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

A cable accessory and simulation test technology, applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., to avoid slippage and achieve the effect of high tensile strength

Active Publication Date: 2018-12-07
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the research on the interface of cable accessories mostly focuses on the partial discharge behavior, the interface electric tracking phenomenon and its mechanism, the electric tree branch phenomenon and its influencing factors, and most of these studies only consider the effect of a single electric stress

Method used

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

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Embodiment 1

[0038] Taking the interface multi-stress coupling simulation device during normal operation of XLPE cable accessories as an example, the technical solution involved in the present invention is described in detail. The structural diagram is as follows figure 1 As shown, the device can apply electrical stress, interfacial pressure, and tensile stress simultaneously.

[0039] refer to figure 1 , figure 2 and image 3 As shown, the XLPE cable accessory interface multi-stress coupling simulation test device of the present invention adopts a tensile stress application device 1 and a U-shaped electrical stress and interface pressure application device 2. First, the rubber test piece 2.5 is passed through the tensile stress application device 1 twice. The first clamp 1.4 and the second clamp 1.5 on the side are fixed on the tensile stress application device 1, and the tension is adjusted by the first hexagonal nut 1.8 and the second hexagonal nut 1.9 on both sides of the tensile st...

Embodiment 2

[0043] Taking the multi-stress coupling simulation device for XLPE cable accessory interface defect discharge as an example, the technical solution involved in the present invention is described in detail. The device can apply discharge stress, interface pressure and tensile stress at the same time.

[0044] The structure of the multi-stress coupling simulation device in the XLPE cable accessory interface defect discharge in this example is similar to the structure in the first embodiment, using the tensile stress application device 1 and the U-shaped electrical stress and interface pressure application device 2, the tensile stress Applicator 1 and the two devices cooperate in exactly the same way, but U-shaped electric stress is slightly different from interface pressure applicator 2. The difference is reflected in the treatment of the sample. In this example, the lower surface of the cross-linked polyethylene test piece 2.4 is artificially manufactured with a cuboid depressio...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 曹俊平王少华刘英汪行高鑫
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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