Title :
Development of 500-kV XLPE cables and accessories for long distance underground transmission line. III. Electrical properties of 500-kV cables
Author :
Fukawa, Masami ; Kawai, Takayuki ; Okano, Yoshinori ; Sakuma, Susumu ; Asai, Shinya ; Kanaoka, Mamoru ; Yamanouchi, Hiroshi
Author_Institution :
Tokyo Electr. Power Co. Inc., Japan
fDate :
4/1/1996 12:00:00 AM
Abstract :
500-kV XLPE-insulated cable with an insulation thickness of 27 mm has been developed for long-distance transmission lines. Basic studies on 500-kV XLPE cable have shown that contaminants in the insulation may be the factor determining electrical performance. This hypothesis is justified by the good correlation obtained between statistical estimations of the size of the largest contaminant in the insulation and the electrical characteristics of full-sized cables. Voltage-withstand and long-term tests have confirmed the design values for minimum breakdown stress, for AC and impulse voltage, and for the degradation coefficients
Keywords :
XLPE insulation; electric breakdown; insulation testing; power cable insulation; power cable testing; power transmission lines; underground cables; underground transmission systems; 27 mm; 500 kV; AC voltage; XLPE cables; cable accessories; contaminants; degradation coefficients; electrical performance; electrical properties; impulse voltage; long distance underground transmission line; long-term tests; minimum breakdown stress; statistical estimations; voltage-withstand tests; Breakdown voltage; Cable insulation; Degradation; Dielectrics and electrical insulation; Electric variables; Impulse testing; Power transmission lines; Stress; Transmission line theory; Transmission lines; Underground power cables; Urban areas;
Journal_Title :
Power Delivery, IEEE Transactions on
