Lightning protection device for photovoltaic equipment

Abstract

The utility model relates to the field of photovoltaic equipment protection device design, in particular to a photovoltaic equipment lightning protection device, which comprises a mounting plate, a base, a fixing bolt, a connecting wire and a reinforcing assembly, the base is arranged in the middle of the top of the mounting plate, and a plurality of wiring ports are formed in the lower part of the base along the circumferential direction; the upper portion of each wiring port is connected with a fixing bolt in a threaded penetrating mode, the lower portion and the middle of the base are communicated with a plurality of connecting wires corresponding to the wiring ports in number in the circumferential direction, the lower ends of the connecting wires are close to the wiring ports, and a reinforcing assembly is arranged at the top of the base. The photovoltaic module frame metal parts are connected through the wiring ports distributed in the circumferential direction of the base and the fixing bolts, a distributed lightning receiving network is formed through an original support of a photovoltaic array, and compared with a traditional single-point lightning arrester, the lightning interception coverage area is increased; the lightning rod body and the exciter reduce the lightning field intensity threshold and shorten the lightning receiving response time.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic equipment protection device design, and in particular to a photovoltaic equipment lightning protection device. Background Technology

[0002] Lightning protection for photovoltaic (PV) equipment refers to the implementation of lightning protection measures for the components, lines, and electrical equipment of a PV power generation system through technical means. This includes a comprehensive protection system encompassing external lightning protection (lightning arresters, down conductors, grounding devices) and internal lightning protection (surge protectors, equipotential bonding). The goal of PV equipment lightning protection is to prevent lightning current from directly breaking down PV modules or generating overvoltage through electromagnetic induction, leading to physical damage such as equipment burnout and line melting. It also aims to prevent lightning energy from entering critical equipment such as inverters and combiner boxes along cables, ensuring continuous and stable power generation of the system.

[0003] Existing technologies generally adopt the traditional lightning protection architecture of centralized lightning rods combined with grounding grids, which relies on single-point lightning rods to intercept lightning. However, photovoltaic arrays occupy a large area and the components are widely distributed, and a single lightning interception point is difficult to cover the edge area of ​​the components, which increases the probability of lightning bypass and results in low lightning interception efficiency. In addition, conventional lightning rods rely on passive lightning attraction, and the uplink leader can only be triggered when the electric field strength of the thundercloud reaches a high threshold.

[0004] Therefore, it is necessary to design a lightning protection device for photovoltaic equipment. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a lightning protection device for photovoltaic equipment.

[0006] A lightning protection device for photovoltaic equipment includes a mounting plate, a base, fixing bolts, connecting wires, a reinforcing component, a lightning rod body, an exciter, a lightning rod base, a fixing screw, and a grounding wire. The mounting plate has a base located at the top center. Multiple wiring ports are circumferentially opened at the bottom of the base, and each wiring port is threaded through with a fixing bolt. Multiple connecting wires, corresponding to the number of wiring ports, are circumferentially connected to the bottom and middle of the base, with the lower ends of the connecting wires close to the wiring ports. A reinforcing component is located at the top of the base, and a lightning rod base abuts against the reinforcing component. The lightning rod body is threadedly connected to the top of the lightning rod base. An exciter is installed on the upper part of the lightning rod body, and a fixing screw is located at the bottom of the lightning rod body. The fixing screw is threadedly connected to the top of the lightning rod base. A grounding wire is connected to one side of the lower part of the base.

[0007] In a preferred embodiment of this utility model, the reinforcement component includes clamping plates and bidirectional screws. The clamping plates are slidably connected to both sides of the upper part of the base, and the bidirectional screws are threaded through one side of the top of the base. The bidirectional screws are threadedly connected to the inner sides of the two clamping plates, and both clamping plates are in contact with the outside of the lightning rod base.

[0008] In a preferred embodiment of the present invention, the end of the clamp near the lightning rod base is protruding, and the clamp is made of a deformable elastic material.

[0009] In a preferred embodiment of the present invention, an alarm is also included, which is installed on the lower part of the base near the grounding wire.

[0010] In a preferred embodiment of this utility model, a counter is also included, with the counter installed on one side of the lower part of the base.

[0011] In a preferred embodiment of the present invention, an insulating rubber pad is also included, and an insulating rubber pad is connected to the bottom of the mounting plate.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model connects the metal parts of the photovoltaic module frame through the wiring ports distributed around the base and the fixing bolts, and forms a distributed lightning interception network using the original support of the photovoltaic array. Compared with the traditional single-point lightning protection device, it increases the lightning interception coverage area; the lightning rod body and the exciter reduce the threshold of the lightning electric field strength and shorten the lightning response time; the fixing screw is threaded to the lightning rod seat to form axial fixation, and with the lateral clamping force of the reinforcement component, the wind sway under lightning impact is reduced.

[0013] 2. This utility model applies symmetrical clamping force to the lightning rod base by driving the clamping plate with a bidirectional screw. The protruding end of the clamping plate is embedded in the lightning rod base, forming a mechanical self-locking mechanism, which reduces the verticality deviation after a lightning strike.

[0014] 3. This utility model records the number of pulse currents passing through the grounding wire in real time through a counter. When the energy of a single lightning strike exceeds the threshold, it prompts an inspection of the corrosion status of the grounding body. The alarm continuously monitors the potential difference between the base and the mounting plate. If the aging of the insulating rubber pad causes leakage current, the alarm will be activated to trigger an audible and visual alarm. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the mounting plate, base, and wiring port of this utility model.

[0017] Figure 3 This is a partial sectional view of the components of this utility model, including the clamp, lightning rod body base, and grounding wire.

[0018] Figure 4 This is a structural schematic diagram of the lightning rod body, activator, and fixing screw of this utility model.

[0019] The above-mentioned attached drawings include the following reference numerals: 1_mounting plate, 101_insulating pad, 2_base, 3_connection port, 4_fixing bolt, 5_connecting wire, 6_lightning rod body, 7_exciter, 8_lightning rod base, 801_fixing screw, 9_grounding wire, 10_clamping plate, 11_bidirectional screw, 12_alarm, 13_counter. Detailed Implementation

[0020] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0021] Example: A lightning protection device for photovoltaic equipment, such as Figures 1-4 As shown, the system includes a mounting plate 1, a base 2, fixing bolts 4, connecting wires 5, reinforcing components, a lightning rod body 6, an exciter 7, a lightning rod base 8, fixing screws 801, and a grounding wire 9. The mounting plate 1 serves as the basic support structure for the lightning protection device. A base 2 is located at the top center of the mounting plate 1. Multiple wiring ports 3 are circumferentially opened at the bottom of the base 2. Each wiring port 3 is threaded through and connected to a fixing bolt 4. Multiple connecting wires 5, corresponding to the number of wiring ports 3, are connected circumferentially at the bottom and middle of the base 2. The connecting wires 5 are made of copper-clad aluminum stranded wire, which diverts the lightning current from the photovoltaic module frame to multiple paths. The base 2 prevents local overload. The lower end of the connecting wire 5 is close to the wiring port 3. The top of the base 2 is equipped with a reinforcing component, and the lightning rod seat 8 is abutted on the reinforcing component. The lightning rod body 6 is threadedly connected to the top of the lightning rod seat 8. An exciter 7 is installed on the upper part of the lightning rod body 6. The exciter 7 actively attracts lightning and shortens the lightning response time. The bottom of the lightning rod body 6 is equipped with a fixing screw 801, which is connected to the threaded connection at the top of the lightning rod seat 8. A grounding wire 9 is connected to one side of the lower part of the base 2. The grounding wire 9 discharges the lightning current to the grid grounding system. It uses galvanized steel stranded wire to prevent ground potential backflash.

[0022] like Figure 3 As shown, the reinforcement assembly includes clamping plates 10 and bidirectional screws 11. The clamping plates 10 are slidably connected to both sides of the upper part of the base 2. The end of the clamping plate 10 near the lightning rod base 8 is protruding and the clamping plate 10 is made of a deformable elastic material. The bidirectional screw 11 is threaded through one side of the top of the base 2. The bidirectional screw 11 is threaded to the inner side of the two clamping plates 10, and the two clamping plates 10 are in abutting fit with the outside of the lightning rod base 8. The bidirectional screw 11 drives the elastic clamping plates 10 to apply symmetrical clamping force to the lightning rod base 8, and the protruding end is embedded in the lightning rod base 8 to form a mechanical self-locking.

[0023] like Figure 3 As shown, it also includes an alarm 12. The alarm 12 is installed on the lower part of the base 2 near the grounding wire 9. The alarm 12 monitors the potential difference between the base 2 and the mounting plate 1 in real time and triggers an audible and visual alarm when necessary.

[0024] like Figure 3 As shown, it also includes a counter 13, which is installed on one side of the lower part of the base 2 by bolts, and is used to record the number of lightning strikes and the energy.

[0025] like Figure 2 As shown, it also includes an insulating pad 101. The bottom of the mounting plate 1 is glued or bolted with an insulating pad 101. The insulating pad 101 is made of nitrile rubber to block stray current between the equipment frame and the lightning protection device and prevent current from flowing back into the equipment after a lightning strike.

[0026] In use, the insulating pad 101 at the bottom of the mounting plate 1 of this device is fixed to the photovoltaic bracket to block the stray current path between the equipment frame and the lightning protection device, preventing the current from flowing back into the equipment after a lightning strike. The wiring ports 3 distributed around the base 2 connect to the metal part of the photovoltaic module frame, using the original bracket of the photovoltaic array to form an auxiliary lightning interception network, expanding the lightning interception range. The grounding wire 9 is buried deep and welded to the horizontal grounding body to ensure that the grounding resistance meets the requirements. When the electric field strength of the thundercloud reaches the critical value, the exciter 7 at the top of the lightning rod generates corona discharge through the internal semiconductor material, actively attracting lightning to the lightning rod body 6, shortening the lightning response time. When lightning strikes the photovoltaic module frame, the lightning current is conducted to the connecting wire 5 through the fixing bolt 4 and the wiring port 3. The lightning current is diverted through multiple paths to avoid local current overload. The lightning current is transmitted to the lightning rod base 8 through the lightning rod body 6. The lightning rod base 8 and the grounding wire 9 form a low impedance path to discharge the peak current. At the same time, the bidirectional screw 11 is rotated. The rotation of the bidirectional screw 11 drives the elastic clamps 10 on both sides to press against the lightning rod base 8. The protruding part of the clamp 10 is embedded in the outside of the lightning rod base 8 to form a mechanical self-locking structure to ensure the verticality deviation of the lightning rod under the impact of lightning. The counter 13 records the number of pulse currents passing through the grounding wire 9 in real time. When the energy of a single lightning strike exceeds the threshold, it prompts to check the corrosion status of the grounding body. The alarm 12 continuously monitors the potential difference between the base 2 and the mounting plate 1. If the insulating rubber pad 101 ages and causes leakage current, the alarm 12 will be activated to trigger an audible and visual alarm.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A lightning protection device for photovoltaic equipment, characterized in that: It includes a mounting plate (1), a base (2), fixing bolts (4), connecting wires (5), reinforcing components, a lightning rod body (6), an exciter (7), a lightning rod base (8), a fixing screw (801), and a grounding wire (9). The mounting plate (1) has a base (2) in the middle of its top. The base (2) has multiple wiring ports (3) circumferentially open at the bottom. Each wiring port (3) is threaded through and connected to a fixing bolt (4) at the top. The bottom and middle of the base (2) are connected to multiple corresponding wiring ports (3) circumferentially. A number of connecting wires (5), the lower end of the connecting wires (5) is close to the wiring port (3), the base (2) is provided with a reinforcing component on the top, the reinforcing component is abutted against the lightning rod seat (8), the lightning rod body (6) is threadedly connected to the top of the lightning rod seat (8), the lightning rod body (6) is installed with an exciter (7) on the upper part of the lightning rod body (6), the bottom of the lightning rod body (6) is provided with a fixing screw (801), the fixing screw (801) is connected to the threaded top of the lightning rod seat (8), and a grounding wire (9) is connected to one side of the lower part of the base (2).

2. A photovoltaic equipment lightning protection device according to claim 1, characterized in that: The reinforcement assembly includes a clamping plate (10) and a double screw (11). The clamping plate (10) is slidably connected to both sides of the upper part of the base (2). The double screw (11) is threaded through one side of the top of the base (2). The double screw (11) is threadedly connected to the inner side of the two clamping plates (10), and the two clamping plates (10) are in contact with the outside of the lightning rod base (8).

3. A photovoltaic equipment lightning protection device according to claim 2, characterized in that: The end of the clamp (10) near the lightning rod base (8) is protruding, and the clamp (10) is made of a deformable elastic material.

4. A photovoltaic equipment lightning protection device according to claim 3, characterized in that: It also includes an alarm (12), which is installed on the side of the base (2) near the grounding wire (9).

5. A photovoltaic equipment lightning protection device according to claim 4, characterized in that: It also includes a counter (13), which is installed on one side of the lower part of the base (2).

6. A photovoltaic equipment lightning protection device according to claim 5, characterized in that: It also includes an insulating rubber pad (101), and the bottom of the mounting plate (1) is connected to the insulating rubber pad (101).

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