Lightning protection device for photovoltaic station

Abstract

The utility model relates to the technical field of photovoltaic station lightning protection, in particular to a photovoltaic station lightning protection device, which comprises a floating balloon, a grounding lead, a lightning receiving unit and a traction rope. The lightning arresting unit is arranged on the outer surface of the floating balloon, one end of the grounding wire is connected with the lightning arresting unit, and the other end of the grounding wire is grounded; one end of the traction rope is connected with the floating balloon, and the other end of the traction rope is connected with the ground; the lightning arresting unit is arranged on the floating balloon, and the lightning arresting unit is grounded through the grounding lead, so that the lightning protection effect is realized; meanwhile, the floating balloon is connected with the ground through the pulling rope, so that the connecting position of the pulling rope and the ground is adjusted according to the lightning activity range, it is guaranteed that the lightning arresting unit can capture lightning more effectively and reliably, and the lightning protection requirement of a photovoltaic station is met.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection technology for photovoltaic power plants, and specifically to a lightning protection device for photovoltaic power plants. Background Technology

[0002] The main parts of photovoltaic power stations are installed in the open air and cover a large area. The components and supports are conductors, which are highly attractive to lightning. Therefore, they are susceptible to direct and indirect lightning strikes. In order to reduce the damage of lightning strikes to photovoltaic power generation systems, it is necessary to install lightning protection grounding devices.

[0003] In existing lightning protection technology systems, passive lightning protection strategies are commonly used. The core of this strategy is to install lightning rods, surge arresters, and other lightning protection devices in areas with frequent lightning activity or severe lightning damage.

[0004] For example, Chinese utility model patent application number 202322758604.X provides a lightning protection device for photovoltaic power stations. The lightning protection device is installed on the side of the photovoltaic module. When lightning strikes the lightning rod, it can disperse the current to the ground.

[0005] However, this one-time investment and long-term operation model results in a significant lack of specificity and flexibility in lightning protection measures. Because the installation locations of lightning protection devices are fixed and cannot be adjusted according to real-time lightning activity, these devices may be idle during periods of weaker lightning activity, leading to a waste of resources.

[0006] Lightning activity is highly random and uncertain in its timing, generally occurring only within a very limited timeframe. Therefore, fixed, long-term lightning protection devices are largely incompatible with this characteristic of lightning activity, resulting in inadequate lightning protection performance to meet practical needs. Utility Model Content

[0007] The purpose of this invention is to provide a lightning protection device for photovoltaic power plants, which solves the technical problem of poor lightning protection effect of current fixed-installation lightning protection devices for photovoltaic power plants.

[0008] The solution of this utility model to the above-mentioned technical problems is as follows:

[0009] A lightning protection device for a photovoltaic power station includes a floating balloon, a grounding wire, a lightning arresting unit, and a traction rope;

[0010] The lightning receiving unit is installed on the outer surface of the floating balloon. One end of the grounding wire is connected to the lightning receiving unit, and the other end of the grounding wire is grounded. One end of the traction rope is connected to the floating balloon, and the other end of the traction rope is connected to the ground.

[0011] Further defined, the lightning receiving unit includes multiple lightning receiving plates and multiple lightning receiving copper wires. The lightning receiving copper wires are attached to the outer surface of the floating balloon. The multiple lightning receiving copper wires are arranged circumferentially around the axis of the floating balloon. The lightning receiving plates are spaced apart along the length of the lightning receiving copper wires and are located between the floating balloon and the lightning receiving copper wires. The grounding wire is connected to the lightning receiving copper wires.

[0012] Furthermore, the number of the lightning-absorbing copper wires is eight.

[0013] Furthermore, the lightning-absorbing copper wires are arranged at equal intervals around the axis of the floating balloon.

[0014] Further specified, the lightning-receiving plates are arranged at equal intervals along the length of the lightning-receiving copper wire, and the interval between two adjacent lightning-receiving plates is 10 cm to 20 cm.

[0015] Furthermore, the photovoltaic power station lightning protection device also includes a compressed gas storage tank, which is connected to a floating balloon via an inflation pipe.

[0016] Furthermore, the inflation pipe, grounding wire, and traction rope are all connected by cable ties.

[0017] Furthermore, the photovoltaic power station lightning protection device also includes a fixed weight, and the other end of the traction rope is connected to the fixed weight.

[0018] Further specifying, the height of the floating balloon is 15m to 20m.

[0019] Furthermore, the floating balloon is a helium balloon.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model utilizes lightning arresting units deployed on floating balloons, and grounding the lightning arresting units through grounding wires to achieve lightning protection. At the same time, the floating balloons are connected to the ground by traction ropes, so the connection position of the traction ropes to the ground can be adjusted according to the lightning activity range to ensure that the lightning arresting units can capture lightning more effectively and reliably, thereby meeting the lightning protection requirements of photovoltaic power stations.

[0022] 2. This utility model utilizes a traction rope to adjust the floating height of the floating balloon according to lightning activity, and also uses a fixed weight to stabilize it at different positions on the ground, making position adjustment simple. At the same time, the compressed air storage tank can replenish the floating balloon with air, improving its ability to stay airborne under different environmental and temperature conditions, thus ensuring lightning protection effectiveness. Attached Figure Description

[0023] Figure 1This is a structural diagram of the photovoltaic power station lightning protection device of this utility model;

[0024] Figure 2 This is a top view of the photovoltaic power station lightning protection device of this utility model;

[0025] In the diagram, 10-floating balloon; 20-grounding wire; 30-lightning receiver unit; 31-lightning receiver plate; 32-lightning receiver copper wire; 40-traction rope; 50-fixed counterweight; 60-compressed gas storage tank; 61-inflation pipe; 70-cable tie. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Example 1

[0031] refer to Figure 1This utility model provides a lightning protection device for photovoltaic power stations, including a floating balloon 10, a grounding wire 20, a lightning interception unit 30, and a traction rope 40. The lightning interception unit 30 is disposed on the outer surface of the floating balloon 10 and is used to capture and conduct lightning. One end of the grounding wire 20 is connected to the lightning interception unit 30, and the other end of the grounding wire 20 is grounded. The grounding wire 20 is used to conduct the lightning captured by the lightning interception unit 30 to the ground, thus meeting the lightning protection requirements. In order to control the floating height and the moving distance of the floating balloon 10, a traction rope 40 of a set length is used to connect the floating balloon 10 to the ground as needed. The connection position of the traction rope 40 to the ground can be adjusted and changed according to the real-time situation of lightning activity to improve the lightning protection effect and meet the actual lightning protection requirements. At the same time, the overall structure is simple, the cost is low, and it is suitable for widespread use.

[0032] Both the grounding wire 20 and the lightning arrester unit 30 can be made of conductive materials such as copper, silver or aluminum. To ensure conductivity and save costs, copper is preferred.

[0033] The number of towing ropes 40 can be one or three. When the number of towing ropes 40 is three, the three towing ropes 40 are indirectly set around the vertical axis of the floating balloon 10, thereby limiting the floating range of the floating balloon 10 and preventing the floating balloon 10 from being affected by surrounding obstacles and reducing the lightning protection effect.

[0034] Typically, photovoltaic power stations are located in open areas to avoid obstruction from buildings, trees, or other obstacles, so it is preferable to use only one traction rope (40).

[0035] To further explain, the traction rope 40 can be connected to the ground via ground spikes, and the connection position of the traction rope 40 to the ground can be adjusted according to the area of ​​lightning activity.

[0036] To further improve the ease of connection and reliability of the traction rope 40, the preferred photovoltaic power station lightning protection device also includes a fixed weight 50. The traction rope 40 is connected to the fixed weight 50. The weight of the fixed weight 50 needs to be greater than the buoyancy of the floating balloon 10 to ensure that the floating balloon 10 can move around the position of the fixed weight 50.

[0037] To further explain, in order to ensure the safety of lightning protection, the floating balloon 10 is preferably a helium balloon; the volume of the floating balloon 10 can be determined according to the weight of the lightning protection unit 30, the weight of the traction rope 40, the weight of the inflation pipe 61 and the weight of the grounding wire 20 on the floating balloon 10.

[0038] For example, under standard atmospheric pressure, the density of helium is approximately 0.1786 kg / m³, and the density of air is approximately 1.293 kg / m³. Therefore, the net buoyancy that each cubic meter of helium can provide is: 1.293 kg - 0.1786 kg = 1.1144 kg. Assuming the total weight of the equipment connected to the floating balloon 10 is 10 kg, at least a helium balloon volume of approximately 9 m³ is required. At the same time, in order to ensure the stability of the balloon under different environmental conditions, it is necessary to make corrections according to a safety factor. The safety factor is taken as 1.5, and the actual volume required for the floating balloon 10 is approximately: 9 m³ × 1.5 = 13.5 m³.

[0039] To further explain, the lightning receiving unit 30 includes multiple lightning receiving plates 31 and multiple lightning receiving copper wires 32; wherein, the lightning receiving copper wires 32 are bent in an arc shape according to the outer surface of the inflated floating balloon 10, and the number of lightning receiving copper wires 32 is not less than two, preferably not less than three.

[0040] Each lightning-absorbing copper wire 32 is arranged circumferentially around the axis of the floating balloon 10. This axis passes through the center of the floating balloon 10 in a vertical direction. Preferably, the included angle between two adjacent lightning-absorbing copper wires 32 is the same, that is, multiple lightning-absorbing copper wires 32 are arranged circumferentially at equal intervals. Taking eight lightning-absorbing copper wires 32 as an example, the included angle between two adjacent lightning-absorbing copper wires 32 is 45°. One end of each lightning-absorbing copper wire 32 is connected at the top of the floating balloon 10, and the other end of each lightning-absorbing copper wire 32 is connected to the grounding wire 20 at the bottom of the floating balloon 10.

[0041] refer to Figure 2 To further reduce structural complexity, it is preferable that when the number of lightning-absorbing copper wires 32 is even, the two lightning-absorbing copper wires 32 with an included angle of 180° are integrated into one piece, avoiding the connection of the lightning-absorbing copper wires 32 at the top of the floating balloon 10, thereby improving structural reliability and service life.

[0042] The lightning receiver 31 is attached to the outer surface of the floating balloon 10 by means of adhesive. Preferably, the lightning receiver 31 is arranged sequentially at intervals along the length of the lightning receiver copper wire 32, or evenly arranged at intervals of 10cm to 20cm, preferably 15cm.

[0043] The lightning arrester 31 is connected between the floating balloon 10 and the lightning arrester copper wire 32. The lightning arrester 31 and the floating balloon 10 can be connected by bonding or welding. After the lightning arrester 31 captures lightning, it can conduct the current to the grounding wire 20, thereby achieving effective lightning protection and ensuring the safety of photovoltaic power station equipment.

[0044] By evenly distributing multiple lightning-absorbing copper wires 32, the captured lightning is dispersed evenly, reducing the current flowing through a single lightning-absorbing copper wire 32, increasing its service life, ensuring safe and reliable lightning protection, and meeting actual lightning protection needs.

[0045] To further explain, in order to directly move the installation position of the photovoltaic power station lightning protection device according to the lightning protection requirements and ensure the long-term hovering capability of the floating balloon 10, the photovoltaic power station lightning protection device preferably also includes a compressed gas storage tank 60. The compressed gas storage tank 60 is selected as a compressed helium gas storage tank, and the gas outlet of the compressed gas storage tank 60 is connected to the floating balloon 10 through an inflation pipe 61.

[0046] In practical use, the floating balloon 10 is replenished with air via the compressed air storage tank 60 to ensure its floating height. The effective coverage area of ​​the floating balloon 10 is closely related to its floating height. Generally, the higher the floating height, the larger the protection range of the lightning arresting unit 30, but the stability of the balloon and the influence of wind must also be considered. Therefore, the floating height can be set between 15m and 20m, which can effectively capture lightning while avoiding the influence of excessively high winds. In practical use, the height of the floating balloon 10 can also be changed by adjusting the length of the traction rope 40.

[0047] In actual use, it is preferable to use cable ties 70 to bind the inflation pipe 61, grounding wire 20 and traction rope 40 to avoid knots or collisions, improve their service life, and ensure the safety and reliability of lightning protection; there are multiple cable ties 70, which are spaced apart along the length of the traction rope 40.

[0048] Example 2

[0049] Based on the photovoltaic power station lightning protection device provided in Embodiment 1, this embodiment provides a photovoltaic power station lightning protection method, including the following steps:

[0050] S1. Assemble lightning protection devices for photovoltaic power stations;

[0051] S2. The assembled photovoltaic power station lightning protection device is set in the middle of the photovoltaic power station or at the highest point of the photovoltaic power station by fixing the weight 50, and then the grounding wire 20 is grounded.

[0052] S3. Open the compressed air storage tank 60 and inflate the floating balloon 10 through the inflation pipe 61 until the floating balloon 10 rises to the set height;

[0053] S4. Determine whether the floating balloon 10 needs to be refilled with air. If yes, open the compressed air storage tank 60 and refill the floating balloon 10 with air through the inflation pipe 61. If no, keep the compressed air storage tank 60 closed.

[0054] Specifically, determining whether the floating balloon 10 needs to be inflated involves:

[0055] Observe whether the traction rope 40 is dragging on the ground. If so, the floating balloon 10 needs to be inflated; if not, it does not need to be inflated. Therefore, inspections can be carried out under good weather conditions. When the traction rope 40 is dragging on the ground, open the compressed air storage tank 60 and inflate the floating balloon 10 until the traction rope 40 is taut.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lightning protection device for a photovoltaic plant, characterized in that it comprises: The lightning protection device for the photovoltaic station comprises a floating balloon (10), a grounding wire (20), a lightning receiving unit (30) and a traction rope (40). The lightning receiving unit (30) is arranged on the outer surface of the floating balloon (10), one end of the grounding wire (20) is connected with the lightning receiving unit (30), and the other end of the grounding wire (20) is grounded; one end of the traction rope (40) is connected with the floating balloon (10), and the other end of the traction rope (40) is connected with the ground.

2. The lightning protection device for a photovoltaic plant according to claim 1, characterized in that, The lightning receiving unit (30) comprises a plurality of lightning receiving sheets (31) and a plurality of lightning receiving copper wires (32), the lightning receiving copper wires (32) are attached to the outer surface of the floating balloon (10), the plurality of lightning receiving copper wires (32) are arranged around the axis of the floating balloon (10) in a circle, the lightning receiving sheets (31) are arranged at intervals along the length direction of the lightning receiving copper wires (32), and the lightning receiving sheets (31) are arranged between the floating balloon (10) and the lightning receiving copper wires (32); the grounding wire (20) is connected with the lightning receiving copper wires (32).

3. The lightning protection device for a photovoltaic plant according to claim 2, characterized in that, The number of the lightning receiving copper wires (32) is eight.

4. The lightning protection device for a photovoltaic plant according to claim 2, characterized in that, The lightning receiving copper wires (32) are arranged at equal intervals around the axis of the floating balloon (10).

5. The lightning protection device for a photovoltaic plant according to claim 2, characterized in that, The lightning receiving sheets (31) are arranged at equal intervals along the length direction of the lightning receiving copper wires (32), and the interval between two adjacent lightning receiving sheets (31) is 10 cm-20 cm.

6. The lightning protection device for a photovoltaic plant according to claim 4, characterized in that, The lightning protection device for the photovoltaic station further comprises a compressed gas storage tank (60), and the compressed gas storage tank (60) is communicated with the floating balloon (10) through an inflation pipeline (61).

7. The lightning protection device for a photovoltaic plant according to claim 6, characterized in that, The inflation pipeline (61), the grounding wire (20) and the traction rope (40) are connected by a cable tie (70).

8. The lightning protection device for a photovoltaic plant according to claim 7, characterized in that, The lightning protection device for the photovoltaic station further comprises a fixed weight (50), and the other end of the traction rope (40) is connected with the fixed weight (50).

9. The lightning protection device for a photovoltaic field station according to claim 7, characterized in that, The height of the floating balloon (10) is 15 m-20 m.

10. The lightning protection device for a photovoltaic farm according to claim 7, characterized in that, The floating balloon (10) is a helium balloon.

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