CN201323078Y - Power transmission cable used for wind power generation - Google Patents

Abstract

The utility model discloses a power transmission cable for wind power generation. The technical problem to be solved is to make the power transmission cable for wind power generation have strong torsion resistance, tensile resistance, wear resistance, oil resistance, low temperature resistance and high temperature resistance. performance at a lower cost. In order to solve the above technical problems, the utility model adopts the following technical solution: a power transmission cable for wind power generation, comprising an annealed copper conductor, the annealed copper conductor is covered with an insulating layer, and the cores of the insulating layer are stranded with For the reinforced steel wire rope, the insulation layer and the reinforced steel wire rope are tightly wrapped with a wrapping tape, and the wrapping tape is also extruded and covered with a sheath. The utility model adopts a soft structure steel wire rope to bear the weight of the cable, eliminates the pulling force caused by the twisting of the cable due to the change of the wind direction, and completely avoids the common wind energy cable being easily caused by the conductor to bear the weight and pulling force of the cable and causing the conductor to break or the insulation damage. Phenomenon, greatly reducing the construction and maintenance costs of wind energy farms.

Description

Transmission cables for wind power generation

technical field

The utility model relates to a power transmission cable, in particular to a power transmission cable for wind power generation.

Background technique

As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. In 2006, the new installed capacity of global wind turbines was 15,197 MW, and the cumulative installed total amounted to 74,223 MW. In recent years, the world wind energy market has been growing rapidly every year. It is estimated that in the next 20-25 years, the world wind energy market will increase by 25% every year. All countries in the world will not only continue to increase their investment in wind energy development and utilization, but also the wind power equipment manufacturing industry will become the most popular economic field in many countries, and the corresponding market size will also expand dramatically.

my country's wind power industry is developing relatively rapidly, but there is still a big gap with the development level of the international wind power industry. Domestic wind power equipment mainly relies on imports and is highly dependent on foreign countries. Although the cost of wind power has dropped a lot, the advantage over thermal power costs is It will not be obvious in the short term, and there are still many obstacles to the development of the wind power industry. In 2006, my country began to implement the "Renewable Energy Law", and the pace of wind power construction was significantly accelerated. According to incomplete statistics, by the end of 2007, about 80 wind farms had been built nationwide, with a total installed capacity of about 2.3 million kilowatts, an increase of more than 1 million kilowatts compared with 2005, and a growth rate of more than 80%. According to the national plan, China's wind power installed capacity will reach 30 million kilowatts by 2020, and the development prospect is very promising.

The general trend of the unit kilowatt investment cost of wind farm construction in my country is declining, but it is still very high compared with countries with rapid wind power development in the world. This is mainly because the key main units and auxiliary facilities for wind power generation still rely on There are still many obstacles to the development of the wind power industry. One of the key reasons for this is that the existing wind power transmission cables generally have problems such as single structure, high cost, and poor performance, which lead to high wind power transmission costs and become an important factor hindering the development of wind power generation in my country.

Contents of the invention

The technical problem to be solved by the utility model is to provide a low-cost transmission cable for wind power generation with strong torsion resistance, tensile resistance, wear resistance, oil resistance, low temperature resistance and high temperature resistance.

In order to solve the above technical problems, the utility model adopts the following technical solution: a power transmission cable for wind power generation, comprising an annealed copper conductor, the annealed copper conductor is covered with an insulating layer, and the cores of the insulating layer are stranded with For the reinforced steel wire rope, the insulation layer and the reinforced steel wire rope are tightly wrapped with a wrapping tape, and the wrapping tape is also extruded and covered with a sheath.

Fillers are filled between the insulating layer and the reinforced steel wire rope in the utility model.

The soft copper conductor described in the utility model is the fifth soft copper conductor structure.

The insulating layer described in the utility model is a structure of nitrile polyvinyl chloride insulating material.

The reinforced steel wire rope described in the utility model is a soft structure steel wire rope.

The sheath of the utility model is a nitrile polyvinyl chloride sheath material structure.

Compared with the prior art, the utility model adopts a soft structure steel wire rope to bear the weight of the cable, eliminates the pulling force caused by the twisting of the cable due to the change of the wind direction, and completely avoids the fact that the ordinary wind energy cable is easy to bear the weight and pulling force of the cable by the conductor. The phenomenon of conductor breakage or insulation damage is caused, which greatly reduces the construction and maintenance costs of wind energy farms.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, the power transmission cable for wind power generation of the present utility model comprises soft copper conductor 1, and soft copper conductor 1 is the fifth kind of soft copper conductor structure (according to GB/T 3956-1997), such as tinned or not tinned The annealed annealed copper wire is made by bundle twisting or double twisting. The soft copper conductor 1 is covered with an insulating layer 2, and the insulating layer 2 is a nitrile polyvinyl chloride insulating material structure. A reinforced steel wire rope 4 is twisted between the wire cores of the insulating layer 2, and the reinforced steel wire rope 4 is a steel wire rope of soft structure, and fillers 3 are filled between the wire cores of the insulating layer 2 and the reinforced steel wire rope 4. The wire core of the insulating layer 2 and the reinforced steel wire rope 4 are tightly wrapped with a wrapping tape 5 . The wrapping tape 5 is also extruded and covered with a sheath 6, and the sheath 6 is a nitrile polyvinyl chloride sheath material structure.

When the utility model is produced, a layer of nitrile polyvinyl chloride insulating soft material with high and low temperature resistance and oil resistance is extruded and coated on the conductor made of tinned or non-tinned annealed annealed copper wire through bundle twisting or double twisting, and Twisted with the soft structure steel wire rope, the steel wire rope can be extruded and covered with insulating layer or not. Wrapped, filled and rounded by fillers, extruded and coated with a layer of nitrile polyvinyl chloride sheath material with oil resistance, high and low temperature resistance, and wear resistance.

The utility model adopts a soft structure steel wire rope to bear the weight of the cable, and adopts the Z-S (right-left) way to twist the wire core, which eliminates the pulling force caused by the twisting of the cable due to the change of the wind direction, and completely avoids the common wind energy cable from being pulled by the conductor. Bearing the cable's own weight and tension, it is easy to cause the conductor to break or the insulation to be damaged, which greatly reduces the construction and maintenance costs of the wind energy farm. The utility model has the advantages of reasonable and simple structure, easy production and low cost, and fully meets the requirements of the wind power cable with strong torsion resistance, tensile resistance, wear resistance, oil resistance, low temperature resistance and high temperature resistance.

Claims (6)

1. A power transmission cable for wind power generation, comprising an annealed copper conductor (1), characterized in that: the outer sheath of the annealed copper conductor (1) is covered with an insulating layer (2), and the outer core of the insulating layer (2) is A reinforced steel wire rope (4) is twisted between them, and the insulating layer (2) and the reinforced steel wire rope (4) are tightly wrapped with a wrapping tape (5), and the wrapping tape (5) is also extruded and coated with Sheath (6). 2. The power transmission cable for wind power generation according to claim 1, characterized in that fillers (3) are filled between the insulating layer (2) and the reinforced steel wire rope (4). 3. The power transmission cable for wind power generation according to claim 1 or 2, characterized in that the annealed copper conductor (1) is the fifth annealed copper conductor structure. 4. The power transmission cable for wind power generation according to claim 3, characterized in that: the insulating layer (2) is a nitrile polyvinyl chloride insulating material structure. 5. The power transmission cable for wind power generation according to claim 4, characterized in that: the reinforced steel wire rope (4) is a soft structural steel wire rope. 6. The power transmission cable for wind power generation according to claim 5, characterized in that: the sheath (6) is a nitrile polyvinyl chloride sheath material structure.