Title :
Correlation between AC breakdown strength and low frequency dielectric loss of water tree aged XLPE cables
Author :
Hvidsten, Sverre ; Ildstad, Erling ; Holmgren, Björn ; Werelius, Peter
Author_Institution :
Norwegian Univ. of Sci. & Technol., Trondheim, Norway
fDate :
1/1/1998 12:00:00 AM
Abstract :
This paper describes experiments performed on laboratory aged 12 kV and service aged 24 kV XLPE cable samples. Results from measurements of residual AC breakdown strength, degree of water treeing and dissipation factors are presented. The dissipation factor at low frequencies was determined by both time and frequency domain measurements. The relationship between these methods are discussed and it is shown that both can be used for assessing the average ageing state of the cable, The results show that water treeing causes reduced residual AC breakdown strength and high and nonlinearly increasing low-frequency dielectric loss
Keywords :
XLPE insulation; ageing; dielectric loss measurement; electric breakdown; electric strength; insulation testing; power cable insulation; power cable testing; trees (electrical); 12 kV; 24 kV; XLPE power cables; average ageing state assessment; dissipation factors; frequency domain measurements; laboratory experiments; low-frequency dielectric loss; residual AC breakdown strength; time domain measurements; water tree ageing; Aging; Breakdown voltage; Cable insulation; Dielectric breakdown; Dielectric losses; Electric breakdown; Frequency; Power cables; Testing; Trees - insulation;
Journal_Title :
Power Delivery, IEEE Transactions on
