Stress control body for plastic insulated high voltage DC cable terminal

A HVDC, cable termination technology, applied in cable accessories, cable installation, electrical components, etc., can solve the problems of lack of qualified plastic insulated HVDC cable termination, unreasonable electric field distribution, etc., to achieve excellent uniform electric field distribution, reduce The effect of small interfacial space charge, high DC breakdown strength

Inactive Publication Date: 2016-03-30
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of unreasonable electric field distribution and no qualified plastic insulated high voltage direct current cable terminals above 160kV in the existing design of plastic insulated high voltage direct current cable terminals, and to provide a stress control body for plastic insulated high voltage direct current cable terminals

Method used

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  • Stress control body for plastic insulated high voltage DC cable terminal
  • Stress control body for plastic insulated high voltage DC cable terminal
  • Stress control body for plastic insulated high voltage DC cable terminal

Examples

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specific Embodiment approach 1

[0019] Specific embodiment 1: The stress control body for plastic insulated high-voltage DC cable terminal of this embodiment is composed of a reinforced insulator and a stress cone. The stress cone is arranged at one side port of the reinforced insulator. The stress cone is horn-shaped and the stress cone is shaped like a horn. The inner cone curve is a cubic Bezier curve, and the other side of the reinforced insulator is a trapezoid; the plastic insulated high-voltage DC cable terminal is expanded with a stress control body and installed to the cable end;

[0020] The reinforced insulator is made of high-performance silicone rubber-based conductivity nonlinear insulating material or EPDM rubber-based conductivity nonlinear insulating material; the high-performance silicone rubber-based conductivity nonlinear insulating material is a compounded silicone rubber-based conductivity Non-linear insulating material or liquid silicone rubber-based conductive non-linear insulating materi...

specific Embodiment approach 2

[0025] Specific embodiment two: this embodiment is different from specific embodiment one in that the organic peroxide is benzoyl peroxide, di-tert-butyl peroxide, dicumyl peroxide or 2,5-dimethyl- 2,5-Di-tert-butylperoxyhexane. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: mixing silicone rubber-based conductive nonlinear insulating material is mixed with 100 parts by weight of silicone rubber, 19.5 parts of non-linear functional filler, 5~ 20 parts of fumed white carbon black, 0.5-3 parts of nano-iron trioxide, 0.5-5 parts of diphenyl silicon glycol and 0.5-1.5 parts of organic peroxide. The non-linear functional filler is made of 10 parts of nano zinc oxide, It is composed of 2 parts of nano titanium dioxide, 6 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. Other steps and parameters are the same as those in the first or second embodiment.

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Abstract

The invention relates to a stress control body for a plastic insulation high-voltage and direct-current cable terminal. The stress control body for the plastic insulation high-voltage and direct-current cable terminal aims at solving the problems that electric fields in an existing plastic insulation high-voltage and direct-current cable terminal are distributed unreasonably, and a qualified plastic insulation high-voltage and direct-current cable terminal with the voltage more than 160kV does not exist. The stress control body for the plastic insulation high-voltage and direct-current cable terminal is composed of a strengthening insulator and a stress cone, wherein the stress cone is arranged on one side end port of the strengthening insulator, the stress cone is in a horn shape, the curve of the inner conical surface of the stress cone is a tri-bezier curve, and the other side end port of the strengthening insulator is in a trapezoid shape. After the diameter of the stress control body for the plastic insulation high-voltage and direct-current cable terminal is expanded, the stress control body for the plastic insulation high-voltage and direct-current cable terminal is installed on the end portion of a cable. The stress control body for the plastic insulation high-voltage and direct-current cable terminal is applied to the electricity field.

Description

Technical field [0001] The invention relates to a stress control body for a plastic insulated high-voltage DC cable terminal. Background technique [0002] High-voltage DC cables have obvious advantages compared with AC cables in terms of island power supply, power supply expansion in large cities, wind power transmission, offshore oil and gas platform power supply, and independent grid connection. Plastic insulated high-voltage DC cables have been widely used abroad, but there is no plastic insulated high-voltage DC cable line in operation in China. The three XLPE insulated high-voltage DC cable lines that have just been approved in recent years are all under construction. The use of a stress control body with a stress cone at the cable end is one of the effective methods to solve the electric field concentration at the cable end. The prefabricated rubber terminal mainly uses silicone rubber and ethylene propylene rubber to make stress control bodies. In the case of AC, the el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G15/064C08L83/04C08L23/16C08K13/04C08K7/00C08K3/36C08K3/22C08K5/5419C08K5/14C08K3/04C08K3/06C08K5/33
Inventor 韩宝忠李忠华陈宇李长明
Owner HARBIN UNIV OF SCI & TECH
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