• Proceedings of the KIEE Conference
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• 1992.07b
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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.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.49 no.10
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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.

• Proceedings of the KIEE Conference
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• 1995.07c
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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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• v.11 no.2
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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.

• Progress in Superconductivity and Cryogenics
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• v.20 no.1
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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.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.11a
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• pp.345-347
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• 2007

This paper describes a case study on the failure cause analysis of power cables and their fittings. For more accurate analysis, electrical and chemical analysis techniques were employed from the macrography stage for the exterior of the cables to the entire disassembly stage. As a result it was confirmed that the power cables failed due to improper fabrication by which electric field was concentrated at the deadend of a shrink tube on the cable.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.1
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• pp.34-39
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• 2007

Submarine cable is the leading means of international communication across oceans. However, when such important submarine cable is damaged, that causes not only huge amount for the repair but also losing the nation's reliability internationally, and has brought about much difficulty and loss due to the interruption of communication. So, in order to deduce methods for the stability of submarine cables, this paper is studying the present status of submarine cables and the causes of cable faults, and suggesting techniques and regulations to protect from the trouble of submarine cables.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.57 no.11
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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.

• Proceedings of the KIEE Conference
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• 2011.07a
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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.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.59 no.9
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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.