CN103965543B - A kind of high voltage direct current cable cross-linkable polyethylene insulation material - Google Patents
A kind of high voltage direct current cable cross-linkable polyethylene insulation material Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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- C08K5/00—Use of organic ingredients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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Abstract
A kind of high voltage direct current cable cross-linkable polyethylene insulation material, relates to a kind of cross-linkable polyethylene insulation material.The present invention is to solve that what existing common crosslinked polyethylene existed under DC electric field effect is easily generated space-charge accumulation and the technical problem of conductance property difference.A kind of high voltage direct current cable cross-linkable polyethylene insulation material of the present invention is made up of the nano-carbon material of the Low Density Polyethylene of 100 parts, the cross-linking agent of 1.5～2.2 parts, the antioxidant of 0.2～0.5 part and 0.5～1.2 part by weight.The crosslinked polyethylene utilizing the cross-linkable polyethylene insulation material of the present invention to prepare has conductance property and the suppression space charge ability of excellence, it is possible to be used for manufacturing high voltage direct current cable, import substitutes.The present invention is applied to the preparation field of cross-linkable polyethylene insulation material.
Description
Technical field
The present invention relates to a kind of cross-linkable polyethylene insulation material.
Background technology
High voltage direct current cable circuit have loss little, transmission capacity is big, transmission distance is unrestricted, operation stability is high, can
Coupling the advantages such as asynchronous electrical network, its application is increasingly subject to pay attention to.In the transmission of electricity over strait of some specific areas, such as distance, high
Straightening stream cable run is almost unique selection.Between 45 years of high voltage direct current cable application initial stage, main employing dipping paper is exhausted
Edge cable and oil-filled cable, its shortcoming is that manufacturing process is complicated, cost is high, difficult in maintenance.Crosslinked polyethylene (XLPE) in 1999
Insulating A High-Voltage direct current cables starts application, and its operating temperature is high, lightweight, cable and accessory structure simple, install and safeguard
The advantages such as convenience, oil-free disclosure risk are the most extensively admitted.Along with Technology of HVDC based Voltage Source Converter is increasingly mature, XLPE is exhausted
Edge high voltage direct current cable is except continuing to keep absolute advantages in addition in terms of coupling the continental Grid crossing over broad straits, also to different
The aspect expansive approach such as the step land interconnection of electrical network, big city power supply capacity increase, island load power transmission, renewable energy power generation conveying.
The XLPE Insulating A High-Voltage direct current cables length abroad put into operation at present is about 30000km, and highest voltage level reaches 320kV.
China will put into operation in the end of the year 2013 first bar XLPE Insulating A High-Voltage direct current cables circuit, separately have a direct current cables circuit building.
Having scholarly forecast, along with Urbanization in China quickening, Development of Islands strategy accelerates enforcement and renewable energy power generation is quickly sent out
Opening up, the epoch that XLPE Insulating A High-Voltage direct current cables consumption at home quickly increases may will soon arrive.
XLPE Insulating A High-Voltage direct current cables comes out and lags behind similar ac cable nearly 30 years, and insulant performance always restricts it
Application and one of principal element developed.Under DC electric field effect, common XLPE easily produces space-charge accumulation, and space
Electric charge may cause electric field Severe distortion.It addition, the Electric Field Distribution under its DC voltage is affected bigger by the conductance property of XLPE.
The manufacture difficulty that these factors result in high voltage direct current cable cross-linkable polyethylene insulation material is very big, the most only only a few
Transnational enterprise has grasped its key technology produced, and has monopolized its price and market, and domestic production this material required all relies on
Import.
Summary of the invention
The present invention is to solve that existing common crosslinked polyethylene exists under DC electric field effect be easily generated space-charge accumulation and
The technical problem of conductance property difference, thus provide a kind of high voltage direct current cable cross-linkable polyethylene insulation material.
A kind of high voltage direct current cable cross-linkable polyethylene insulation material of the present invention is gathered by the low-density of 100 parts by weight
The nano-carbon material of ethylene, the cross-linking agent of 1.5～2.2 parts, the antioxidant of 0.2～0.5 part and 0.5～1.2 part is made.
The present invention includes following beneficial effect:
The XLPE that the nano-carbon material utilizing the cross-linkable polyethylene insulation material of the present invention to prepare is filled is at below 20kV/mm
In electric field, electrical conductivity does not changes with electric field intensity, varies with temperature about 1 order of magnitude, and conductance property is excellent；Utilize this
The crosslinked polyethylene that the cross-linkable polyethylene insulation material of invention prepares also has suppression space charge ability；Utilize the present invention's
The cross-linking polyethylene materials that cross-linkable polyethylene insulation material prepares has conductance property and the suppression space charge ability of excellence,
Can be used in manufacturing high voltage direct current cable, import substitutes.
Accompanying drawing explanation
Fig. 1 is the XLPE distribution of space charge figure when 40kV/mm electric field action 30min；
Fig. 2 is distribution of space charge figure during short circuit 30min after the pre-direct current of XLPE；
Fig. 3 is that the nano-carbon material filling XLPE utilizing the cross-linkable polyethylene insulation material of test one preparation to prepare exists
Distribution of space charge figure during 40kV/mm electric field action 30min；
Fig. 4 is that the nano-carbon material utilizing the cross-linkable polyethylene insulation material of test one preparation to prepare fills the pre-direct current of XLPE
Distribution of space charge figure during rear short circuit 30min；
Fig. 5 is the conductance property curve chart of XLPE；Wherein, the conductance property curve chart of XLPE at ■ is 30 DEG C；▲ it is
The conductance property curve chart of XLPE at 70 DEG C；● it is the conductance property curve chart of XLPE at 90 DEG C；
Fig. 6 is the conductance that the nano-carbon material utilizing the cross-linkable polyethylene insulation material of test one preparation to prepare fills XLPE
Performance diagram；Wherein, at ■ is 30 DEG C, nano-carbon material fills the conductance property curve chart of XLPE；▲ it is to receive at 70 DEG C
Rice material with carbon element fills the conductance property curve chart of XLPE；● it is the conductance property song that at 90 DEG C, nano-carbon material fills XLPE
Line chart.
Detailed description of the invention
Detailed description of the invention one: a kind of high voltage direct current cable cross-linkable polyethylene insulation material of present embodiment is by weight
Number is by the Low Density Polyethylene of 100 parts, the cross-linking agent of 1.5～2.2 parts, the antioxidant of 0.2～0.5 part and the nanometer of 0.5～1.2 part
Material with carbon element is made.
Present embodiment includes following beneficial effect:
The XLPE that the nano-carbon material utilizing the cross-linkable polyethylene insulation material of present embodiment to prepare is filled is at 20kV/mm
In following electric field, electrical conductivity does not changes with electric field intensity, varies with temperature about 1 order of magnitude, and conductance property is excellent；Profit
The crosslinked polyethylene prepared with the cross-linkable polyethylene insulation material of present embodiment also has suppression space charge ability；Utilize
The cross-linking polyethylene materials that the cross-linkable polyethylene insulation material of present embodiment prepares has conductance property and the suppression sky of excellence
Between charge capability, it is possible to be used for manufacturing high voltage direct current cable, import substitutes.
Detailed description of the invention two: present embodiment is unlike detailed description of the invention one: described high voltage direct current cable is used can
Crosslinked polyethylene insulation material is by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 1.5 parts, the antioxidant of 0.2 part
Nano-carbon material with 0.5 part is made.Other is identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is unlike detailed description of the invention one or two: described high voltage direct current cable
With cross-linkable polyethylene insulation material by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 1.8 parts, 0.3 part anti-
The nano-carbon material of oxygen agent and 0.6 part is made.Other is identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is unlike one of detailed description of the invention one to three: described HVDC
Cable with cross-linkable polyethylene insulation material by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 2.0 parts, 0.4 part
Antioxidant and the nano-carbon material of 0.8 part make.Other is identical with one of detailed description of the invention one to three.
Detailed description of the invention five: present embodiment is unlike one of detailed description of the invention one to four: described HVDC
Cable with cross-linkable polyethylene insulation material by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 2.0 parts, 0.5 part
Antioxidant and the nano-carbon material of 1.0 parts make.Other is identical with one of detailed description of the invention one to four.
Detailed description of the invention six: present embodiment is unlike detailed description of the invention one to five: described high voltage direct current cable
With cross-linkable polyethylene insulation material by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 2.2 parts, 0.5 part anti-
The nano-carbon material of oxygen agent and 1.2 parts is made.Other is identical with detailed description of the invention one.
Detailed description of the invention seven: present embodiment is unlike one of detailed description of the invention one to six: described low-density is gathered
The melt flow rate (MFR) of ethylene is 1.0～2.2.Other is identical with one of detailed description of the invention one to six.
Detailed description of the invention eight: present embodiment is unlike one of detailed description of the invention one to seven: described cross-linking agent is
Cumyl peroxide.Other is identical with one of detailed description of the invention one to seven.
Detailed description of the invention nine: present embodiment is unlike one of detailed description of the invention one to eight: described antioxidant is
4,4'-thiobis (the 6-tert-butyl group-3-methylphenol) or sulfur are double [3-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester] for diethylene.Its
It is identical with one of detailed description of the invention one to eight.
Detailed description of the invention ten: present embodiment is unlike one of detailed description of the invention one to nine: described nano carbon material
Material is the mixture of one or more in white carbon black, nano-graphite, Graphene and CNT.Other and detailed description of the invention
One of one to nine identical.
By tests below checking beneficial effects of the present invention:
Test one: the preparation method of a kind of high voltage direct current cable cross-linkable polyethylene insulation material of this test is by following step
Rapid realization:
One, the Low Density Polyethylene that melt flow rate (MFR) is 1.5 of 100 parts, the cross-linking agent peroxide of 2.0 parts are weighed according to weight portion
Change diisopropylbenzene (DIPB), the antioxidant of 0.5 part and the nano-carbon material of 1.0 parts；
Two, the Low Density Polyethylene, antioxidant and the nano-carbon material that step one are weighed are added simultaneously in mixing roll, in temperature
Degree be at 130～200 DEG C mixing uniformly, obtain material；
Three, material enters in Melt Pump, and Melt Pump makes material flow through double hydraulic screen replacing filter to filter, after filtration
Material enter single screw pelletizer pelletize, gained pellet is centrifuged in pure water is cooled and transferred to centrifugal dehydrator
Dehydration and dried, be then preheating to 60～90 DEG C, enter back into rotary drum blender mixer and be incubated at 60～90 DEG C, the friendship that will weigh
Connection agent sprays the surface of pellet, is rotated further to pellet surface and is dried, it is thus achieved that is mixed with the pellet of cross-linking agent；
Four, be mixed with cross-linking agent pellet enter absorption bin, homogenization 3～20h under conditions of temperature is 60～90 DEG C, then
It is cooled to 30～50 DEG C, i.e. obtains high high voltage direct current cable cross-linkable polyethylene insulation material.
The XLPE distribution of space charge figure when 40kV/mm electric field action 30min is as shown in Figure 1；After the pre-direct current of XLPE
Distribution of space charge figure during short circuit 30min is as shown in Figure 2；Utilize cross-linkable polyethylene insulation material system prepared by this test
The nano-carbon material obtained fills the XLPE distribution of space charge figure when 40kV/mm electric field action 30min as shown in Figure 3；
The nano-carbon material that the cross-linkable polyethylene insulation material utilizing this test to prepare prepares fills short circuit after the pre-direct current of XLPE
Distribution of space charge figure during 30min is as shown in Figure 4；Can be obtained by Fig. 1 and Fig. 2, Fig. 3 and Fig. 4 contrast, utilize this test
The nano-carbon material that the cross-linkable polyethylene insulation material of preparation prepares has the suppression space charge ability of excellence.
The conductance property curve chart of XLPE is as shown in Figure 5；Wherein, the conductance property curve chart of XLPE at ■ is 30 DEG C；▲
It it is the conductance property curve chart of XLPE at 70 DEG C；● it is the conductance property curve chart of XLPE at 90 DEG C；Can from Fig. 5
Going out, the electrical conductivity of XLPE changes the most more apparent with temperature and electric field intensity, the largest of about 3 orders of magnitude.This test is utilized to make
The nano-carbon material that standby cross-linkable polyethylene insulation material prepares fills the conductance property curve chart of XLPE as shown in Figure 6；
Wherein, at ■ is 30 DEG C, nano-carbon material fills out the conductance property curve chart of XLPE；▲ it is that at 70 DEG C, nano-carbon material fills out XLPE
Conductance property curve chart；● it is the conductance property curve chart that at 90 DEG C, nano-carbon material fills out XLPE；From fig. 6, it can be seen that
The XLPE that the nano-carbon material that the cross-linkable polyethylene insulation material utilizing this test to prepare prepares is filled is at below 20kV/mm
In electric field, electrical conductivity does not changes with electric field intensity, varies with temperature about 1 order of magnitude.Illustrate that prepared by this test hands over
The conductance property of the nano-carbon material that bivinyl insulant prepares is excellent.
Claims (1)
1. a high voltage direct current cable cross-linkable polyethylene insulation material, it is characterised in that described high voltage direct current cable is used can
Crosslinked polyethylene insulation material is by weight by the Low Density Polyethylene of 100 parts, the cross-linking agent of 2.0 parts, the antioxygen of 0.5 part
The nano-carbon material of agent and 1.0 parts is made；
The preparation method of high voltage direct current cable cross-linkable polyethylene insulation material is to realize according to the following steps:
One, the Low Density Polyethylene that melt flow rate (MFR) is 1.5 of 100 parts, the cross-linking agent peroxide of 2.0 parts are weighed according to weight portion
Change diisopropylbenzene (DIPB), the antioxidant of 0.5 part and the nano-carbon material of 1.0 parts；
Two, the Low Density Polyethylene, antioxidant and the nano-carbon material that step one are weighed are added simultaneously in mixing roll, in temperature
Degree be at 130～200 DEG C mixing uniformly, obtain material；
Three, material enters in Melt Pump, and Melt Pump makes material flow through double hydraulic screen replacing filter to filter, after filtration
Material enter single screw pelletizer pelletize, gained pellet is centrifuged in pure water is cooled and transferred to centrifugal dehydrator
Dehydration and dried, be then preheating to 60～90 DEG C, enter back into rotary drum blender mixer and be incubated at 60～90 DEG C, the friendship that will weigh
Connection agent sprays the surface of pellet, is rotated further to pellet surface and is dried, it is thus achieved that is mixed with the pellet of cross-linking agent；
Four, be mixed with cross-linking agent pellet enter absorption bin, homogenization 3～20h under conditions of temperature is 60～90 DEG C, then
It is cooled to 30～50 DEG C, i.e. obtains high voltage direct current cable cross-linkable polyethylene insulation material.
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| CN201410216314.5A CN103965543B (en) | 2014-05-21 | 2014-05-21 | A kind of high voltage direct current cable cross-linkable polyethylene insulation material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105295190A (en) * | 2015-12-14 | 2016-02-03 | 常州中超石墨烯电力科技有限公司 | Functionalized high polymer composite material with carbon black and graphene as conductive mediums |
| CN105405491B (en) * | 2015-12-18 | 2017-04-19 | 国网辽宁省电力有限公司沈阳供电公司 | Capacity-increasable aerial insulated cable |
| CN105837889A (en) * | 2016-03-17 | 2016-08-10 | 哈尔滨理工大学 | Polymeric nanometer insulating dielectric composite and preparation method thereof |
| CN106531316A (en) * | 2016-10-17 | 2017-03-22 | 安徽省绿环电气股份有限公司 | Crosslinked polyethylene power cable with electrical tree aging preventive function |
| CN106633303B (en) * | 2016-12-21 | 2019-10-11 | 西安交通大学 | The nano combined crosslinked polyethylene insulation material and preparation method thereof of high dc breakdown field strength |
| CN106867077A (en) * | 2017-02-24 | 2017-06-20 | 哈尔滨理工大学 | A kind of crosslinked polyethylene insulation material and preparation method thereof |
| CN107099092A (en) * | 2017-04-07 | 2017-08-29 | 安徽省无为县经纬电缆附件有限公司 | A kind of power-frequency electromagnetic fields |
| CN108562831B (en) * | 2017-12-15 | 2021-07-16 | 全球能源互联网欧洲研究院 | Method for manufacturing insulating material |
| CN108395601A (en) * | 2018-02-27 | 2018-08-14 | 天津大学 | The method that benzil derivatives inhibit high voltage direct current cable space charge |
| CN108484975B (en) * | 2018-02-27 | 2020-07-17 | 天津大学 | Method for inhibiting space charge of high-voltage direct-current cable by benzophenone derivative |
| CN108794861A (en) * | 2018-07-05 | 2018-11-13 | 天津大学 | Inhibit crosslinked polyetylene insulated electrical tree aging process method based on benzophenone derivates |
| CN109096577A (en) * | 2018-07-05 | 2018-12-28 | 天津大学 | Inhibit the method for crosslinked polyetylene insulated electrical tree aging process based on benzil derivatives |
| CN109206711A (en) * | 2018-08-27 | 2019-01-15 | 芜湖市元奎新材料科技有限公司 | A kind of high voltage direct current cable cross-linkable polyethylene insulation material and preparation method thereof |
| CN109593271B (en) * | 2018-11-29 | 2021-07-06 | 天津大学 | Method for improving breakdown field strength of polypropylene film based on benzil |
| CN110372942B (en) * | 2019-07-25 | 2021-09-03 | 江苏瑞文新材料科技有限公司 | Graphene modified direct-current high-voltage-resistant insulated cable material |
| CN111499956B (en) * | 2020-06-03 | 2022-01-18 | 四川大学 | Composite material resisting water tree aging, preparation method, application and performance test method thereof |
| CN113801385A (en) * | 2020-06-11 | 2021-12-17 | 全球能源互联网研究院有限公司 | Crosslinkable polyethylene insulating material for high-voltage cable and preparation method thereof |
| CN114137281B (en) * | 2021-11-25 | 2023-04-07 | 北京交通大学 | Space charge evaluation method based on conductive current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7255134B2 (en) * | 2002-07-23 | 2007-08-14 | Lubrizol Advanced Materials, Inc. | Carbon black-containing crosslinked polyethylene pipe having resistance to chlorine and hypochlorous acid |
| CN101083854A (en) * | 2006-05-30 | 2007-12-05 | 上海中大科技发展有限公司 | Nana intelligent temperature control cable material and process for producing |
| CN101440180B (en) * | 2008-12-26 | 2011-04-20 | 哈尔滨理工大学 | Polyolefin based non-linear dielectric material with non-linear dielectric constant and non-linear conductivity |
| CN102342869A (en) * | 2010-07-30 | 2012-02-08 | 谢志军 | Positive temperature coefficient (PTC) self-temperature-control hand warmer and manufacturing method thereof |
| CN102532669A (en) * | 2012-01-12 | 2012-07-04 | 上海交通大学 | High polymer-based graphene composite material with positive resistance temperature coefficient and preparation method |
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