CN106750853A - A kind of photovoltaic generation direct current cables insulating materials and preparation method thereof - Google Patents
A kind of photovoltaic generation direct current cables insulating materials and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
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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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- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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Abstract
The present invention provides a kind of photovoltaic generation direct current cables insulating materials and preparation method thereof, is related to insulating materials technical field, including the raw material of components by weight percent once：LLDPE, 100 parts；Ethylene vinyl acetate copolymer, 10~30 parts；Modified by maleic acid anhydride graft polyethylene, 5~10 parts；Inorganic nano alundum (Al2O3), 1~5 part；Antioxidant 1010,0.1~2 part；Silane Grafted agent, 1~5 part；DCP initiators, 0.05 0.1 parts；Flow ability modifying agent, 0.1~0.5 part；The present invention can effectively suppress the movement of insulating inner cation, and then reduce gathering for space charge, improve insulating inner electric field, improve the specific insulation of insulating materials, and preparation technology is convenient, can more meet the requirement of photovoltaic generating system direct current cables insulation.
Description
Technical field
The present invention relates to insulating materials technical field, and in particular to a kind of photovoltaic generation with direct current cables insulating materials and its
Preparation method.
Background technology
As developing rapidly for photovoltaic industry, the use of photovoltaic generation direct current cables are also increasingly wider, dc main is
Photovoltaic component system conflux through header box after to inverter transmission line.Earth-free scheme being used dc main system, such as more
There is earth fault in fruit cable, it will to the harm that whole system even equipment belt is much bigger to compare exchange.
High pressure and super high voltage direct current electricity transmission being used in current China direct current cables technically, the direct current of photovoltaic power station system more
Cable is just in the starting stage, not enough to the understanding of direct current cables plus person skilled, mostly using general low pressure
Alternating electromotive force replaces, and this has resulted in the problems produced in actually used process.
Cross-linked polyethylene insulated cable is widely used in ac cable, with very excellent dielectric behavior and thing
Rationality energy, cost performance is higher, but used as direct current cables, also one defect is exactly problems with space charge, and this point is in HVDC
Attention in cable.When there is substantial amounts of local defect in insulating barrier, the space charge in insulation can be caused to gather.In exchange
The migration of material positive and negative charge cannot keep up with the quick change of power frequency electric field in electric field, thus will not produce space charge effect；
And in DC electric field, electric field presses resistivity size distribution, space charge will be formed and Electric Field Distribution is influenceed.It is crosslinked polyetylene insulated
It is overall cross-linked structure, belongs to non-polar polymer, but inherently one larger capacitor of cable, after direct current transportation stops
Equivalent to by a capacitor charging complete, substantial amounts of direct current energy is still present and in cable, be exactly so-called space
Electric charge, and these space charges will not be consumed as alternating electromotive force with dielectric loss, but can be in the defect of cable
Place concentrates, and accelerates the aging of insulation, so as to influence the service life of cable.
The content of the invention
The invention provides a kind of photovoltaic generation direct current cables insulating materials and preparation method thereof, can effectively suppress
The movement of insulating inner cation, and then gathering for space charge is reduced, improve insulating inner electric field, so as to prepare a kind of suitable
For the insulating materials of photovoltaic generating system direct current cables.
A kind of photovoltaic generation direct current cables insulating materials, including the raw material of components by weight percent once：Linear low density polyethylene
Alkene, 100 parts；Ethylene-vinyl acetate copolymer, 10~30 parts；Modified by maleic acid anhydride graft polyethylene, 5~10 parts；It is inorganic to receive
Rice alundum (Al2O3), 1~5 part；Antioxidant 1010,0.1~2 part；Silane Grafted agent, 1~5 part；DCP initiators, 0.05-0.1
Part；Flow ability modifying agent, 0.1~0.5 part.
Further, described silane section grafting agent is A171, vinyltrimethoxy silane.
Further, described flow ability modifying agent is the mixture of PE waxes and pitch.
Further, the PE waxes and pitch mixed proportion are 1:0.01~1:0.2.
Further, LLDPE, 100 parts；Ethylene-vinyl acetate copolymer, 20 parts；Maleic anhydride connects
Branch modified poly ethylene, 7 parts；Inorganic nano alundum (Al2O3), 2 parts；Antioxidant 1010,0.8 part；Silane Grafted agent, 2.5 parts；DCP
Initiator, 0.75 part；Flow ability modifying agent, 0.3 part.
A kind of photovoltaic generation preparation method of direct current cables insulating materials, comprises the following steps：
1) get the raw materials ready, LLDPE, ethylene-vinyl acetate copolymer, maleic anhydride are got ready by suitable number
Grafted Polyethylene, inorganic nano alundum (Al2O3), antioxidant 1010, Silane Grafted agent, DCP initiators, flow ability modifying agent；
2) Insulation Material master batch is prepared, by flow ability modifying agent, LLDPE, the poly- second of modified by maleic acid anhydride graft
Alkene, inorganic nano alundum (Al2O3) and antioxidant 1010 are well mixed, and photovoltaic generation direct current is prepared by double screw extruder
Cable insulating material master batch, the temperature of double screw extruder is 150~200 DEG C, and uses 500~800 mesh filter screen filtration impurity,
Then pelletizing granulation is carried out, Insulation Material master batch is obtained by drying；
3) Insulation Material, the insulation master batch that will be prepared and LLDPE, ethylene-vinyl acetate copolymerization are prepared
Thing dispensing in proportion, vacuum drying is carried out 10~15 minutes at 70~100 DEG C by mixer mixing, finally at ambient pressure plus
Enter Silane Grafted agent and DCP initiators, knead 30~60 minutes, it is exhausted that insulation obtains photovoltaic generation direct current cables in 10 minutes or so
Edge material.
Further, the step 2) in, the temperature of double screw extruder is 170 DEG C.
Further, the step 2) in selection screen pack mesh number be 600 mesh.
Further, the step 3) in, the insulation master batch and LLDPE, ethyl vinyl acetate that will be prepared
Vinyl ester copolymers dispensing in proportion, carries out vacuum drying 15 minutes, at ambient pressure at 85 DEG C by mixer mixing finally
Silane Grafted agent and DCP initiators are added, is kneaded 45 minutes, insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes.
The advantage of the invention is that：The present invention is that modified by maleic acid anhydride graft is added in linear low density polyethylene resin
Polyethylene and inorganic nano alundum (Al2O3), it is exhausted that the method being blended by banbury is prepared for a kind of photovoltaic generation direct current cables
Edge material, the generation and distribution of insulating interior space electric charge are improved by inorganic nano alundum (Al2O3), and by maleic acid
The effect of acid anhydride Grafted Polyethylene, can effectively suppress the movement of insulating inner cation, and then reduce space charge
Gather, improve insulating inner electric field, improve insulating materials specific insulation.With the addition of modified by maleic acid anhydride graft polyethylene
And the insulating materials of the inorganic nano alundum (Al2O3) phenomenon that insulating inner almost gathers without electric field under 30kV/mm electric fields.
Brief description of the drawings
The distribution of space charge figure that Fig. 1 materials pressurize 30 minutes under 30kV/mm electric fields；
The distribution of space charge figure that Fig. 2 materials pressurize 30 minutes under 30kV/mm electric fields；
The distribution of space charge figure that Fig. 3 materials pressurize 30 minutes under 30kV/mm electric fields.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1
A kind of photovoltaic generation direct current cables insulating materials, including the raw material of components by weight percent once：Linear low density polyethylene
Alkene, 100 parts；Ethylene-vinyl acetate copolymer, 20 parts；Modified by maleic acid anhydride graft polyethylene, 7 parts；Inorganic nano three is aoxidized
Two aluminium, 2 parts；Antioxidant 1010,0.8 part；Silane Grafted agent, 2.5 parts；DCP initiators, 0.75 part；Flow ability modifying agent, 0.3 part.
Further, described silane section grafting agent is A171, vinyltrimethoxy silane.
Further, described flow ability modifying agent is the mixture of PE waxes and pitch.
Further, the PE waxes and pitch mixed proportion are 1:0.1.
A kind of photovoltaic generation preparation method of direct current cables insulating materials, comprises the following steps：
1) get the raw materials ready, LLDPE, ethylene-vinyl acetate copolymer, maleic anhydride are got ready by suitable number
Grafted Polyethylene, inorganic nano alundum (Al2O3), antioxidant 1010, Silane Grafted agent, DCP initiators, flow ability modifying agent；
2) Insulation Material master batch is prepared, by flow ability modifying agent, LLDPE, the poly- second of modified by maleic acid anhydride graft
Alkene, inorganic nano alundum (Al2O3) and antioxidant 1010 are well mixed, and photovoltaic generation direct current is prepared by double screw extruder
Cable insulating material master batch, the temperature of double screw extruder is 170 DEG C, and uses 600 mesh filter screen filtration impurity, is then cut
Grain granulation, Insulation Material master batch is obtained by drying；
3) Insulation Material, the insulation master batch that will be prepared and LLDPE, ethylene-vinyl acetate copolymerization are prepared
Thing dispensing in proportion, vacuum drying 15 minutes is carried out at 85 DEG C by mixer mixing, finally adds silane to connect at ambient pressure
Branch agent and DCP initiators, knead 45 minutes, and insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes or so.
Embodiment 2
A kind of photovoltaic generation direct current cables insulating materials, including the raw material of components by weight percent once：Linear low density polyethylene
Alkene, 100 parts；Ethylene-vinyl acetate copolymer, 30 parts；Modified by maleic acid anhydride graft polyethylene, 5 parts；Inorganic nano three is aoxidized
Two aluminium, 5 parts；Antioxidant 1010,0.1 part；Silane Grafted agent, 5 parts；DCP initiators, 0.05 part；Flow ability modifying agent, 0.5 part.
Further, described silane section grafting agent is A171, vinyltrimethoxy silane.
Further, described flow ability modifying agent is the mixture of PE waxes and pitch.
Further, the PE waxes and pitch mixed proportion are 1:0.01.
A kind of photovoltaic generation preparation method of direct current cables insulating materials, comprises the following steps：
1) get the raw materials ready, LLDPE, ethylene-vinyl acetate copolymer, maleic anhydride are got ready by suitable number
Grafted Polyethylene, inorganic nano alundum (Al2O3), antioxidant 1010, Silane Grafted agent, DCP initiators, flow ability modifying agent；
2) Insulation Material master batch is prepared, by flow ability modifying agent, LLDPE, the poly- second of modified by maleic acid anhydride graft
Alkene, inorganic nano alundum (Al2O3) and antioxidant 1010 are well mixed, and photovoltaic generation direct current is prepared by double screw extruder
Cable insulating material master batch, the temperature of double screw extruder is 200 DEG C, and uses 700 mesh filter screen filtration impurity, is then cut
Grain granulation, Insulation Material master batch is obtained by drying；
3) Insulation Material, the insulation master batch that will be prepared and LLDPE, ethylene-vinyl acetate copolymerization are prepared
Thing dispensing in proportion, vacuum drying 15 minutes is carried out at 85 DEG C by mixer mixing, finally adds silane to connect at ambient pressure
Branch agent and DCP initiators, knead 60 minutes, and insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes.
Further, the step 3) in, the insulation master batch and LLDPE, ethyl vinyl acetate that will be prepared
Vinyl ester copolymers dispensing in proportion, carries out vacuum drying 15 minutes, at ambient pressure at 85 DEG C by mixer mixing finally
Silane Grafted agent and DCP initiators are added, is kneaded 45 minutes, insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes.
Embodiment 3
A kind of photovoltaic generation direct current cables insulating materials, including the raw material of components by weight percent once：Linear low density polyethylene
Alkene, 100 parts；Ethylene-vinyl acetate copolymer, 10 parts；Modified by maleic acid anhydride graft polyethylene, 10 parts；The oxygen of inorganic nano three
Change two aluminium, 1 part；Antioxidant 1010,2 parts；Silane Grafted agent, 1 part；DCP initiators, 0.1 part；Flow ability modifying agent, 0.1 part.
Further, described silane section grafting agent is A171, vinyltrimethoxy silane.
Further, described flow ability modifying agent is the mixture of PE waxes and pitch.
Further, the PE waxes and pitch mixed proportion are 1:0.2.
A kind of photovoltaic generation preparation method of direct current cables insulating materials, comprises the following steps：
1) get the raw materials ready, LLDPE, ethylene-vinyl acetate copolymer, maleic anhydride are got ready by suitable number
Grafted Polyethylene, inorganic nano alundum (Al2O3), antioxidant 1010, Silane Grafted agent, DCP initiators, flow ability modifying agent；
2) Insulation Material master batch is prepared, by flow ability modifying agent, LLDPE, the poly- second of modified by maleic acid anhydride graft
Alkene, inorganic nano alundum (Al2O3) and antioxidant 1010 are well mixed, and photovoltaic generation direct current is prepared by double screw extruder
Cable insulating material master batch, the temperature of double screw extruder is 150 DEG C, and uses 600 mesh filter screen filtration impurity, is then cut
Grain granulation, Insulation Material master batch is obtained by drying；
3) Insulation Material, the insulation master batch that will be prepared and LLDPE, ethylene-vinyl acetate copolymerization are prepared
Thing dispensing in proportion, vacuum drying 10 minutes is carried out at 75 DEG C by mixer mixing, finally adds silane to connect at ambient pressure
Branch agent and DCP initiators, knead 50 minutes, and insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes.
The distribution of space charge difference that material prepared by above example 1-3 pressurizes 30 minutes under 30kV/mm electric fields
As shown in Figure 1, Figure 2, Fig. 3.Material prepared by embodiment one, internal to be produced almost without space charge, electric field does not have any abnormal substantially
Become；Material internal prepared by embodiment two has a small amount of space charge, and electric field there occurs slight change；Embodiment three is made
Standby material internal space charge induces more positive charge than embodiment more than two on anode, and electric field distortion is bigger.
The advantage of the invention is that：The present invention is that modified by maleic acid anhydride graft is added in linear low density polyethylene resin
Polyethylene and inorganic nano alundum (Al2O3), it is exhausted that the method being blended by banbury is prepared for a kind of photovoltaic generation direct current cables
Edge material, the generation and distribution of insulating interior space electric charge are improved by inorganic nano alundum (Al2O3), and by maleic acid
The effect of acid anhydride Grafted Polyethylene, can effectively suppress the movement of insulating inner cation, and then reduce space charge
Gather, improve insulating inner electric field, improve insulating materials specific insulation.With the addition of modified by maleic acid anhydride graft polyethylene
And the insulating materials of the inorganic nano alundum (Al2O3) phenomenon that insulating inner almost gathers without electric field under 30kV/mm electric fields.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.And, term " including ", "comprising" or its any other variant be intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these modification or
Replace, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (9)
1. a kind of photovoltaic generation direct current cables insulating materials, it is characterised in that the raw material including components by weight percent once：It is linear low
Density polyethylene, 100 parts；Ethylene-vinyl acetate copolymer, 10~30 parts；Modified by maleic acid anhydride graft polyethylene, 5~10
Part；Inorganic nano alundum (Al2O3), 1~5 part；Antioxidant 1010,0.1~2 part；Silane Grafted agent, 1~5 part；DCP initiators,
0.05-0.1 parts；Flow ability modifying agent, 0.1~0.5 part.
2. a kind of photovoltaic generation direct current cables insulating materials according to claim 1, it is characterised in that described silane
Section grafting agent is A171, vinyltrimethoxy silane.
3. a kind of photovoltaic generation direct current cables insulating materials according to claim 1, it is characterised in that described flowing
Modifying agent is the mixture of PE waxes and pitch.
4. a kind of photovoltaic generation direct current cables insulating materials according to claim 3, it is characterised in that the PE waxes and
Pitch mixed proportion is 1:0.01~1:0.2.
5. a kind of photovoltaic generation direct current cables insulating materials according to claim 1, it is characterised in that linea low density
Polyethylene, 100 parts；Ethylene-vinyl acetate copolymer, 20 parts；Modified by maleic acid anhydride graft polyethylene, 7 parts；Inorganic nano three
Al 2 O, 2 parts；Antioxidant 1010,0.8 part；Silane Grafted agent, 2.5 parts；DCP initiators, 0.75 part；Flow ability modifying agent,
0.3 part.
6. a kind of according to claim 1-5 any described photovoltaic generations preparation method of direct current cables insulating materials, it is special
Levy and be, comprise the following steps：
1) get the raw materials ready, getting LLDPE, ethylene-vinyl acetate copolymer, maleic anhydride ready by suitable number is grafted
Modified poly ethylene, inorganic nano alundum (Al2O3), antioxidant 1010, Silane Grafted agent, DCP initiators, flow ability modifying agent；
2) Insulation Material master batch is prepared, by flow ability modifying agent, LLDPE, modified by maleic acid anhydride graft polyethylene, nothing
Machine nano-aluminium oxide and antioxidant 1010 are well mixed, prepare photovoltaic generation direct current cables by double screw extruder exhausted
Edge material master batch, the temperature of double screw extruder is 150~200 DEG C, and uses 500~800 mesh filter screen filtration impurity, Ran Houjin
Row pelletizing is granulated, and Insulation Material master batch is obtained by drying；
3) prepare Insulation Material, the insulation master batch that will be prepared and LLDPE, ethylene-vinyl acetate copolymer by
Ratio dispensing, vacuum drying is carried out 10~15 minutes at 70~100 DEG C by mixer mixing, and silicon is finally added at ambient pressure
Alkane grafting agent and DCP initiators, knead 30~60 minutes, and insulation obtains photovoltaic generation direct current cables for 10 minutes or so and insulate
Material.
7. a kind of photovoltaic generation direct current cables insulating materials and preparation method thereof, it is characterised in that the step 2) in, double spiral shells
The temperature of bar extruder is 170 DEG C.
8. a kind of photovoltaic generation direct current cables insulating materials and preparation method thereof, it is characterised in that the step 2) in selection
The mesh number of screen pack is 600 mesh.
9. a kind of photovoltaic generation direct current cables insulating materials and preparation method thereof, it is characterised in that the step 3) in, will make
The insulation master batch got ready and LLDPE, ethylene-vinyl acetate copolymer dispensing in proportion, pass through at 85 DEG C
Mixer mixing carries out vacuum drying 15 minutes, and Silane Grafted agent and DCP initiators are finally added at ambient pressure, kneads 45 points
Clock, insulation obtains photovoltaic generation direct current cables Insulation Material for 10 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107383538A (en) * | 2017-08-10 | 2017-11-24 | 全球能源互联网研究院 | High voltage direct current cable high-dispersion nano composite ultra-clean Insulation Material and preparation method thereof |
| CN107903475A (en) * | 2017-12-13 | 2018-04-13 | 马鞍山松鹤信息科技有限公司 | A kind of special high cold-resistant material of photovoltaic generation case and its preparation process |
| CN111825913A (en) * | 2019-04-19 | 2020-10-27 | 南京中超新材料股份有限公司 | Nano modified insulating material for high-voltage direct-current cable and preparation method thereof |
| WO2021035713A1 (en) * | 2019-08-30 | 2021-03-04 | Dow Global Technologies Llc | Photovoltaic encapsulant films comprising fumed alumina |
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| CN111825913A (en) * | 2019-04-19 | 2020-10-27 | 南京中超新材料股份有限公司 | Nano modified insulating material for high-voltage direct-current cable and preparation method thereof |
| WO2021035713A1 (en) * | 2019-08-30 | 2021-03-04 | Dow Global Technologies Llc | Photovoltaic encapsulant films comprising fumed alumina |
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