CN112302884A - Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment - Google Patents
Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment Download PDFInfo
- Publication number
- CN112302884A CN112302884A CN201910708147.9A CN201910708147A CN112302884A CN 112302884 A CN112302884 A CN 112302884A CN 201910708147 A CN201910708147 A CN 201910708147A CN 112302884 A CN112302884 A CN 112302884A
- Authority
- CN
- China
- Prior art keywords
- resistance
- wind turbine
- blade
- turbine blade
- measuring
- 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.)
- Pending
Links
- 238000003860 storage Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 title abstract description 8
- 239000004020 conductor Substances 0.000 claims abstract description 50
- 238000009413 insulation Methods 0.000 claims abstract description 33
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 16
- 239000011810 insulating material Substances 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 4
- 230000001747 exhibiting effect Effects 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims 3
- 230000005611 electricity Effects 0.000 claims 1
- 230000005684 electric field Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 210000001331 nose Anatomy 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004412 Bulk moulding compound Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000004634 thermosetting polymer Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001354498 Dracophyllum minimum Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present disclosure provides a wind turbine and a blade thereof, a resistance detection method, a storage medium, and an electronic device. The wind turbine blade comprises a lightning receptor, a down conductor, a grounding device, a measuring cable and a resistance measuring device, wherein the lightning receptor, the down conductor, the grounding device and the measuring cable are sequentially connected in series to form a closed loop; the resistance measuring device is electrically connected with the down lead to form a first connection point, and the resistance measuring device is electrically connected with the measuring cable to form a second connection point; the first connecting point and the second connecting point divide the closed loop into a first half loop and a second half loop, the resistance of the first half loop is a first resistance, the resistance of the second half loop is a second resistance, and the total resistance is the parallel connection of the first resistance and the second resistance. In addition, the down lead and the measuring cable are sealed in the insulating device, the insulating device can effectively avoid insulation breakdown caused by potential difference caused between the cables, the electric field clustering effect between the two cables is weakened, and the probability of the blade being hit by lightning is obviously reduced.
Description
Technical Field
The present disclosure relates generally to the field of wind power generation technology, and more particularly, to a wind turbine and wind turbine blades thereof, and a method of detecting safety of a lightning protection system of a wind turbine blade, as well as a storage medium and an electronic device.
Background
With the rapid development of the wind power industry, the distribution range of a wind power plant is wider and wider, and simultaneously, the blades gradually tend to be developed in a large scale, so that the height of a tower is continuously increased, the diameter of a wind wheel is continuously increased, and the like. In order to ensure the safe operation of the lightning protection system, a blade factory can make a series of inspection measures, wherein the resistance of the lightning protection system is detected, and the inspection method becomes an important means for inspecting whether the lightning protection system is effectively protected. And comparing the measured resistance value with a threshold value of the lightning protection system, wherein when the resistance value is within the threshold value range, the lightning protection system is in a normal working state, and when the resistance value is not within the threshold value range, the failure of the lightning protection system can be inferred, and the lightning protection system needs to be repaired.
In the related art, two independent down conductors are often disposed inside the blade, and two ends of the two down conductors are electrically connected to the lightning receptor and the grounding device, respectively. When measuring the resistance value, one end of one of the down leads needs to be detached from the grounding device, so that the two measuring lines of the resistance measuring device are respectively connected to the detached down lead and the undetached down lead, and the resistance value of the two down leads connected in series is measured by the resistance measuring device.
However, the structure of the wind turbine blade described above has problems in that: when the resistance value of the lightning protection system needs to be measured each time, one down lead needs to be detached from the grounding device, and the operation process is complicated and unsafe.
In addition, when measuring the resistance value, need the staff to pass through crane hoist and mount hanging flower basket and carry out the operation at tens meters high altitude, not only consumed a large amount of manpower and materials, also brought very big potential safety hazard in addition.
The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
BRIEF SUMMARY OF THE PRESENT DISCLOSURE
The present disclosure is directed to a wind turbine and a blade thereof, a resistance detection method, a storage medium, and an electronic device, so as to solve the above-mentioned problems of the related art that a resistance measurement process is complicated and unsafe.
In order to achieve the above disclosure purpose, the present disclosure adopts the following technical scheme:
according to an aspect of the present disclosure, there is provided a wind turbine blade comprising a lightning receptor, a down conductor, a grounding device and a measurement cable, the lightning receptor, the down conductor, the grounding device and the measurement cable being connected in series in sequence and forming a closed loop;
the resistance measuring device is arranged in a blade root area of the blade and is respectively and electrically connected with the down lead and the measuring cable to measure the total resistance of the closed loop;
wherein, resistance measurement device with the electric connection department of downlead forms first tie point, resistance measurement device with the electric connection department of measuring cable forms the second tie point, first tie point with the second tie point will closed circuit divide into first half return circuit and second half return circuit, the resistance in first half return circuit is first resistance, the resistance in second half return circuit is second resistance, total resistance equals first resistance with the parallelly connected of second resistance.
According to an embodiment of the present disclosure, the first connection point and the second connection point are located closer to the grounding device than the lightning receptor.
According to an embodiment of the present disclosure, a junction of the down conductor and the grounding device forms the first connection point, and a junction of the measuring cable and the grounding device forms the second connection point.
According to an embodiment of the present disclosure, the insulation device further comprises a first insulation layer, wherein the first insulation layer is arranged to be arranged between the first insulation layer and the first down conductor.
According to an embodiment of the present disclosure, the minimum insulation distance is 5mm to 20 mm.
According to an embodiment of the present disclosure, the cross-sectional area of the down conductor and/or the measuring cable is 25mm2 to 95mm 2.
According to an embodiment of the present disclosure, the cross-sectional areas of the down conductor and the measuring cable are equal.
According to an embodiment of the present disclosure, the insulation means comprises an insulation material comprising at least one of:
thermosetting polymers, thermoplastic polymers or synthetic materials.
According to an embodiment of the present disclosure, the insulating means comprises an insulating material exhibiting a dielectric breakdown field strength of more than 10 kv.
According to an embodiment of the present disclosure, the device further includes a branch line electrically connected to the down conductor, the measurement cable is insulated from the branch line, and the branch line is enclosed in the insulating device.
According to an embodiment of the present disclosure, the lightning protection device further comprises a lightning receiving base, the lightning receiving base is electrically connected to the down conductor, and the measuring cable is insulated from the lightning receiving base.
According to another aspect of the present disclosure, there is provided a wind turbine comprising one or more wind turbine blades according to any of the above.
According to a further aspect of the present disclosure, there is provided a method of testing the safety of a lightning protection system for a wind turbine blade, the wind turbine blade being as defined in any one of the preceding claims, the method comprising:
acquiring a resistance value detected by the resistance measuring device;
comparing the resistance value to a resistance threshold of the closed loop.
According to an embodiment of the present disclosure, the method further comprises:
and if the resistance value is larger than the resistance threshold value, sending an alarm signal to a terminal.
According to an embodiment of the present disclosure, the method further comprises:
and controlling the resistance measuring device to be periodically disconnected from the closed loop.
According to yet another aspect of the disclosure, a storage medium is provided, on which a computer program is stored, which computer program, when executed by a processor, implements the method of any of the above.
According to still another aspect of the present disclosure, there is provided an electronic device including:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform any of the methods described above via execution of the executable instructions.
According to the technical scheme, the wind turbine and the wind turbine blade thereof have the advantages and positive effects that:
according to the wind turbine blade disclosed by the embodiment of the disclosure, the resistance measuring device is arranged in the blade root area of the blade and is electrically connected with the down lead and the measuring cable respectively, and through the structural design, the resistance measuring device can measure the resistance value of a lightning protection system in the wind turbine blade at any time, and the measured down lead does not need to be frequently disassembled and assembled. In addition, the resistance value measured by the method is the total resistance after parallel connection, but not the total resistance after series connection, and when the total resistance is increased due to the fact that the lightning protection system breaks down, the increase range of the total resistance after parallel connection cannot be huge, so that the resistance measuring device is protected.
Drawings
The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1A is a cross-sectional view of a first embodiment of an insulation unit of the present disclosure.
Fig. 1B is a cross-sectional view of a second embodiment of the insulating device of the present disclosure.
Fig. 1C is a cross-sectional view of a third embodiment of an insulation unit of the present disclosure.
Fig. 1D is a cross-sectional view of a fourth embodiment of the insulating device of the present disclosure.
Fig. 2 is a schematic diagram illustrating connection of a down conductor to a branch line according to an exemplary embodiment.
FIG. 3 is a schematic diagram illustrating connection of a down conductor to a blade lightning receptor base, according to an exemplary embodiment.
FIG. 4 is a schematic illustration of a down conductor shown connected to a tip receptor base, according to an exemplary embodiment.
Fig. 5 is a schematic diagram illustrating a down conductor connected to a grounding device according to an exemplary embodiment.
FIG. 6 is a schematic view of a wind turbine blade shown according to an exemplary embodiment.
FIG. 7 is a schematic diagram illustrating a closed loop according to an exemplary embodiment.
Fig. 8 is a schematic diagram of a storage medium shown in accordance with an exemplary embodiment of the present disclosure.
Fig. 9 is a block diagram illustrating an electronic device according to an example embodiment of the present disclosure.
Fig. 10 is a flowchart illustrating a detection method according to an exemplary embodiment of the present disclosure.
Wherein the reference numerals are as follows:
10a, down conductor
10b, measuring cable
101. First connecting point
102. Second connecting point
11. Lightning receptor
12. Resistance measuring device
13. Closed loop
131. First half loop
132. Second half loop
20. Insulating device
21. Insulating layer
30. Branch line
31. Parallel wire clamp
40. Lightning-catching base for blade body
50. Blade tip lightning-receiving base
51. Wire nose
52. Bolt
60. Grounding device
R1, first resistance
R2, second resistance
d. Minimum insulation distance
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," "third," and "fourth," etc. are used merely as labels, and are not limiting as to the number of their objects.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The following describes in detail the structures, connection manners, and functional relationships of the main components of the embodiments of the wind turbine and the wind turbine blade, the detection method, the storage medium, and the electronic device proposed in the present disclosure, with reference to the accompanying drawings, and features in the following embodiments may be combined with each other without conflict.
Wind turbine blade embodiments
The present disclosure provides a wind turbine blade comprising a lightning receptor, a down conductor, a grounding device and a measuring cable, the lightning receptor, the down conductor, the grounding device and the measuring cable being connected in series in sequence and forming a closed loop.
The resistance measuring device is arranged in the blade root area of the blade and is respectively and electrically connected with the down lead and the measuring cable to measure the total resistance of the closed loop.
The resistance measuring device and the electric connection part of the down lead form a first connection point, the resistance measuring device and the electric connection part of the measuring cable form a second connection point, the first connection point and the second connection point divide the closed loop into a first half loop and a second half loop, the resistance of the first half loop is a first resistance, the resistance of the second half loop is a second resistance, and the total resistance is equal to the parallel connection of the first resistance and the second resistance.
According to the wind turbine blade disclosed by the embodiment of the disclosure, the resistance measuring device is arranged in the blade root area of the blade and is electrically connected with the down lead and the measuring cable respectively, and through the structural design, the resistance measuring device can measure the resistance value of a lightning protection system in the wind turbine blade at any time, and the measured down lead does not need to be frequently disassembled and assembled. In addition, the resistance value measured by the method is the total resistance after parallel connection, but not the total resistance after series connection, and when the total resistance is increased due to the fact that the lightning protection system breaks down, the increase range of the total resistance after parallel connection cannot be huge, so that the resistance measuring device is protected.
The following is a description of a specific embodiment.
As shown in fig. 6, the present disclosure provides a wind turbine blade comprising a lightning receptor 11, a down conductor 10a, a grounding device and a measuring cable 10b, the lightning receptor 11, the down conductor 10a, the grounding device and the measuring cable 10b being connected in series in sequence and constituting a closed loop 13. The lightning receptor 11 may be a blade tip lightning receptor 11 or a blade body lightning receptor 11.
The resistance measuring device 12 is arranged in the blade root area of the blade, and the resistance measuring device 12 is electrically connected to the down conductor 10a and the measuring cable 10b respectively and used for measuring the total resistance of the closed loop 13.
The first connection point 101 is formed at the electrical connection position of the resistance measuring device 12 and the down conductor 10a, the second connection point 102 is formed at the electrical connection position of the resistance measuring device 12 and the measuring cable 10b, the first connection point 101 and the second connection point 102 divide the closed loop 13 into a first half loop 131 and a second half loop 132, the resistance of the first half loop 131 is a first resistance, the resistance of the second half loop 132 is a second resistance, and the total resistance is equal to the parallel connection of the first resistance R1 and the second resistance R2.
In some embodiments, the first connection point 101 and the second connection point 102 are located closer to the grounding device than the lightning receptor 11.
In the present embodiment, by providing the first connection point 101 and the second connection point 102 closer to the ground, the measurement line extending from the resistance measurement device 12 can be ensured to be as short as possible, and the probability of lightning striking the resistance measurement device 12 can be reduced.
Of course, to further avoid the possibility of damage to the resistance measuring device 12 by lightning, the resistance measuring device 12 may include a surge protector.
Further, in some embodiments, the connection of the down conductor 10a to the grounding device forms a first connection point 101 and the connection of the measurement cable 10b to the grounding device forms a second connection point 102.
In the present embodiment, as shown in fig. 5, the two measuring lines of the resistance measuring device 12 may be connected to the bolt positions of the grounding device, respectively.
In addition, the inventors of the present disclosure found in their research that the electric field between the two cables increases due to the electric field clustering effect existing between the down conductor 10a and the measuring cable 10b, resulting in a greatly increased probability of being struck by lightning. And, the two cables can cause the problem of insulation breakdown between the cables due to the passing of lightning current.
The wind turbine blade of the present disclosure therefore further comprises an insulation arrangement in which the down conductor 10a and the measuring cable 10b are individually enclosed, defining a minimum insulation distance between the down conductor 10a and the measuring cable 10 b.
As shown in fig. 1A to 1D, schematic views of four different embodiments of the insulation arrangement are shown, respectively. Each cable is enclosed in an insulating device 20 and defines a minimum insulating distance d between two adjacent cables. Because the insulation device 20 is arranged between the two cables and the two cables are separated by the minimum insulation distance d, when lightning current flows in the two cables, the minimum insulation distance d is defined between the two cables by the insulation device 20, so that the insulation breakdown caused by the potential difference between the two cables can be effectively avoided by the insulation device 20, meanwhile, the electric field cluster effect between the two cables is weakened, and the probability that the blade is hit by lightning is obviously reduced.
The two cables can be made of copper, aluminum alloy or other metal conductors.
With continued reference to fig. 1A, in one embodiment, the two cables are enclosed in the insulation device 20 in a semicircular cross-section, and when the down conductor is disposed inside the blade, the bottom surface of the semicircle may be attached to the web of the blade, for example by gluing, to improve the robustness of the down conductor connection.
In some embodiments, as shown in fig. 1B, the cross-sectional view of two cables enclosed in the insulator 20 is an oval.
As shown in fig. 1C, in some embodiments, the cross-sectional view of two cables enclosed in the insulation unit 20 is substantially gourd-shaped.
As shown in fig. 1D, in some embodiments, the cross-sectional view of two cables enclosed in the insulation 20 is circular.
As shown in fig. 1A to 1D, in one embodiment, the minimum insulation distance D between two adjacent cables is 5mm to 20mm, for example, 6mm, 7mm, 8mm, 10mm, 11mm, 15mm, 17mm, 19mm, etc.
Of course, the higher the insulation grade of the insulation material used for the insulation device 20, the shorter the minimum insulation distance d that effectively prevents insulation breakdown between the cables, and the shorter the minimum insulation distance d, the more compact the down conductor 10a and the measuring cable 10b and the less amount of insulation material.
In one embodiment, the cross-sectional area of the cable may be 25mm2To 95mm2Preferably, the cross-sectional area is 50mm2. Further, in one embodiment, each cable has an equal cross-sectional area. When lightning current flows in the cables, the cross sections of the cables are equal, so that the current flowing through the two cables is basically the same, and the potential difference between the two cables does not exist basically, so that the probability of insulation breakdown between the cables is obviously reduced through the design. In addition, the presence of the insulating means 20 between the two cables and the defined minimum insulating distance d allow the electric field crowding effect between the cables to be significantly reduced.
In one embodiment, the insulating device 20 is made of an insulating material comprising at least one of: thermosetting polymers, thermoplastic polymers or synthetic materials. Such as BMC, cross-linked polyethylene, polyurethane, epoxy, and the like.
According to alternative embodiments, the insulating means 20 comprises other insulating materials or compounds. These other insulating materials include ceramic materials, porcelain, glass, plastic, polymeric plastic, rubber, or combinations thereof. In some embodiments, it is beneficial that different insulating materials combine to form a composite material. However, in other embodiments, the insulating means 20 may be formed by several insulating portions, the insulating portions being formed by different insulating materials. In the illustrated embodiment, the insulating means 20 may, for example, comprise a plurality of pieces formed of glass or porcelain, joined by a plastic or rubber material.
In one embodiment, the insulating means 20 comprises an insulating material exhibiting a dielectric breakdown field strength of at least 10kv, such as 12kv, 15kv, 20kv, and the like.
The insulating means 20 comprises an insulating material having a relatively high dielectric breakdown field strength, so that the above-mentioned minimum insulating distance d can be made relatively small, and the amount of insulating material used can be reduced accordingly.
As shown in fig. 2, in an embodiment the wind turbine blade further comprises a branch line 30, the branch line 30 being used for connecting the body receptor and the body receptor base 40. The branch line 30 is electrically connected to the down conductor 10a, the measuring cable 10b is insulated from the branch line 30, and the branch line 30 is enclosed in the insulating device 20. Specifically, the branch line 30 and the down conductor 10a are electrically connected by a parallel clamp 31, such as a C-clamp or an HC-clamp, and the outer peripheries of the branch line 30, the down conductor 10a, and the parallel clamp 31 are covered with the insulating layer 21. The insulating layer 21 can be coated on the periphery by die casting, injection molding, pouring, painting and other processes. The material of the insulating layer 21 may be BMC, cross-linked polyethylene, polyurethane, epoxy, or the like.
As shown in fig. 3, in an embodiment the wind turbine blade further comprises a body lightning receptor base 40, the body lightning receptor base 40 being adapted for connection to a body lightning receptor. The down conductor 10a passes through the blade lightning receiving base 40 and is electrically connected to the blade lightning receiving base 40, the measuring cable 10b is insulated from the blade lightning receiving base 40, and the embedded part of the blade lightning receiving base 40 is enclosed in the insulating device 20.
As shown in fig. 4, in one embodiment, the down conductor 10a and the measurement cable 10b are respectively connected to the tip lightning receptor base 50 through two wire noses 51, and the wire noses 51 are fixed to the tip lightning receptor base 50 through bolts 52.
In addition, the connection area between the embedded part of the blade tip lightning receiving base 50 and the down conductor 10a and the measuring cable 10b is wrapped by the insulating layer 21, so that the electric field clustering effect caused between the cables is prevented.
Of course, in other embodiments, the down conductor 10a and the measuring cable 10b may also be connected to the tip lightning receptor 50 by crimping or connecting terminals, which will not be described in detail herein.
In one embodiment, as shown in fig. 5, two cables are removably connected to the grounding device 60 in the form of bolts 52 and wire noses 51 for resistance measurement.
Of course, in other embodiments, other removable means may be used to connect to the grounding device 60, such as crimping, wire terminals, etc.
Wind turbine embodiments
An embodiment of the present disclosure provides a wind turbine comprising one or more wind turbine blades as described in any of the above.
When the wind turbine disclosed by the invention is used, the resistance measuring device can measure the resistance value of the lightning protection system in the wind turbine blade at any time without frequently disassembling and assembling the measured down conductor. In addition, the resistance value measured by the method is the total resistance after parallel connection, but not the total resistance after series connection, and when the total resistance is increased due to the fact that the lightning protection system breaks down, the increase range of the total resistance after parallel connection cannot be huge, so that the resistance measuring device is protected.
In addition, on the premise of not reducing the reliability of the lightning protection system, the wind turbine runs stably, compared with the wind turbine in the prior art, the wind turbine can effectively reduce the probability of being hit by lightning, and the service life is obviously prolonged.
Method for carrying out the detection
An embodiment of the present disclosure provides a method for detecting the safety of a lightning protection system of a wind turbine blade, which includes a lightning receptor 11, a down conductor 10a, a grounding device and a measuring cable 10b, wherein the lightning receptor 11, the down conductor 10a, the grounding device and the measuring cable 10b are sequentially connected in series to form a closed loop 13. The lightning receptor 11 may be a blade tip lightning receptor 11 or a blade body lightning receptor 11.
The resistance measuring device 12 is arranged in the blade root area of the blade, and the resistance measuring device 12 is electrically connected to the down conductor 10a and the measuring cable 10b respectively and used for measuring the total resistance of the closed loop 13.
The first connection point 101 is formed at the electrical connection position of the resistance measuring device 12 and the down conductor 10a, the second connection point 102 is formed at the electrical connection position of the resistance measuring device 12 and the measuring cable 10b, the first connection point 101 and the second connection point 102 divide the closed loop 13 into a first half loop 131 and a second half loop 132, the resistance of the first half loop 131 is a first resistance, the resistance of the second half loop 132 is a second resistance, and the total resistance is equal to the parallel connection of the first resistance R1 and the second resistance R2.
The method for detecting the safety of the lightning protection system of the wind turbine blade comprises the following steps:
step S910: acquiring a resistance value detected by the resistance measuring device;
step S920: comparing the resistance value to a resistance threshold of the closed loop.
In the embodiment of the disclosure, a system database may be established in advance, the database stores the resistance threshold of the closed loop, and after the resistance value detected by the resistance measuring device is obtained, the resistance value is compared with the resistance threshold, so as to determine whether the lightning protection system of the wind turbine blade is in a safe and effective state.
In an embodiment, the method further comprises: and if the resistance value is larger than the resistance threshold value, sending an alarm signal to a terminal.
In the embodiment of the present disclosure, the resistance value detected by the resistance measuring device 12 is the resistance value of the first half-loop 131 and the second half-loop 132, i.e. the parallel connection of the first resistor R1 and the second resistor R2. When the resistance value is larger than the resistance threshold value, namely a problem of a closed loop in the lightning protection system of the wind turbine blade is explained, an alarm signal is sent to a terminal.
In another embodiment, the terminal may be a mobile phone, a tablet computer, a wearable device, an in-vehicle device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), and the like, and the specific type of the terminal is not limited in this embodiment.
In an exemplary embodiment, the method further comprises: and controlling the resistance measuring device to be periodically disconnected from the closed loop.
In the embodiment of the disclosure, the connection or disconnection of the resistance measuring device and the closed loop is controlled by setting the detection period of the resistance measuring device. In actual operation, the resistance measuring device may be configured to be in a silent state or an operating state in which the resistance measuring device measures the resistance of the closed loop, without always obtaining the resistance value of the resistance measuring device. By the mode, the resistance measuring device is prevented from being damaged by thunder, and electric energy is saved.
Storage medium implementation
In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the disclosure described in the "exemplary methods" section above of this specification, when the program product is run on the terminal device.
Referring to fig. 8, a program product 1000 for implementing the above method according to an embodiment of the present disclosure is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Electronic device embodiments
As will be appreciated by one skilled in the art, aspects of the present disclosure may be embodied as a system, method or program product. Accordingly, various aspects of the present disclosure may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 1100 according to this embodiment of the disclosure is described below with reference to fig. 9. The electronic device 1100 shown in fig. 9 is only an example and should not bring any limitations to the functionality and scope of use of the embodiments of the present disclosure.
As shown in fig. 9, the electronic device 1100 is embodied in the form of a general purpose computing device. The components of the electronic device 1100 may include, but are not limited to: the at least one processing unit 1110, the at least one memory unit 1120, a bus 1130 connecting different system components (including the memory unit 1120 and the processing unit 1110), and a display unit 1140.
Wherein the storage unit stores program code that is executable by the processing unit 1110 to cause the processing unit 1110 to perform steps according to various exemplary embodiments of the present disclosure as described in the above section "exemplary methods" of this specification. For example, the processing unit 1110 may perform step S910 as shown in fig. 10: acquiring a resistance value detected by the resistance measuring device; step S920: comparing the resistance value to a resistance threshold of the closed loop.
The storage unit 1120 may include a readable medium in the form of a volatile memory unit, such as a random access memory unit (RAM)11201 and/or a cache memory unit 11202, and may further include a read only memory unit (ROM) 11203.
The electronic device 1100 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1100, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 1100 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 1150. Also, the electronic device 1100 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the internet) via the network adapter 1160. As shown, the network adapter 1160 communicates with the other modules of the electronic device 1100 over the bus 1130. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 1100, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
It should be noted herein that the wind turbine and wind turbine blades thereof shown in the drawings and described herein are merely one example of the principles that may be employed using the present disclosure. It should be clearly understood by those skilled in the art that the principles of the present disclosure are not limited to any of the details or any of the components of the apparatus shown in the drawings or described in the specification.
In summary, the advantages and benefits of the wind turbine and wind turbine blades thereof of the present disclosure are:
according to the wind turbine blade disclosed by the embodiment of the disclosure, the resistance measuring device is arranged in the blade root area of the blade and is electrically connected with the down lead and the measuring cable respectively, and through the structural design, the resistance measuring device can measure the resistance value of a lightning protection system in the wind turbine blade at any time, and the measured down lead does not need to be frequently disassembled and assembled. In addition, the resistance value measured by the method is the total resistance after parallel connection, but not the total resistance after series connection, and when the total resistance is increased due to the fact that the lightning protection system breaks down, the increase range of the total resistance after parallel connection cannot be huge, so that the resistance measuring device is protected.
It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments described in this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.
Claims (11)
1. A wind turbine blade comprising a lightning receptor, a down conductor, a grounding device and a measuring cable, the lightning receptor, the down conductor, the grounding device and the measuring cable being connected in series in sequence and forming a closed loop;
the resistance measuring device is arranged in a blade root area of the blade and is respectively and electrically connected with the down lead and the measuring cable to measure the total resistance of the closed loop;
wherein, resistance measurement device with the electric connection department of downlead forms first tie point, resistance measurement device with the electric connection department of measuring cable forms the second tie point, first tie point with the second tie point will closed circuit divide into first half return circuit and second half return circuit, the resistance in first half return circuit is first resistance, the resistance in second half return circuit is second resistance, total resistance equals first resistance with the parallelly connected of second resistance.
2. A wind turbine blade according to claim 1, wherein the first connection point and the second connection point are located closer to the grounding means than the lightning receptor.
3. A wind turbine blade according to claim 2, wherein the connection of the down conductor to the earthing device forms the first connection point and the connection of the measuring cable to the earthing device forms the second connection point.
4. A wind turbine blade according to any of claims 1 to 3, further comprising insulation means in which the down conductor and the measurement cable are individually enclosed, defining a minimum insulation distance between the down conductor and the measurement cable.
5. A wind turbine blade according to claim 4,
the minimum insulation distance is 5mm to 20 mm; or the like, or, alternatively,
the cross-sectional area of the down conductor and/or the measuring cable is 25mm2To 95mm2(ii) a Or the like, or, alternatively,
the cross sections of the down conductor and the measuring cable are equal; or the like, or, alternatively,
the insulating means comprises an insulating material comprising at least one of: a thermoset polymer, thermoplastic polymer, or synthetic material; or the like, or, alternatively,
the insulating means comprises an insulating material exhibiting a dielectric breakdown field strength greater than 10 kv; or the like, or, alternatively,
the measuring cable is insulated from the branch line, and the branch line is enclosed in the insulating device; or the like, or, alternatively,
still include the blade and connect the sudden strain of a muscle base, blade connect the sudden strain of a muscle base electricity connect in the downlead, measuring cable with the blade connects the sudden strain of a muscle base is insulating.
6. A wind turbine comprising one or more wind turbine blades according to any of claims 1 to 5.
7. A method of testing the safety of a lightning protection system of a wind turbine blade, wherein the wind turbine blade is a wind turbine blade according to any of claims 1 to 5, the method comprising:
acquiring a resistance value detected by the resistance measuring device;
comparing the resistance value to a resistance threshold of the closed loop.
8. The method of testing the safety of a lightning protection system for a wind turbine blade according to claim 7, further comprising:
and if the resistance value is larger than the resistance threshold value, sending an alarm signal to a terminal.
9. The method of testing the safety of a lightning protection system for a wind turbine blade according to claim 7, further comprising:
and controlling the resistance measuring device to be periodically disconnected from the closed loop.
10. A storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of any of claims 7 to 9.
11. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the method of any of claims 7 to 9 via execution of the executable instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910708147.9A CN112302884A (en) | 2019-08-01 | 2019-08-01 | Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910708147.9A CN112302884A (en) | 2019-08-01 | 2019-08-01 | Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112302884A true CN112302884A (en) | 2021-02-02 |
Family
ID=74486418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910708147.9A Pending CN112302884A (en) | 2019-08-01 | 2019-08-01 | Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112302884A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1944848A1 (en) * | 2007-01-12 | 2008-07-16 | ABB France | Device and method of measuring lightning currents |
| CN102411093A (en) * | 2010-08-20 | 2012-04-11 | 西门子公司 | Measuring system for down conductor of wind turbine blade |
| CN203084106U (en) * | 2012-12-27 | 2013-07-24 | 上海玻璃钢研究院有限公司 | Device for detecting lightning protection system of wind turbine blade |
| CN203925890U (en) * | 2014-07-03 | 2014-11-05 | 龙源（北京）风电工程技术有限公司 | A kind of blade with loop-type ground wire |
| CN206892226U (en) * | 2017-07-13 | 2018-01-16 | 北京普华亿能风电技术有限公司 | A kind of blower fan lightning protection test device |
| CN108414835A (en) * | 2018-02-28 | 2018-08-17 | 江苏金风科技有限公司 | The electric resistance measuring apparatus and resistance measurement method of blade lightning-protection system |
| CN208298582U (en) * | 2017-12-19 | 2018-12-28 | 特变电工股份有限公司 | A kind of wind power plant presses lightning protection water conservancy diversion pre-branched cable in using |
| CN208705404U (en) * | 2018-08-31 | 2019-04-05 | 江苏金风科技有限公司 | Wind power generating set earth resistance metering device and wind power generating set |
| JP2019056572A (en) * | 2017-09-20 | 2019-04-11 | 東日本旅客鉄道株式会社 | Cable insulation monitoring device |
| CN210622993U (en) * | 2019-08-01 | 2020-05-26 | 中材科技风电叶片股份有限公司 | Wind turbine and blade thereof |
-
2019
- 2019-08-01 CN CN201910708147.9A patent/CN112302884A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1944848A1 (en) * | 2007-01-12 | 2008-07-16 | ABB France | Device and method of measuring lightning currents |
| CN102411093A (en) * | 2010-08-20 | 2012-04-11 | 西门子公司 | Measuring system for down conductor of wind turbine blade |
| CN203084106U (en) * | 2012-12-27 | 2013-07-24 | 上海玻璃钢研究院有限公司 | Device for detecting lightning protection system of wind turbine blade |
| CN203925890U (en) * | 2014-07-03 | 2014-11-05 | 龙源（北京）风电工程技术有限公司 | A kind of blade with loop-type ground wire |
| CN206892226U (en) * | 2017-07-13 | 2018-01-16 | 北京普华亿能风电技术有限公司 | A kind of blower fan lightning protection test device |
| JP2019056572A (en) * | 2017-09-20 | 2019-04-11 | 東日本旅客鉄道株式会社 | Cable insulation monitoring device |
| CN208298582U (en) * | 2017-12-19 | 2018-12-28 | 特变电工股份有限公司 | A kind of wind power plant presses lightning protection water conservancy diversion pre-branched cable in using |
| CN108414835A (en) * | 2018-02-28 | 2018-08-17 | 江苏金风科技有限公司 | The electric resistance measuring apparatus and resistance measurement method of blade lightning-protection system |
| CN208705404U (en) * | 2018-08-31 | 2019-04-05 | 江苏金风科技有限公司 | Wind power generating set earth resistance metering device and wind power generating set |
| CN210622993U (en) * | 2019-08-01 | 2020-05-26 | 中材科技风电叶片股份有限公司 | Wind turbine and blade thereof |
Non-Patent Citations (1)
| Title |
|---|
| 罗玉贵, 方江屏: "超量程电阻的测量", 工业计量, no. 01, 10 February 1996 (1996-02-10), pages 36 - 37 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109216130A (en) | A kind of fuse apparatus | |
| CN210622993U (en) | Wind turbine and blade thereof | |
| CN109462053A (en) | A kind of novel grounded line apparatus for aerial insulated wire | |
| CN103267934A (en) | Portable direct current test discharging rod | |
| CN102227077A (en) | Tower arrangement structure at cable terminal | |
| CN105609190A (en) | High-voltage power transmission cable | |
| CN112302884A (en) | Wind turbine and blade thereof, resistance detection method, storage medium and electronic equipment | |
| CN206301645U (en) | A kind of Spliced type insulating sleeve | |
| CN115656683A (en) | Cable operation monitoring method, system, terminal equipment and storage medium | |
| CN214671921U (en) | Cross-linked polyethylene insulated direct-current cable for urban light rail subway | |
| CN107499755A (en) | A kind of middle low frequency diverter for floating roof tank | |
| CN206670827U (en) | A kind of compound Metro Cable on-line monitoring system of optical fiber | |
| CN203871092U (en) | Novel sheath structure for improving insulating property of overhead bare conductor | |
| CN208298582U (en) | A kind of wind power plant presses lightning protection water conservancy diversion pre-branched cable in using | |
| CN203287474U (en) | Portable-type direct-current test discharge rod | |
| CN206670828U (en) | A kind of intelligent cable on-line monitoring system | |
| CN202004400U (en) | Cable terminal support arrangement structure | |
| CN201877150U (en) | Prefabricated branch cable | |
| CN207868777U (en) | A kind of steel tower lightning proof | |
| CN220913994U (en) | Zinc oxide lightning arrester | |
| Jaidka et al. | Underground cable fault detector using Arduino | |
| CN207704940U (en) | A kind of subway optical fiber composite intelligent cable | |
| CN205231295U (en) | High voltage insulation protective wire for load switch | |
| RU48432U1 (en) | POWER SUPPLY FLEXIBILITY CABLE | |
| CN207704877U (en) | A kind of compound Metro Cable of optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |