• 한국인터넷방송통신학회논문지
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• 제17권2호
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• pp.239-244
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• 2017

전력 수요는 매년 증가추세에 있으며, 이에 따라 발전소에서 동작하는 모든 장비들과 대용량의 장거리 전력수송을 위한 장비들은 신뢰할 수 있는 수준에서 완전한 상태로 동작하여야 한다. 발전소에서 생산한 고전압 전력을 전달하기 위해 사용하는 케이블은 주로 6.6 kV XLPE 케이블(또는 CV케이블)이다. 제작 기술, 설치환경 및 사용조건에 다르겠지만, 케이블은 동작함과 동시에 열화과정이 진행된다. 접속재의 경우, 제조 결함이나 공사 결함이 있는 경우 대체로 동작 후 약 3 년 내에 고장을 일으키며, 그렇지 않는 경우 수명이 20-30 년을 지속하는 경우가 많다. 우리는 케이블의 열화 상태를 감시하기 위한 장비를 개발하여 충남 태안의 한국서부발전주식회사(Korea Western Power Co. Ltd.)에 설치하였다. 우리는 이 논문에서 케이블의 열화 판정의 기준을 설정하고, 기준에 따른 열화정도를 판정하고, 케이블의 대체여부를 결정함으로써 발전소에서 설치된 활선 케이블의 동작 상태를 감시한 결과와 케이블을 구성하고 있는 절연체와 방식층이 절연저항 특성에 미치는 영향 및 케이블의 동작에 미치는 영향을 연구한 결과를 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 C
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• pp.2014-2016
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• 2000

In order to meet recent increasing demand for electric power in large cities, plans are being made to introduce 345kV lines into large urban areas. Up to now, OF cables have been used for 345kV fines, but nowadays XLPE insulated cables are preferred as they are easier to maintain due to phenomenal advances in plastic insulation technology, therefore cable manufacturing companies are trying to improve the performance and reliability of UHV CV cables and their accessories. For the purpose, our company has developed facilities for testing UHV cables. In this paper, we describes the methodology adopted for the design and development of a test termination, conducted the electrical test of UHV cables. Based on detailed analytical studies for electrical field distribution, the internal electrical design for the testing end has been carried out.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1993년도 춘계학술대회 논문집
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• pp.49-51
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• 1993

Recently, use of High Voltage cables with extruded insualtion is increasing. Generally this polymeric insuation contains residual stresses. The effect of internal residual stresses is the so-called shrink-back of the insulation. If not controlled, these stresses may lead to problems during installation and service of the cables. Therefore in this paper, the definition and cause of shrinkage are described and furthermore the influence due to shrink-back at cable joint-box.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기물성,응용부문
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• pp.19-21
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• 2003

In this paper, we studied on life-decision of underground cable of live-lines state. As all equipments have been wear, underground cables decided design-life on the whole 30 years because underground cable have been occurred aging as time goes. CV cable has been become about 30 years after installation in the South Korea, is come to a important point of time with estimation about life. Study target cable is 22 kV CV cables in this point of view and installation cable is about 10 years before and behind. Measurement method used dc leakage method of live-lines state that applied voltage of 50V in neutral point and data is analyzing result that is measured during 5 years. In this result, insulation resistance could confirm that change according to season and cause is effect of humidity, seasons and load current. Also, according as data is gone aging, insulation resistance by Weibull distribution could confirm functionally its decrease. As a result, the aging speed of cable that water tree is gone could confirm fastness very. Numerical analysis result, cable that water tree is not gone could confirm that life of cable that has passed 10 years remains about $10{\sim}20$ years.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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• pp.149-152
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• 2001

In this paper, aging diagnosis method of CV cable was investigated. CV cable was designed for the sake of using during 30 years. Therefore it was important to evaluate the cable's remaining life because CV cable used for power transmission line since 1970's. CV cable was mainly installed at the underground owing to the environmental condition. If the cable accident occurred, it needs the much time for the accident recovery and the much damage at the industrial activity. therefore, this paper should study the direct leakage current method, a sort of the cables' aging test method

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.149-152
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• 2001

In this paper, aging diagnosis method of CV cable was investigated. CV cable was designed for the sake of using during 30 years. Therefore it was important to evaluate the cable's remaining life because CV cable used for power transmission line since 1970's. CV cable was mainly installed at the underground owing to the environmental condition. If the cable accident occurred, it needs the much time for the accident recovery and the much damage at the industrial activity. therefore, this paper should study the direct leakage current method, a sort of the cables'aging test method.

• 조명전기설비학회논문지
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• 제24권10호
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• pp.78-84
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• 2010

This paper describes the safety assessment of power cable splices connecting different sized 6/10[kV] class power cables. To assess the safety, AC withstand voltage tests, partial discharge tests and impulse tests were carried out to the cable splice specimens and thermal rise due to overload and cross section of joint were examined as well. As a result, a breakdown due to the $4.5[U_0](27[kV_{ac}])$ application could not found for 5 minutes. Under $1.73[U_0](10.4[kV_{ac}])$ application, partial discharges of 4~8[pC] were detected. In impulse tests, all the specimens withstood to the standard waveforms of $75[kV_{peak}](1.2{\times}50[{\mu}s])$ without any breakdowns. In addition, the temperature on the splice rose by $3[^{\circ}C]$ when the 200[A] flew through the splice for 20minutes, however the thermal rise of $3[^{\circ}C]$ was considered due to the atmospheric temperature. After all the electrical tests, the cross section of the splice was visually examined. The conditions of the conductors of both $185[mm^2]$ and $240[mm^2]$ were good.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1831-1834
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• 1996

Diagnosis of cable insulation degradation has important meaning from a viewpoint of reliability enhancement of CV cable systems. So, we diagnosed 3.3kV & 6.6kV CV distribution cable on live-line which is judged to a most poor installation condition because they have been used in water condition after installation at the Yeochon chemical complex. The paper describes the analysis of the measured data, the problems at diagnosis, and the items which are considered at the development of diagnosis technology and equipment hearafter.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 B
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• pp.636-639
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• 1993

This paper is discribed the results of insulation characteristic tests that are DC leakage current, test, tan${\delta}$ test, AC breakdown test and observation of tree in the used 6.6kV CV cables. In the correlation of these tests, the tan${\delta}$ test stands for the main deterioration factor of cable insulation.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 C
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• pp.1296-1298
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• 1995

This paper presents the power cable with the concentric neutral wires of S-Z stranding. This type Cables, 22.9KV CN/CV Cables used in the distribution systems have been developed in order to improve bend, bend after torsion and tension charateristics. We have designed and made S-Z stranding machine, testing equipment etc., and have established the manufacturing technology of the equipment and the testing technology.