Wind power plant current collection line lightning arrester

Abstract

The wind power plant current collection line lightning arrester comprises a connecting frame, a lightning rod is arranged at the top end of the connecting frame, two sets of lightning protection mechanisms are installed at the bottom of the connecting frame, the lightning protection mechanisms penetrate through the connecting frame, lightning detection assemblies are connected to the lightning protection mechanisms, each lightning protection mechanism comprises an insulating rod core, and a protruding installation head is arranged at the top end of each insulating rod core. According to the utility model, the two groups of lightning protection mechanisms and the lightning rod are combined through the connecting frame, good lightning protection and lightning protection effects are achieved, the voltage limiting elements and the insulators in the lightning protection mechanisms are connected at intervals through the voltage equalizing rings, and the voltage limiting elements and the insulators are connected at intervals through the voltage equalizing rings. The functions of the insulator and the lightning arrester are integrated, the lightning protection effect is improved, the connecting seat arranged at the bottom of the lightning protection mechanism can be quickly connected with the connecting rod head in the lightning protection mechanism, the wire clamp arranged on the connecting seat can be quickly connected with a current collection circuit, and the lightning protection effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection for wind power stations, in particular to a lightning protection device for a wind power station collector line. Background Art

[0002] Wind energy is a clean, pollution-free renewable energy source with huge wind energy reserves, so it is increasingly valued by countries around the world. my country's land wind farm collection lines are often built in high altitude, high soil resistivity, and high wind speed environments, with frequent lightning activities and are extremely susceptible to lightning strikes. When the line is struck by lightning, the lightning current may cause ground potential counter-attack and lightning overvoltage when it enters the ground along the tower, which will not only damage the line itself, but also transmit the intrusion wave overvoltage generated along the line to the wind turbine, threatening the safe, stable and reliable operation of the wind turbine high-voltage equipment and its auxiliary facilities.

[0003] Both theoretical analysis and operational experience have shown that line arresters can achieve 100% protection against lightning flashovers in protected line segments, and are the most effective lightning protection measure. At present, most conventional arresters are used for protection, which need to be installed in parallel with insulators or other protective equipment, which not only increases the complexity of the line, but also increases the risk of line tripping due to shortened lifespan caused by lightning strikes or aging of equipment.

[0004] Therefore, in view of the shortcomings of the prior art, it is necessary to provide a wind farm collector line lightning protection device to solve the shortcomings of the prior art. Utility Model Content

[0005] The purpose of the utility model is to avoid the shortcomings of the prior art and provide a lightning protection device for a wind farm collector line. Two groups of lightning protection mechanisms and lightning rods are combined through a connecting frame to play a good lightning protection and lightning arresting role. At the same time, the voltage limiting element and the insulator in the lightning protection mechanism are spaced and connected through a voltage equalizing ring, and the functions of the insulator and the lightning arrester are integrated to improve the lightning protection effect. The connecting seat arranged at the bottom of the lightning protection mechanism can be quickly connected to the connecting rod head in the lightning protection mechanism, and the wire clamp arranged on the connecting seat can be quickly connected to the collector line to improve the lightning protection effect.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical means.

[0007] Provided is a lightning protection device for a wind farm collector line, comprising a connecting frame, a lightning rod is arranged on the top of the connecting frame, two sets of lightning protection mechanisms are installed at the bottom of the connecting frame, the lightning protection mechanisms penetrate the connecting frame, and a lightning detection component is connected to the lightning protection mechanisms;

[0008] The lightning protection mechanism includes an insulating rod core, a raised mounting head is provided at the top of the insulating rod core, the mounting head passes through the connecting frame, a first voltage limiting element is provided on the insulating rod core, a first voltage equalizing ring is installed below the first voltage limiting element, a second voltage equalizing ring is provided below the first voltage equalizing ring, a ceramic insulating string is provided between the first voltage equalizing ring and the second voltage equalizing ring, a second voltage limiting element is provided at the bottom of the second voltage limiting ring, a connecting rod head is provided below the second voltage limiting element, and a connecting seat is installed at the bottom of the connecting rod head.

[0009] Specifically, an annular electrode is disposed at the top end of the first voltage limiting element and the bottom end of the second voltage limiting element, and the annular electrode is sleeved on the outside of the insulating rod core.

[0010] Specifically, a clamping groove is arranged on the connecting seat, the clamping groove is installed in cooperation with the connecting rod head, and a wire clamp is arranged at the bottom of the connecting seat.

[0011] Specifically, two groups of through holes are opened at the top of the connecting frame, and the insulating rod core is passed through the through holes. The diameter of the protruding mounting head connected to the top of the insulating rod core is larger than the diameter of the through holes.

[0012] Specifically, the lightning detection components are respectively connected to the top of the two groups of lightning protection mechanisms and the lightning rod.

[0013] The utility model combines two groups of lightning protection mechanisms and lightning rods through a connecting frame, thereby playing a good role in lightning protection and lightning arresting. At the same time, the voltage limiting element and the insulator in the lightning protection mechanism are connected at intervals through a voltage equalizing ring, the functions of the insulator and the lightning arrester are integrated, and the lightning protection effect is improved. The connecting seat arranged at the bottom of the lightning protection mechanism can be quickly connected to the connecting rod head in the lightning protection mechanism, and the wire clamp arranged on the connecting seat can be quickly connected to the collector line, thereby improving the lightning protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described with reference to the accompanying drawings, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0015] Figure 1 The utility model is a front view of a lightning protection device for a wind farm collector line.

[0016] Figure 2 The utility model is a structural schematic diagram of a lightning protection mechanism in a lightning protection device for a wind farm collector line.

[0017] from Figure 1 to Figure 2 Including:

[0018] 1. Connecting frame;

[0019] 2. Lightning rod;

[0020] 3. Lightning protection mechanism;

[0021] 4. Lightning detection components;

[0022] 5. Insulation rod core;

[0023] 6. Raised mounting head;

[0024] 7. A first pressure limiting element;

[0025] 8. The first pressure equalizing ring;

[0026] 9. Second pressure equalizing ring;

[0027] 10. Ceramic insulation string;

[0028] 11. A second voltage limiting element;

[0029] 12. Connect the rod head;

[0030] 13. Connecting seat;

[0031] 14. Ring electrode;

[0032] 15. Through hole;

[0033] 16. Card slot;

[0034] 17. Wire clamp. DETAILED DESCRIPTION

[0035] The utility model is further described in conjunction with the following embodiments.

[0036] Example 1.

[0037] like Figure 1-2 As shown, a lightning protection device for a wind farm collector line includes a connecting frame 1, a lightning rod 2 is arranged on the top of the connecting frame 1, two groups of lightning protection mechanisms 3 are installed at the bottom of the connecting frame 1, the lightning protection mechanisms 3 penetrate the connecting frame 1, and a lightning detection component 4 is connected to the lightning protection mechanisms 3.

[0038] When connecting and using, the lightning rod 2 is connected to the two sets of lightning protection mechanisms 3 by installing the connecting frame 1, and the lightning detection components 4 are used to detect them respectively. The lightning rod 2 and the lightning protection mechanism 3 are used in combination to improve the lightning protection and lightning arresting effect.

[0039] The lightning protection mechanism 3 includes an insulating rod core 5, a raised mounting head 6 is provided at the top of the insulating rod core 5, the mounting head passes through the connecting frame 1, a first voltage limiting element 7 is provided on the insulating rod core 5, a first voltage equalizing ring 8 is installed below the first voltage limiting element 7, a second voltage equalizing ring 9 is provided below the first voltage equalizing ring 8, a ceramic insulating string 10 is provided between the first voltage equalizing ring 8 and the second voltage equalizing ring 9, a second voltage limiting element 11 is provided at the bottom of the second voltage limiting ring 9, a connecting rod head 12 is provided below the second voltage limiting element 11, and a connecting seat 13 is installed at the bottom of the connecting rod head 12.

[0040] The two groups of voltage-limiting elements arranged in the lightning protection mechanism 3 can instantly increase the resistance when lightning strikes. At the same time, the first voltage-limiting ring 8 and the second voltage-limiting ring 9 installed at the bottom of the first voltage-limiting element 7 and the top of the second voltage-limiting element 11 can effectively prevent the generation of side lightning strikes, and can evenly distribute the high voltage around the object to ensure that there is no potential difference between the various parts of the ring, thereby achieving the effect of voltage balancing. The ceramic insulating conductor installed between the first voltage-limiting ring 8 and the second voltage-limiting ring 9 can limit the lightning overvoltage, so that the current passing through is suppressed to a lower value, and finally guided by the connecting rod head 12 to the connecting seat 13 installed at the bottom.

[0041] An annular electrode 14 is provided at the top of the first voltage limiting element 7 and the bottom of the second voltage limiting element 11. The annular electrode 14 is sleeved on the outside of the insulating rod core 5. The annular electrodes 14 installed at both ends can adjust the arc position to a certain extent when struck by lightning to achieve controllable arc position and prevent arcs from being generated at other positions.

[0042] A snap-in groove 16 is provided on the connecting seat 13, and the snap-in groove 16 is installed in cooperation with the connecting rod head 12, and a wire clamp 17 is provided at the bottom of the connecting seat 13. The setting of the snap-in groove 16 facilitates the connection between the connecting seat 13 and the connecting rod head 12, thereby improving the installation efficiency and stability. The wire clamp 17 provided at the bottom of the connecting seat 13 can facilitate the lightning protection mechanism 3 on the connecting seat 13 to be quickly connected to the integrated circuit.

[0043] Two groups of through holes 15 are opened at the top of the connecting frame 1, and the insulating rod core 5 passes through the through holes 15. The diameter of the raised mounting head 6 connected to the top of the insulating rod core 5 is larger than the diameter of the through holes 15. The insulating rod core 5 and the overall lightning protection device are connected and installed with the connecting frame 1 through the mounting head passing through the through holes 15.

[0044] The lightning detection component 4 is connected to the top of the two groups of lightning protection mechanisms 3 and the lightning rod 2 respectively. The lightning detection component 4 can perform real-time detection on the lightning protection mechanisms 3 and the lightning rod 2 to improve the safety of lightning protection.

[0045] During the production process, the two groups of lightning protection mechanisms 3 and the lightning rod 2 are combined through the connecting frame 1, which plays a good role in lightning protection. At the same time, the voltage limiting element and the insulator in the lightning protection mechanism 3 are connected at intervals through the equalizing ring, and the functions of the insulator and the lightning arrester are integrated to improve the lightning protection effect. The connecting seat 13 arranged at the bottom of the lightning protection mechanism 3 can be quickly connected to the connecting rod head 12 in the lightning protection mechanism 3, and the wire clamp 17 arranged on the connecting seat 13 can be quickly connected to the collector line to improve the lightning protection effect.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the protection scope of the utility model. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A lightning protection device for wind farm collector lines, characterized by: It comprises a connecting frame, a lightning rod is arranged on the top of the connecting frame, two sets of lightning protection mechanisms are installed on the bottom of the connecting frame, the lightning protection mechanisms penetrate the connecting frame, and a lightning detection component is connected to the lightning protection mechanisms; The lightning protection mechanism includes an insulating rod core, a raised mounting head is provided at the top of the insulating rod core, the mounting head passes through the connecting frame, a first voltage limiting element is provided on the insulating rod core, a first voltage equalizing ring is installed below the first voltage limiting element, a second voltage equalizing ring is provided below the first voltage equalizing ring, a ceramic insulating string is provided between the first voltage equalizing ring and the second voltage equalizing ring, a second voltage limiting element is provided at the bottom of the second voltage limiting ring, a connecting rod head is provided below the second voltage limiting element, and a connecting seat is installed at the bottom of the connecting rod head.

2. A lightning protection device for wind farm collector lines according to claim 1, characterized in that: An annular electrode is disposed at the top end of the first voltage-limiting element and the bottom end of the second voltage-limiting element. The annular electrode is sleeved on the outside of the insulating rod core.

3. A lightning protection device for wind farm collector lines according to claim 2, characterized in that: The connecting seat is provided with a clamping groove, the clamping groove is installed in cooperation with the connecting rod head, and a wire clamp is provided at the bottom of the connecting seat.

4. A lightning protection device for wind farm collector lines according to claim 3, characterized in that: Two groups of through holes are provided at the top of the connecting frame, and the insulating rod core is passed through the through holes. The diameter of the protruding mounting head connected to the top of the insulating rod core is larger than the diameter of the through holes.

5. A lightning protection device for wind farm collector lines according to claim 4, characterized in that: The lightning detection components are respectively connected to the tops of the two groups of lightning protection mechanisms and the lightning rods.

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