Title :
Correlation between space charge distribution under DC voltage and dielectric breakdown properties in XLPE under impulse voltage superposed onto DC voltage
Author :
Takeda, Toshinao ; Suzuki, Hiroshi ; Okamoto, Tatsuki
Author_Institution :
Central Res. Inst. of Electr. Power Ind. (CRIEPI), Yokosuka, Japan
Abstract :
Describes breakdown tests under DC long term application measuring space charge in XLPE. The time transition of space charge showed that dielectric breakdown cannot be explained by only the local maximum electric field in the bulk, but should be considered as the deterioration of insulating material caused by the increase of carrier density. In order to make a rational insulating design method for DC XLPE cables, space charge distribution immediately before dielectric breakdown under impulse voltage superposed DC voltage is studied. Correlation between the space charge distribution immediately before dielectric breakdown by DC impulse superposed voltage and the dielectric breakdown strength are discussed in this report
Keywords :
XLPE insulation; electric breakdown; insulation testing; power cable insulation; power cable testing; space charge; DC voltage; XLPE; breakdown strength; carrier density; dielectric breakdown properties; impulse voltage; local maximum electric field; power cables; space charge distribution; time transition; Breakdown voltage; Charge measurement; Current measurement; Dielectric breakdown; Dielectric materials; Dielectric measurements; Dielectrics and electrical insulation; Electric breakdown; Space charge; Testing;
Conference_Titel :
Electrical Insulating Materials, 2001. (ISEIM 2001). Proceedings of 2001 International Symposium on
Conference_Location :
Himeji
Print_ISBN :
4-88686-053-2
DOI :
10.1109/ISEIM.2001.973711
