurement and judgment ar out deterioration degree of cables are essential to increase that supplying reliability. This paper will introduce various diagnostic methods of off-line and live-line cables also propose the judgement criteria and newly trend of diagnostic technique at present.

• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제49권10호
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• pp.577-582
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• 2000

This paper analyze the interference problems, especially Ac corrosion when the gas pipeline is buried with power cable in the same submarine tunnel. This paper present the results of the study about interference mechanism(inductive coupling, conductive coupling, resistive coupling), AC corrosion, limitation of safety voltage, modeling of power cables, gas pipeline and grounding systems, analysis of induction voltage and optimal arrangement of power cables.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 C
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• pp.1356-1358
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• 1995

About 20 years have passed since cross-linked polyethylene(XLPE) came into practical use for power transmission cables. In 1969, We were the first to product 33kV XLPE insulated cables, and in 1984 produced XLPE cable for 154kV. To meet the increasing demand for electric power in large cities, and to improve reliability of the power supply, plans are being made to introduce ultrahigh-tension power cable for long distance underground lines in urban areas. Studies are currently under way to develop more than 154kV XLPE cables to meet increasing demand. In this paper presents the progress in the production and design of XLPE cables, and describes ways in which further improvements seems likely.

• Structural Engineering and Mechanics
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• 제11권2호
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• pp.185-197
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• 2001

This paper presents the effect of axial stretching on large amplitude free vibration of an extensible suspended cable supported at the same level. The model formulation developed in this study is based on the virtual work-energy functional of cables which involves strain energy due to axial stretching and work done by external forces. The difference in the Euler equations between equilibrium and motion states is considered. The resulting equations govern the horizontal and vertical motion of the cables, and are coupled and highly nonlinear. The solution for the nonlinear static equilibrium configuration is determined by the shooting method while the solution for the large amplitude free vibration is obtained by using the second-order central finite difference scheme with time integration. Numerical examples are given to demonstrate the vibration behaviour of extensible suspended cables.

• 한국초전도ㆍ저온공학회논문지
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• 제20권1호
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• pp.11-14
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• 2018

High Temperature Superconducting (HTS) power cables are capable of transmitting bulk power without any loss compared to conventional copper cables. The major challenge in the design of such HTS cables is the high stresses (electro-thermal/electro-mechanical) developed at high voltages, high currents and cryogenic temperatures. The safe and reliable operation of HTS cables involves lots of instrumentation for monitoring, measurement, control and safe operation. In principle, a four probe method for resistance (RTD PT-100) is used for temperature measurements at various locations of HTS cable. The number of connecting leads required for this is four times that of the number of sensors. The present paper discusses a novel way of connecting 128 RTD sensors with the help of only 14 leads using a cold electronics based multiplexer board. LabVIEW 11.0 software was used for interfacing and displaying the readings of all the sensors on computer screen.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 추계학술대회 논문집
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• pp.345-347
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• 2007

본 논문에서는 전력케이블 및 그 부속설비에 대한 사고원인을 분석한 사례를 서술하였다. 사고원인을 정밀하게 분석하기 위해서 케이블 외관의 육안검사 단계부터 케이블 해체 단계까지 전기적 검사 및 화학적 검사를 실시하였다. 분석결과, 전력케이블은 시공방법을 준수하지 않아서 수축튜브의 마감부위에 전계가 집중되어 가압 이후 지속적인 부분방전이 발생하여 케이블에 누적된 스트레스로 인해 발생한 고장으로 추정되었다.

• 한국전자통신학회논문지
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• 제2권1호
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• pp.34-39
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• 2007

해저광케이블은 대양을 횡단하는 국제통신의 대부분을 처리하고 있는 중요한 정보통신 전달매체이다. 하지만 이러한 해저광케이블 고장 발생시 막대한 수리 비용은 물론, 국제적 국가 신뢰도 추락, 통신 소통의 두절로 많은 어려움과 손실을 초래한다. 따라서, 본 논문에서는 해저케이블 안정성을 위한 방안을 도출하고자 국내외 해저광케이블 현황 및 고장원인을 분석한 후 고장 예방을 위한 기법과 해저시설 사용자간 보호 규정 마련을 제시하고자 한다.

• 전기학회논문지
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• 제57권11호
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• pp.1933-1937
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• 2008

XLPE insulated power cables are introduced in Korea in 1980s. The cable installation test has been carried out according to the Korean Technical Reference of Electrical Facilities. But recent research results shows DC Hipot test cannot detect the serious defects in XLPE insulated cables. VLF test is recommended as a installation test of XLPE insulated cables by CENELEC and IEEE standards in 1996 and 2001 respectively. We suggest to apply VLF test as an installation test for XLPE insulated MV cables in Korea.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.523-524
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• 2011

This paper covers induced voltage in parallel telecommunication cable with underground power cable to be linked between substations. The simulation was carried out the induced voltage in telecommunication cable according to the transposition of power cables and fault location for various conditions. This study based on the EMTP/ATPDraw with actual underground cable systems while the power cables are in steady state and transient state.

• 전기학회논문지
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• 제59권9호
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• pp.1593-1599
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• 2010

This paper describes the EMTP modeling method using searching coil test for HVDC submarine cables. HVDC submarine cables consist of conductor, lead sheath and amore. It is different from general cable which is composed with just conductor and aluminium sheath. Therefore, the transient characteristics are totally different between HVDC submarine cable and general cable. However, the study on HVDC cable modeling and transient are insufficient. In this paper, EMTP modeling is performed according to grounding interval and grounding resistance, then they are compared with real test results by searching coil test.