CN201125843Y

CN201125843Y - Wind turbine lightning protection system

Info

Publication number: CN201125843Y
Application number: CNU200720061832XU
Authority: CN
Inventors: 李翔
Original assignee: GUANGDONG MINGYANG WIND ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: GUANGDONG MINGYANG WIND ELECTRICAL TECHNOLOGY Co Ltd
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2008-10-01
Anticipated expiration: 2017-12-21

Abstract

The utility model discloses a lightning protection system for a wind power generating set, which relates to a tower, a generator cabin is arranged on the upper end of the tower, a frame is arranged in the cabin, and a generator is arranged on the frame. The generator is connected with the gear box through a high-speed coupling, and the gear box is connected with the hub provided with the blades through the main shaft, and it is characterized in that: lightning receptors and lightning receptors are arranged inside the blades and on the cabin. The conductor device is provided with a discharge device on the hub, the main shaft, the gear box, the frame and the tower, the lightning receptor and the conductor device are electrically connected to the discharge device, and the discharge device is connected to the underground The grounding device is electrically connected. The purpose of this utility model is to overcome the harm caused by the huge current and voltage caused by lightning strikes to wind power generators, especially the 1.5MW variable speed constant frequency double-fed asynchronous wind power generators, and to provide an effective way to avoid lightning strikes on wind power generators. Lightning protection system against incoming damage.

Description

Lightning protection system for wind generator set

Technical field

The utility model relates to a kind of lightning protection protective system that is applicable to wind power generating set.

Background technique

Wind-power electricity generation is as a kind of energy industry of environmental protection, in modern energy-intensive society, more and more come into one's own, investment to wind-driven generator is also increasing, and well-known, wind power generating set generally is installed in the field spacious ground district, because it is generally high building, so as easy as rolling off a log the thunderbolt, particularly in high lightning region, thunder and lightning is more serious to the harm of wind power generating set.And the existing lightning-protection system that is used for wind-driven generator is difficult to eliminate the influence of its powerful electric current of thunder and lightning to each parts of wind power generating set; tend to cause great loss; particularly for 1.5MW variable speed constant frequency dual-feed asynchronous wind power generator group; because it is provided with many have accurate machinery and electrical equipments; that loss is huge if be struck by lightning, and every profession and trade does not have reasonable manner for the lightning protection of the double-fed asynchronous generator of 1.5MW at present.So existing lightning protection system for wind generator set awaits further improvement.

The model utility content

The purpose of this utility model be for overcome its moment of thunderbolt huge electric current and voltage to wind power generating set; the particularly harm that brings of 1.5MW variable speed constant frequency dual-feed asynchronous wind power generator group provides a kind of lightning protection protective system of the infringement that wind-driven generator is brought of effectively avoiding being struck by lightning.

To achieve the above object, the utility model adopts following scheme:

A kind of wind power generating set lightning-protection system, include a pylon, be provided with the generator cabin in the upper end of pylon, be provided with frame in described cabin, on frame, be provided with generator, described generator is connected with gear-box by the high speed shaft joint, described gear-box is connected with the wheel hub that is provided with blade by main shaft, it is characterized in that: on described blade interior and cabin, be provided with thunder and lightning acceptor and conductor means, at described wheel hub, main shaft, gear-box, frame and pylon are provided with electric discharge device, described thunder and lightning acceptor and conductor means are electrically connected with electric discharge device, described electric discharge device be arranged on underground earthed system and be electrically connected.

Aforesaid wind power generating set lightning-protection system is characterized in that described blade, wheel hub, main shaft, frame and pylon are electrically connected successively.

Aforesaid wind power generating set lightning-protection system is characterized in that thunder and lightning acceptor and the conductor means on the cabin is located on the meteorological mast, and is electrically connected with electric discharge device in frame and the pylon.

Aforesaid wind power generating set lightning-protection system is characterized in that described blade, wheel hub, main shaft, gear-box, frame and pylon are electrically connected successively.

Aforesaid wind power generating set lightning-protection system is characterized in that being provided with mask net on its outer cover of cabin, and described mask net top is provided with a dismountable mask net piece, and described mask net is connected with earthed system by electric discharge device.

Aforesaid wind power generating set lightning-protection system is characterized in that described electric discharge device is the copper braid.

Aforesaid wind power generating set lightning-protection system is characterized in that described electric discharge device is the ground connection copper brush.

Aforesaid wind power generating set lightning-protection system is characterized in that described electric discharge device is an earth cable.

The beneficial effects of the utility model: be provided with thunder and lightning acceptor and electric installation in its blade interior of wind power generating set and nacelle top, on its outer cover of cabin, be provided with mask net, and each parts that is arranged in the cabin all are connected with earthed system by electric discharge device, effectively the powerful conduction of current that thunderbolt is produced arrives the earth, eliminate the influence of thunder and lightning, guaranteed the safety of generator system each parts of wind power generating set.

Description of drawings

Fig. 1 is a schematic representation of the present utility model;

Fig. 2 is the schematic representation of mask net in the utility model.

Embodiment

Below in conjunction with description of drawings and embodiment the utility model is further described:

A kind of wind power generating set lightning-protection system as shown in Figure 1, include a pylon 1, be provided with generator cabin 2 in the upper end of pylon 1, be provided with frame 3 in described cabin 2, on frame 3, be provided with generator 4, described generator 4 is connected with gear-box 6 by high speed shaft joint 5, described gear-box 6 is connected with the wheel hub 9 that is provided with blade 8 by main shaft 7, it is characterized in that: on described blade 8 inside and cabin 2, be provided with thunder and lightning acceptor and conductor means, at described wheel hub 9, main shaft 7, gear-box 6, frame 3 and pylon 1 are provided with electric discharge device 10, described thunder and lightning acceptor and conductor means are electrically connected with electric discharge device 10, described electric discharge device 10 be arranged on underground earthed system 11 and be electrically connected.

Blade 8 described in the utility model, wheel hub 9, main shaft 7, frame 3 and pylon 1 are electrically connected successively, and the main lightning current conducting path that directly hits blade 8 is: blade 8-wheel hub 9-main shaft 7-frame 3-tower tube 1-earthed system 11.

Wherein thunder and lightning acceptor on the cabin 2 and conductor means are located on the meteorological mast 12, and thunder and lightning acceptor in the meteorological mast 12 and conductor means are electrically connected with electric discharge device 10 in frame 3 and the pylon 1.The lightning current conducting path that directly hits meteorological mast is: meteorological mast 12-frame 3-tower tube 1-earthed system 11.

Wherein the utility model is provided with mask net 13 on 2 its outer covers of cabin, and described mask net 13 tops are provided with a dismountable mask net piece 14, and described mask net 13 is connected with earthed system 11 by electric discharge device 10.Electric discharge device 6 described in the utility model is one or more in copper braid, ground connection copper brush, the earth cable.

In Fig. 1, between its fan blade 8 of 1.5MW dual-feed asynchronous wind power generator group and wheel hub 9, be connected with the copper braid.Ground connection copper brush and copper braid are installed between the spindle lock plate edge of main shaft 8 front ends and frame 3.Driftage Bearing Installation ground connection copper brush and copper braid between driftage brake disc and the tower tube 1.Use 240mm between generator 4 its stator groundings, frame 3, tower tube 1 its foundation ring and the ground networks ²Cable connects.Between meteorological mast 12, generator 4 its rotor ground faults, gear-box 6 and frame 3, use 75mm ²Yellowish green earth cable connects.Use 75mm between each layer tower tube 1 flange junction surface ²Yellowish green earth cable connects.

The lightning current that directly hits blade 8 or meteorological mast 12 can be imported earthed system safely by above-mentioned Placement in the utility model.Can avoid blade bearing, main shaft bearing and driftage bearing by this conducting path lightning current, avoid it is caused damage.

Claims

1. A lightning protection system for a wind power generating set, which involves a tower (1), a generator cabin (2) is arranged on the upper end of the tower (1), and a frame (3) is arranged on the cabin (2) ), the frame (3) is provided with a generator (4), and the generator (4) is connected with the gear box (6) through a high-speed coupling (5), and the gear box (6) The main shaft (7) is connected with the hub (9) provided with blades (8), and it is characterized in that: a lightning receptor and a conductor device are arranged inside the blade (8) and on the nacelle (2). The hub (9), the main shaft (7), the gear box (6), the frame (3) and the tower (1) are provided with a discharge device (10), and the lightning receptor and the conductor device and the discharge device (10) Electrical connection, the discharge device (10) is electrically connected to the grounding device (11) arranged underground.

2. The lightning protection system for wind power generators according to claim 1, characterized in that the blades (8), the hub (9), the main shaft (7), the frame (3) and the tower (1) are sequentially electrically connect.

3. The lightning protection system for wind power generators according to claim 1, characterized in that the lightning receptor and conductor device on the nacelle (2) are arranged on the meteorological mast (12), and are connected with the frame (3) and the tower The discharge device (10) in (1) is electrically connected.

4. The lightning protection system for wind power generators according to claim 1, characterized in that the blades (8), the hub (9), the main shaft (7), the gearbox (6), the frame (3) and the tower The racks (1) are electrically connected in turn.

5. The lightning protection system for wind power generators according to claim 1, characterized in that a shielding net (13) is provided on the outer cover of the nacelle (2), and a detachable shielding net (13) is provided on the top of the shielding net (13). A network block (14), the shielding network (13) is connected to the grounding device (11) through the discharge device (10).

6. The lightning protection system for wind power generators according to claim 1, 3 or 5, characterized in that the discharge device (6) is a copper braid.

7. The lightning protection system for wind power generators according to claim 1, 3 or 5, characterized in that the discharge device (6) is a grounded copper brush.

8. The lightning protection system for wind power generators according to claim 1, 3 or 5, characterized in that the discharge device (6) is a grounding cable.