• 제목/요약/키워드: CV cable

검색결과 63건 처리시간 0.025초

열화 진단 평가를 위한 직류 누설법의 활용 (APPLICATION OF DIRECT LEAKAGE CURRENT METHOD FOR AGING DIAGNOSIS EVALUATION)

  • 이관우;박대희
    • 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

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열화 진단 평가를 위한 직류 누설법의 활용 (APPLICATION OF DIRECT LEAKAGE CURRENT METHOD FOR AGING DIAGNOSIS EVALUAT10N)

  • 이관우;박대희
    • 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.

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6.6kV 철거 CV 케이블의 잔존 절연 특성 (Residual Insulation characteristics of long-term serviced 6.6 kV CV Cable)

  • 백주흠;김동욱;한기만
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1994년도 춘계학술대회 논문집
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    • pp.46-49
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    • 1994
  • In order to investigate possibility of CV cable diagnosis technique, residual insulation characteristics of .long - term serviced 0.6 kV CV Cable are examined by DC leakage current residual voltage tensile strength, cross1inking density and AC & impulse breakdown. Also effect of cable structure and water tree are reported

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22.9kV CV 전력케이블의 14주기 고온 열화에 대한 교류파괴특성 (AC Breakdown Characteristics for 22.9kV CV Power Cable Before and After Cyclic Aging for 14days)

  • 윤대혁;김위영;박민호;박태곤
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 하계학술대회 논문집
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    • pp.601-604
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    • 2001
  • 22.9 kV CV power cable is very important factor of underground distribution power line. Cyclic aging for 14days is performed to remove a large amount of the volatiles found in freshly manufactured cable. In this paper, we examined AC breakdown characteristics of CV power cable before and after cyclic aging for 14days. As the result, even if there were some exceptions, the AC breakdown voltage before aging was lower than that after aging, but most of the results were that the AC breakdown voltage after aging was lower than that before aging.

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CV케이블의 부분방전 신호를 통한 열화과정의 정량적 진단 (Normalization Diagnosis of Aging Process on Partial Discharge Signals of CV Cable)

  • 소순열;임장섭;김진사;이준웅;김태성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1997년도 추계학술대회 논문집
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    • pp.451-455
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    • 1997
  • The partial discharge has been blown as the chief breakdown of power equipments. The analysis and the recognition is much difficult because the partial discharge signal is very small and has complex aging pattern. Recently, insulation aging diagnosis based on pattern of phase(Ф), partial discharge magnitude(q), number(n) has been very important. Owing to depreciate the reappearance of aging progress at the electrical tree pattern and to be difficult to analyze visually, the study on partial discharge pattern is suggested to normalizing analysis method of partial discharge signals. This parer is purposed on prediction of life-time measurement of cv-cable, on decision of risk degree with normalization and real-time measurement of partial discharge signals for aging diagnosis of cv-cable. As normalizing the aging signals of electrical tree in cv-cable, it is able to confirm risk degree of insulation material with the distribution of Ф-q-n and recognize the process of aging pattern using neural network.

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배전용 CV케이블의 현장 열화진단 결과의 고찰 (A Study on the Results of the diagnosis of Insulation Deterioration in Live-Line Distribution Power Cables at the Field)

  • 유성종;전승익;정석윤
    • 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.

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22kV 전력케이블의 열화 판정에 관한 연구 (A Study on the Remain Life with Aging in 22kV CV cable)

  • 이관우;목영수;김보경;박복기;박대희
    • 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.

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345kV CV 케이블 접속함의 Proto Type 선정 (Determination of Proto Type for 345kV CV Cable Accessories)

  • 이수길;김인태;손시호;최수걸;허근도;박완기
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1998년도 하계학술대회 논문집 E
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    • pp.1629-1631
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    • 1998
  • Crosslinked polyethylene (XLPE) insulated cables are now widely used all over the world for extra-high voltage underground transmission systems. Prefabricated type (compression type) joint has developed in order to shorten the assembly time and lower the possibility of contamination at site by many companies in the world. For outdoor termination, to control the electric field distribution as uniform as possible, especially for the use of extra-high voltage system. much of products are adopting the oil-impregnated condensor cone type instead of electric field control element which uses the permitivity of it only (not capacitance). For Gas-immersed termination, dimension of outer insulation bushing was determined by IEC Publication 859. The highest voltage of underground power cable system is 345kV now, in Korea. We have much of experiences of the development of prefabricated type accessories for CV cable systems (154kV, 161kV, 230kV level). So it was possible to inspect the proto type of accessories for 345kV CV cable system and seems that the need time for the development of products is reduced.

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옥외전기시설물에 사용되는 600V CV케이블 정전용량의 영향 (Effect of the Capacitance for 600V CV Cable Applying Outdoor Electricity Facilities)

  • 이현구;하태현;배정효;김대경;김석원;이지인
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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    • pp.323-325
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    • 2002
  • Because of the progress of civilization, outdoor electricity facilities as a street light, signal light and standing signboard etc. have being increased rapidly. Therefore the application of underground distributing wires is largely expended. In this paper, capacitance for the kinds of 600V CV cable is measured and leakage current for underground cable is calculated. The measurement of capacitance is done which there are defects of cable sheath or not Calculated leakage current is applied to choose the circuit breaker and the like.

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