CN210692183U

CN210692183U - Electric control composite direct current cable

Info

Publication number: CN210692183U
Application number: CN201921553432.XU
Authority: CN
Inventors: 余德平; 刘焕新; 李金堂; 孟益标; 梁增显
Original assignee: Zhejiang Wanma Co Ltd
Current assignee: Zhejiang Wanma Co Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-06-05
Anticipated expiration: 2029-09-18

Abstract

The utility model relates to a more swift, efficient method also provides the automatically controlled compound DC cable of guarantee for the more stable long-term operation of system simultaneously, including two piece at least cross-sections for circular shape conductor and conductor shielding layer, still be equipped with insulating cover, insulating shielding layer, semiconduction buffer layer and metallic shield outside every conductor shielding layer, the cladding has the cross-section to be the circular shape band of waist outside metallic shield, is equipped with the oversheath outside the band, is equipped with control cable conductor and cable filler in the space department of band and metallic shield. The utility model discloses a flexible direct current cable of automatically controlled compound 10kV has the function of multiple cable through a cable, provides a more swift, efficient method for direct current system construction, also provides the guarantee for the system more stabilizes long-term running simultaneously.

Description

Electric control composite direct current cable

Technical Field

The utility model relates to a cable especially relates to a more swift, efficient method, also provides the automatically controlled compound direct current cable of guarantee for the more stable long-term operation of system simultaneously.

Background

For a long time, alternating current power transmission is a main power transmission mode because alternating current power generation is relatively simple and does not need rectification, and alternating current power transmission is convenient for voltage transformation and is convenient for adopting high-voltage power transmission to reduce loss. However, with the development of power systems, the increase of transmission capacity and distance, the problems of stability in ac transmission, short-circuit capacity under a cut-off fault, and the like are increasingly complicated, and today, new technologies such as high-power thyristors, automatic control of dc transmission, and the like are developed, the dc transmission technology becomes possible and develops rapidly, and is widely applied worldwide.

Compared with alternating current transmission, the direct current transmission has the following advantages: (1) there is no stability problem. (2) The direct current transmission not only has no stability problem, but also can improve the stability of alternating current systems at two ends of the direct current transmission. (3) The direct current circuit has low manufacturing cost which is about 65 percent of that of the direct current circuit with the same level voltage, and the consumption of nonferrous metals is small. (4) The conveying capacity is large. The power that can be transmitted by direct current transmission is about 1.5 times of the power transmitted by alternating current transmission with the same voltage. (5) The line loss is small. The direct current transmission has no reactive current, and the current and power loss of the line are smaller than those of the alternating current transmission. (6) The direct current transmission has a strong adaptability to the increase of power and transmission voltage. (7) And the power transmission reliability is high. (8) control of power flow in direct current transmission is easier than in alternating current transmission. (9) The interference of direct current transmission to communication is small, the operation of grid connection and disconnection is simpler than that of alternating current, and the system with different frequencies can be connected.

The +/-10 kV flexible direct-current cable is used on a direct-current transmission line. The existing common +/-10 kV flexible direct current cable only has one function of transmitting electric energy, and the unique function cannot meet the requirement that the development of the modern society needs to have more functions on the flexible direct current cable, such as transmitting control signals while transmitting electric energy. The structure of a common +/-10 kV flexible direct-current cable is as follows: conductor + conductor shield + insulation shield + metal shield + filling + tape + oversheath.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve present ordinary flexible DC cable of 10kV only transmit electric energy a function, this sole function can't satisfy the requirement that modern society development need possess more functions to flexible DC cable, also can transmit control signal's defect and provide a more swift, efficient method when transmitting the electric energy, also provide the automatically controlled compound DC cable of guarantee for the more stable long-term operation of system simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electric control composite direct current cable comprises at least two conductors and conductor shielding layers, wherein the cross sections of the conductors and the conductor shielding layers are circular, an insulating sleeve, an insulating shielding layer, a semi-conductive buffer layer and a metal shielding layer are further arranged outside each conductor shielding layer, wrapping bands with the cross sections being waist-circular are wrapped outside the metal shielding layers, an outer sheath is arranged outside each wrapping band, and a control cable conductor and a cable filler are arranged in a gap between each wrapping band and the metal shielding layer. In this technical scheme, mainly implant control cable between two insulation core of cable, just make the cable have the many functional type DC cable that transmits electric energy also has transmission control signal promptly from the cable structural design, this automatically controlled compound 10kV flexible DC cable structure is: conductor + conductor shield + insulation shield + metal shield + filling (control cable) + tape + oversheath. And implanting a control cable when the insulated wire cores are stranded in a cabling way.

After the whole direct current cable line is laid, the main core conductor of the electric control composite +/-10 kV flexible direct current cable is connected with a power supply system of a transformer substation and is responsible for transmitting direct current and ensuring the normal operation of a direct current power system; the control cable is connected with various electrical equipment controllers together and is responsible for the transmission of various control models, so that the normal operation of various control equipment is ensured, and one-line multifunctional is realized.

Preferably, the number of the control cable conductors is 4.

Preferably, the control cable conductor has a circular cross-section.

Preferably, a control cable insulating layer, a control cable wrapping tape, a control cable shielding layer and a control cable outer sheath are arranged on the outer side of the control cable conductor.

Preferably, the outer sheath of the control cable is a low-smoke halogen-free sheath added with antioxidant according to 1.5%.

Preferably, the cable filler is filled with an aluminum hydroxide flame retardant modified with a silane surface modifier. The aluminum hydroxide fire retardant modified by the silane surface modifier is adopted, untreated aluminum hydroxide is an inorganic filler with strong polarity, the aluminum hydroxide is filled in a polyolefin high polymer material, the physical and mechanical properties of a system are greatly reduced due to poor compatibility, the surface polarity is reduced after the aluminum hydroxide fire retardant is modified by the surface modifier, the hydrophilicity is changed into hydrophobicity, the dispersing capacity of powder is improved, the system is more uniform, and the processing and the anti-aging performance of the material are facilitated.

Preferably, the outer sheath is a low-smoke halogen-free sheath added with antioxidant according to 1.5%.

The utility model has the advantages that: the utility model discloses a flexible direct current cable of automatically controlled compound 10kV has the function of multiple cable through a cable, provides a more swift, efficient method for direct current system construction, also provides the guarantee for the system more stabilizes long-term running simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a conductor; 2. a conductor shield layer; 3. an insulating sleeve; 4. an insulating shield layer; 5. a semiconductive buffer layer; 6. a metal shielding layer; 7. wrapping belts; 8. an outer sheath; 9. a cable filler; 10. a control cable conductor; 11. a control cable insulation layer; 12. controlling a cable tape; 13. a control cable shielding layer; 14. and a control cable outer sheath.

Detailed Description

The present invention will be further described in detail by the following specific embodiments in conjunction with the accompanying drawings:

examples

Referring to fig. 1, the electric control composite dc cable includes two conductors 1 with circular cross-section, the conductors 1 have the same wire diameter, the conductors are parallel to each other, the outer side of each conductor is provided with a conductor shielding layer 2, an insulating sleeve 3, an insulating shielding layer 4, a semi-conductive buffer layer 5 and a metal shielding layer 6, the metal shielding layers 6 at the outermost layers of the two conductors are tangent, a wrapping tape 7 is wrapped on the periphery, a cable filler 9 is filled in a gap between the wrapping tape 7 and the metal shielding layer 6, a control cable is embedded in the cable filler, the control cable comprises 4 control cable conductors 10 with the same wire diameter and circular cross section, a control cable insulating layer 12 is arranged outside each control cable conductor 1, the insulating layers of the 4 control cables are externally tangent to each other and are wrapped in a control cable wrapping tape 12, a control cable shielding layer 13 and a control cable outer sheath 14 are arranged outside the control cable wrapping tape 12.

The outer sheath 14 and the outer sheath 8 of the control cable are low-smoke halogen-free sheaths added with antioxidant according to 1.5 percent.

The cable filler is filled with an aluminum hydroxide flame retardant modified by a silane surface modifier.

Control cable is implanted between two insulation core of cable, just makes the cable have the many functional type direct current cable that transmission electric energy also has transmission control signal promptly from the cable structural design, and this automatically controlled compound 10kV flexible direct current cable structure is: conductor + conductor shield + insulation shield + metal shield + filling (control cable) + tape + oversheath. And implanting a control cable when the insulated wire cores are stranded in a cabling way.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. An electric control composite direct current cable comprises at least two conductors (1) and conductor shielding layers (2) with circular cross sections, and is characterized in that an insulating sleeve (3), an insulating shielding layer (4), a semi-conductive buffer layer (5) and a metal shielding layer (6) are further arranged outside each conductor shielding layer (2), wrapping belts (7) with circular cross sections are wrapped outside the metal shielding layers (6), outer sheaths (8) are arranged outside the wrapping belts (7), and control cable conductors (10) and cable fillers (9) are arranged in gaps between the wrapping belts (7) and the metal shielding layers (6).

2. An electrically controlled composite direct current cable according to claim 1, characterized in that the number of control cable conductors (10) is 4.

3. An electrically controlled composite direct current cable according to claim 2, characterized in that the cross-section of the control cable conductor (10) is circular.

4. The electric control composite direct current cable according to claim 1, wherein a control cable insulating layer (11), a control cable wrapping tape (12), a control cable shielding layer (13) and a control cable outer sheath (14) are arranged outside the control cable conductor (10).