+/-535kV ultrahigh-voltage flexible direct-current insulated power cable

A flexible DC and power cable technology, applied in the direction of insulated cables, power cables with shielding layer/conductive layer, insulators, etc., can solve the problems of increasing cable weight, cross-linking by-products are not easy to remove, difficult to recycle and reuse, etc. Achieve the effects of reducing the number of shutdowns for cleaning, continuous production without joints, and reducing the overall consumption of raw materials

Active Publication Date: 2021-03-09
宁波东方电缆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cross-linked polyethylene is a thermosetting material, which cannot be recycled and reused after the service life expires and is difficult to degrade. The cross-linked by-products are not easy to remove, and it is difficult to control the purity of cables. Large space, high energy consumption and low efficiency
In addition, cross-linked polyethylene is thermosetting, and it is difficult to recycle and reuse cables after they reach the end of their service life. They can only be incinerated or landfilled. The pressure on environmental protection is huge and it is easy to cause environmental pollution.
The traditional cross-linked polyethylene insulation poses a great threat to energy waste and environmental pollution because it cannot be recycled and reused. It does not conform to the current international concept of sustainable development of resource applications. 0.94g / cm3 virtually increases the weight of the cable, which brings great inconvenience to construction and transportation; Extensive opportunities for development

Method used

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  • +/-535kV ultrahigh-voltage flexible direct-current insulated power cable
  • +/-535kV ultrahigh-voltage flexible direct-current insulated power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: if figure 1 As shown, a ±535kV ultra-high voltage flexible direct current lightweight polypropylene insulated power cable includes a direct current unit, a semiconductive resistance water layer 1 is arranged outside the direct current unit, a metal armor layer 2 is arranged outside the semiconductive resistance water layer 1, and a metal armor layer 2 is arranged outside the semiconductive resistance water layer 1. The armor layer 2 is provided with an anti-corrosion layer 3, the anti-corrosion layer 3 is provided with an outer sheath 4, the outer sheath 4 is provided with a semi-conductive layer 5, and the DC unit includes a water-blocking conductor layer 6, which is sequentially arranged from the inside to the outside. The material of the semi-conductive Tedron tape 7, the inner shielding layer 8, the insulating layer 9 and the insulating shielding layer 10 is modified polypropylene, and the material of the inner shielding layer 8 and the insulating shi...

Embodiment 2

[0025] Embodiment two: other is identical with embodiment one, and its difference is:

[0026] In this specific example, the modified polypropylene (OCPP) is made of the following raw materials in parts by mass: polypropylene 85, nanometer organically modified montmorillonite 1.2, calcium hardate 13, acetophenone (AP) 0.5, Sodium hydroxymethyl cellulose 12, rutile nano silica 0.9, wood fiber 1.1, shrinkage uniform additive 0.4, synergistic antioxidant 0.3, nano reinforcement 1.0.

[0027] In this specific example, the synergistic antioxidant includes a primary antioxidant and an auxiliary antioxidant, the primary antioxidant is 4,4'-thiobis(6-tert-butyl-3-methylphenol), and the auxiliary The antioxidants are tris[2.4-di-tert-butylphenyl]phosphite and dolin aromatics, and the weight ratio of the main antioxidant to the auxiliary antioxidant is 1:0.6.

[0028] In this specific example, the nano-reinforcing agent is polyhedral oligomeric silsesquioxane (POSS) with a particle siz...

Embodiment 3

[0030] Embodiment three: other is the same as embodiment one, and its difference is: polypropylene is made of the raw material of following mass parts: polypropylene 105, nano organically modified montmorillonite 1.5, calcium hardate 15, acetophenone 0.8, hydroxymethylcellulose sodium 16, rutile nano-silica 1.0, wood fiber 1.2, shrinkage uniform additive 0.6, synergistic antioxidant 0.5, nano-reinforcing agent 1.2.

[0031] In this specific example, the synergistic antioxidant includes a primary antioxidant and an auxiliary antioxidant, the primary antioxidant is 4,4'-thiobis(6-tert-butyl-3-methylphenol), and the auxiliary Antioxidant is three [2.4-di-tert-butylphenyl] phosphite, dolin arene, and the weight ratio of main antioxidant and auxiliary antioxidant is 1: 1.1.

[0032] In this specific example, the nano-reinforcing agent is polyhedral oligomeric silsesquioxane (POSS) with a particle size of 1.6 nm.

[0033] In this specific embodiment, the uniform shrinkage additive ...

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Abstract

The invention discloses a +/-535kV ultrahigh-voltage flexible direct-current light polypropylene insulated power cable, and the cable is characterized in that a semi-conductive waterproof layer is arranged outside a direct-current unit, a metal armor layer is arranged outside the semi-conductive waterproof layer, an anti-corrosion layer is arranged outside the metal armor layer, an outer protective layer is arranged outside the anti-corrosion layer, and a semi-conductive layer is arranged outside the outer protective layer; the direct current unit comprises a water blocking conductor layer, asemi-conductive Tetoron belt, an inner shielding layer, an insulating layer and an insulating shielding layer which are sequentially arranged from inside to outside, the insulating layer is made of modified polypropylene, and the inner shielding layer and the insulating shielding layer are made of a direct current shielding material; compared with a cross-linked polyethylene power cable, the cablehas the advantages that the power cable is reduced by 26%, the long-term working temperature is not lower than 110 DEG C, common plastic extrusion molding is adopted, the extrusion linear speed is higher, no scorch is generated, continuous production can be realized, large-length joint-free continuous production can be realized, the production efficiency is high, and the process is simple; and the cable has better mechanical property, electrical property and insulating strength.

Description

technical field [0001] The invention relates to a power cable, in particular to a ±535kV ultra-high voltage flexible DC insulated power cable. Background technique [0002] As the country continues to strengthen the grid-connected integration in the field of smart grid construction, ultra-high voltage flexible DC power cables have ushered in broad market opportunities. Flexible DC transmission technology has strong technical advantages for improving the dynamic stability of the AC system, increasing the dynamic reactive power reserve of the system, improving the power quality of the AC system, and solving the problems caused by nonlinear loads and impact loads. It is also an important technical means to solve large-capacity, long-distance, intermittent new energy generation grid connection in the construction of smart grid. [0003] The cable insulation materials currently in use generally use polyethylene resin as the matrix material, and the working temperature is usually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/44H01B7/02H01B7/18H01B7/28H01B9/02
CPCH01B3/441H01B7/02H01B7/2806H01B7/18H01B9/02
Inventor 夏峰刘凤伟陈磊张永明潘矗直钟宁涛陈盖杰王璐韩哲
Owner 宁波东方电缆股份有限公司
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