AC cable termination joint using nonlinear prefabricated rubber stress cone

Abstract

The present invention proposes an AC cable termination joint using a nonlinear prefabricated rubber stress cone, which belongs to the design field of high-voltage AC cable accessories. The AC cable termination joint includes a cable termination joint body composed of a silicone rubber insulating base and a silicone rubber insulating umbrella skirt, a cable conductor link fitting, a sealing cap and a nonlinear prefabricated rubber stress cone, wherein the conductive or semiconductive part of the stress cone is compounded of silicon rubber and carbon black; and the insulating part of the stress cone is compounded of zinc oxide ceramic powder particles and silicon rubber using a nonlinear conductive composite material. The cable termination joint of the present invention enables the scope of application of the voltage class of the prefabricated rubber stress cone to be further enlarged, which is not only applicable to low-voltage-class cable termination joints, but also plays a good role of homogenizing field intensities for high-voltage-class cable termination joints; and meanwhile, not only solves the problem that the field intensity is concentrated at the notch of a cable shielding layer but also solves the problem that the field intensity is concentrated at the cone surface of the stress cone, thereby improving the reliability of the long-time running of a power cable system.

Description

technical field [0001] The invention belongs to the design field of high-voltage AC cable accessories, and in particular relates to an AC cable end using a nonlinear prefabricated rubber stress cone. Background technique [0002] With the continuous increase of social electricity consumption and the vigorous development of clean energy, people need to transmit more electricity to densely populated areas. On the one hand, clean energy sources are mostly located in remote areas or areas such as the sea, and traditional overhead lines are no longer suitable for transporting electrical energy to areas where electricity is concentrated. On the other hand, the use of space resources and the emphasis on urban beauty in densely populated cities make it no longer suitable for overhead lines to transmit electric energy. Therefore, it is necessary to adopt a power transmission method with a higher transmission capacity to meet people's electricity demand. For densely populated areas s...

AI Technical Summary

Problems solved by technology

Among them, the prefabricated rubber stress cone is prefabricated in the factory as a whole, and its characteristics determine the uniform effect of the cable terminal field strength. The insulating part of the traditional prefabricated rubber stress cone uses a dielectric with fixed conductance, such as silicone rubber. The field strength is uniform, but the field strength concentration phenomenon will appear at the stress cone surface, which poses a threat to the long-term operation reliability of the power cable system

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