CN110628138A - Medium-voltage anti-torsion power cable for wind generating set and insulating material thereof - Google Patents
Medium-voltage anti-torsion power cable for wind generating set and insulating material thereof Download PDFInfo
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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
- 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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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
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention discloses a medium-voltage anti-torsion power cable for a wind generating set and an insulating material thereof, wherein the insulating material comprises, by weight, 40-50 parts of ethylene propylene diene monomer; 1-3 parts of microcrystalline wax; 3-6 parts of paraffin oil; 5-12 parts of antimony trioxide; 1.3-3.7 parts of titanium dioxide; 1.6-3.4 parts of nano zinc oxide; 40-50 parts of calcined kaolin; 0.6-1.4 parts of a coupling agent; 1-2 parts of an anti-aging agent; 1.6-2.5 parts of a vulcanizing agent; 0.8-1.6 parts of a vulcanization assistant. The ethylene propylene rubber insulating material with high temperature resistance and the highest tolerance of 105 ℃ is used for insulating the anti-torque power cable of the 8MW offshore wind generating set, meets various power transmission and use performances of the anti-torque power cable with high current-carrying capacity of the offshore wind generating set in a normal working environment (working temperature is-40 ℃ to +105 ℃), and solves the problem that the service life of the anti-torque power cable of the 8MW offshore wind generating set is reduced due to long-term high current-carrying capacity, bending fatigue, aging and the like.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a medium-voltage anti-torsion power cable insulating material for a wind generating set and a medium-voltage anti-torsion power cable for the wind generating set using the insulating material.
Background
Compared with a land wind power plant, an offshore wind field has a very complex and severe marine environment where wind field fans are located, bears various random loads which change along with time and space, and comprises wind, sea waves, ocean currents, sea ice, tides and the like which act on a structure, and is threatened by the action of earthquakes. Under such severe environmental conditions, adverse factors such as environmental corrosion, marine organism adhesion, foundation soil erosion and basic dynamic softening, material aging, component defects and mechanical damage, fatigue and damage accumulation of crack propagation and the like all cause attenuation of structural components and overall resistance of the offshore wind turbine, and influence the operational safety and durability of the wind turbine structure. The high-carrying-capacity anti-torsion power cable of the high-power offshore wind generating set is used as an important component for power transmission of the offshore wind generating set, and also bears the influence of the severe environment where most of fans are located, and the service life of a product is seriously influenced.
The current wind energy anti-torsion power cable adopts ethylene-propylene rubber insulation, the maximum service temperature of a conductor of the ethylene-propylene rubber insulation cable is 90 ℃, and different service temperatures can influence the current-carrying capacity of the cable for a power cable. The antitorque power cable that 8MW offshore wind turbine used, compare in the higher current-carrying capacity of the power cable requirement of equal cross-section for current EPT rubber insulated's power cable influences life because of transshipping on being used in 8MW offshore wind turbine, accelerates insulating ageing simultaneously, causes partial discharge.
Disclosure of Invention
The embodiment of the invention provides a high-temperature-resistant ethylene propylene rubber insulating material with the highest tolerance of 105 ℃, which is used for insulating a torsional power cable of an 8MW offshore wind generating set, meets various power transmission and use performances of the torsional power cable with high current-carrying capacity of the offshore wind generating set in a normal working environment (the working temperature is-40 ℃ to +105 ℃), and solves the problem that the service life of the torsional power cable of the 8MW offshore wind generating set is reduced due to long-term high current-carrying capacity, bending fatigue, aging and the like.
In order to solve the technical problem, the invention provides a medium-voltage anti-torsion power cable insulating material for a wind generating set, which comprises the following components in parts by weight,
in a preferred embodiment of the present invention, the vulcanizing agent is dicumyl peroxide.
In a preferred embodiment of the present invention, the vulcanization aid is triallyl isocyanurate.
In a preferred embodiment of the present invention, the method for preparing the insulating material further comprises the steps of,
(1) putting all parts of ethylene propylene diene monomer rubber into an internal mixer for mixing uniformly;
(2) adding all parts of antimony trioxide, titanium dioxide, nano zinc oxide, microcrystalline wax, an anti-aging agent and half part of calcined kaolin into an internal mixer for mixing, adding all parts of paraffin oil after mixing for 2-3 minutes, and continuing mixing until the mixture is uniform;
(3) adding all parts of coupling agent and half part of calcined kaolin into an internal mixer for mixing uniformly;
(4) and adding all parts of vulcanizing agent and vulcanizing assistant into an internal mixer for uniform mixing to obtain the mixed rubber material for preparing the insulating material.
In a preferred embodiment of the invention, the preparation method further comprises the steps of taking the mixed rubber material, thinly passing the mixed rubber material on an open mill for 1-2 times, arranging the rubber material for 2-3 times, then splitting the mixed rubber material on a calender to form a sheet, cooling the output rubber sheet, and then passing the cooled rubber sheet through a talcum powder box to prepare the insulating material.
In a preferred embodiment of the invention, the mixing temperature of the internal mixer is 100-120 ℃.
In order to solve the technical problem, the invention also provides a medium-voltage anti-torsion power cable for the wind driven generator, which comprises at least one power wire core, at least one grounding wire core twisted with the power wire core, and an outer sheath wrapped outside the power wire core and the grounding wire core, wherein the power wire core comprises a conductor and an insulating layer wrapped outside the conductor, and the insulating layer is made of the insulating material.
In a preferred embodiment of the present invention, the power line core further includes a conductor shielding layer and an insulation shielding layer, the conductor shielding layer covers the outside of the conductor, the insulation layer covers the outside of the conductor shielding layer, and the insulation shielding layer covers the outside of the insulation layer.
In a preferred embodiment of the invention, the power cable further comprises a braided shielding layer, the braided shielding layer is wound outside the power wire core and the grounding wire core, the outer sheath is wound outside the braided shielding layer, and the braided shielding layer is a shielding layer formed by weaving a mixture of fiber wires and tinned copper wires.
In a preferred embodiment of the present invention, the power wire core and the ground wire core are twisted and then filled with a filling layer, and the filling layer is a semiconductive rubber.
The invention has the beneficial effects that:
the invention uses the insulating material with the main material of the ethylene propylene diene monomer rubber to prepare the ethylene propylene rubber insulation to replace the existing ethylene propylene rubber insulation to be used as the power wire core insulating layer of the anti-torque power cable, the highest resistance is 105 ℃, various power transmission and use performances of the anti-torque power cable with high current-carrying capacity of the offshore wind generating set under the normal working environment (the working temperature is minus 40 ℃ to plus 105 ℃) are met, and the problem that the service life of the anti-torque power cable of the 8MW offshore wind generating set is reduced due to long-term high current-carrying capacity, bending fatigue, aging and the like.
The formula of the insulating material contains antimony trioxide in a certain proportion, so that the heat resistance can be enhanced, the performance of ethylene propylene diene monomer for absorbing thermal oxygen free atoms at high temperature is improved, the thermal oxygen free atoms are prevented from reacting with a rubber main chain in a contact manner, and the heat resistance can be greatly improved compared with the conventional ethylene propylene rubber insulating material.
The formula of the insulating material contains a certain proportion of calcined kaolin, so that the insulating material is easy to disperse, has small particle capacity, reaches the nanometer level and has good suspension performance; the nano-scale rigid particles are used for filling, so that gaps among rubber molecular chains are supplemented, the reinforcing effect is improved, and the tensile strength of the formula material is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a torsional power cable in an embodiment of the present invention;
fig. 2 is a flow chart of a process for cabling a torsion resistant power cable.
The reference numbers in the figures illustrate: 2-power wire core, 21-conductor, 22-conductor shielding layer, 23-insulating layer, 24-insulating shielding layer;
4-ground wire core, 6-braided shielding layer, 8-filling layer and 10-sheath layer.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Examples
Referring to fig. 1, the medium voltage anti-torsion power cable for the wind generating set comprises three power wire cores 2, three grounding wire cores 4 and a filling layer 8 which are twisted into a cable core, wherein a braided shielding layer 6 is wrapped outside the cable core, and an extrusion molding sheath layer 10 is arranged outside the braided shielding layer 6.
In a preferred embodiment of the present invention, the filling layer 8 is a semiconductive rubber. The braided shielding layer is a shielding layer formed by weaving a mixture of fiber wires and tinned copper wires.
Specifically, the power line core 2 comprises a conductor 21, a conductor shielding layer 22 coated outside the conductor 1, an insulating layer 23 coated outside the conductor shielding layer 22, and an insulating shielding layer coated outside the insulating layer 23.
Referring to fig. 2, when the power wire core 2 is manufactured, a semi-conductive tape is wrapped after copper wire bundles are twisted, then three layers are co-extruded, and a semi-conductive conductor shielding material, an ethylene propylene rubber insulating material at 105 ℃ and a semi-conductive insulating shielding material are extruded; the specific components of the ethylene propylene rubber insulating material at the temperature of 105 ℃ are as follows:
TABLE 1
The preparation method of the 105 ℃ ethylene propylene rubber insulating material comprises the following steps:
(1) putting all parts of ethylene propylene diene monomer Kep510 into an internal mixer at 100-120 ℃ for uniform mixing;
(2) adding all parts of antimony trioxide, titanium dioxide, nano zinc oxide, microcrystalline wax, an anti-aging agent XH-3 and a half part of calcined kaolin B7 into an internal mixer for mixing, adding all parts of paraffin oil 2280 after mixing for 2-3 minutes, and continuing mixing to be uniform;
(3) adding all parts of coupling agent KH550 and half parts of calcined kaolin B7 into an internal mixer for uniform mixing;
(4) adding all parts of dicumyl peroxide and triallyl isocyanurate into an internal mixer for uniform mixing to obtain a mixed rubber material for preparing the ethylene propylene rubber insulating material at the temperature of 105 ℃;
(5) and (3) thinly passing the mixed rubber material on an open mill for 1-2 times, placing the rubber for 2-3 times, then slitting and discharging the rubber material on a calender, cooling the output rubber sheet, and passing the cooled rubber sheet through a talcum powder box to prepare the ethylene propylene rubber insulating material with the temperature of 105 ℃.
The ethylene propylene rubber insulating material at 105 ℃ prepared from the components in the second embodiment is shown in the following table 2:
TABLE 2
The process flow of the torsion resistant power cable is specifically described as follows:
referring to fig. 2, (1) model voltage specification: FDEH (105)26/35kV 3x95,
cable name and specification: 105 ℃ ethylene propylene rubber insulation 8MW offshore wind generating set anti-torsion power cable with 3 cores and 95mm power wire cores2Nominal cross-section, voltage class 26/35 kV.
(2) The specific scheme is as follows: as shown in the above-mentioned figure 1,
and (3) power wire core: twisting copper wire bundles, wrapping a semi-conductive belt, and extruding a semi-conductive conductor shielding material, a special 105 ℃ ethylene propylene rubber insulating material and a semi-conductive insulating shielding material;
a ground wire core: twisting copper wire bundles, wrapping a semi-conductive belt, and extruding the semi-conductive rubber;
weaving a shielding layer: weaving a shielding layer by adopting a mixture of a fiber wire and a tinned copper wire;
assembling a cable: cabling the metal shielding power wire core and the ground wire core together according to a proper pitch-diameter ratio, and filling semiconductive rubber in the center;
outer sheath: and sheath materials are extruded outside the cable core to serve as an outer sheath.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a wind generating set is with antitorque power cable insulation material of middling pressure which characterized in that: the composition comprises the following components in parts by weight,
2. the medium voltage anti-torsion power cable insulation material for a wind generating set according to claim 1, wherein: the vulcanizing agent is dicumyl peroxide.
3. The medium voltage anti-torsion power cable insulation material for a wind generating set according to claim 1, wherein: the vulcanizing aid is triallyl isocyanurate.
4. The medium voltage anti-torsion power cable insulation material for a wind generating set according to claim 1, wherein: the preparation method of the insulating material comprises the following steps,
(1) putting all parts of ethylene propylene diene monomer rubber into an internal mixer for mixing uniformly;
(2) adding all parts of antimony trioxide, titanium dioxide, nano zinc oxide, microcrystalline wax, an anti-aging agent and half part of calcined kaolin into an internal mixer for mixing, adding all parts of paraffin oil after mixing for 2-3 minutes, and continuing mixing until the mixture is uniform;
(3) adding all parts of coupling agent and half part of calcined kaolin into an internal mixer for mixing uniformly;
(4) and adding all parts of vulcanizing agent and vulcanizing assistant into an internal mixer for uniform mixing to obtain the mixed rubber material for preparing the insulating material.
5. The medium voltage anti-torsion power cable insulation material for a wind generating set according to claim 4, wherein: and (3) taking the mixed rubber material, thinly passing the mixed rubber material on an open mill for 1-2 times, swinging the rubber for 2-3 times, slitting and discharging the rubber material on a calender, cooling the output rubber sheet, and passing the cooled rubber sheet through a talcum powder box to prepare the insulating material.
6. The medium voltage anti-torsion power cable insulation material for a wind generating set according to claim 4, wherein: the mixing temperature of the internal mixer is 100-120 ℃.
7. A medium voltage anti-torsion power cable for a wind driven generator is characterized in that: the cable comprises at least one power wire core, at least one grounding wire core twisted with the power wire core and an outer sheath wrapping the power wire core and the grounding wire core, wherein the power wire core comprises a conductor and an insulating layer wrapping the conductor, and the insulating layer is made of the insulating material according to any one of claims 1 to 6.
8. The medium voltage anti-torque power cable for wind power generator according to claim 7, wherein: the power sinle silk still includes conductor shield and insulation shield, the conductor shield cladding is in the outside of conductor, the insulating layer cladding is in the conductor shield outside, the insulation shield cladding is outside at the insulating layer.
9. The medium voltage anti-torque power cable for wind power generator according to claim 7, wherein: the power cable further comprises a braided shielding layer, the braided shielding layer is wound outside the power wire core and the grounding wire core, the outer sheath is wound outside the braided shielding layer, and the braided shielding layer is a shielding layer formed by mixing and weaving fiber wires and tinned copper wires.
10. The medium voltage anti-torque power cable for wind power generator according to claim 7, wherein: the power wire core and the grounding wire core are twisted and then filled with a filling layer, and the filling layer is made of semi-conductive rubber.
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| CN201910804550.1A CN110628138A (en) | 2019-08-28 | 2019-08-28 | Medium-voltage anti-torsion power cable for wind generating set and insulating material thereof |
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Citations (5)
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| CN102617942A (en) * | 2012-03-30 | 2012-08-01 | 无锡市远登电缆有限公司 | Ethylene-propylene-diene monomer rubber used for manufacturing wind energy cable and preparation method thereof |
| CN203931628U (en) * | 2014-06-04 | 2014-11-05 | 安徽华宇电缆集团有限公司 | In a kind of wind power generation distortion resistant, press soft power cable |
| CN105153552A (en) * | 2015-09-18 | 2015-12-16 | 特变电工山东鲁能泰山电缆有限公司 | High-flexibility high-electric-property wire/cable insulation material and preparation method thereof |
| CN108822412A (en) * | 2018-04-12 | 2018-11-16 | 天津大学 | Promote the degaussing cable for naval vessel and its manufacturing method of current-carrying capacity |
-
2019
- 2019-08-28 CN CN201910804550.1A patent/CN110628138A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347106A (en) * | 2011-06-28 | 2012-02-08 | 江苏远洋东泽电缆股份有限公司 | Power cable for underwater shovel arm of dredger and manufacturing method thereof |
| CN102617942A (en) * | 2012-03-30 | 2012-08-01 | 无锡市远登电缆有限公司 | Ethylene-propylene-diene monomer rubber used for manufacturing wind energy cable and preparation method thereof |
| CN203931628U (en) * | 2014-06-04 | 2014-11-05 | 安徽华宇电缆集团有限公司 | In a kind of wind power generation distortion resistant, press soft power cable |
| CN105153552A (en) * | 2015-09-18 | 2015-12-16 | 特变电工山东鲁能泰山电缆有限公司 | High-flexibility high-electric-property wire/cable insulation material and preparation method thereof |
| CN108822412A (en) * | 2018-04-12 | 2018-11-16 | 天津大学 | Promote the degaussing cable for naval vessel and its manufacturing method of current-carrying capacity |
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Application publication date: 20191231 |