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A stress control body for plastic insulating high-voltage DC cable joints

A cable joint and high-voltage DC technology, applied in the direction of cable joints, etc., can solve problems such as difficulty in meeting the connection requirements of plastic-insulated high-voltage DC cables above 160kV, and achieve excellent homogenized electric field distribution, high DC breakdown strength, and reduced interface space The effect of charge

Inactive Publication Date: 2016-01-20
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of this invention is to solve the problem that the existing plastic insulated DC cable prefabricated joint structure is difficult to meet the connection requirements of plastic insulated high voltage DC cables above 160kV, and there is currently no mature design scheme for plastic insulated high voltage DC cable prefabricated joints above 160kV. A stress control body for plastic insulating high-voltage DC cable joints

Method used

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  • A stress control body for plastic insulating high-voltage DC cable joints
  • A stress control body for plastic insulating high-voltage DC cable joints
  • A stress control body for plastic insulating high-voltage DC cable joints

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specific Embodiment approach 1

[0023] Specific implementation mode 1: A stress control body for plastic insulated high-voltage DC cable joints in this embodiment is a stress control body for 160kV-500kV XLPE insulated high-voltage DC cable joints, and the 160kV-500kV XLPE insulation The stress control body for the high-voltage DC cable joint is composed of a high-voltage shielding layer, a reinforced insulator, a stress cone and an outer shielding layer. The ports on both sides of the reinforced insulator are trapezoidal, and the reinforced insulator is made of a conductance nonlinear insulating material; The conductance non-linear insulating material is liquid silicone rubber-based conductance non-linear insulating material, mixed silicone rubber-based conductance non-linear insulating material or EPDM rubber-based conductance non-linear insulating material;

[0024] The liquid silicone rubber-based conductance nonlinear insulating material is made of 100 parts of liquid silicone rubber and 10 to 20 parts o...

specific Embodiment approach 2

[0033] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the organic peroxide is benzoyl peroxide, di-tert-butyl peroxide, dicumyl peroxide or 2,5-di Methyl-2,5-di-tert-butylperoxyhexane, and others are the same as in Embodiment 1.

specific Embodiment approach 3

[0034] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the liquid silicone rubber-based conductance nonlinear insulating material consists of 100 parts by weight of liquid silicone rubber, 10 parts of nano-zinc oxide, 2 parts of nano-titanium dioxide, 5 parts of nano-silicon carbide, 0.5 parts of carbon nanotubes, 0.5 parts of conductive carbon black and 0.5 parts of nano-graphite, and the others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a stress control body for a plastic insulation high-voltage and direct-current cable connector, and relates to the stress control body for the cable connector. The stress control body for the plastic insulating high-voltage and direct-current cable connector aims at solving the problems that an existing plastic insulation direct current cable prefabricated connector structure hardly meets the requirement for connecting a plastic insulation high-voltage and direct-current cable prefabricated connector with the voltage over 160 kilovolts, and at present a mature plastic insulation direct current cable prefabricated connector design scheme does not exist. The stress control body for the plastic insulating high-voltage and direct-current cable connector is a stress control body for a cross linked polyethylene insulated high-voltage and direct-current cable connector with the voltage between 160kV and 500kV, and is composed of a high-voltage shielding layer, a strengthening insulator, a stress cone and an outer shielding layer, and two side end ports of the strengthening insulator are in a trapezoid shape. According to the stress control body, electric field distortion inside the prefabricated connector can be effectively reduced, the diameter of the prefabricate connector is reduced, the prefabricated connector is convenient to install, the heat dissipation property of the prefabricated connector is improved, and the stress control body can be applied to designing the plastic insulation high-voltage and direct-current cable with the voltage over 160 kilovolts.

Description

technical field [0001] The invention relates to a stress control body for cable joints. Background technique [0002] Compared with AC cables, high-voltage DC cables have obvious advantages in island power supply, large city power supply capacity expansion, wind power transmission, offshore oil and natural gas platform power supply, and independent grid connection. Plastic-insulated high-voltage DC cables have been widely used in foreign countries, but there is no plastic-insulated high-voltage DC cable line in operation in China. The research on plastic-insulated high-voltage DC cable joints started very late due to lack of application in China, and there is a lack of reference experience. The research is not in-depth. Plastic-insulated high-voltage DC cable joints include soft joints and prefabricated joints. There are domestic research reports and patents on 30kV plastic-insulated high-voltage DC cable prefabricated joints, but there are no reports on the design of plast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/08C08L83/04C08L23/16C08K13/04C08K7/00C08K3/04
Inventor 李忠华韩宝忠陈宇李长明
Owner HARBIN UNIV OF SCI & TECH
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