Title :
Research for remained life of 22 kV CV cable system in live-line state
Author :
Lee, K.W. ; Mok, Y.S. ; Kim, B.K. ; Choi, Y.S. ; Park, D.H.
Author_Institution :
Wonkwang Univ., Ihksan, South Korea
Abstract :
In this paper, we studied on life-decision of underground cable of live-lines state. As all equipments have been expected life, 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 the 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 50 V 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, reduction of insulation resistance by Weibull distribution could confirm. As a result, the aging speed of cable that water tree is gone could confirm very fastness. Numerical analysis result, cable that water tree is not gone could confirm that life of cable that has passed 10 years remains about 10-20 years.
Keywords :
Weibull distribution; ageing; numerical analysis; power cable insulation; power cable testing; trees (electrical); underground cables; 22 kV; 50 V; CV cable system; DC leakage measurement method; South Korea; Weibull distribution; aging; insulation resistance; numerical analysis; remaining life estimation; underground cable; water tree; Aging; Data analysis; Electrical resistance measurement; Humidity; Life estimation; Power cable insulation; Power cables; Trees - insulation; Voltage; Weibull distribution;
Conference_Titel :
Power Modulator Symposium, 2004 and 2004 High-Voltage Workshop. Conference Record of the Twenty-Sixth International
Print_ISBN :
0-7803-8586-1
DOI :
10.1109/MODSYM.2004.1433620