CN103965543A - Crosslinkable polyethylene insulation material for high-voltage direct-current cable - Google Patents
Crosslinkable polyethylene insulation material for high-voltage direct-current cable Download PDFInfo
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- CN103965543A CN103965543A CN201410216314.5A CN201410216314A CN103965543A CN 103965543 A CN103965543 A CN 103965543A CN 201410216314 A CN201410216314 A CN 201410216314A CN 103965543 A CN103965543 A CN 103965543A
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- C—CHEMISTRY; METALLURGY
- 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
- C08K13/02—Organic and inorganic ingredients
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- C—CHEMISTRY; METALLURGY
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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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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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Abstract
The invention discloses a crosslinkable polyethylene insulation material for a high-voltage direct-current cable, relating to a crosslinkable polyethylene insulation material. The crosslinkable polyethylene insulation material is used for solving the technical problems that existing common crosslinked polyethylene is easy to generate space charge accumulation and has poor electrical conductivity characteristics under the effect of a direct-current electric field. The crosslinkable polyethylene insulation material for the high-voltage direct-current cable is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 1.5-2.2 parts of crosslinking agent, 0.2-0.5 part of antioxidant and 0.5-1.2 parts of nano-carbon material. Crosslinked polyethylene prepared by using the crosslinkable polyethylene insulation material has excellent electrical conductivity characteristics and space charge inhibiting capacities, and can be used for manufacturing the high-voltage direct-current cable to replace imported products. The crosslinkable polyethylene insulation material for the high-voltage direct-current cable, disclosed by the invention, can be applied to the field of preparation of the crosslinkable 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 has that loss is little, transmission capacity is large, transmission distance is unrestricted, operation stability is high, can connect the advantages such as asynchronous electrical network, and its application comes into one's own day by day.At some specific areas, for example long distance transmission of electricity over strait, high voltage direct current cable circuit is almost unique selection.Between 45 years of high voltage direct current cable application initial stage, mainly adopt mass impregnated paper insulation cable and oil filled switch, its shortcoming is that manufacturing process complexity, cost are high, difficult in maintenance.Within 1999, crosslinked polyethylene (XLPE) insulation high voltage direct current cable starts application, and its working temperature is high, lightweight, cable and accessory structure is simple, installation and maintenance is convenient, extensively admitted soon very much without advantages such as oily disclosure risks.Along with Technology of HVDC based Voltage Source Converter is increasingly mature, XLPE insulation high voltage direct current cable keeps absolute predominance except continuing aspect connecting the continent electrical network of crossing over broad straits, is also expanding application to aspects such as land interconnected, the big city power supply capacity increase of asynchronous electrical network, island load power transmission, renewable energy power generation conveyings.The XLPE insulation high voltage direct current cable length abroad putting into operation is at present about 30000km, and highest voltage level reaches 320kV.China's first XLPE insulation high voltage direct current cable circuit that put into operation in the end of the year 2013, separately has a direct current cables circuit building.Have scholarly forecast, along with Urbanization in China is accelerated, Development of Islands strategy is accelerated to implement and renewable energy power generation fast development, the XLPE insulation high voltage direct current cable epoch that consumption increases fast at home may will soon arrive.
XLPE insulation high voltage direct current cable comes out and lags behind similar ac cable nearly 30 years, and insulating material performance is one of principal element of its application of restriction and development always.Under DC electric field effect, common XLPE easily produces space charge accumulation, and space charge may cause electric field seriously to distort.In addition, the conductance property of XLPE is larger on the electric field distribution impact under its volts DS.These factors have caused the manufacture difficulty of high voltage direct current cable cross-linkable polyethylene insulation material very big, only have at present only a few multinational enterprise to grasp the gordian technique of its production, have monopolized its price and market, the whole dependence on import of required this material of domestic production.
Summary of the invention
The present invention will solve easy generation space charge accumulation and the poor technical problem of conductance property that existing common crosslinked polyethylene exists under DC electric field effect, thereby a kind of high voltage direct current cable cross-linkable polyethylene insulation material is provided.
A kind of high voltage direct current cable of the present invention is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.5～2.2 parts, the oxidation inhibitor of 0.2～0.5 part and the nano-carbon material of 0.5～1.2 part by weight with cross-linkable polyethylene insulation material.
The present invention includes following beneficial effect:
Utilize XLPE that nano-carbon material that cross-linkable polyethylene insulation material of the present invention makes fills below 20kV/mm in electric field specific conductivity substantially do not change with strength of electric field, vary with temperature approximately 1 order of magnitude, conductance property excellence; Utilize the crosslinked polyethylene that cross-linkable polyethylene insulation material of the present invention makes also to there is the space charge of inhibition ability; The cross-linking polyethylene materials that utilizes cross-linkable polyethylene insulation material of the present invention to make has excellent conductance property and suppresses space charge ability, can be used in manufacture high voltage direct current cable, import substitutes.
Brief description of the drawings
Fig. 1 is the distribution of space charge figure of XLPE in the time of 40kV/mm electric field action 30min;
Fig. 2 is distribution of space charge figure when short circuit 30min after the pre-direct current of XLPE;
Fig. 3 is that the nano-carbon material that utilizes the cross-linkable polyethylene insulation material of test one preparation to make is filled the distribution of space charge figure of XLPE in the time of 40kV/mm electric field action 30min;
Fig. 4 is the distribution of space charge figure while utilizing the nano-carbon material that makes of cross-linkable polyethylene insulation material of test one preparation to fill short circuit 30min after the pre-direct current of XLPE;
Fig. 5 is the conductance property graphic representation of XLPE; Wherein, ■ is the conductance property graphic representation of XLPE at 30 DEG C; ▲ be the conductance property graphic representation of XLPE at 70 DEG C; ● be the conductance property graphic representation of XLPE at 90 DEG C;
Fig. 6 utilizes the nano-carbon material that makes of cross-linkable polyethylene insulation material of test one preparation to fill the conductance property graphic representation of XLPE; Wherein, ■ is the conductance property graphic representation that at 30 DEG C, nano-carbon material is filled XLPE; ▲ be the conductance property graphic representation that at 70 DEG C, nano-carbon material is filled XLPE; ● be the conductance property graphic representation that at 90 DEG C, nano-carbon material is filled XLPE.
Embodiment
Embodiment one: a kind of high voltage direct current cable of present embodiment is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.5～2.2 parts, the oxidation inhibitor of 0.2～0.5 part and the nano-carbon material of 0.5～1.2 part by weight with cross-linkable polyethylene insulation material.
Present embodiment comprises following beneficial effect:
Utilize XLPE that nano-carbon material that the cross-linkable polyethylene insulation material of present embodiment makes fills below 20kV/mm in electric field specific conductivity substantially do not change with strength of electric field, vary with temperature approximately 1 order of magnitude, conductance property excellence; Utilize the crosslinked polyethylene that the cross-linkable polyethylene insulation material of present embodiment makes also to there is the space charge of inhibition ability; The cross-linking polyethylene materials that utilizes the cross-linkable polyethylene insulation material of present embodiment to make has excellent conductance property and suppresses space charge ability, can be used in manufacture high voltage direct current cable, import substitutes.
Embodiment two: present embodiment is different from embodiment one: described high voltage direct current cable is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.5 parts, the oxidation inhibitor of 0.2 part and the nano-carbon material of 0.5 part by weight with cross-linkable polyethylene insulation material.Other is identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two: described high voltage direct current cable is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.8 parts, the oxidation inhibitor of 0.3 part and the nano-carbon material of 0.6 part by weight with cross-linkable polyethylene insulation material.Other is identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three: described high voltage direct current cable is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.0 parts, the oxidation inhibitor of 0.4 part and the nano-carbon material of 0.8 part by weight with cross-linkable polyethylene insulation material.Other is identical with one of embodiment one to three.
Embodiment five: present embodiment is different from one of embodiment one to four: described high voltage direct current cable is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.0 parts, the oxidation inhibitor of 0.5 part and the nano-carbon material of 1.0 parts by weight with cross-linkable polyethylene insulation material.Other is identical with one of embodiment one to four.
Embodiment six: present embodiment is different from embodiment one to five: described high voltage direct current cable is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.2 parts, the oxidation inhibitor of 0.5 part and the nano-carbon material of 1.2 parts by weight with cross-linkable polyethylene insulation material.Other is identical with embodiment one.
Embodiment seven: present embodiment is different from one of embodiment one to six: the melt flow rate (MFR) of described Low Density Polyethylene is 1.0～2.2.Other is identical with one of embodiment one to six.
Embodiment eight: present embodiment is different from one of embodiment one to seven: described linking agent is dicumyl peroxide.Other is identical with one of embodiment one to seven.
Embodiment nine: present embodiment is different from one of embodiment one to eight: described oxidation inhibitor is 4,4'-thiobis (the 6-tertiary butyl-3-methylphenol) or sulfo-diethylene two [3-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester].Other is identical with one of embodiment one to eight.
Embodiment ten: present embodiment is different from one of embodiment one to nine: described nano-carbon material is one or more the mixture in carbon black, nano-graphite, Graphene and carbon nanotube.Other is identical with one of embodiment one to nine.
By following verification experimental verification beneficial effect of the present invention:
Test one: a kind of high voltage direct current cable of this test is realized according to the following steps by the preparation method of cross-linkable polyethylene insulation material:
One, take according to weight part Low Density Polyethylene, the linking agent dicumyl peroxide of 2.0 parts, the oxidation inhibitor of 0.5 part and the nano-carbon material of 1.0 parts that the melt flow rate (MFR) of 100 parts is 1.5;
Two, Low Density Polyethylene, oxidation inhibitor and nano-carbon material step 1 being taken joins in mixing roll simultaneously, is mixing even at 130～200 DEG C in temperature, obtains material;
Three, material enters in Melt Pump, Melt Pump makes streams cross double hydraulic screen replacing strainer to filter, material after filtration enters single screw pelletizer granulation, gained pellet is cooling and be transported to and in centrifuge, carry out centrifuge dehydration and drying treatment through pure water, then be preheating to 60～90 DEG C, then enter rotary drum blender mixer and be incubated at 60～90 DEG C, the linking agent taking is sprayed to the surface of pellet, be rotated further to pellet surface drying, obtain the pellet that is mixed with linking agent;
Four, the pellet that is mixed with linking agent enters absorption bin, is homogenizing 3～20h under the condition of 60～90 DEG C in temperature, is then cooled to 30～50 DEG C, obtains high high voltage direct current cable cross-linkable polyethylene insulation material.
The distribution of space charge figure of XLPE in the time of 40kV/mm electric field action 30min as shown in Figure 1; Distribution of space charge figure after the pre-direct current of XLPE when short circuit 30min as shown in Figure 2; The nano-carbon material that utilizes the cross-linkable polyethylene insulation material of this test preparation to make is filled the distribution of space charge figure of XLPE in the time of 40kV/mm electric field action 30min as shown in Figure 3; Distribution of space charge figure while utilizing nano-carbon material that the cross-linkable polyethylene insulation material of this test preparation makes to fill short circuit 30min after the pre-direct current of XLPE as shown in Figure 4; By Fig. 1 and Fig. 2, Fig. 3 and Fig. 4 contrast can obtain, and the nano-carbon material that utilizes the cross-linkable polyethylene insulation material of this test preparation to make has excellent inhibition space charge ability.
The conductance property graphic representation of XLPE as shown in Figure 5; Wherein, ■ is the conductance property graphic representation of XLPE at 30 DEG C; ▲ be the conductance property graphic representation of XLPE at 70 DEG C; ● be the conductance property graphic representation of XLPE at 90 DEG C; As can be seen from Figure 5, the specific conductivity of XLPE changes all more obvious with temperature and strength of electric field, the most about 3 orders of magnitude.The conductance property graphic representation of the nano-carbon material filling XLPE that the cross-linkable polyethylene insulation material that utilizes this test to prepare makes as shown in Figure 6; Wherein, ■ is the conductance property graphic representation that at 30 DEG C, nano-carbon material is filled out XLPE; ▲ be the conductance property graphic representation that at 70 DEG C, nano-carbon material is filled out XLPE; ● be the conductance property graphic representation that at 90 DEG C, nano-carbon material is filled out XLPE; As can be seen from Figure 6, utilize XLPE that nano-carbon material that the cross-linkable polyethylene insulation material of this test preparation makes fills below 20kV/mm in electric field specific conductivity substantially do not change with strength of electric field, vary with temperature approximately 1 order of magnitude.The conductance property excellence of the nano-carbon material that the crosslinkable ethene insulating material of this test preparation makes is described.
Claims (10)
1. a high voltage direct current cable cross-linkable polyethylene insulation material, is characterized in that a kind of high voltage direct current cable cross-linkable polyethylene insulation material is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.5～2.2 parts, the oxidation inhibitor of 0.2～0.5 part and the nano-carbon material of 0.5～1.2 part by weight.
2. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, the high voltage direct current cable cross-linkable polyethylene insulation material described in it is characterized in that is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.5 parts, the oxidation inhibitor of 0.2 part and the nano-carbon material of 0.5 part by weight.
3. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, the high voltage direct current cable cross-linkable polyethylene insulation material described in it is characterized in that is made up of the Low Density Polyethylene of 100 parts, the linking agent of 1.8 parts, the oxidation inhibitor of 0.3 part and the nano-carbon material of 0.6 part by weight.
4. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, the high voltage direct current cable cross-linkable polyethylene insulation material described in it is characterized in that is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.0 parts, the oxidation inhibitor of 0.4 part and the nano-carbon material of 0.8 part by weight.
5. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, the high voltage direct current cable cross-linkable polyethylene insulation material described in it is characterized in that is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.0 parts, the oxidation inhibitor of 0.5 part and the nano-carbon material of 1.0 parts by weight.
6. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, the high voltage direct current cable cross-linkable polyethylene insulation material described in it is characterized in that is made up of the Low Density Polyethylene of 100 parts, the linking agent of 2.2 parts, the oxidation inhibitor of 0.5 part and the nano-carbon material of 1.2 parts by weight.
7. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, is characterized in that the melt flow rate (MFR) of described Low Density Polyethylene is 1.0～2.2.
8. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, is characterized in that described linking agent is dicumyl peroxide.
9. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, it is characterized in that described oxidation inhibitor is 4,4'-thiobis (the 6-tertiary butyl-3-methylphenol) or sulfo-diethylene two [3-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester].
10. a kind of high voltage direct current cable cross-linkable polyethylene insulation material according to claim 1, is characterized in that described nano-carbon material is one or more the mixture in carbon black, nano-graphite, Graphene and carbon nanotube.
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Cited By (18)
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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 |
| CN105405491A (en) * | 2015-12-18 | 2016-03-16 | 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 |
| CN106633303A (en) * | 2016-12-21 | 2017-05-10 | 西安交通大学 | Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material |
| 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 |
| 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 |
| CN108484975A (en) * | 2018-02-27 | 2018-09-04 | 天津大学 | The method that benzophenone derivates inhibit high voltage direct current cable space charge |
| CN108562831A (en) * | 2017-12-15 | 2018-09-21 | 全球能源互联网欧洲研究院 | A kind of detection method and manufacturing method of insulating materials |
| 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 |
| CN109593271A (en) * | 2018-11-29 | 2019-04-09 | 天津大学 | A method of polypropylene film disruptive field intensity is improved based on benzil |
| CN110372942A (en) * | 2019-07-25 | 2019-10-25 | 江苏瑞文新材料科技有限公司 | A kind of direct current high pressure resistant insulation CABLE MATERIALS that graphene is modified |
| CN111499956A (en) * | 2020-06-03 | 2020-08-07 | 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 |
| CN114137281A (en) * | 2021-11-25 | 2022-03-04 | 北京交通大学 | Space charge evaluation method based on conductive current |
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| CN105405491A (en) * | 2015-12-18 | 2016-03-16 | 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 |
| CN106633303A (en) * | 2016-12-21 | 2017-05-10 | 西安交通大学 | Nano composite crosslinked polyethylene insulating material with high direct current breakdown field strength and preparation method of nano composite crosslinked polyethylene insulating material |
| 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 |
| CN108562831A (en) * | 2017-12-15 | 2018-09-21 | 全球能源互联网欧洲研究院 | A kind of detection method and manufacturing method of insulating materials |
| 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 |
| CN108484975A (en) * | 2018-02-27 | 2018-09-04 | 天津大学 | The method that benzophenone derivates inhibit high voltage direct current cable space charge |
| 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 |
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| 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 |
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