CN218849820U

CN218849820U - Lightning protection grounding device for preventing lightning current from counterattacking engine room generator along tower

Info

Publication number: CN218849820U
Application number: CN202222680960.XU
Authority: CN
Inventors: 张伟; 刘俏倩; 於莉莎; 林鸿辉; 杨雅绮; 许国东; 孙勇; 项峰
Original assignee: Zhejiang Windey Co Ltd
Current assignee: Zhejiang Windey Co Ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-04-11
Anticipated expiration: 2032-10-12

Abstract

The utility model provides an avoid lightning grounding device of lightning current along tower section of thick bamboo counterattack cabin generator. The lightning protection grounding device for preventing lightning current from striking the engine room generator along the tower barrel comprises a fan main frame, a generator rotor junction box, a generator stator junction box, a grounding bar A, a grounding bar B, a tower barrel, a grounding flat iron and a tower footing grounding busbar, wherein the generator rotor junction box and the generator stator junction box are fixedly installed on the generator, and are connected with each other through a grounding cable and the grounding bar A. The utility model provides an avoid lightning grounding device of lightning current along tower section of thick bamboo counterattack cabin generator has and adopts the ground connection row to link to each other generator stator and rotor ground connection, a tower section of thick bamboo and column foot segmentation, when guaranteeing lightning current safety leading-in ground, can effectively avoid the lightning current to counterattack the cabin generator along a tower section of thick bamboo wall, can guarantee the advantage of the reliable operation of generator.

Description

Lightning protection grounding device for preventing lightning current from counterattacking engine room generator along tower

Technical Field

The utility model relates to a lightning protection ground connection technical field especially relates to an avoid lightning current along a tower section of thick bamboo counterattack cabin generator's lightning protection earthing device.

Background

With the daily shortage of social energy, wind power generation is regarded as a renewable clean energy, and then the development is rapid. Because the wind generating set is mostly arranged in mountainous areas, plateaus, coastal areas and even deep sea areas with high thunder and lightning, more wind energy is collected for meeting the energy demand, the length of the fan blade and the height of a tower barrel are increased, and the probability of lightning stroke of the fan set is improved by the factors. A large amount of precise electrical and electronic equipment such as a generator, an engine room control cabinet, a gear box and the like are integrated in the fan engine room, and one-time lightning stroke can bring huge mechanical loss and economic loss. Therefore, the wind turbine must be equipped with a safe and reliable lightning protection system, in which the lightning current is allowed to flow into the ground along a correct discharge path, and the lightning current is prevented from entering the nacelle along the tower wall in a reverse-series manner, which is important for causing damage to electrical equipment such as a generator.

Therefore, there is a need to provide a new lightning grounding device for preventing lightning current from flowing along the tower to back-strike the nacelle generator.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide an adopt ground connection row to link to each other generator stator and rotor ground connection, a tower section of thick bamboo and column foot segmentation, when guaranteeing the leading-in ground of lightning current safety, can effectively avoid the lightning current to strike back the cabin generator along a tower section of thick bamboo wall, can guarantee the lightning protection earthing device of avoiding the lightning current to strike back the cabin generator along a tower section of thick bamboo of the reliable operation of generator.

In order to solve the technical problem, the utility model provides an avoid lightning current to strike back the lightning grounding device of cabin generator along a tower section of thick bamboo includes: the wind driven generator comprises a fan main frame, a generator rotor junction box, a generator stator junction box, a grounding bar A, a grounding bar B, a tower drum, a grounding flat iron and a tower foundation grounding busbar, wherein the generator rotor junction box and the generator stator junction box are fixedly installed on the generator, the generator rotor junction box and the generator stator junction box are connected with the grounding bar A through a grounding cable, the grounding bar B is connected with the grounding flat iron through the grounding cable, the grounding flat iron is connected with the outer wall of the tower drum, and the outer wall of the tower drum and the total equipotential connection point of the tower foundation grounding busbar are connected.

Preferably, the stator and the rotor of the generator are grounded through a grounding bar on a rear frame of the nacelle and connected with the outer wall of the tower.

Preferably, the grounding bar A and the grounding bar B are installed on a rear machine frame of a cabin of the generator, and the grounding flat iron is installed on a saddle of the outer wall of the tower barrel.

Preferably, the grounding bar A and the grounding bar B are made of stainless steel materials or copper bars.

Preferably, the grounding bar A and the grounding bar B are both provided with mounting holes, and the number of the mounting holes is the same as the number of the grounding cables of the generator stator or the generator rotor.

Compared with the prior art, the utility model provides an avoid lightning current to strike back the lightning grounding device of cabin generator along a tower section of thick bamboo has following beneficial effect:

the utility model provides an avoid lightning grounding device of lightning current along tower section of thick bamboo counterattack cabin generator adopts the ground connection row to link to each other generator stator and rotor ground connection, a tower section of thick bamboo and column foot segmentation, when guaranteeing lightning current safety import ground, can effectively avoid lightning current along tower section of thick bamboo wall counterattack cabin generator. The method and the assembly are reliable. The grounding bar is made of stainless steel or copper bars or other materials, so that poor contact caused by rusting of the contact surface can be prevented, and the maintenance cost is saved.

Drawings

Fig. 1 is a schematic structural diagram of a preferred embodiment of the lightning grounding device for preventing lightning current from striking a nacelle generator along a tower according to the present invention;

fig. 2 is a schematic view of the installation of the ground row a and the ground row B shown in fig. 1 on the main frame of the fan;

fig. 3 is a schematic front view of the ground bar a shown in fig. 1;

fig. 4 is a side view of the structure shown in fig. 3.

Reference numbers in the figures: 1. the wind turbine generator comprises a wind turbine main frame, 2, a generator, 3, a generator rotor junction box, 4, a generator stator junction box, 5, grounding bars A and 6, grounding bars B and 7, a tower barrel, 8, grounding flat irons, 9 and a tower footing grounding busbar.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural diagram of a preferred embodiment of a lightning grounding device for preventing lightning current from striking a nacelle generator along a tower according to the present invention; fig. 2 is a schematic view of the installation of the ground row a and the ground row B shown in fig. 1 on the main frame of the fan; fig. 3 is a schematic front view of the ground bar a shown in fig. 1; fig. 4 is a side view of the structure shown in fig. 3. The lightning protection earthing device who avoids lightning current to strike back cabin generator along a tower section of thick bamboo includes: the wind driven generator comprises a fan main frame 1, a generator 2, a generator rotor junction box 3, a generator stator junction box 4, a grounding bar A5, a grounding bar B6, a tower cylinder 7, a grounding flat iron 8 and a tower footing grounding busbar 9. The generator rotor junction box 3 and the generator stator junction box 4 of the generator 2 are connected through a grounding cable and a grounding bar A5, the grounding cable is led out through a grounding bar B6 to be connected with a grounding flat iron 8 at a saddle position on the outer wall of the tower drum 7, and finally the grounding cable is connected with a total equipotential connection point of a tower-based grounding busbar 9 through the outer wall of the tower drum 7.

Referring to fig. 1, the generator 2 is installed on a rear frame of a fan main frame 1, a generator rotor junction box 3 is installed on the left side of a slip ring chamber of the generator 2, and a generator stator junction box 3 is installed on the left side of the generator 2.

Referring to fig. 2, the ground bar A5 and the ground bar B6 are mounted on the rear frame of the fan main frame 1.

Referring to fig. 3 and 4, the types of the grounding bar A5 and the grounding bar B6 are the same, each grounding bar has 2 mounting holes, and the mounting mode can be single mounting hole, single fixing or double back-to-back fixing. The number of the mounting holes is selected according to the number of the stator and rotor grounding cables of the generator 2.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A lightning protection grounding device for avoiding lightning current to strike a nacelle generator along a tower, comprising:

the wind driven generator comprises a fan main frame, a generator rotor junction box, a generator stator junction box, a grounding bar A, a grounding bar B, a tower drum, a grounding flat iron and a tower foundation grounding busbar, wherein the generator rotor junction box and the generator stator junction box are fixedly installed on the generator, the generator rotor junction box and the generator stator junction box are connected with the grounding bar A through a grounding cable, the grounding bar B is connected with the grounding flat iron through the grounding cable, the grounding flat iron is connected with the outer wall of the tower drum, and the outer wall of the tower drum and the total equipotential connection point of the tower foundation grounding busbar are connected.

2. The lightning grounding device for avoiding lightning current from attacking a nacelle generator along a tower as claimed in claim 1, wherein the grounding of the stator and the rotor of the generator is connected with the outer wall of the tower through a grounding bar on a rear frame of the nacelle.

3. The lightning protection grounding device for avoiding lightning current from attacking a nacelle generator along a tower as claimed in claim 1, wherein the grounding bar A and the grounding bar B are installed on a rear frame of a nacelle of the generator, and the grounding flat iron is installed at a saddle of an outer wall of the tower.

4. The lightning protection grounding device for avoiding lightning current from attacking an engine room generator along a tower according to claim 1, wherein the grounding bar A and the grounding bar B are made of stainless steel or copper bars.

5. The lightning protection grounding device for avoiding lightning current from striking the nacelle generator along the tower as claimed in claim 1, wherein mounting holes are formed in the grounding bar A and the grounding bar B, and the number of the mounting holes is the same as the number of grounding cables of the generator stator or the generator rotor.