CN214412281U - Lightning protection system - Google Patents
Lightning protection system Download PDFInfo
- Publication number
- CN214412281U CN214412281U CN202022978916.8U CN202022978916U CN214412281U CN 214412281 U CN214412281 U CN 214412281U CN 202022978916 U CN202022978916 U CN 202022978916U CN 214412281 U CN214412281 U CN 214412281U
- Authority
- CN
- China
- Prior art keywords
- cable
- lightning protection
- protection system
- equipment
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Wind Motors (AREA)
Abstract
An embodiment of the present application provides a lightning protection system, includes: the wind power generation device comprises a cabin, a wind power generation device and a wind power generation device, wherein the cabin is internally provided with the wind power generation device; the tower is fixedly connected with the bottom of the engine room; the first secondary equipment is arranged on the ground; a first cable line connecting the wind power generation equipment and the first secondary equipment, the first cable line comprising a first cable connection section, the first cable connection section being located at the bottom of the nacelle; the first surge protector is connected with the first cable connecting section and can protect first secondary equipment.
Description
Technical Field
The application relates to the technical field of wind power generation, and relates to but is not limited to a lightning protection system.
Background
The general height of the fan can reach 150-200 meters, so that the fan is very easy to be a lightning stroke object, and for lightning protection of the fan, detailed regional division and lightning protection design requirements are carried out on a plurality of standards. For example, the international electrotechnical commission divides the protection area against lightning overvoltage into: LPZ0 region (LPZ0A, LPZ0B), LPZ1 region, LPZ2 region. In case of a good grounding of the metal tower, the blades, the outside of the nacelle (including the nacelle), the outside of the tower (including the tower), the box transformer should belong to the LPZ0 area, which are the areas subject to direct lightning strike (detour) or not subject to direct lightning strike but without attenuation of the electromagnetic field. The equipment in the nacelle and in the tower shall belong to the LPZ1 area, which includes cables, generators, gear boxes, etc. The equipment in the electrical cabinet in the tower, particularly the weak current part with better shielding, belongs to LPZ 2. Wind generating set specifications and GBZ25427 published by China classification society 2008 divide lightning protection areas in detail.
In addition to direct grounding along a metal body such as a tower barrel, lightning current also flows through shielding layers of various cables in an engine room and a box transformer, and the current affects secondary equipment connected with the cables through transfer impedance, so that port voltage of the secondary equipment exceeds a limit value under the condition of accumulation, and safe operation is affected.
Different lightning protection methods for different areas are also explained in the above standards, and mainly include various lightning protection shielding designs, parallel copper bars, surge protectors used for secondary equipment ports and other schemes. And due to the use of the optical fiber, the number of connecting wires between the wind turbine cabin and the distribution transformer is reduced, so that common mode interference and differential mode interference caused by lightning strike are reduced. Inevitably there is still part of the cable from the wind turbine nacelle through the hub, tower connection to the distribution transformer, which leads the common ground of the secondary equipment in the region of LPZ2 within the nacelle, which is closer to the lightning strike point, directly through the cable shield to the common ground of the secondary equipment in the region of the distribution transformer internal LPZ 2.
After the fan is installed, electrical structure such as cable is fixed, according to above-mentioned design, it is outdated that must have lightning current to flow, if surge protector action appears, the surge protector of cabin side is because it is close apart from the thunderbolt point, the action is more frequent, can lead to the whole surge protector releases through the surge protector of action rather than the cable internal energy that is connected during its action, to longer cable in the fan, the electromagnetic energy of its storage is great to release at the surge protector port, increased protector or even secondary equipment and damaged the risk.
The surge protector for distribution measurement acts more because of the differential mode or common mode voltage caused by the lightning current flowing into the earth post-ground. And the secondary equipment on the nacelle side is not all equipped with surge protectors, which results in greater risk in locations where no surge protectors are installed.
Disclosure of Invention
To address the above issues, the present application provides a lightning protection system.
The application provides a lightning protection system, includes:
the wind power generation device comprises a cabin, a wind power generation device and a wind power generation device, wherein the cabin is internally provided with the wind power generation device;
the tower is fixedly connected with the bottom of the engine room;
the first secondary equipment is arranged on the ground;
a first cable line connecting the wind power generation equipment and the first secondary equipment, the first cable line comprising a first cable connection section, the first cable connection section being located at the bottom of the nacelle;
and the first surge protector is connected with the first cable connecting section.
In some embodiments, the lightning protection system further comprises:
the second secondary equipment is arranged in the engine room;
a second cable line connecting the second secondary equipment and the wind power generation equipment;
and the second surge protector is connected with the second cable and is positioned between the second secondary equipment and the wind power generation equipment.
In some embodiments, the first cable wire further comprises a second cable connection segment, the second cable connection segment
The joint section is positioned at the bottom of the tower;
the lightning protection system further comprises:
and the third surge protector is connected with the second cable connecting section.
In some embodiments, the first cable line is connected to the first secondary device through the surface.
In some embodiments, the first secondary device comprises at least one of: distribution equipment and centralized control center equipment.
In some embodiments, the lightning protection system further comprises: the fan blade is arranged on the engine room.
In some embodiments, the first electrical cable comprises: the cable comprises a cable core and a shielding layer wrapping the cable core, wherein the first surge protector is arranged between the cable core and the shielding layer.
In some embodiments, the first surge protector includes a plurality of which are integrated together.
In some embodiments, the lightning protection system further comprises a shielding box in which the plurality of first surge protectors is disposed.
In some embodiments, the shielding box is made of copper.
The application provides a lightning protection system, through connecting first surge protector on the first cable conductor in the bottom position of cabin, when the cabin is hit by the thunder and lightning, voltage reaches first surge protector's protection voltage, first surge protector is at the bottom release energy in the cabin, thereby can reduce the first secondary equipment that the transfer impedance influence and first cable conductor of cable are connected, and can reduce the voltage of the port of first secondary equipment, the voltage that can avoid the port of first secondary equipment exceeds the voltage threshold value, and then can protect first secondary equipment.
Drawings
The present application will be described in more detail below on the basis of embodiments and with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a lightning protection system according to an embodiment of the present disclosure;
fig. 2 is a schematic view of an installation structure of a plurality of first surge protectors according to an embodiment of the present application.
Detailed Description
The following detailed description will be provided with reference to the accompanying drawings and embodiments, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and various features in the embodiments of the present application can be combined with each other without conflict, and the formed technical solutions are all within the scope of protection of the present application.
The application provides a lightning protection system, and fig. 1 is a schematic structural diagram of a lightning protection system provided in an embodiment of the application, as shown in fig. 1, including: the system comprises a cabin 1, a tower 2, first secondary equipment 3, a first cable 4 and a first surge protector 5; a wind power generation device 6 is arranged in the engine room; the tower 2 is fixedly connected with the bottom of the engine room 1; the first secondary equipment 3 is arranged on the ground; a first cable line 4 connecting the power generation equipment 6 and the first secondary equipment 3, the first cable line 4 comprising a first cable connection section, the first cable connection section being located at the bottom of the nacelle 1; the first surge protector 5 is connected to the first cable connection section.
In the embodiment of the present application, the wind power generation device 6 may be a transformer, a generator, or the like, and the first secondary device 3 may be a power distribution device or a centralized control center device. It may be that the first cable line 4 is grounded and the first secondary device 3 is grounded, thereby completing the connection of the first cable line 4 with the wind power plant 6 and the first secondary device 3.
In the embodiment of the application, when the first surge protector selects parameters, the maximum continuous operation voltage may be set according to that the lower limit is not lower than 1.1 times of the rated operation voltage of the first secondary device, and the upper limit is not higher than the maximum continuous operation voltage of the first surge protector of the cable on the cabin side.
In some embodiments, the first surge protector may be selected as follows for the area where the lightning characteristic parameter is available.
The utility model provides a lightning protection system, connect first surge protector 5 on first cable conductor 4 through the bottom position in cabin 1, when cabin 1 is hit by the thunder and lightning, voltage reaches first surge protector 5's protection voltage, first surge protector 5 is at the bottom release energy in cabin 1, thereby can reduce first secondary equipment 3 that the transfer impedance influence of first cable conductor 4 is connected with first cable conductor 4, and can reduce the voltage of first secondary equipment 3's port, the voltage that can avoid first secondary equipment 3's port exceeds the voltage threshold value, and then can protect first secondary equipment 3.
In some embodiments, the lightning protection system further comprises: the second secondary cable, the second cable and the second surge protector are arranged; the second secondary equipment is arranged in the engine room; a second cable line connects the second secondary equipment and the wind power generation equipment; and the second surge protector is connected with the second cable and is positioned between the second secondary equipment and the wind power generation equipment.
In the embodiment of the application, the second secondary equipment can be protected by arranging the second surge protector.
With continued reference to fig. 1, in some embodiments, the first cable, 4, further comprises a second cable connection section located at the bottom of the tower 2; the lightning protection system further comprises: and the third surge protector 7 is connected with the second cable connecting section. In the embodiment of the present application, the third surge protector 7 is disposed at the second cable connection section, so that the first secondary device 3 can be further protected.
In the embodiment of the application, the surge overvoltage of the cable port is obtained through calculation under the condition that the fan blade or the cabin is struck by lightning, if the surge overvoltage is lower than the rated operation voltage of equipment, a surge protector is not required to be installed, if the calculation result is higher than the rated operation voltage, the surge overvoltage at two positions of the joint of the cable and the cabin and the surge overvoltage at the bottom of the tower cylinder and the rated operation voltage of the equipment which is 1.1 times of the surge overvoltage at the bottom of the tower cylinder are selected, and the minimum value of the surge overvoltage and the surge protector is used as the maximum continuous operation voltage of the second surge protector at the bottom end of the tower cylinder.
For example, taking a wind turbine with a tower height of 100m as an example, the lightning current is 10/350us standard lightning current, and the peak value of the lightning current in the area where the wind turbine is located is 200 kA. The maximum value of the surge impact voltage of the cable at the joint of the cable and the cabin is 1020V, and the maximum value of the surge impact voltage of the cable at the bottom of the tower is 1372V. Both values are higher than the rated voltage (220V) of 1.1 times of the connecting equipment, so the maximum continuous operation voltage of the second surge protector at the bottom end of the tower is set to 242V, and the lightning current of about 35kA can be protected actually, and the lightning current lower than the intensity does not act on the second surge protector and cause equipment failure.
In some embodiments, the first cable line is connected to the first secondary device through the surface.
In some embodiments, the first secondary device comprises at least one of: distribution equipment and centralized control center equipment.
In some embodiments, the lightning protection system further comprises: the fan blade is arranged on the engine room.
In some embodiments, the first electrical cable comprises: the cable comprises a cable core and a shielding layer wrapping the cable core, wherein the first surge protector is arranged between the cable core and the shielding layer.
In some embodiments, the first surge protector includes a plurality of which are integrated together.
In the embodiment of the application, the occupied space can be reduced by integrating a plurality of first surge protectors together.
In some embodiments, the lightning protection system further includes a shielding box, fig. 2 is a schematic view of an installation structure of a plurality of first surge protectors provided in the embodiments of the present application, and as shown in fig. 2, a plurality of first surge protectors 5 are disposed in the shielding box 8.
In some embodiments, the shielding box is made of copper.
In the embodiment of the application, when the judgment result of the engine abnormity is determined, the execution module adds an abnormity label. When the engine is determined to be normal, the execution module adds a normal tag to the engine.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional units in the embodiments of the present application may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (10)
1. A lightning protection system, comprising:
the wind power generation device comprises a cabin, a wind power generation device and a wind power generation device, wherein the cabin is internally provided with the wind power generation device;
the tower is fixedly connected with the bottom of the engine room;
the first secondary equipment is arranged on the ground;
a first cable line connecting the wind power generation equipment and the first secondary equipment, the first cable line comprising a first cable connection section, the first cable connection section being located at the bottom of the nacelle;
and the first surge protector is connected with the first cable connecting section.
2. The lightning protection system of claim 1, further comprising:
the second secondary equipment is arranged in the engine room;
a second cable line connecting the second secondary equipment and the wind power generation equipment;
and the second surge protector is connected with the second cable and is positioned between the second secondary equipment and the wind power generation equipment.
3. The lightning protection system of claim 1, wherein the first cable wire further comprises a second cable connection section, the second cable connection section being located at a bottom of the tower;
the lightning protection system further comprises:
and the third surge protector is connected with the second cable connecting section.
4. The lightning protection system of claim 1, wherein the first cable line is connected to the first secondary device through the ground.
5. The lightning protection system of claim 1, wherein the first secondary device comprises at least one of: distribution equipment and centralized control center equipment.
6. The lightning protection system of claim 1, further comprising: a fan blade disposed on the nacelle.
7. The lightning protection system of claim 1, wherein the first cable wire comprises: the cable comprises a cable core and a shielding layer wrapping the cable core, wherein the first surge protector is arranged between the cable core and the shielding layer.
8. The lightning protection system of claim 1, wherein the first surge protector comprises a plurality of the first surge protector integrated together.
9. The lightning protection system of claim 8, further comprising:
the shielding box, a plurality of first surge protectors set up in the shielding box.
10. The lightning protection system of claim 9, wherein the shielding box is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022978916.8U CN214412281U (en) | 2020-12-08 | 2020-12-08 | Lightning protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022978916.8U CN214412281U (en) | 2020-12-08 | 2020-12-08 | Lightning protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214412281U true CN214412281U (en) | 2021-10-15 |
Family
ID=78038701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022978916.8U Active CN214412281U (en) | 2020-12-08 | 2020-12-08 | Lightning protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214412281U (en) |
-
2020
- 2020-12-08 CN CN202022978916.8U patent/CN214412281U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Glushakow | Effective lightning protection for wind turbine generators | |
| CN201401288Y (en) | Wind generating set utilizing lightning protection design scheme | |
| CN105243176B (en) | A kind of signature analysis of 110kV/220kV transmission line of electricity optimization collocation arrester | |
| CN111740349B (en) | Overhead ground wire configuration method for power distribution network and overhead ground wire | |
| CN107991559A (en) | A kind of large-scale grounding network ground potential rises the check method of limiting value | |
| CN205089532U (en) | Wind generating set lightning protection system and contain wind generating set of this system | |
| CN214412281U (en) | Lightning protection system | |
| Rizk et al. | Investigation of novel DC wind farm layout during continuous operation and lightning strikes | |
| CN206878459U (en) | A kind of electric-power metering comprehensive protection device | |
| CN201994656U (en) | Large-scale lightning protection system for marine wind generating set | |
| CN205304237U (en) | Earth potential counterattack protection grounding box | |
| CN206807146U (en) | Traction Substation of Electric Railway electrical secondary system integrated lightning protection cabinet | |
| Soloot et al. | The assessment of overvoltage protection within energization of offshore wind farms | |
| CN210468154U (en) | Aviation retrofit gas turbine control system grounding device | |
| CN110147634B (en) | Fan blade lightning stroke protection method based on lightning receptor installation criterion | |
| CN201478819U (en) | Power supply lightning protection unit of power supply lightning protection cabinet | |
| Tingfang et al. | Lightning protection of wind turbines | |
| CN219654822U (en) | Wind generating set | |
| CN209472360U (en) | Substation secondary device lightning protection device | |
| CN206274586U (en) | Wind-powered electricity generation box type transformer | |
| CN110829402A (en) | Lightning protection system for wind field current collection line | |
| Djalel et al. | Protection of wind turbine against the lightning damage | |
| CN202417821U (en) | Wind power communication control system | |
| CN219418675U (en) | Lightning-proof transformer | |
| CN205977564U (en) | Wind generating set and cabin lightning protection system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |