Photovoltaic system with lightning protection function

Abstract

The utility model discloses a photovoltaic system with a lightning protection function, and relates to the technical field of photovoltaic installation equipment. The technical key points are as follows: the photovoltaic support comprises a photovoltaic support, and a plurality of photovoltaic modules are uniformly arranged on the photovoltaic support; the opposite sides of the photovoltaic modules in the width direction are fixedly installed on the photovoltaic support through electric conductors, and the adjacent photovoltaic modules share the same electric conductor. Two through threaded holes are formed in the electric conductor; two frames in the width direction of the photovoltaic module are provided with internal thread mounting holes matched with the specifications of the threaded holes in the conductor, and the mounting holes in the edge parts of the photovoltaic module are not internally provided with coatings; and the photovoltaic module and the conductor are fixedly connected with the photovoltaic bracket through bolts and nuts. According to the invention, bridging between the photovoltaic modules and fixing work of the photovoltaic modules and the photovoltaic supports can be completed in one step, and the installation efficiency of the photovoltaic system is effectively improved.

Description

Technical Field

[0001] This application relates to the technical field of photovoltaic equipment installation, and particularly relates to a photovoltaic system with lightning protection function. Background Art

[0002] Photovoltaic modules are important components of a photovoltaic system, usually encapsulated with silicon wafers and glass. Such a structure is relatively sensitive to lightning strikes. Photovoltaic systems are often installed on the tops of unshielded buildings, and most of the brackets and frames of the photovoltaic system are made of metal structures. In thunderstorm weather, if the photovoltaic power station is not grounded, the probability of being struck by lightning is very high, which may also cause fires and result in personal and property losses. Therefore, the grounding work of the photovoltaic system is an important task in the construction of the photovoltaic system. After grounding the photovoltaic system, static electricity and charges in the system can be released, thereby reducing the potential difference caused by air pressure changes. In a photovoltaic power generation system, a good grounding device can effectively protect the operation of the system and reduce the occurrence of various faults.

[0003] Normally, the building itself has a lightning protection grounding system. Therefore, when lightning protection grounding is carried out for the photovoltaic system on the top of most buildings, it will be connected to the building lightning protection system through a lightning arrester (which refers to a lightning rod, lightning strip, lightning net that directly receives lightning strikes, as well as metal roofs and metal components used as lightning arresters), and directly introduced into the ground through the down conductor of the building lightning protection system. This method is convenient for construction and has a low cost. Only the lightning protection wiring of components, brackets, etc. needs to be done well, and the lightning protection grounding network of the building itself can be utilized to prevent most lightning strike situations.

[0004] When lightning protection construction is carried out on the photovoltaic system, the frame of the photovoltaic module is often used as a lightning arrester. Generally, the method is to first connect the photovoltaic modules to each other through a wire, and then connect the connected photovoltaic modules and photovoltaic brackets to the existing lightning protection grounding system. Since the frame of the photovoltaic module is usually coated for anti-corrosion, the coating will affect the current conduction between the photovoltaic modules. Therefore, although the frame of the photovoltaic module is a metal structure, they still need to be connected by a special wire. And this will make it more troublesome to install the photovoltaic modules. After the photovoltaic modules are fixedly installed on the photovoltaic brackets, they need to be connected by wires, which reduces the installation efficiency of the photovoltaic system. Summary of the Utility Model

[0005] This application provides a photovoltaic system with lightning protection function, which can synchronously complete the conductive connection work between photovoltaic modules when the photovoltaic modules are installed on the photovoltaic brackets, thereby effectively improving the installation efficiency of the photovoltaic system.

[0006] The above object of this application is achieved through the following technical solutions:

[0007] A photovoltaic system with lightning protection function, comprising a photovoltaic support, on which a plurality of photovoltaic modules are evenly arranged; on one opposite side in the width direction of the photovoltaic module, they are fixedly installed on the photovoltaic support through a conductor, and adjacent photovoltaic modules share the same conductor;

[0008] Two through threaded holes are provided on the conductor;

[0009] Internal threaded mounting holes matching the specifications of the threaded holes on the conductor are provided on both side frames in the width direction of the photovoltaic module, and there is no coating in the mounting holes at the edge of the photovoltaic module;

[0010] After the mounting holes of the photovoltaic module and the threaded holes on the conductor are aligned, the photovoltaic module, the conductor and the photovoltaic support can be fixedly connected together through bolts and nuts.

[0011] Further, the conductor includes two spaced conductive copper cores, the two threaded holes on the conductor are respectively arranged on the two conductive copper cores, a conductive copper plate is welded on the mutually remote sides of the two conductive copper cores, and the two conductive copper plates are connected by a copper wire.

[0012] Further, a ceramic shell is fixedly sleeved outside the two conductive copper cores, and through holes communicating with the conductive copper cores are provided on both the upper and lower sides of the ceramic shell.

[0013] Further, an installation guide rail is fixedly provided on the main beam of the photovoltaic support along the arrangement direction of the plurality of photovoltaic modules, and the ceramic shell is slidably installed in the installation guide rail; the open end of the installation guide rail is located on its upper side, and a positioning groove is provided on the lower side of the installation guide rail along its length direction.

[0014] Further, a strip-shaped avoidance groove is provided on the side wall in the width direction of the installation guide rail and facing upward.

[0015] Further, the photovoltaic module at the edge of the upper part of the photovoltaic support is fixedly connected to one end of a conductive flat steel through its outermost conductor, and the other end of the conductive flat steel is connected to the lightning protection grounding system on the building.

[0016] Further, a lightning rod is installed outside the photovoltaic support, and the lightning rod is connected to the lightning protection grounding system on the building through a conductive lead.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] After the photovoltaic module of the present application is placed on the photovoltaic support, the position of the conductor can be adjusted on the photovoltaic support so that the threaded holes on the conductor are aligned with the installations on the photovoltaic module. Then, bolts are sequentially passed through the conductor, the photovoltaic module, and the photovoltaic support, and are matched with nuts to fix the photovoltaic module, the conductor, and the photovoltaic support together. Since two adjacent photovoltaic modules share the same conductor, and the conductor has the ability to conduct current, the conductors of the two adjacent photovoltaic modules can play a bridging role for them, making the photovoltaic modules arranged side by side conduct electricity with each other. Finally, after connecting them to the original lightning protection and grounding system of the building, the photovoltaic modules can have the ability to prevent lightning. When the present application installs the photovoltaic modules on the photovoltaic support, they can be synchronously connected to the conductors on the photovoltaic support. Compared with the prior art, it is not necessary to specially perform a bridging operation on the photovoltaic modules after installing the external photovoltaic modules, effectively improving the installation efficiency of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0020] Figure 1 is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 is Figure 1 an enlarged schematic diagram of part A in

[0022] Figure 3 is a schematic diagram of the structure after one of the photovoltaic modules of the present application is disassembled from the photovoltaic support;

[0023] Figure 4 is Figure 3 an enlarged schematic diagram of part B in

[0024] Figure 5 is a partial schematic diagram of the conductor of the present application sleeved with a ceramic shell.

[0025] Reference numerals: 1, photovoltaic support; 2, photovoltaic module; 3, conductor; 31, conductive copper core; 32, conductive copper plate; 33, copper wire; 4, threaded hole; 5, installation hole; 6, ceramic shell; 7, installation guide rail; 8, positioning groove; 9, avoidance groove; 10, conductive flat steel; 11, lightning protection and grounding system; 12, lightning rod; 13, conductive lead. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely below. Apparently, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts also belong to the scope of protection of this application.

[0027] As Figures 1-4 shown, a photovoltaic system with a lightning protection function disclosed in this application includes a photovoltaic support 1, on which a plurality of photovoltaic modules 2 are evenly arranged; both opposite sides in the width direction of the photovoltaic module 2 are fixedly installed on the photovoltaic support 1 through a conductor 3, and the adjacent photovoltaic modules 2 share the same conductor 3; two through threaded holes 4 are provided on the conductor 3; internal threaded mounting holes 5 matching the specifications of the threaded holes 4 on the conductor 3 are provided on both side frames in the width direction of the photovoltaic module 2, and there is no coating in the mounting holes 5 at the edge of the photovoltaic module 2; after the mounting holes 5 of the photovoltaic module 2 and the threaded holes 4 on the conductor 3 are aligned, the photovoltaic module 2, the conductor 3 and the photovoltaic support 1 can be fixedly connected together by bolts and nuts.

[0028] In the above embodiments, the existing photovoltaic modules 2 are generally installed on the top of a building and are easily struck by lightning and damaged during thunderstorms. Therefore, lightning protection grounding is often required. When the photovoltaic module 2 is protected by lightning grounding, the metal frame of the photovoltaic module 2 is often used as a lightning arrester and then connected to the original lightning protection grounding system 11 of the building to guide the lightning to the ground. When the photovoltaic modules 2 are installed, they are placed side by side on the photovoltaic support 1. Although the frames of the photovoltaic modules 2 are close to each other, the frames of the photovoltaic modules 2 and the photovoltaic support 1 are usually plated for corrosion protection, and these coatings are not conducive to the conduction of current between adjacent photovoltaic modules 2. Therefore, holes are usually drilled again on the frames of the photovoltaic modules 2, and adjacent photovoltaic modules 2 are reconnected through special wires. The photovoltaic modules 2 on the side are connected to the original lightning protection grounding system 11 together with the photovoltaic support 1 through special wires, thus completing the installation of the photovoltaic modules 2 with lightning protection effects. However, in the current installation method of such photovoltaic modules 2, it is necessary to first fixedly install the photovoltaic modules 2 on the photovoltaic support 1, and then reconnect the adjacent photovoltaic modules 2. The operation is rather troublesome and affects the installation efficiency of the entire photovoltaic system.

[0029] In this application, conductors 3 are provided at positions corresponding to the frames of each photovoltaic module 2 on the photovoltaic support 1. A single row of mounting holes 5 is provided along the length direction of the edges of the photovoltaic module 2. Since there are two threaded holes 4 on the conductor 3, the number of mounting holes 5 at the same height on the adjacent frames of two adjacent photovoltaic modules 2 is exactly two. After the photovoltaic modules 2 are placed side by side on the photovoltaic support 1, the mounting holes 5 on each photovoltaic module 2 can correspond to one of the threaded holes 4 on the conductor 3. Workers only need to use bolts and nuts that match the specifications of the threaded holes 4 and the mounting holes 5 to fix the photovoltaic module 2, the conductor 3, and the photovoltaic support 1 together, and this process is completed synchronously; the bolts and nuts are made of conductive metal materials, and there is no coating in the mounting holes 5 of the photovoltaic module 2. The conductor 3 has good conductivity. After two adjacent photovoltaic modules 2 are fixed to the same conductor 3 and the photovoltaic support 1 through bolts and nuts, the cross-connection effect of two adjacent photovoltaic modules 2 can be achieved simultaneously, and there is no need, as in the prior art, to re-use wires to conduct the metal frames of the photovoltaic modules 2 after the photovoltaic modules 2 are fixed. Therefore, this application effectively improves the installation efficiency of the entire photovoltaic system.

[0030] Further, as Figures 3-5 shown, the conductor 3 includes two spaced conductive copper cores 31. The two threaded holes 4 on the conductor 3 are respectively provided on the two conductive copper cores 31. A conductive copper plate 32 is welded to the mutually remote sides of the two conductive copper cores 31, and the two conductive copper plates 32 are connected by a copper wire 33.

[0031] In the above embodiments, mounting holes 5 are provided on both sides in the width direction of the photovoltaic module 2. Conductors 3 with the same number as the mounting holes 5 on a single side of the photovoltaic module 2 are provided at positions on the photovoltaic support 1 corresponding to the middle regions of two adjacent photovoltaic modules 2. In this way, the two conductive copper cores 31 on each conductor 3 can respectively correspond to the two mounting holes 5 at the same height on the adjacent sides of two photovoltaic modules 2. Workers respectively insert a conductive metal bolt into the mounting holes 5 on two adjacent photovoltaic modules 2, and then twist them so that the two metal bolts continue to pass through the threaded holes 4 on the two conductive copper cores 31 of the conductor 3 at the corresponding positions, and then cooperate with nuts for fixing. The two conductive copper cores 31 are also connected by the conductive copper plate 32 and the copper wire 33. In this way, a stable cross-connection relationship can be formed between the metal frames of two adjacent photovoltaic modules 2 through the conductor 3 and the metal bolts. When lightning strikes, the current can be absorbed and conducted away through the interconnected metal frames of the photovoltaic modules 2, thereby protecting the silicon wafer power generation area of the photovoltaic module 2.

[0032] Further, as Figure 5As shown, a ceramic shell 6 is fixedly sleeved outside two conductive copper cores 31, and through holes communicating with the conductive copper cores 31 are provided on both the upper and lower sides of the ceramic shell 6.

[0033] In the above embodiments, the ceramic shell 6 provided outside the two conductive copper cores 31 can not only protect the conductive copper cores 31, but also improve the overall stability after the conductive copper cores 31 and the like are connected together through the ceramic shell 6.

[0034] Furthermore, as Figures 1-4 shown, an installation guide rail 7 is fixedly provided on the main beam of the photovoltaic support 1 along the arrangement direction of a plurality of photovoltaic modules 2, and the ceramic shell 6 is slidably installed in the installation guide rail 7; the open end of the installation guide rail 7 is located on its upper side, and a positioning groove 8 is provided on the lower side of the installation guide rail 7 along its length direction.

[0035] In the above embodiments, the installation guide rail 7 on the photovoltaic support 1 can not only be used to store the conductor 3, but also enable the ceramic shell 6 outside the conductor 3 to freely slide along the length direction of the installation guide rail 7. In this way, when installing photovoltaic modules 2 with different widths on the photovoltaic support 1, workers can slide the conductor 3 along the installation guide rail 7 through the ceramic shell 6, so that the position of the conductor 3 adapts to the position of the installation hole 5 on the photovoltaic module 2. After the conductor 3 and the ceramic shell 6 outside it are placed in the installation guide rail 7, the open end located on the upper side of the installation guide rail 7 facilitates inserting the metal conductive bolt from the installation hole 5 of the upper photovoltaic module 2 into the corresponding threaded hole 4 on the conductor 3. The positioning groove 8 below the installation guide rail 7 facilitates the conductive metal bolt to pass through the conductor 3 and then pass out from the positioning groove 8, and then cooperate with the nut, thereby fixing the photovoltaic module 2, the conductor 3 and the photovoltaic module 2 together, effectively improving the practicability of the present application.

[0036] Furthermore, as Figures 1-4 shown, a strip-shaped avoidance groove 9 is provided on the side wall of the installation guide rail 7 in the width direction and facing upward.

[0037] In the above embodiments, in order to ensure the sunshine time of the photovoltaic module 2, the main beam of the photovoltaic support 1 is usually inclined, so that the photovoltaic module 2 can be in an inclined state accordingly after being placed on the photovoltaic support 1. The installation guide rail 7 is located between the photovoltaic module 2 and the main beam of the photovoltaic support 1. The upper side in the height direction is its open end (the open end of the installation guide rail 7 is attached to the lower side of the photovoltaic module 2), and the lower side in the height direction is the end where the positioning groove 8 is provided; the upper side in the width direction of the installation guide rail 7 is the side wall adjacent to its open end. The avoidance groove 9 provided on this side wall of the installation guide rail 7 in the present application facilitates extending the two conductive copper plates 32 and the copper wire 33 of the conductor 3 out of the installation guide rail 7, which can reduce the volume of the installation guide rail 7 and also facilitate workers to move the entire conductor 3 along the installation guide rail 7 through the conductive copper plate 32, so that the position of the threaded hole 4 on the conductor 3 adapts to the position of the corresponding installation hole 5 on the photovoltaic module 2.

[0038] Further, as Figure 1 and Figure 2 shown, the photovoltaic module 2 at the upper edge of the photovoltaic support 1 is fixedly connected to one end of the flat copper conductor 10 through the outermost conductor 3 thereof, and the other end of the flat copper conductor 10 is connected to the lightning protection grounding system 11 on the building.

[0039] In the above embodiments, the multiple photovoltaic modules 2 on the photovoltaic support 1 are arranged side by side. Therefore, there is no other photovoltaic module 2 sharing the conductor 3 outside the outermost photovoltaic module 2 (the connection between this photovoltaic module 2 and the adjacent photovoltaic module 2 is its inner side). In this way, only one set of conductors 3 can be used alone for the metal frame on the outside of the outermost photovoltaic module 2. Taking the drawings of this application as an example, there are two mounting holes 5 on the metal frame outside the photovoltaic module 2. Therefore, two conductors 3 need to be separately provided on its edge. And there are two threaded holes 4 on the conductor 3. After being fixedly connected to the photovoltaic support 1 in cooperation with the outermost photovoltaic module 2, there will be one remaining threaded hole 4 on each of the two conductors 3. By passing a conductive metal bolt through one remaining threaded hole 4 on the conductor 3 and through one end of the flat copper conductor 10, the multiple connected photovoltaic modules 2 can be just connected to the flat copper conductor 10. And the other end of the flat copper conductor 10 is connected to the original lightning protection grounding system 11 on the building. In this way, the grounding effect of the multiple photovoltaic modules 2 can be completed. After the metal frames of the multiple photovoltaic modules 2 are cross-connected, a lightning arrester can be formed. When lightning strikes, the metal frame of the photovoltaic module 2 can guide the lightning to the lightning protection grounding system 11 through the flat copper conductor 10.

[0040] Further, as Figure 1 and Figure 2 shown, a lightning rod 12 is installed outside the photovoltaic support 1, and the lightning rod 12 is connected to the lightning protection grounding system 11 on the building through a conductive lead 13.

[0041] In the above embodiments, there is a certain interval between the lightning rod 12 of this application and the photovoltaic support 1 and the photovoltaic module 2. The lightning rod 12 is a tall metal rod with a sharp metal tip at its top. In thunderstorm weather, it can attract lightning to itself and then lead it into the original lightning protection grounding system 11 of the building through the conductive lead 13, thereby reducing the impact of lightning on the photovoltaic power generation system. Attention should be paid to the height and quantity during installation to maximize the lightning protection effect.

[0042] The implementation principle of this embodiment is as follows: First, workers assemble and install the photovoltaic support 1 in the designated area. Then, the photovoltaic modules 2 are placed side by side on the photovoltaic support 1. Next, the workers move each conductor 3 along the installation guide rail 7 on the photovoltaic support 1. Except for the conductors 3 on the sides, the threaded holes 4 of the remaining conductors 3 correspond one by one to the installation holes 5 on the metal frame of the adjacent photovoltaic support 1. One of the threaded holes 4 of the conductor 3 on the side is aligned with the installation hole 5 on the outer frame of the photovoltaic support 1 on the side. Then, the workers fix the photovoltaic module 2, the conductor 3, and the photovoltaic support 1 with conductive metal bolts and nuts, and the assembly work of the photovoltaic module 2 and the photovoltaic support 1 can be completed. Finally, the remaining threaded holes 4 of the conductor 3 on the side are also fixed to one end of the conductive flat steel 10 with conductive metal bolts, and the other end of the conductive flat steel 10 is connected to the original lightning protection and grounding system 11 of the building, so that the grounding and lightning protection operation of the photovoltaic system can be completed. Compared with the prior art, the application can complete the bridging between the photovoltaic modules 2 and the fixation of the photovoltaic modules 2 and the photovoltaic support 1 in one step, effectively improving the installation efficiency of the photovoltaic system.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A photovoltaic system with lightning protection function, comprising a photovoltaic support (1), characterized in that: A plurality of photovoltaic modules (2) are uniformly arranged on the photovoltaic support (1); one pair of opposite sides in the width direction of the photovoltaic module (2) are fixedly installed on the photovoltaic support (1) through a conductor (3), and adjacent photovoltaic modules (2) share the same conductor (3). Two through threaded holes (4) are provided on the conductor (3). Inner threaded mounting holes (5) matching the specifications of the threaded holes (4) on the conductor (3) are provided on both side frames in the width direction of the photovoltaic module (2), and there is no coating in the mounting holes (5) at the edge of the photovoltaic module (2). After the mounting holes (5) of the photovoltaic module (2) and the threaded holes (4) on the conductor (3) are aligned, the photovoltaic module (2), the conductor (3) and the photovoltaic support (1) can be fixedly connected together by bolts and nuts.

2. The photovoltaic system with lightning protection function according to claim 1, characterized in that: The conductor (3) includes two spaced conductive copper cores (31), the two threaded holes (4) on the conductor (3) are respectively arranged on the two conductive copper cores (31), a conductive copper plate (32) is welded on the mutually remote sides of the two conductive copper cores (31), and the two conductive copper plates (32) are connected by a copper wire (33).

3. The photovoltaic system with lightning protection function according to claim 2, characterized in that: A ceramic shell (6) is fixedly sleeved outside the two conductive copper cores (31), and through holes communicating with the conductive copper cores (31) are provided on both the upper and lower sides of the ceramic shell (6).

4. The photovoltaic system with lightning protection function according to claim 3, characterized in that: An installation guide rail (7) is fixedly provided on the main beam of the photovoltaic support (1) along the arrangement direction of the plurality of photovoltaic modules (2), and the ceramic shell (6) is slidably installed in the installation guide rail (7); the open end of the installation guide rail (7) is located on its upper side, and a positioning groove (8) is provided on the lower side of the installation guide rail (7) along its length direction.

5. The photovoltaic system with lightning protection function according to claim 4, characterized in that: A strip-shaped avoidance groove (9) is provided on the side wall in the width direction of the installation guide rail (7) and facing upward.

6. The photovoltaic system with lightning protection function according to any one of claims 1 to 5, characterized in that: The photovoltaic module (2) at the edge of the upper part of the photovoltaic support (1) is fixedly connected to one end of a conductive flat steel (10) through its outermost conductor (3), and the other end of the conductive flat steel (10) is connected to a lightning protection grounding system (11) on the building.

7. The photovoltaic system with lightning protection function according to any one of claims 1 to 5, characterized in that: A lightning rod (12) is installed outside the photovoltaic support (1), and the lightning rod (12) is connected to the lightning protection grounding system (11) on the building through a conductive lead (13).

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