Decreasing space charge accumulation in polyethylene with an inorganic filler

• Published in: Journal of electrostatics Vol. 42; no. 1; pp. 219 - 225
• Main Authors: Wang, Shinan, Fujita, Michimoto, Tanimoto, Gen, Aida, Fumio, Fujiwara, Yasutaka
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.1997
• ISSN: 0304-3886; 1873-5738
• DOI: 10.1016/S0304-3886(97)00150-2

The applicability of polyethylene polymerized using a metallocene catalyst as an insulation material for DC XLPE cables has been investigated. The space charge distribution was examined using the pulsed electroacoustic technique over a temperature range from room temperature to 90°C. Hetero-charge was observed near the surface of the sample at higher temperatures. Hetero-space charge, produced by ionization derived from activation of an antioxidant added to the sample, either increased or decreased with increasing temperature of the sample. A hetero-charge absorber was added to control the hetero-space charge. As a result, hetero-charge was not observed in the sample under a high electric field for temperatures extending from room temperature to high temperatures and the DC breakdown strength at 90°C was increased. It was confirmed that the volume resistivity of the sample increased at high temperature.