A kind of high voltage direct current cable material and preparation method thereof

A high-voltage DC, cable material technology, used in circuits, electrical components, plastic/resin/wax insulators, etc., can solve problems such as injection accumulation, and achieve the effect of suppressing electrical tree branches, high breakdown strength, and excellent space charge accumulation characteristics

Active Publication Date: 2017-09-01
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-voltage direct current cable material and its preparation method to solve the problem of space charge injection and accumulation of existing plastic high-voltage direct current transmission

Method used

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  • A kind of high voltage direct current cable material and preparation method thereof
  • A kind of high voltage direct current cable material and preparation method thereof
  • A kind of high voltage direct current cable material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Cable material formula

[0031]

[0032] (2) The preparation process is

[0033] 1) Preparation of modified nano-magnesium oxide: mix magnesium oxide with a particle size of 30nm and coupling agent KH550 at a mass ratio of 20:3, mill on a roller mill for 1 hour, and set aside;

[0034] 2) Premixing: mix low-density polyethylene and liquid paraffin evenly in a high-speed mixer, raise the temperature of the material to 60°C, then add the modified nano-magnesia in step 1), keep the temperature of the material until it is evenly mixed, and finally add anti Oxygen 300 and dibenzoyl are mixed evenly again;

[0035] 3) Pelletizing: the mixed material is prepared in an extruder at a temperature of 200° C. at a discharge speed of 300 r / min to prepare a cable material.

Embodiment 2

[0037] (1) The formula of the cable material is as follows:

[0038]

[0039] (2) The preparation process is:

[0040] 1) Preparation of modified nano-magnesia: mix magnesium oxide with a particle size of 50nm and coupling agent KH580 at a mass ratio of 20:3, mill on a roller mill for 1.5h, and set aside;

[0041] 2) Premixing: mix low-density polyethylene and liquid paraffin evenly in a high-speed mixer, add the modified nano-magnesium oxide prepared in step 1) after the temperature of the material rises to 65°C, keep the temperature of the material until it is evenly mixed, and finally add anti Oxygen 300 and 2,2-methyl-benzoyl are mixed evenly again;

[0042] 3) Extrusion granulation: the mixed material is prepared in an extruder at a temperature of 220° C. at a discharge speed of 350 r / min to prepare a cable material.

Embodiment 3

[0044] (1) Cable material formula

[0045]

[0046] (2) Preparation process

[0047] 1) Preparation of modified nano-magnesium oxide: mix magnesium oxide with a particle size of 80nm and coupling agent KH560 at a mass ratio of 20:3, mill on a roller mill for 2 hours, and set aside;

[0048] 2) Premixing: mix low-density polyethylene and liquid paraffin evenly in a high-speed mixer, raise the temperature of the material to 70°C, then add the modified nano-magnesia prepared in step 1), keep the temperature of the material until it is evenly mixed, and finally add anti Oxygen 300 and 2,2-ethyl-benzoyl were mixed evenly again;

[0049] 3) Extrusion granulation: the mixed material is prepared in an extruder at a temperature of 250° C. at a discharge speed of 400 r / min to prepare a cable material.

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Abstract

The invention provides a high-voltage direct-current cable material and a preparation method thereof. The high-voltage direct-current cable material comprises the following components in parts by mass: 90-100 parts of low-density polyethylene, 0.5-3.5 parts of modified nanometer magnesia, 0.1-0.5 part of molten paraffin, 0.001-0.08 part of an antioxidant and 0.001-2.5 parts of a benzyl compound. The preparation method comprises the following steps: preparing the modified nanometer magnesia by using a drum ball-milling method, premixing the raw materials, and finally pelleting, thereby obtaining the high-voltage direct-current cable material. The high-voltage direct-current cable material provided by the scheme of the invention is excellent in space charge accumulation inhibition property under the condition of 40kV / mm and high in breakdown field strength, and the requirement of high-voltage direct-current cable power transmission of 100kV can be met.

Description

technical field [0001] The invention relates to a power cable material and a preparation method thereof, in particular to a high-voltage direct current cable material and a preparation method thereof. Background technique [0002] With the increasing shortage of power resources, the traditional AC transmission method tends to be replaced by the low-loss, low-cost plastic high-voltage DC transmission method due to its shortcomings such as high loss and high cost. The present inventor has conducted a lot of research on the current plastic high-voltage direct-current cables and found that some properties of high-voltage direct-current cable materials of 100 kV and above put into the market need to be improved. [0003] For example, there is a large amount of space charge injection and accumulation in the cable insulation layer during operation. In this case, electrical breakdown will occur to a certain extent, and eventually lead to transmission accidents. Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L91/06C08K9/10C08K3/22H01B3/44
CPCC08K2201/011C08L23/06C08L2203/202C08L2207/066H01B3/441C08L91/06C08K9/10C08K2003/222
Inventor 张翀于凡
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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