Overhead conductor anti-dancing discharge device

Abstract

The present invention provides an overhead wire anti-dancing discharge device, which comprises a protective cover, a first outer edge and a second outer edge; wherein the first outer edge and the second outer edge are arranged on the protective cover, the first outer edge is adapted to be buckled with the second outer edge, and when the first outer edge is buckled with the second outer edge, a wire-passing space with a circular cross section is formed inside the protective cover, and the first outer edge and the second outer edge extend spirally along the length direction of the wire-passing space. The overhead wire anti-dancing discharge device can suppress the dancing of the wire.

Description

Technical Field

[0001] The invention relates to the field of high-voltage power transmission, and in particular to an overhead conductor anti-dancing discharge device. Background Art

[0002] With the rapid development of my country's economy, the demand for electricity is also increasing, and electric energy has become a necessity for the country's economic development. Power plants and power load centers are usually located in different regions. Power plants are built near primary energy sources such as hydropower and coal. Through power transmission, electric energy can be transmitted to load centers far away from power plants, allowing the development and utilization of electric energy to transcend geographical limitations. Overhead line transmission is the most commonly used transmission method.

[0003] Due to the characteristics of the transmission lines themselves, they are very sensitive to wind load excitation. Especially when the wires are covered with ice, since the wires form a uniform ice profile, strong winds will generate lifting and dragging forces on the ice-covered wires, causing the wires to exhibit a low-frequency, large-amplitude vertical elliptical motion, i.e. dancing. Wire dancing can cause serious wear of wires and hardware, and even lead to wire breakage and tower collapse accidents. At the same time, dancing can cause the wires to be discharged due to insufficient air safety distance from other charged bodies, thereby causing power transmission tripping, which has serious consequences for power transmission safety.

[0004] Therefore, there is a need for an overhead wire anti-dancing discharge device that can prevent the transmission wire from dancing and prevent the wire from discharging. Summary of the invention

[0005] The object of the present invention is to provide an overhead wire anti-dancing discharge device, which can suppress the dancing of the wire and prevent the wire from discharging.

[0006] In order to achieve the above object, according to one aspect of the present invention, there is provided an overhead wire anti-dancing discharge device, the overhead wire anti-dancing discharge device comprising: a protective cover, a first outer edge and a second outer edge;

[0007] Among them, the first outer edge and the second outer edge are arranged on the protective cover, and the first outer edge is adapted to be buckled on the second outer edge. When the first outer edge is buckled on the second outer edge, a wire passing space with a circular cross-section is formed on the inner side of the protective cover, and the first outer edge and the second outer edge extend spirally along the length direction of the wire passing space.

[0008] Preferably, the diameter of the cross section of the line passing space is adapted to the diameter of the power transmission line.

[0009] Preferably, the height of the first outer edge is 0.5-1 times the outer diameter of the cross section of the protective sleeve.

[0010] Preferably, it further comprises: an insulating bolt, wherein the insulating bolt passes through the first outer edge and the second outer edge.

[0011] Preferably, the insulating bolt is made of epoxy resin material.

[0012] Preferably, the protective cover, the first outer edge and the second outer edge are an integrally formed structure.

[0013] Preferably, the protective cover, the first outer edge and the second outer edge are made of silicone rubber.

[0014] Beneficial effects: The overhead wire anti-dancing discharge device provided by the present application has a first outer edge and a second outer edge that can extend along the length direction of the transmission wire, which can effectively prevent the transmission wire from producing a uniform icing profile. The spiral structure changes the aerodynamic characteristics of the span wire, so that the aerodynamic forces on different cross-sections of the transmission wire offset and interfere with each other, thereby effectively preventing and alleviating the dancing of the wire. The protective cover can effectively improve the insulation strength between the wire and other charged bodies, and prevent discharge caused by insufficient air gap between the wire and other charged bodies. The protective cover is made of silicone rubber material, which ensures the insulation effect while making the device lighter and easier to install, while reducing the additional load on the wire due to the deadweight of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the overhead conductor anti-dancing discharge device of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the connection between the overhead wire anti-dancing discharge device of the present invention and the transmission wire.

[0017] Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle.

[0018] Figure 4 It is a cross-sectional view of the overhead conductor anti-dancing discharge device of the present invention in use.

[0019] Figure 5 It is a schematic diagram of the use status of the overhead conductor anti-dancing discharge device of the present invention.

[0020] Description of reference numerals:

[0021] 1. Protective cover; 2. First outer edge; 3. Second outer edge; 4. Insulating bolts; 5. Transmission wire. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0023] According to one aspect of the present invention, there is provided an overhead conductor anti-dancing discharge device, the overhead conductor anti-dancing discharge device comprising: a protective cover, a first outer edge and a second outer edge;

[0024] Among them, the first outer edge and the second outer edge are arranged on the protective cover, and the first outer edge is adapted to be buckled on the second outer edge. When the first outer edge is buckled on the second outer edge, a wire passing space with a circular cross-section is formed on the inner side of the protective cover, and the first outer edge and the second outer edge extend spirally along the length direction of the wire passing space.

[0025] The overhead wire anti-dancing discharge device provided by the present invention, during use, the first outer edge is buckled with the second outer edge, so that the protective sleeve is arranged on the transmission wire, and the transmission wire passes through the line space, so that the first outer edge and the second outer edge after buckling are spirally extended along the length direction of the transmission wire. The protective sleeve can prevent the transmission wire from discharging to other charged bodies, and at the same time, the first outer edge and the second outer edge on the protective sleeve are spirally extended along the length direction of the transmission wire to form a spoiler section. After the overhead wire anti-dancing discharge device is installed on the wire, the spiral spoiler section on the protective sleeve causes the wind-receiving cross-section of the wire to continuously change along the length direction. Under the condition that the wire is covered with ice, the spiral spoiler section prevents the transmission wire from producing a uniform icing profile throughout the span length. Therefore, the spiral spoiler section changes the aerodynamic characteristics of the span wire, so that the aerodynamic forces on different cross-sections offset and interfere with each other, thereby effectively preventing and alleviating the dancing of the wire.

[0026] Specifically, by buckling the first outer edge with the second outer edge, the installation of the overhead wire anti-dancing discharge device is facilitated, and an opening is formed on the interface between the first outer edge and the second outer edge. The opening is L-shaped in the cross section of the device, which ensures the sealing of the first outer edge and the second outer edge, and at the same time can prevent the transmission line from discharging with other charged bodies through the opening between the first outer edge and the second outer edge.

[0027] Specifically, the protective cover can be adjusted according to the voltage level of the transmission line and the distance between the surrounding live objects. If the voltage level of the transmission line is higher, the protective cover is thicker; if the distance between the transmission line and the surrounding live objects is smaller, the protective cover is thicker.

[0028] Specifically, the overhead wire anti-dancing discharge device of the present invention is installed at the antinodes of different dancing orders of the wire. For example, when the wire has first-order dancing, the overhead wire anti-dancing discharge device is installed in the middle of the wire span; when the wire has second-order dancing, the overhead wire anti-dancing discharge device is installed at 1 / 4 and 3 / 4 of the wire span, thereby effectively suppressing the line dancing. The positions of the overhead wire anti-dancing discharge device are corresponding to those of the short-distance wires with different potentials to prevent air breakdown discharge between the wires. For wires and other charged bodies, it is also recommended to install the overhead wire anti-dancing discharge device at locations where the spacing is small and discharge is easily induced. In order to achieve a better anti-dancing effect, it is recommended that the coverage rate of the overhead wire anti-dancing discharge device on the wire be higher than 10%.

[0029] As a preferred solution, the diameter of the cross section of the line passing space is adapted to the diameter of the power transmission line.

[0030] In this technical solution, a relationship between the cross-section of the line passing space and the diameter of the transmission wire is further provided to facilitate the transmission wire to pass through the line passing space.

[0031] Specifically, the cross section in the line passing space with a circular cross section refers to the plane perpendicular to the length direction of the line passing space. When the overhead conductor anti-dancing discharge device is not bent, the line passing space is cylindrical, and the cross section is the radial direction of the cylinder.

[0032] As a preferred solution, the height of the first outer edge is 0.5-1 times the outer diameter of the cross section of the protective sleeve.

[0033] In this technical solution, the setting height of the spoiler section is further provided. By selecting 0.5-1 times, the spoiler effect of the spoiler section is improved, thereby improving the anti-dancing effect of the overhead wire anti-dancing discharge device. At the same time, the width of the spoiler section should increase accordingly as the height of the spoiler section increases to improve the strength of the spoiler section.

[0034] As a preferred solution, it also includes: an insulating bolt, which passes through the first outer edge and the second outer edge.

[0035] In this technical solution, the insulating bolts are provided to make the connection between the first outer edge and the second outer edge more reliable, thereby avoiding the first outer edge and the second outer edge from being separated, and ensuring the reliability of the use of the overhead conductor anti-dancing discharge device.

[0036] As a preferred solution, the insulating bolt is made of epoxy resin material.

[0037] In this technical solution, the material selection of the insulating bolts is further provided. The insulating bolts are made of epoxy resin material, which ensures the insulation effect and prevents the insulating bolts from having a corona phenomenon.

[0038] As a preferred solution, the protective cover, the first outer edge and the second outer edge are an integrally formed structure.

[0039] In this technical solution, the protective cover, the first outer edge and the second outer edge are an integrated structure, which improves the mechanical strength of the overhead conductor anti-dancing discharge device.

[0040] As a preferred solution, the protective cover, the first outer edge and the second outer edge are made of silicone rubber.

[0041] Specifically, through the selection of silicone rubber materials, the overhead wire anti-dancing discharge device can be resistant to aging, corrosion and high temperature, and has good insulation and corona resistance. At the same time, silicone rubber materials are solid dielectrics, and their electrical strength is much higher than that of air, which can effectively prevent discharge caused by insufficient air gap between the wire and other charged bodies. Silicone rubber materials make the device lighter and easier to install, while reducing the additional load on the wire due to the weight of the device.

[0042] Example 1

[0043] Figure 1 It is a structural schematic diagram of the overhead conductor anti-dancing discharge device of the present invention. Figure 2 It is a structural schematic diagram of the connection between the overhead wire anti-dancing discharge device of the present invention and the transmission wire. Figure 3 for Figure 2 A local enlarged schematic diagram of point A in the middle. Figure 4 It is a cross-sectional view of the overhead conductor anti-dancing discharge device of the present invention in use. Figure 5 It is a schematic diagram of the use status of the overhead conductor anti-dancing discharge device of the present invention.

[0044] like Figures 1 to 3 As shown, the overhead conductor anti-dancing discharge device comprises: a protective cover 1, a first outer edge 2 and a second outer edge 3;

[0045] The first outer edge 2 and the second outer edge 3 are arranged on the protective cover 1, and the first outer edge 2 is adapted to be buckled on the second outer edge 3. When the first outer edge 2 is buckled on the second outer edge 3, a wire-passing space with a circular cross section is formed inside the protective cover 1, and the first outer edge 2 and the second outer edge 3 extend spirally along the length direction of the wire-passing space;

[0046] Wherein, the diameter of the cross section of the wire passing space is adapted to the diameter of the power transmission wire 5;

[0047] The height of the first outer edge 2 and the second outer edge 3 is 0.5-1 times the outer diameter of the cross section of the protective sleeve 1;

[0048] The invention also includes: an insulating bolt 4, wherein the insulating bolt 4 passes through the first outer edge 2 and the second outer edge 3;

[0049] Wherein, the insulating bolt 4 is made of epoxy resin material;

[0050] Wherein, the protective cover 1, the first outer edge 2 and the second outer edge 3 are an integrally formed structure;

[0051] Wherein, the protective cover 1, the first outer edge 2 and the second outer edge 3 are made of silicone rubber.

[0052] In the overhead conductor anti-dancing discharge device of this embodiment, the first outer edge 2 is buckled with the second outer edge 3, so that the protective cover 1 is sleeved on the transmission conductor 5, and the transmission conductor 5 passes through the line space, so that the first outer edge 2 and the second outer edge 3 after buckling are spirally extended along the length direction of the transmission conductor 5 to form a spoiler section. After the overhead conductor anti-dancing discharge device is installed on the transmission conductor 5, the spiral spoiler section on the protective cover 1 causes the wind-receiving cross-section of the transmission conductor 5 along the length direction to continuously change. When the transmission conductor 5 is covered with ice, the spiral spoiler section prevents the transmission conductor 5 from producing a uniform icing profile throughout the entire span length. Therefore, the spiral spoiler section changes the aerodynamic characteristics of the transmission conductor 5 of the span, so that the aerodynamic forces on different cross-sections offset and interfere with each other, thereby effectively preventing and alleviating the dancing of the conductor.

[0053] The protective cover 1 can effectively improve the insulation strength between the transmission wire 5 and other charged bodies, and prevent the discharge phenomenon caused by insufficient air gap between the transmission wire 5 and other charged bodies. The protective cover 1 is made of silicone rubber material, which ensures the insulation effect while making the device lighter and easier to install, and reduces the additional load on the transmission wire 5 due to the deadweight of the device. The protective cover 1, the first outer edge 2 and the second outer edge 3 are an integrated structure, which improves the mechanical strength of the overhead wire anti-dancing discharge device.

[0054] By fastening the first outer edge 2 to the second outer edge 3, the installation of the overhead wire anti-dancing discharge device is facilitated. An opening is formed at the interface between the first outer edge 2 and the second outer edge 3. The opening is L-shaped in the cross section of the device, which ensures the sealing of the first outer edge 2 and the second outer edge 3, and can prevent the transmission line 5 from discharging with other charged bodies through the opening between the first outer edge 2 and the second outer edge 4. The provision of the insulating bolt 4 makes the connection between the first outer edge 2 and the second outer edge 3 more reliable, avoids the separation of the first outer edge 2 and the second outer edge 3, and ensures the reliability of the use of the overhead wire anti-dancing discharge device.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An overhead conductor anti-dancing discharge device, characterized in that: The overhead conductor anti-dancing discharge device comprises: a protective cover, a first outer edge and a second outer edge; Wherein, the first outer edge and the second outer edge are arranged on the protective cover, the first outer edge is adapted to be buckled with the second outer edge, and when the first outer edge is buckled with the second outer edge, a wire-passing space with a circular cross section is formed inside the protective cover, and the first outer edge and the second outer edge extend spirally along the length direction of the wire-passing space; The first outer edge and the second outer edge form an opening at the interface thereof, and the opening is L-shaped in the cross section of the device; The height of the first outer edge is 0.5-1 times of the outer diameter of the cross section of the protective sleeve.

2. The overhead conductor anti-dancing discharge device according to claim 1, characterized in that: The diameter of the cross section of the line passing space is adapted to the diameter of the power transmission line.

3. The overhead conductor anti-dancing discharge device according to claim 1, characterized in that: Also includes: An insulating bolt passes through the first outer edge and the second outer edge.

4. The overhead conductor anti-dancing discharge device according to claim 3, characterized in that: The insulating bolt is made of epoxy resin material.

5. The overhead conductor anti-dancing discharge device according to claim 1, characterized in that: The protective cover, the first outer edge and the second outer edge are an integrally formed structure.

6. The overhead conductor anti-dancing discharge device according to claim 1, characterized in that: The protective cover, the first outer edge and the second outer edge are made of silicone rubber.

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