• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.262-265
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• 2001

In order to investigate the water tree degradation behavior on XLPE cable, direct voltage of 200 to 800V has been applied to the material at 50$^{\circ}C$∼100$^{\circ}C$, and the water tree property has been correlated with voltage and temperature in this study. The leakage current was shown to increase as temperature increased and the Ohm's law was generally satisfied in this experiment though some experimental errors were found. The leakage current was shown to decrease and reach to the stable state with time. It was also shown that the time for the stabilization of leakage current was lessened as voltage increased

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1507-1508
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• 2006

XLPE 절연 전력케이블의 제조과정에서 발생하는 가교부산물을 제거할 목적으로 14주기노화를 실시하며, XLPE 절연체에 발생하는 수트리를 가속 발생 성장시킬 목적으로 가속수트리 열화를 실시한다. 22.9kV 트리억제형(TR CNCV-W) 케이블에 대하여 14주기노화 전과 후, 120, 240, 360일 가속수트리(AWTT) 후의 파괴전압을 분석하였다. 14주기노화는 상승효과와 감소효과가 비슷하게 작용하는 것으로 나타났으며, 240일 AWTT 이후에 노화가 가속되는 것으로 나타났다.

• 한국인터넷방송통신학회논문지
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• 제16권5호
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• pp.185-190
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• 2016

국내 발전소에서 운전 중인 XLPE 케이블(또는 CV케이블)은 많은 경우 포설된 지 40년에 이르고 있다. 설치 후 운전 상태에 있는 대부분의 CV 케이블은 6~8년의 기간이 경과하면 열화가 발생하기 시작하고, 근래에 포설한 케이블이라 할지라도 사고가 발생할 수가 있으며, 사고 발생으로 인하여 막대한 손실을 초래하게 된다. 사고를 미연에 방지하기 위하여 케이블의 동작상태를 정기적으로 감시 확인하여야 한다. 우리는 케이블의 사고를 체계적으로 감시 및 예방하기 위한 목적으로 측정 시스템을 개발하였다. 이 장비는 수 년 동안 충남 태안에 소재한 한국서부발전주식회사(Korean Western Power Co. Ltd.)에서 케이블의 동작 상태를 감시하고 있다. 이 논문에서 시스템의 기능 및 동작 원리를 소개하고, 터빈 발전기 부하용 XLPE 고압케이블의 절연층 절연상태와 습도의 상간관계를 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 C
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• pp.1685-1687
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• 2004

초고압 케이블의 절연물질로 널리 사용되고 있는 가교 폴리에틸렌의 전기적 특성은 라멜라 결정 조직의 밀도와 라멜라 조직의 성장방향과 밀접한 관련이 있는 것으로 알려지고 있다. 본 연구에서는 반도전 물질에 계면활성제를 첨가하고, 제조 온도를 제어하여 폴리에틸렌의 미세 조직을 변화시킴으로써, 라멜라 조직이 전기적 특성에 미치는 영향을 분석하였다. 전기적 특성은 절연파괴 전압을 측정하였고, TEM 분석을 통하여 폴리에틸렌의 모폴러지 분석을 하였으며, XRD 분석을 통하여 라멜라 조직의 밀도를 분석하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 전력전자학술대회 논문집
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• pp.175-179
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• 1998

The insulation of cable which used for Ultra-High Voltage(UHV) underground power transmission requires excellent insulation capability for high voltage. The typical insulation materials are used XLPE, EPR, etc, but insulation efficiency of these is affected by void or alien substances, existed at the inside of insulators. In this paper, the partial discharge patterns of the defects within insulation cable are observed and analyzed. In this test, void, fiber and metal inclusions which possibly exist in cables, are simulated and investigated the patterns of partial discharges for each models Also the relations between calculated field strength and the insulation breakdown voltage. The experiment shows distinct partial discharge patterns in accordance with the kinds of defects within Insulation cable.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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• pp.601-604
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• 2001

The insulation materials of cables used for underground power transmission requires a higher insulating capability. and the most popular method to examine the cable is partial discharge test due to applying variation voltage. In the thesis. air void. silicone oil. of which may possibly exist real cables. are simulated by Electra 2D program. Also the relations between calculated field strength and the void defect type in the cable joint materails. In the modeling. electic field inner to the cable joint material composed by XLPE and EPDM is modeling simulated. We obtained the electric field distribution in void due to two conditions.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1455-1457
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• 2002

The real-time dynamic rating system(DRS) can provide the maximum ampacity within required periods, so it can help the transmission-line operation more safely and efficiently. Because the conductor temperature is the main limit of increasing rating current, conductor temperature monitoring(CTM) technology is the basic to DRS. In this paper, real-time CTM was developed for 345kV XLPE cable in tunnel and we have also compared the CTM result of this study with the result according to IEC 287 and JCS 168 thermal parameters.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.494-496
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• 2001

This paper describes sheath induced voltage and operating characteristic of cable cover protection unit(CCPU) in underground transmission cable. Real cable system operating by 154kV XLPE cable was modelled for simulation. Sheath induced voltage and operating characteristic of CCPU were analyzed. In particular, sheath induced voltage was analyzed in case of individual grounding and common grounding, respectively, and operating characteristics of CCPU were compared each other.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 E
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• pp.1853-1855
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• 1997

This paper describes the characteristics of partial discharge generated by conducting particle in cable splice using ultrasonic method. For simulating partial discharges generated by defects, outer semi conductor of cable splice as ring share electrode was used. The conductive particle was attached on the surface of cable insulator(XLPE) to examine the affection of conducting particles in cable splice. The correlation between the partial discharge quantity and the magnitude of the ultrasonic signal was investigated as the number, length, diameter and alignment of particle when applied voltage increased.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.601-604
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• 2001

The insulation materials of cables used for underground power transmission requires a higher insulating capability, and the most popular method to examine the cable is partial discharge test due to applying variation voltage. In the thesis, air void, silicone oil, of which may possibly exist real cables, are simulated by Electro 2D program. Also the relations between calculated field strength and the void defect type in the cable joint materials. In the modeling, eclectic field inner to the cable joint material composed by XLPE and EPDM is modeling simulated. We obtained the electric field distribution in void due to two conditions.