Abstract
The distribution characteristics of space charge in the axial and radial direction of the cable at the stress cone were tested in paper. The 10kV XLPE cable was aging under electrical-thermal aging to explore the rule of the space charge distribution along the electric heating aging and the formation mechanism of the space charge accumulation at the stress cone. In the axial direction, the position of the maximum space charge density is at the inner edge of the cable stress cone, about 2cm. With the increase of aging time, space charge density at the stress cone is gradually increased and extend range. The accumulation of space charge from the outside to the stress cone is the cause of the space charge accumulation. The study of space charge accumulation at stress cone can help discover the essential explanations for the failure of cable accessories. It has practical significance for prolonging cable life and effectively diagnosing cable faults.
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