CN108484975A - The method that benzophenone derivates inhibit high voltage direct current cable space charge - Google Patents
The method that benzophenone derivates inhibit high voltage direct current cable space charge Download PDFInfo
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- CN108484975A CN108484975A CN201810164534.6A CN201810164534A CN108484975A CN 108484975 A CN108484975 A CN 108484975A CN 201810164534 A CN201810164534 A CN 201810164534A CN 108484975 A CN108484975 A CN 108484975A
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- Prior art keywords
- space charge
- direct current
- high voltage
- voltage direct
- current cable
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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
- C08K5/13—Phenols; Phenolates
- C08K5/132—Phenols containing keto groups, e.g. benzophenones
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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 present invention discloses a kind of method of benzophenone derivates inhibition high voltage direct current cable space charge, this method key step：It is 100 according to mass ratio：0.1：2：Low density polyethylene (LDPE), antioxidant, crosslinking agent and 4,4 ' dihydroxy benaophenonels are placed in mixer and obtain mixing mixture after 110 DEG C of temperature is sufficiently mixed by 0.5；Preheating is fully melted；Pressurization crosslinking；After maintaining pressure is constant to make crosslinked polyethylene sample cooled to room temperature, sample compacting is taken out；It is placed in vacuum tank dry.The present invention not only significantly inhibits the injection and accumulation of space charge in XLPE, also accelerates the dissipation of space charge in XLPE.
Description
Technical field
The invention belongs to the suppression technology fields more particularly to one of high-voltage direct-current cross-linked polyethylene cable insulating space charge
The method that kind benzophenone derivates inhibit high voltage direct current cable space charge.
Background technology
High voltage direct current cable plays irreplaceable role in current electric system, and crosslinked polyethylene is to apply at present
In the predominating insulation of high voltage direct current cable.High voltage direct current cable at runtime, crosslinked polyethylene insulation material under DC fields
Be readily injected into simultaneously influences the insulation characterisitics such as aging, shelf depreciation, breakdown with accumulation space charge, distortion electric field.According to electromagnetic field
Theory, 1 μ C/cm in plane plate specimen3Space charge the electric field of 50kV/mm is generated at 1mm.Space charge accumulation can influence electricity
Field distribution, and internal field is caused to distort.If space charge density is very high, local electric field strength will be more than dielectric breakdown strength
And initial shock is caused to be worn.Even if internal field less high space charge accumulation if can gradually make dielectric occur aging, cause
The formation of insulation defect, to reduce the long-term running reliability of high voltage direct current cable and service life.Therefore, research crosslinking is poly-
The suppressing method of space charge is of great significance in ethylene insulating materials.
In the research of recent decades, some scholars press down the space charge of cross-linking polyethylene materials using nanometer polymer
Method expansion research processed.However, how to ensure that evenly dispersed in cross-linking polyethylene materials of nano particle is a nothing always
The problem that method effectively solves.Reunion of the nano particle in cross-linking polyethylene materials can make nano particle itself become a kind of miscellaneous
Matter, the serious insulation characterisitic for destroying cross-linking polyethylene materials.The present invention is based on benzophenone derivates and cross-linking polyethylene materials
Good compatibility, propose using benzophenone derivates inhibit high-voltage direct-current cross-linked polyethylene cable insulating space charge.
It is demonstrated experimentally that this method can effectively inhibit the accumulation of space charge in crosslinked polyethylene insulation material.
Invention content
Present invention aims to overcome that technological deficiency existing in the prior art, proposes that a kind of benzophenone derivates inhibit
The method of high voltage direct current cable space charge.
The technical solution adopted by the present invention to solve the technical problems is：Benzophenone derivates inhibit high voltage direct current cable
The method of space charge, this method comprises the following steps：
1) it is 100 according to mass ratio：0.1：2：0.5 by low density polyethylene (LDPE), antioxidant, crosslinking agent and 4,4 '-dihydroxy
Benzophenone is placed in mixer obtains mixing mixture after 110 DEG C of temperature is sufficiently mixed；
2) mixing mixture in step 1) is placed in vulcanizing press, 120 DEG C preheat 10 minutes, keep mixture abundant
Melt；
3) vulcanizing press is forced into 30MPa, while temperature is increased to 180 DEG C, full cross-linked is that crosslinked polyethylene tries
Sample；
4) maintain pressure is constant make crosslinked polyethylene sample cooled to room temperature after, take out sample be pressed into the length of side 40 ×
40mm, 250 μm of thickness；
5) it is placed in vacuum tank, temperature is set as 80 DEG C, is dried in vacuo 48 hours, makes to generate in sample cross-linking process miscellaneous
Matter fully excludes.
The preferred antioxidant 1010 of antioxidant in the step 1).
The preferred cumyl peroxide of crosslinking agent in the step 1).
Banbury rotating speed 100r/min in the step 1).
Advantageous effect
Due to 4,4'-Dihydroxybenzophenone and the excellent compatibility of crosslinked polyethylene ontology, the poly- second of modified crosslinking
It is not occurred in alkene due to heterocharge caused by impurity, inhibits space charge using nano particle which overcome traditional
When, the problem of making nano particle itself and become a kind of impurity band to carry out space charge since nano particle dispersion is uneven；Together
When, 4,4'-Dihydroxybenzophenone can absorb the energy of the high energy electron of high-field electrode injection, and space charge is made to be not easy to inject
To inside crosslinked polyethylene, the energy of absorption by it is a kind of to crosslinked polyethylene it is harmless in a manner of discharge, further reduced crosslinking
The possibility that polyethylene insulation breaks down.From Figure 2 it can be seen that this method can significantly inhibit in XLPE the injection of space charge and
Accumulation；
Since the space charge energy being injected into sample is absorbed by 4,4'-Dihydroxybenzophenone, the lower electricity of energy
Lotus is crosslinked the shallower trap capture of energy level in polyethylene, so these charges are more readily pulled from trap in process of depolarization,
Space charge dissipates rapidly.As shown in figure 3, this method accelerates the dissipation of space charge in XLPE, this is to high voltage direct current cable
It is of great significance with XLPE.
Description of the drawings
Fig. 1 is 4,4 '-dihydroxy benaophenonel chemical formulas.
Fig. 2 is interfacial polarization Character Comparison：
(a) the interfacial polarization characteristic of the pure XLPE samples of control group；
(b) the interfacial polarization characteristic of the modified XLPE samples of the present invention.
Fig. 3 is that space charge depolarizes Character Comparison：
(a) space charge of the pure XLPE samples of control group depolarizes characteristic；
(b) space charge of the modified XLPE samples of the present invention depolarizes characteristic.
Specific implementation mode
Below by specific embodiments and the drawings, the present invention is further illustrated.The embodiment of the present invention is in order to more
So that those skilled in the art is more fully understood the present invention well, any limitation is not made to the present invention.
The method that benzophenone derivates of the present invention inhibit high voltage direct current cable space charge, includes the following steps：
1) dry LDPE, antioxidant 1010, cumyl peroxide (DCP) and 4,4 '-dihydroxy benaophenonels are pressed
According to 100：0.1：2：0.5 mass ratio, which is placed in mixer, to be sufficiently mixed 30 minutes, 110 DEG C of temperature, banbury rotating speed 100r/
Min obtains mixing mixture；
2) it weighs 1.5 grams of mixing mixtures to be placed in vulcanizing press, 120 DEG C preheat 10 minutes, keep mixture abundant
Melt；
3) vulcanizing press is forced into 30MPa, while temperature is increased to 180 DEG C, suppresses 30 minutes, LDPE is made fully to hand over
Connection is crosslinked polyethylene (XLPE)；
4) compression molding electromechanical source is closed, is taken out after maintaining pressure is constant to make sample cooled to room temperature, wherein film
Sample length of side 40mm × 40mm, 250 μm of thickness；
5) sample is placed on temperature to be set as in 80 DEG C of vacuum tank, is dried in vacuo 48 hours, makes sample cross-linking process
The impurity of middle generation fully excludes.
Contrast test：
Control group is set, in addition to being added in component in step 1) and not adding 4,4'-Dihydroxybenzophenone, control group experiment
Step is all same as above.
Detection process：
1, the interfacial polarization characteristic of research control group pure XLPE and the modified XLPE samples of the present invention：Using the side PEA
The space charge characteristic of method test sample at room temperature：It is measured 30 minutes under the conditions of -30kV/mm DC electric fields, obtains sample
The space charge injection of pressurization polarization process and accumulation characteristic, as shown in Fig. 2, the present invention significantly inhibits space charge in XLPE
Injection and accumulation；
2, the space charge of the pure XLPE of research control group and the modified XLPE samples of the present invention depolarizes characteristic：Disconnect electricity
Source, short circuit measurement 15 minutes obtain the space charge dissipation characteristic of sample short circuit process of depolarization, as shown in figure 3, the present invention adds
The dissipation of space charge in speed XLPE.
Claims (4)
1. the method that benzophenone derivates inhibit high voltage direct current cable space charge, which is characterized in that this method includes as follows
Step：
1) it is 100 according to mass ratio：0.1：2：0.5 by low density polyethylene (LDPE), antioxidant, crosslinking agent and 4,4 '-dihydroxy hexichol
Ketone is placed in mixer obtains mixing mixture after 110 DEG C of temperature is sufficiently mixed；
2) mixing mixture in step 1) is placed in vulcanizing press, 120 DEG C preheat 10 minutes, and mixture is made fully to melt
Change；
3) vulcanizing press is forced into 30MPa, while temperature is increased to 180 DEG C, full cross-linked is crosslinked polyethylene sample；
4) maintain pressure is constant make crosslinked polyethylene sample cooled to room temperature after, take out sample be pressed into length of side 40mm ×
40mm, 250 μm of thickness；
5) it is placed in vacuum tank, temperature is set as 80 DEG C, is dried in vacuo 48 hours, the impurity generated in sample cross-linking process is made to fill
Divide and excludes.
2. the method that benzophenone derivates according to claim 1 inhibit high voltage direct current cable space charge, feature
It is, the preferred antioxidant 1010 of antioxidant in the step 1).
3. the method that benzophenone derivates according to claim 1 inhibit high voltage direct current cable space charge, feature
It is, the preferred cumyl peroxide of crosslinking agent in the step 1).
4. the method that benzophenone derivates according to claim 1 inhibit high voltage direct current cable space charge, feature
It is, banbury rotating speed 100r/min in the step 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164534.6A CN108484975B (en) | 2018-02-27 | 2018-02-27 | Method for inhibiting space charge of high-voltage direct-current cable by benzophenone derivative |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164534.6A CN108484975B (en) | 2018-02-27 | 2018-02-27 | Method for inhibiting space charge of high-voltage direct-current cable by benzophenone derivative |
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| Publication Number | Publication Date |
|---|---|
| CN108484975A true CN108484975A (en) | 2018-09-04 |
| CN108484975B CN108484975B (en) | 2020-07-17 |
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| CN201810164534.6A Expired - Fee Related CN108484975B (en) | 2018-02-27 | 2018-02-27 | Method for inhibiting space charge of high-voltage direct-current cable by benzophenone derivative |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109384998A (en) * | 2018-10-29 | 2019-02-26 | 黑龙江省科学院技术物理研究所 | Crosslinked polyolefin insulating material of resistance to electric tree aging and preparation method thereof |
| CN109776910A (en) * | 2018-12-25 | 2019-05-21 | 天津大学 | A kind of preparation method for the crosslinked polyethylene insulation material inhibiting space charge |
| WO2023019632A1 (en) * | 2021-08-19 | 2023-02-23 | 南方电网科学研究院有限责任公司 | Maleic anhydride modified voltage stabilizer, and preparation method therefor and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001008166A1 (en) * | 1999-07-27 | 2001-02-01 | Pirelli Cavi E Sistemi S.P.A. | Cable, in particular for transport or distribution of electrical energy and insulating composition |
| CN102149758A (en) * | 2008-09-09 | 2011-08-10 | 博里利斯股份公司 | Polyolefin composition for medium/high/extra high voltage cables comprising benzophenone-type voltage stabilizer |
| CN103965543A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨理工大学 | Crosslinkable polyethylene insulation material for high-voltage direct-current cable |
-
2018
- 2018-02-27 CN CN201810164534.6A patent/CN108484975B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001008166A1 (en) * | 1999-07-27 | 2001-02-01 | Pirelli Cavi E Sistemi S.P.A. | Cable, in particular for transport or distribution of electrical energy and insulating composition |
| CN102149758A (en) * | 2008-09-09 | 2011-08-10 | 博里利斯股份公司 | Polyolefin composition for medium/high/extra high voltage cables comprising benzophenone-type voltage stabilizer |
| CN103965543A (en) * | 2014-05-21 | 2014-08-06 | 哈尔滨理工大学 | Crosslinkable polyethylene insulation material for high-voltage direct-current cable |
Non-Patent Citations (1)
| Title |
|---|
| 仲利东: ""有机电性能改性剂与聚乙烯复合材料的制备及性能研究"", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109384998A (en) * | 2018-10-29 | 2019-02-26 | 黑龙江省科学院技术物理研究所 | Crosslinked polyolefin insulating material of resistance to electric tree aging and preparation method thereof |
| CN109384998B (en) * | 2018-10-29 | 2021-05-25 | 中国医学科学院放射医学研究所 | Polyolefin insulating material resistant to electrical tree aging and preparation method thereof |
| CN109776910A (en) * | 2018-12-25 | 2019-05-21 | 天津大学 | A kind of preparation method for the crosslinked polyethylene insulation material inhibiting space charge |
| WO2023019632A1 (en) * | 2021-08-19 | 2023-02-23 | 南方电网科学研究院有限责任公司 | Maleic anhydride modified voltage stabilizer, and preparation method therefor and application thereof |
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| CN108484975B (en) | 2020-07-17 |
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Granted publication date: 20200717 |