XLPE electric cable accessory interface multi-stress coupling simulation test device and method

Abstract

An XLPE electric cable accessory interface multi-stress coupling simulation test device and method are disclosed. The device comprises a tensile stress applying device and a U-shaped electrical stressand interface pressure applying device, wherein the tensile stress applying device consists of a fixed support rack, a clamping tool, a fixed block, a drawing screw rod and a hexagon screw nut; a rubber test piece can be fixed and stretched for a long time via the tensile stress applying device; the U-shaped electrical stress and interface pressure applying device consists of a U-shaped electrodesupport rack, an interface pressure adjusting device, a high-voltage electrode, a grounding electrode, a spring device and a height adjusting device; the U-shaped electrical stress and interface pressure applying device can be used for applying electrical stress and interface pressure on a crosslinked polyethylene and rubber interface at the same time; the tensile stress applying device and the U-shaped electrical stress and interface pressure applying device are used in a cooperative manner, the electrical stress and the interface pressure can be applied on a crosslinked polyethylene and rubber interface, and mechanical stretching stress can be applied on the rubber test piece, multi-stress coupling working conditions of a electric cable accessory interface can be well simulated; maximumvoltage of 50 kV and maximum interface pressure of 0.5 MPa can be applied via the device; maximum stretch rates of the rubber test piece can reach 200%, and different interface conditions in which operation is normal or defects exist can be simulated.

Description

technical field

[0001] The invention relates to a cable accessory interface multi-stress coupling simulation test device, in particular to a test device and method for simulating the interface between the insulation of a cross-linked polyethylene cable body and the insulation of an accessory to withstand the coupling effect of electrical-mechanical stress in an actual operating state. Background technique

[0002] With the acceleration of urbanization, the improvement of material properties and the maturity of processing technology, cross-linked polyethylene cables are increasingly used in power transmission and distribution networks due to their superior insulation performance and cost-effectiveness. The overall prefabricated cable accessories are widely used in medium and high voltage XLPE power cables due to their good insulation performance and convenient installation; while silicone rubber and ethylene propylene rubber have good elasticity, corona resistance and electric...

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