• 한국전기전자재료학회논문지
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• 제22권2호
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• pp.178-183
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• 2009

This paper introduces experimental investigates of an accident pattern for the distributing cross linking-polyethylene(XLPE) cable terminations considering product liability(PL) law environment. The influence of defects such as thickness and length decrease of XLPE, an impurity on XLPE and the gap between stress-con of housing and semi-conductor on insulating properties of the termination have been studied. The thickness and length decrease of XLPE decrease ac breakdown strengths. Breakdown traces of XLPE that is damaged by knife displayed ellipse shape. The gap of between stress-con and semiconductor deteriorates dielectric strength of XLPE seriously.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 D
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• pp.1407-1409
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• 1998

It was investigated that space charge characteristics and Breakdown characteristics of XLPE/EPDM laminates as a function of interfacial condition. When the chemical A was pasted in laminate interface, there was little space charge in XLPE/EPDM interface and it was shown that breakdown strength of XLPE/EPDM laminate was influenced by laminate condition.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1425-1427
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• 2002

Degree of crosslinking of insulation is very important factor that is determined characteristics of XLPE insulated power cable. Increase of degree of crosslinking is closely related to increase of mechanical characteristics of XLPE insulated power cable. In this study, mechanical characteristics of XLPE insulation for degree of crosslinking was analyzed tensile strength and elongation of insulation. As the result, mechanical characteristics of insulation for degree of crosslinking was divided three cases.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 추계학술대회 논문집 학회본부 C
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• pp.431-433
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• 2000

In this paper, we evaluated the dielectric properties and thermal analysis on sliced XLPE sheet from 154kV power cable and compared with 22kV XLPE sheet. As the result, dielectric constant was not applied voltage dependance but trended to increase with temperature. Test result presented that tan$\delta$ of XLPE with Interface was trend to increased.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.215-218
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• 1998

XLPE/VLDPE (Crosslinked polyethylene/very low density polyethylene) blends were prepared by a twin screw extruder and their electrical properties such as water tree and breakdown characteristic were measured. it was found that both water tree and breakdown characteristics of XLPE were improved by the addition of VLDPE to polyethylene. It was also found that the extent of improvement of electrical properties by the addition of VLDPE to polyethylene depends on the type and concentration of VLDPE.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 추계학술대회 논문집
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• pp.495-497
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• 1999

In order to determine what influences the interfacial breakdown in EPDM/XLPE laminates, We made the breakdown test ceil and this was pressure controllable breakdown test cell. We make the needle electrode (tip radius: about 10 micrometer) using electrochemical method. We studied the interfacial silicone oil was higher than that with silicone grease. As a function of heat treatment time in a vacuum, interfacial breakdown strength increased much in XLPE/EPDM laminates pasted with silicone grease but increased a little in that with silicone oil.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 Techno-Fair 및 추계학술대회 논문집 전기물성,응용부문
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• pp.141-142
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• 2008

국내 지중송전선로는 주로 XLPE케이블과 OF케이블로 구성된다. 1971년 154kV급 OF 케이블이 최초로 한전에 의해 상용운전에 들어간 후 XLPE 케이블 지중선로가 1983년부터 병용운전 되고 있으며 OF케이블의 경우 절연유의 사용으로 인한 화재의 위험과 환경오염 문제 등으로 인하여 점진적으로 XLPE케이블로 대체되는 추세에 있다. 하지만 내전압 시험, 절연저항이나 누설전류 측정, $tan{\delta}$ 측정 등으로 진단이 가능했던 OF케이블과는 달리 XLPE케이블의 경우 종래의 시험을 통한 진단은 한계가 있고 부분방전을 통한 진단이 가장 효율적인 진단방법으로 제시되어 국내외 XLPE케이블의 진단을 위해 운영되고 있으며 보다 정확한 PD측정을 위한 연구가 계속 진행되고 있다. 지난 10년여간의 국내외 연구결과 XLPE케이블에 대한 PD 측정기술의 정확성은 상당히 향상되었고 그 결과물로서 수많은 폭정 장비와 기법이 개발되어 오늘날 널리 보급되고 있다. 하지만 여전히 측정된 Data에 대한 해석은 일부 전문가들에게 조차 복잡하고 어려운 일로 남아 있다. 자칫 그릇된 해석은 향후 큰 사고로 이어질 수 있으므로 선로 운영자의 입장에서는 측정결과의 신뢰성에 민감할 수밖에 없다.

• 한국전기전자재료학회논문지
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• 제29권1호
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• pp.50-57
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• 2016

Transmission equipment is mainly used for the XLPE (cross-linked polyethylene) insulation cable for ultra high voltage power to minimize power loss. The experiment examined the partial discharge characteristics according to the insertion of the bar electrode and needle electrode into the XLPE specimen and the air voids. XLPE insulation cable manufactured by T. company and tungsten electrode material by K. company were used for specimens, by adhering conductive tape on the semi-conductive material of the lower electrode of XLPE specimen with the dimension of $16{\times}40{\times}30$ [mm] was used as negative electrode. In order to investigate the PD with ${\phi}$-q-n of XLPE specimen according to the electrode shape and the size of air voids. we examined the PD by varying the voltage after applying voltage of 3~20 kV on the electrode. Therefore, it was confirmed from the result of PD characteristics of specimen that the larger the air void than the gap between electrode (+) and electrode(-), the larger effect on the discharge when the bar electrode and needle electrode inserted into XLPE, and the closer the distance between the insulation and the needle electrode, the faster insulation breakdown.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1602-1604
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• 1999

Crosslinked polyethylene/silane crosslinked polyethylene (XLPE/SXLPE) blends were prepared by a twin screw extruder and their water tree and crosslinking characteristics were investigated. The water tree characteristics of XLPE were improved by the addition of SXLPE, when samples were cross- linked only by the thermorolysis of DCP (dicumyl peroxide). However, steam curing process was not good for water tree characteristics. It was also found that the degree of crosslinking of XLPE/SXLPE blends were higher than that of XLPE.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1575-1577
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• 1999

XLPE is widely used as a main insulation in EHV power cables, deeply connected with thermal stress. In this study, the thermal history of XLPE insulation was examined using DSC(Differential Scanning Calorimetry). The principle is on the basis of the phenomenon that crystal in polyethylene is rearranged as it is annealed near/below the melting temperature. From the result, it was possible to define accurate temperature which was really applied on the XLPE insulation and this method was assured as a useful tool in characterization of thermal history in XLPE cable insulation.