CN115842285A - Electrode lightning receiving device and electrode lightning receiving system - Google Patents

Abstract

The invention relates to an electrode lightning arrester and an electrode lightning arresting system, wherein the electrode lightning arrester comprises at least two electrodes; the two electrodes are arranged at intervals to form an electrode belt and are connected through a connecting piece; the electrode lightning receiving system comprises a blade tip lightning receiver, a blade assembly and at least two electrode lightning receiving devices; one end of the blade assembly is connected with the blade tip lightning receptor, the two electrode lightning receptors are respectively arranged on two opposite sides of the blade assembly, one end of the electrode belt is connected with the blade tip lightning receptor, and the other end of the electrode belt is connected with a lower guide body wire in the blade assembly; the electrode lightning receiving device is used for shielding the surface electric field of the blade assembly and inhibiting the surface discharge of the blade assembly; through setting up the electrode lightning arrester, play the shielding effect to the surface electric field of blade subassembly and inside lower guide body, restrain the surface discharge of blade subassembly, protected the most vulnerable position of suffering the thunderbolt and taking place the damage of blade subassembly, effectively reduce the impaired risk of the blade subassembly thunderbolt that the inefficacy leads to.

Description

Electrode lightning receiving device and electrode lightning receiving system

Technical Field

The invention relates to the technical field of wind generating sets, in particular to an electrode lightning receiving device and an electrode lightning receiving system.

Background

At present, wind power is developed rapidly as a clean energy under the national requirements of 'carbon peak and carbon neutralization'. In the future, wind power generation is developing toward large-scale, open-sea, and deep-sea. The onshore wind power plant is influenced by factors such as occupied area and the like, and the development is limited; offshore wind power has the characteristics of land resource saving, high electricity generation utilization hours and the like, and wind power generation is rapidly increased in recent years. The offshore wind power station single unit has higher installed capacity and long blade length. In order to ensure the mechanical stress of the blades, the blades of a single unit of the offshore wind farm are usually made of carbon fiber composite materials as main beams. The carbon fiber composite material is a conductor, has the same lightning receiving performance as a metal material in a lightning environment, generates head-on discharge under the action of a thundercloud and downlink pilot combined electric field, and intercepts downlink pilot, so that the lightning damage of a main beam material is caused. In addition, the offshore wind farm is used as an isolated ground structure, and no building exists around the offshore wind farm, so that the offshore wind farm is more vulnerable to lightning stroke damage. Statistics shows that the maintenance cost of the carbon fiber main beam blade in the offshore wind power plant is greatly increased after being damaged by lightning, the maintenance man-hour is remarkably increased, and the loss caused by lightning stroke and power failure is higher. Therefore, in order to ensure safe and stable operation of the offshore wind farm, the lightning protection lightning receiving system of the carbon fiber main beam blade of the wind generating set needs to be reasonably designed.

The structure of the carbon fiber main beam blade is similar to that of the traditional glass fiber main beam blade, and only the main beam is made of carbon fiber composite materials. According to the structure of the lightning protection lightning receiving system of the carbon fiber main girder blade given by the IEC61400-24 standard, the lightning protection lightning receiving system is required to comprise a metal blade tip, a surface metal net, a lower guide body in the blade and one or more pairs of lightning receptors in the Suction Surface (SS) and the Pressure Surface (PS) of the blade. However, due to the conductivity of the carbon fiber composite material, the lightning protection system cannot effectively protect the carbon fiber material. American researchers have counted the operational data of Kansas wind power station in nearly 5 years, find that the carbon fiber main beam blade installed with the lightning protection lightning receiving system still has higher lightning risk, and the damage that the lightning stroke leads to is more serious. After lightning strikes on the carbon fiber laminate or the carbon fiber main beam in the carbon fiber main beam blade, the carbon fiber main beam is broken within a range of several meters away from the blade tip, and the insulating shell of the blade is disintegrated at a position far away from the blade tip. In addition, statistics show that over 90% of lightning strike points are located within the span of the spar at a distance of 5m from the tip of the blade, similar to the distribution of lightning strike points along the blade of a conventional fiberglass spar blade. The reason for causing the above phenomenon is that under the thunder and lightning environment, the carbon fiber material generates head-on discharge, and competes with the existing lightning protection lightning receiving system to intercept the downlink thunder and lightning, so that the lightning stroke point is easier to be in the range of the carbon fiber girder. The primary lightning stroke comprises a lightning receiving process and a high-current process after the interception of the downlink lightning, and the two step ends are considered simultaneously in the design of the lightning protection lightning receiving system.

However, the lightning protection lightning receiving system design of the existing carbon fiber main beam blade is only analyzed from a high-current process, namely only the current capacity is considered. The structure of the lightning protection lightning receiving system does not consider the failure condition of the lightning protection lightning receiver, namely, the electric field shielding analysis is not carried out from the angle of an electric field; the carbon fiber main beam blade with the lightning environment competitive relationship is damaged by lightning.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an electrode lightning receiving device and an electrode lightning receiving system, which have the advantages that the surface electric field of a carbon fiber girder can be reduced, and the carbon fiber girder is prevented from being damaged by lightning caused by surface discharge.

The above object of the present invention is achieved by the following technical solutions: in one aspect, the present invention provides an electrode lightning receptor comprising at least two electrodes; the two electrodes are arranged at intervals to form an electrode belt, and the two electrodes are connected through a connecting piece.

Preferably, in the electrode lightning arrester provided by the present invention, a connection boss is disposed on the electrode at the end of the electrode strip, and the connection boss extends along the length direction of the electrode strip.

Preferably, the electrode lightning arrester provided by the invention is made of copper.

Preferably, in the electrode lightning arrester provided by the invention, the connecting piece is a U-shaped rod, and two ends of the connecting piece are respectively connected with the two electrodes.

Preferably, in the electrode lightning arrester provided by the invention, the connecting piece is made of copper.

In another aspect, the present invention provides an electrode lightning receptor system, comprising a blade tip lightning receptor, a blade assembly and at least two of the above-mentioned electrode lightning receptors; the tip of the blade assembly is connected with the blade tip lightning receptor, the two electrode lightning receptors are respectively arranged on two opposite sides of the blade assembly, the electrode belt in the electrode lightning receptor is positioned on the outer surface of the blade assembly and fixedly connected with the blade assembly through the connecting piece, the electrode belt extends along the first direction of the blade assembly, one end of the electrode belt is connected with the blade tip lightning receptor, and the other end of the electrode belt is in electric wire connection with the lower guide body in the blade assembly; the electrode lightning arrester is used for shielding the surface electric field of the blade assembly and inhibiting the surface discharge of the blade assembly.

Preferably, in the electrode lightning receiving system provided by the present invention, the blade assembly includes the lower guide body and the blade unit, the blade unit is enclosed into an accommodating cavity, a first support plate and a second support plate are inserted into the accommodating cavity, the first support plate and the second support plate both extend along the first direction, the first support plate and the second support plate are arranged at intervals along the second direction of the blade assembly, the accommodating cavity is divided into three chambers by the first support plate and the second support plate, the three chambers are sequentially arranged along the second direction, and the lower guide body is inserted into any one of the chambers.

Preferably, in the electrode lightning receiving system provided by the invention, the blade unit comprises two insulating shells and two main beam plates, the two main beam plates are oppositely arranged, and both the two main beam plates are arranged between the two insulating shells; the two insulating shells and the two main beam plates jointly enclose the accommodating cavity.

Preferably, in the electrode lightning receiving system provided by the present invention, the electrode belt is disposed on an outer surface of a joint of the insulating housing and the main beam plate, one end of the connecting member penetrates through the insulating housing to be connected to the electrode belt, and the electrode belt is adapted to the main beam plate.

Preferably, in the electrode lightning receiving system provided by the invention, protective nets are laid on the outer surfaces of the two main beam plates, one end of each protective net is electrically connected with the blade tip lightning receptor, and the peripheries of the protective nets are connected with the main beam plates; the protective net is used for preventing lightning from damaging the main beam plate.

In conclusion, the beneficial technical effects of the invention are as follows: the application provides an electrode lightning arrester and an electrode lightning arresting system, wherein the electrode lightning arrester comprises at least two electrodes; the two electrodes are arranged at intervals to form an electrode belt and are connected through a connecting piece; the electrode lightning receiving system comprises a blade tip lightning receiver, a blade assembly and at least two electrode lightning receiving devices; one end of the blade assembly is connected with the blade tip lightning receptor, the two electrode lightning receptors are respectively arranged on two opposite sides of the blade assembly, an electrode belt in each electrode lightning receptor is positioned on the outer surface of the blade assembly and fixedly connected with the blade assembly through a connecting piece, the electrode belt extends along the first direction of the blade assembly, one end of the electrode belt is connected with the blade tip lightning receptor, and the other end of the electrode belt is in electric wire connection with a lower guide body in the blade assembly; the electrode lightning receiving device is used for shielding the surface electric field of the blade assembly and inhibiting the surface discharge of the blade assembly; on one hand, the electrode lightning receiving device is arranged to shield the surface electric field of the blade assembly and the surface electric field of the lower guide body inside the blade assembly, so that the surface discharge of the blade assembly is inhibited, the position of the blade assembly which is most easily damaged by lightning stroke is protected, and the risk of lightning stroke damage of the blade assembly caused by failure is effectively reduced; on the other hand, be fixed in the blade subassembly with the electrode through setting up the connecting piece for the appearance and the blade subassembly phase-match of electrode band lead to the electrode to drop when avoiding the blade subassembly rotatory, simultaneously, can not influence the aerodynamic performance of blade subassembly.

Drawings

Fig. 1 is a schematic view of an overall structure of an electrode lightning receiving system according to an embodiment of the present invention.

Fig. 2 is a schematic view of an overall structure of an electrode lightning receiving system according to an embodiment of the present invention.

Fig. 3 is a first cross-sectional view of an electrode lightning receptor system according to an embodiment of the invention.

Fig. 4 is a schematic structural diagram of an electrode lightning receptor device in an electrode lightning receptor system according to an embodiment of the present invention.

Fig. 5 is a second cross-sectional view of an electrode lightning receptor system according to an embodiment of the invention.

Fig. 6 is a schematic view of a connection structure between an electrode lightning receptor and a lower lead in an electrode lightning receptor system according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an electrode at the tail end of an electrode lightning receiving system according to an embodiment of the invention.

Fig. 8 is a schematic structural diagram of an electrode lightning receptor device in an electrode lightning receptor system according to an embodiment of the invention.

Fig. 9 is a schematic view showing the connection structure of the blade assembly and the motor lightning arrester in the electrode lightning arrester system according to the embodiment of the invention (in the case that the lower guide body is in the third chamber).

Fig. 10 is a schematic view of a connection structure between the blade assembly and the lightning arrester of the electrode lightning receiving system according to the second embodiment of the present invention (in a case where the lower guide body is in the second chamber).

In the figure, 1, an electrode lightning receiving system; 10. a blade tip lightning receptor; 20. a blade assembly; 201. a lower guide body; 2011. a lightning receptor in the leaf; 202. a blade unit; 2021. a first insulating housing; 2022. a second insulating housing; 2023. a first main beam panel; 2024. a second main beam panel; 203. an accommodating cavity; 2031. a first chamber; 2032. a second chamber; 2033. a third chamber; 204. a protective net; 205. a first support plate; 206. a second support plate; 30. an electrode lightning receptor; 301. an electrode; 302. a connecting member; 3021. a first connecting rod; 3022. an arcuate bar; 3023. a second connecting rod; 303. connecting the bosses; 3031. a threaded hole; 304. fastening a bolt; 40. connecting a lead; 50. a first direction; 60. a second direction.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The field operation data shows that more than 90% of lightning stroke fault points of the blades of the carbon fiber main beam wind generating set are located in a range 5m away from the blade tip, and basically all the lightning stroke points are located in a range 20m away from the blade tip.

In view of the distribution of lightning strike points along the surface of the blade, the present invention proposes an electrode lightning receptor system 1, comprising a tip lightning receptor 10, a blade assembly 20 and at least two electrode lightning receptors 30; the tip end of the blade assembly 20 is connected to the tip lightning receptor 10, two electrode lightning receptors 30 are respectively disposed on two opposite sides of the blade assembly 20, the electrode lightning receptors 30 extend along the first direction 50 of the blade assembly 20, one end of the electrode lightning receptor 30 is connected to the tip lightning receptor 10, and the other end of the electrode lightning receptor 30 is electrically connected to the lower guide body 201 in the blade assembly 20; the electrode lightning receiving device 30 is used for shielding the surface electric field of the blade assembly 20 and inhibiting the surface discharge of the blade assembly 20; by providing the electrode lightning receptor 30, the electrode lightning receptor 30 guides lightning current to the ground, thereby protecting the blade assembly 20.

It should be noted that the first direction 50 of the blade assembly 20 is the length direction of the blade assembly 20, and the second direction 60 of the blade assembly 20 is the width direction of the blade assembly 20.

Referring to fig. 1 and 2, the blade assembly 20 and the electrode receptor 30 are both connected to the tip receptor 10 at one end, and the electrode receptor 30 is electrically connected to the lower conductor 201 at the end facing away from the tip receptor 10.

Wherein, apex receptor 10 can adopt the copper product, apex receptor 10 can also adopt aluminium material or stainless steel material, and this embodiment does not do the restriction to this. The structure and size of the tip lightning receptor 10 are adapted to the blade assembly 20, and the connection manner between the tip lightning receptor 10 and the blade assembly 20 is well known to those skilled in the art, and the connection manner between the tip lightning receptor 10 and the blade assembly 20 is not described herein in detail.

In an implementation where the tip receptor 10 is made of aluminum, the tip receptor is in the shape of a semi-sphere, and the diameter of the tip receptor 10 is in the range of 25mm to 30mm.

In this embodiment, the electrode lightning receptor system 1 comprises four electrode lightning receptors 30, wherein two electrode lightning receptors 30 are spaced along the second direction 60 on the first outer surface of the blade assembly 20; two additional electrode receptors 30 are spaced along the second direction 60 on the second outer surface of the blade assembly 20; by providing four electrode receptors 30, the safety of the blade assembly 20 is thereby further improved.

For example, in the orientation shown in fig. 9, the first outer surface of blade assembly 20 is the upper surface of blade assembly 20 and the second outer surface of blade assembly 20 is the lower surface of blade assembly 20.

With continued reference to fig. 9 and 10, in the present embodiment, the blade assembly 20 includes a lower guide body 201 and a blade unit 202, the blade unit 202 is enclosed into a receiving cavity 203, a first supporting plate 205 and a second supporting plate 206 are inserted into the receiving cavity 203, both the first supporting plate 205 and the second supporting plate 206 extend along the first direction 50, the first supporting plate 205 and the second supporting plate 206 are disposed at intervals along the second direction 60 of the blade assembly 20, the receiving cavity 203 is divided into three chambers by the first supporting plate 205 and the second supporting plate 206, the three chambers are sequentially disposed along the second direction 60, and the lower guide body 201 is inserted into any one of the chambers.

Taking the orientation shown in fig. 9 as an example, the three chambers are a first chamber 2031, a second chamber 2032 and a third chamber 2033 from left to right, the second chamber 2032 is located between the first chamber 2031 and the third chamber 2033, and the lower guide 201 can be inserted into any one of the chambers.

With continued reference to fig. 1, 9, and 10, one end of the blade unit 202 is connected to the tip lightning receptor 10, the first support plate 205 and the second support plate 206 are both inserted into the accommodating cavity 203, the first support plate 205 and the second support plate 206 are both disposed perpendicular to the second direction 60, the first support plate 205 and the second support plate 206 are disposed in parallel, and the first support plate 205 and the second support plate 206 are disposed at intervals along the second direction 60; by providing the first support plate 205 and the second support plate 206, the strength of the blade unit 202 is improved.

Specifically, the lower guide body 201 is rod-shaped, one end of the lower guide body 201 is connected to the tip lightning receptor 10, and the other end of the lower guide body 201 is electrically connected to the electrode lightning receptor 30. The lower guide body 201 may be a twisted wire made of a copper material, and the lower guide body 201 may also be a twisted wire made of an aluminum material or a stainless steel material, which is not limited in this embodiment.

According to the requirement of minimum sectional area of a plurality of strands of twisted wires provided by IEC61400-24, the sectional area of each strand of twisted wire ranges from 16mm ² -50mm ² 。

Wherein, in the realizable manner that the lower guide body 201 is made of copper, the cross-sectional area range of the lower guide body 201 is more than or equal to 16mm ² (ii) a In an implementation manner that the lower guide body 201 is made of aluminum, the cross-sectional area of the lower guide body 201 is greater than or equal to 25mm ² (ii) a In an implementation manner that the lower guide body 201 is made of stainless steel, the cross-sectional area of the lower guide body 201 is greater than or equal to 50mm ² 。

Wherein, lead 201 and electrode lightning arrester 30 connection of leading down, lead 201 down and be connected with electrode lightning arrester 30 through connecting wire 40, and the one end and the lead 201 of leading down of connecting wire 40 are connected, and the other end and the electrode lightning arrester 30 of connecting wire 40 are connected.

The connecting wires 40 may be made of aluminum, and the connecting wires 40 may also be made of stainless steel, which is not limited in this embodiment. Wherein the cross-sectional area of the connecting wire 40 is adapted to the lower lead 201.

Illustratively, the connecting wire 40 may be connected to the lower guide body 201 by welding, and of course, the connecting wire 40 may also be connected to the lower guide body 201 by banding. In the implementation mode that the connecting wire 40 is connected with the lower guide body 201 in a welding manner, after the lower guide body 201 is connected with the electrode lightning receiving device 30 through the connecting wire 40, the conductivity of the electrode lightning receiving system 1 is tested, so that the electrode lightning receiving system 1 has good current capacity for lightning current with amplitude of 200 kA.

With continued reference to fig. 9 and 10, in the present embodiment, the blade unit 202 includes two insulating housings and two spar plates, the two insulating housings are spaced apart along the second direction 60, the two spar plates are disposed opposite to each other, and both the spar plates are disposed between the two insulating housings; the two insulating housings and the two main beam plates jointly enclose a receiving cavity 203.

For example, the main beam plate can be made of carbon fiber, and the brilliant shell can be made of glass fiber.

Specifically, the two insulating housings have different structures, and the two insulating housings are a first insulating housing 2021 and a second insulating housing 2022, respectively, and taking the orientation shown in fig. 9 as an example, the first insulating housing 2021 is located on the left side of the main beam plate, and the second insulating housing 2022 is located on the right side of the main beam plate; the cross-sectional shape of the first insulating housing 2021 is U-shaped, the closed end of the first insulating housing 2021 is a blade leading edge, the cross-sectional shape of the second insulating housing 2022 is V-shaped, the sharp end of the second insulating housing 2022 is a blade trailing edge, and the blade leading edge is opposite to the blade trailing edge.

The open end of the first insulating housing 2021 is opposite to the open end of the second insulating housing 2022, and the two main beam plates are disposed between the first insulating housing 2021 and the second insulating housing 2022. Specifically, the two main beam plates have different structures, and are respectively a first main beam plate 2023 and a second main beam plate 2024, and taking the orientation shown in fig. 9 as an example, the first main beam plate 2023 is located at the upper portion, the second main beam plate 2024 is located at the lower portion, a side of the first main beam plate 2023 away from the second main beam plate 2024 is a Pressure Surface (PS), and a side of the second main beam plate 2024 away from the first main beam plate 2023 is a Suction Surface (SS).

Referring to fig. 9 and 10, the first and second main beam panels 2023 and 2024 each extend along the first direction 50, one end of the first main beam panel 2023 is connected to the first mounting edge of the open end of the first insulating case 2021, and the other end of the first main beam panel 2023 is connected to the first connecting edge of the open end of the second insulating case 2022; one end of the second main beam plate 2024 is connected to the second mounting edge of the open end of the first insulating housing 2021, and the other end of the second main beam plate 2024 is connected to the second connecting edge of the open end of the second insulating housing 2022, so that the two insulating housings and the two main beam plates together enclose the accommodating cavity 203.

With continued reference to fig. 1-8, the electrode lightning receptor 30 in the present embodiment comprises at least two electrodes 301; the two electrodes 301 are arranged at intervals to form an electrode belt, and the two electrodes 301 are connected through a connecting piece 302; in use, the electrode strips are located on the outer surface of the blade assembly 20, the electrode strips are fixedly connected with the blade assembly 20 through the connecting pieces 302, the electrode strips extend along the first direction 50, one end of the electrode strips is connected with the tip lightning receptor 10, and the other end of the electrode strips is in electrical connection with the lower guide body 201 in the blade assembly 20.

Specifically, the electrode 301 at the head end of the electrode strip is connected with the blade tip lightning receptor 10, and the electrode 301 at the tail end of the electrode strip is connected with the lower conductor 201 through a wire, so that the electrode lightning receptor 30 effectively shields the surface electric field of the main beam plate, head-on discharge is generated under the diversion and renting of the electrode lightning receptor 30 to intercept down lightning, and lightning current is conducted to the ground so as to protect the main beam plate.

Taking the orientation shown in fig. 1 as an example, the first electrode 301 of the electrode strip is located at the top end of the electrode strip, the second electrode 301 of the electrode strip is located at the bottom end of the electrode strip, the first electrode 301 is used for connecting to the tip lightning receptor 10, and the second electrode 301 of the tail end is used for connecting to the down conductor 201 by wire.

Wherein, the electrode 301 of head end can adopt the welded mode to be connected with apex arrester 10, and the electrode 301 of head end also can adopt bolted connection's mode to be connected with apex arrester 10, and this embodiment does not do the restriction to this, as long as can ensure that electrode lightning arrester 30 can with apex arrester 10 electrical connection.

Further, in this embodiment, the electrode belt is disposed on the outer surface of the joint of the insulating housing and the main beam plate, one end of the connecting member penetrates through the insulating housing and is connected with the electrode belt, and the electrode belt is adapted to the main beam plate; through setting up the electrode zone in the junction of insulating housing and girder board, electrode lightning arrester 30 can effectively shield girder board surface electric field, produces the discharge of meeting the face under the effect that electrode lightning arrester 30 has the water conservancy diversion concurrently and intercepts down thunder and lightning, conducts the lightning current to ground to play the effect of protection girder board.

Taking the orientation shown in fig. 9 as an example, in an implementation mode in which the electrode lightning receiving system 1 includes four electrode lightning receiving devices 30, the four electrode lightning receiving devices 30 are respectively a first electrode lightning receiving device, a second electrode lightning receiving device, a third electrode lightning receiving device and a fourth electrode lightning receiving device, wherein an electrode strip in the first electrode lightning receiving device and an electrode strip in the second electrode lightning receiving device are disposed at an interval on the first outer surface of the blade assembly 20, and an electrode strip in the third electrode lightning receiving device and an electrode strip in the fourth electrode lightning receiving device are disposed at an interval on the second outer surface of the blade assembly 20.

Specifically, the electrode strip in the first electrode lightning receptor is arranged on the outer surface of the joint of the first main beam plate 2023 and the first mounting edge, and the electrode strip in the second electrode lightning receptor is arranged on the outer surface of the joint of the first main beam plate 2023 and the first mounting edge; the electrode strip in the third electrode lightning receptor is arranged on the outer surface of the joint of the second main beam plate 2024 and the second mounting edge, and the electrode strip in the fourth electrode lightning receptor is arranged on the outer surface of the joint of the second main beam plate 2024 and the second mounting edge.

The radian of the electrode belt is basically consistent with the edge radian of the main beam plate, and the radian of the electrode belt is ensured to be consistent with the surface radian of the blade unit 202 as far as possible, so that the influence on the aerodynamic shape of the blade unit 202 is reduced.

In this embodiment, at least one pair of midleaf lightning receptors 2011 is disposed on the lower guide body 201, the midleaf lightning receptor 2011 is located in the accommodating cavity 203, and the midleaf lightning receptor 2011 is electrically connected to the lower guide body 201.

Illustratively, the cross-sectional shape of the electrode 301 may be rectangular, but of course, the cross-sectional shape of the electrode 301 may also be diamond-shaped or trapezoidal. In an implementable manner in which the cross-sectional shape of the electrode 301 is rectangular, the electrode 301 extends along the first direction 50.

The electrode 301 may be made of copper, and of course, the electrode 301 may be made of other metals. In the realizable manner that the cross section of the electrode 301 is rectangular and made of copper, the length range of the electrode 301 is 0.3m-0.5m, the thickness range of the electrode 301 is 5mm-10mm, and the width range of the electrode 301 is 3cm-5cm; the electrode 301 is made of copper, so that the high-temperature resistance of the copper is high, and the high-temperature resistance of the electrode 301 is improved.

Specifically, the two electrodes 301 are spaced apart by a predetermined distance, which is in a range from 15cm to 25cm, and in this embodiment, the predetermined distance is 20cm.

In the use process, the electrode belt is arranged on the outer surface of the joint of the main beam plate and the insulating shell, the connecting piece 302 is positioned in the accommodating cavity 203, and one end of the connecting piece 302 penetrates through the insulating shell to be connected with the two electrodes 301.

Further, the connecting member 302 is a U-shaped rod, and both ends of the connecting member 302 are respectively connected to the two electrodes 301.

Specifically, the connecting piece 302 includes a first connecting rod 3021, a second connecting rod 3023 and an arc rod 3022, the first connecting rod 3021 and the second connecting rod 3023 are disposed oppositely, the central axis of the first connecting rod 3021 is parallel to the central axis of the second connecting rod 3023, the first connecting rod 3021 and the second connecting rod 3023 are connected through the arc rod 3022, one end of the arc rod 3022 is connected with the first connecting rod 3021, the other end of the arc rod 3022 is connected with the second connecting rod 3023, the first connecting rod 3021, the second connecting rod 3023 and the arc rod 3022 jointly form a U shape.

It should be noted that, taking the orientation shown in fig. 3 as an example, the first connecting rod 3021 is located on the left side of the arc rod 3022, and the second connecting rod 3023 is located on the right side of the arc rod 3022. Wherein, the two ends of the connecting piece 302 are respectively one end of the first connecting rod 3021 deviating from the arc rod 3022 and one end of the second connecting rod 3023 deviating from the arc rod 3022.

Illustratively, the arc rod 3022 may be integrally formed with the first connecting rod 3021 and the second connecting rod 3023 by casting, and of course, the arc rod 3022 may also be connected to the first connecting rod 3021 and the second connecting rod 3023 by welding.

In use, the arc rod 3022 is located in the accommodation cavity 203, one end of the first connecting rod 3021 facing away from the arc rod 3022 passes through the insulating housing and is connected to one of the electrodes 301, and one end of the second connecting rod 3023 facing away from the arc rod 3022 passes through the insulating housing and is connected to the other electrode 301.

Of course, the connecting member 302 may be an H-shaped rod or a V-shaped rod, as long as the connection between the two electrodes 301 can be realized and the two electrodes 301 are fixed on the blade unit 202.

Illustratively, the connecting member 302 is made of copper; of course, other metal materials may be used for the connecting member 302.

In this embodiment, the electrode lightning receiving device 30 may include a plurality of electrodes 301, the plurality of electrodes 301 are disposed at intervals along the first direction 50 to form an electrode strip, and every two adjacent electrodes 301 in the electrode strip are connected by a connecting member 302.

In particular, the electrode strips extend along the first direction 50, and have a length in the range of 18m to 22m, and in this embodiment, the length of 20m.

With continued reference to fig. 1 to 8, in order to facilitate the connection of the electrode strip to the lower lead 201, a connection boss 303 is provided on the electrode 301 located at the end of the electrode strip, the connection boss 303 extending along the length direction of the electrode strip.

Continuing to refer to fig. 7 and 8, specifically, the connection boss 303 is disposed on the electrode 301 at the tail end of the electrode, the connection boss 303 is located on one side of the tail end electrode 301 departing from the blade tip lightning arrester 10, the connection boss 303 extends along the first direction 50, a threaded hole 3031 is formed in the connection boss 303, the threaded hole 3031 penetrates through the connection boss 303, a fastening bolt 304 penetrates through the threaded hole 3031, and one end of the connection lead 40 departing from the lower guide body 201 is connected with the fastening bolt 304.

The fastening bolt 304 is made of metal.

Further, in this embodiment, protective nets 204 are laid on the outer surfaces of the two main beam plates, one end of each protective net 204 is electrically connected to the blade tip lightning receptor 10, and the peripheries of the protective nets 204 are connected to the main beam plates; the protection mesh 204 is used to prevent lightning from damaging the girder plates.

Specifically, protective nets 204 are laid on the pressure surface of the first main beam plate 2023 and the suction surface of the second main beam plate 2024, taking the orientation shown in fig. 1 as an example, the top ends of the protective nets 204 are connected to the blade tip lightning receptor 10, the remaining three sides of the protective nets 204 are connected to the main beam plates through a plurality of bolts, and the plurality of bolts are arranged around the main beam plates at intervals in the circumferential direction so that the protective nets 204 are connected to the main beam plates at the same potential, thereby balancing the potential difference between the protective nets 204 and the main beam plates.

The protection net 204 may be made of copper material, and the protection net 204 may also be made of aluminum alloy material, which is not limited in this embodiment.

In the realizable manner that the protection net 204 is made of copper, the copper has good conductivity and conformability, and thus, the wire performance of the protection net 204 is improved.

In the implementation mode that the protection net 204 is made of the aluminum alloy, the aluminum alloy has good conductivity and lighter weight, and the load of the girder plate can be reduced.

Specifically, the circumference of the protective net 204 is rounded so that the protective net 204 is not prone to form partial discharge, and the overall current conduction distribution of the lightning strike electrode system 1 is uniform.

The working principle of the electrode lightning receiving system 1 provided by the embodiment is as follows: in the absence of a lightning environment, the electrode lightning receptor 30 does not affect the electric field of the lower conductor 201 on the surface and inside the blade assembly 20; when the thundercloud descending leader approaches the blade assembly 20 in the lightning environment, the structure of the electrode lightning arrester 30 is outstanding, the curvature radius of the electrode 301 is small, the surface electric field of the electrode 301 is strong enough, the surface electric field of the main beam plate and the lower guide body 201 is shielded, the surface discharge of the main beam plate is inhibited, and therefore the lightning strikes the electrode lightning arrester 30, flows into the ground through the lower guide body 201, and finally the effect of protecting the blade assembly 20 is achieved.

In the electrode lightning receptor 30 and the electrode lightning receptor system 1 provided by the present application, the electrode lightning receptor 30 comprises at least two electrodes 301; the two electrodes 301 are arranged at intervals to form an electrode belt, and the two electrodes 301 are connected through a connecting piece 302; the electrode lightning receptor system 1 comprises a blade tip lightning receptor 10, a blade assembly 20 and at least two electrode lightning receptors 30; one end of the blade assembly 20 is connected with the tip lightning receptor 10, the two electrode lightning receptors 30 are respectively arranged on two opposite sides of the blade assembly 20, electrode strips in the electrode lightning receptors 30 are located on the outer surface of the blade assembly 20, the electrode strips are fixedly connected with the blade assembly 20 through a connecting piece 302, the electrode strips extend along the first direction 50 of the blade assembly 20, one end of each electrode strip is connected with the tip lightning receptor 10, and the other end of each electrode strip is in electrical connection with the lower guide body 201 in the blade assembly 20; the electrode lightning arrester 30 is used for shielding the surface electric field of the blade assembly 20 and inhibiting the surface discharge of the blade assembly 20; on one hand, by arranging the electrode lightning receiving device 30, the surface electric field of the blade assembly 20 and the internal lower guide body 201 is shielded, so that the surface discharge of the blade assembly 20 is inhibited, the position of the blade assembly 20 which is most vulnerable to lightning stroke is protected, and the risk of lightning stroke damage of the blade assembly 20 caused by failure is effectively reduced; on the other hand, through setting up connecting piece 302 with electrode 301 fixed in on the blade subassembly 20 for the appearance and the blade subassembly 20 phase-match of electrode area lead to electrode 301 to drop when avoiding blade subassembly 20 to rotate, simultaneously, can not influence the aerodynamic performance of blade subassembly 20.

The electrode lightning arrester 30 provided by the invention has the following advantages: the device has simple structure, easy manufacture and convenient installation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications are intended to be within the scope of the present invention.

Claims (10)

1. An electrode lightning receiving device, its characterized in that: comprises at least two electrodes;

the two electrodes are arranged at intervals to form an electrode belt, and the two electrodes are connected through a connecting piece.

2. The electrode receptor of claim 1, wherein: and the electrode at the end part of the electrode belt is provided with a connecting boss, and the connecting boss extends along the length direction of the electrode belt.

3. The electrode receptor of claim 1, wherein: the electrodes are made of copper materials.

4. The electrode receptor of claim 1, wherein: the connecting piece is a U-shaped rod, and two ends of the connecting piece are respectively connected with the two electrodes.

5. The electrode receptor of claim 4, wherein: the connecting piece is made of copper.

6. An electrode lightning receptor system, comprising: comprising a tip receptor, a blade assembly and at least two electrode receptors according to any one of claims 1 to 5;

one end of the blade assembly is connected with the blade tip lightning receptor, the two electrode lightning receptors are respectively arranged on two opposite sides of the blade assembly, the electrode belt in the electrode lightning receptor is positioned on the outer surface of the blade assembly and is fixedly connected with the blade assembly through the connecting piece, the electrode belt extends along the first direction of the blade assembly, one end of the electrode belt is connected with the blade tip lightning receptor, and the other end of the electrode belt is in electric wire connection with the lower guide body in the blade assembly;

the electrode lightning arrester is used for shielding the surface electric field of the blade assembly and inhibiting the surface discharge of the blade assembly.

7. The electrode lightning system according to claim 6, wherein: the blade subassembly includes guide body and blade unit down, the blade unit encloses into the holding cavity, the holding cavity interpolation is equipped with first backup pad and second backup pad, first backup pad with the second backup pad all along the first direction extends, first backup pad with the second backup pad along the second direction interval of blade subassembly sets up, first backup pad with the second backup pad will three cavity, three are cut apart into to the holding cavity the cavity along the second direction sets gradually, down the guide body insert locate arbitrary in the cavity.

8. The electrode lightning system according to claim 7, wherein: the blade unit comprises two insulating shells and two main beam plates, the two main beam plates are oppositely arranged, and the two main beam plates are arranged between the two insulating shells;

the two insulating shells and the two main beam plates jointly enclose the accommodating cavity.

9. The electrode lightning system according to claim 8, wherein: the electrode belt is arranged on the outer surface of the joint of the insulating shell and the main beam plate, one end of the connecting piece penetrates through the insulating shell and is connected with the electrode belt, and the electrode belt is matched with the main beam plate.

10. The electrode lightning system according to claim 8, wherein: protective nets are paved on the outer surfaces of the two main beam plates, one ends of the protective nets are electrically connected with the blade tip lightning receptors, and the peripheries of the protective nets are connected with the main beam plates;

the protective net is used for preventing lightning from damaging the main beam plate.

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