Cathode protection device and method for photovoltaic support

Abstract

The invention relates to a cathode protection device and method of a photovoltaic support, and belongs to the technical field of cathode protection of photovoltaic supports, and the cathode protection device comprises a power supply module, a cathode loop module, an auxiliary anode module and a safety protection module, the negative pole loop module is connected with the power supply module, the input end is connected to the photovoltaic support, the auxiliary anode module is connected with the power supply module, the output end is connected to the photovoltaic support, and the safety protection module is connected to the photovoltaic support and used for protecting a current loop; the power supply module comprises a photovoltaic panel and a direct-current power supply, the current output end of the photovoltaic panel provides current output to the direct-current power supply, and the direct-current power supply supplies power to the device. The cathode protection technology is adopted to protect the photovoltaic support, the structural potential of the photovoltaic support is lower than that of the surrounding environment, then the photovoltaic support is changed into a cathode, protection can be implemented, the service life is prolonged, the professionality is higher, and the application range is wider.

Description

Technical Field

[0001] This application relates to the field of cathodic protection technology for photovoltaic brackets, and in particular to a cathodic protection device and method for photovoltaic brackets. Background Technology

[0002] Solar photovoltaic (PV) mounting brackets are specialized supports designed for placing, installing, and securing solar panels in a solar photovoltaic (PV) power generation system. They are typically made of aluminum alloy, carbon steel, or stainless steel. Under normal circumstances, PV mounting brackets have a lifespan of several decades. However, in areas with high rainfall, long-term rain erosion and high humidity can significantly shorten their lifespan, increasing the maintenance costs of the PV system in the long run.

[0003] Cathodic protection technology is a type of electrochemical protection technology. Its principle is to apply an external current to the surface of the corroded metal structure, and the protected structure becomes the cathode, thereby inhibiting electron migration that causes metal corrosion and avoiding or reducing corrosion.

[0004] Currently, although there are technologies that apply cathodic protection to photovoltaic systems, the technology is not mature enough, and there is still an urgent need for a more specialized and widely applicable cathodic protection device and method for photovoltaic brackets. Summary of the Invention

[0005] The purpose of this application is to provide a cathodic protection device and method for photovoltaic brackets. The method uses cathodic protection technology to protect the photovoltaic brackets by passing direct current to the photovoltaic brackets, so that all points on the surface of the photovoltaic brackets reach the same negative potential, making the structural potential of the photovoltaic brackets lower than that of the surrounding environment, thereby turning the photovoltaic brackets into cathodes. This method can provide protection, extend service life, is more professional, and has a wider range of applications.

[0006] The cathode protection device for a photovoltaic bracket provided in this application adopts the following technical solution: A cathodic protection device for a photovoltaic mounting system includes: The power supply module is used to provide DC power to the device; The negative circuit module is connected to the power supply module and its input terminal is connected to the photovoltaic frame. An auxiliary anode module, connected to the power supply module and with its output connected to the photovoltaic frame; and The safety protection module, connected to the photovoltaic frame, is used to protect the current loop. The power supply module includes a photovoltaic panel and a DC power supply. The current output terminal of the photovoltaic panel provides current output to the DC power supply, which in turn supplies power to the device.

[0007] As a preferred technical solution of this application, the power supply module further includes a transformer and a bridge rectifier, which are connected in series between the photovoltaic panel and the DC power supply.

[0008] As a preferred technical solution of this application, the negative circuit module includes a negative circuit cable and a negative circuit connector that are connected to each other. The negative circuit cable is connected to a DC power supply, and the negative circuit connector is electrically connected to the photovoltaic frame.

[0009] As a preferred technical solution of this application, the auxiliary anode module includes an insulated anode cable and an applied current anode that are interconnected. The insulated anode cable is connected to a DC power supply, and the applied current anode is electrically connected to the photovoltaic frame.

[0010] As a preferred technical solution of this application, the negative electrode circuit connector and the applied current anode are respectively located at both ends of the photovoltaic frame.

[0011] As a preferred technical solution of this application, the safety protection module includes an anode protection shell and a negative electrode protection shell respectively connected to both ends of the photovoltaic frame, with the applied current anode disposed inside the anode protection shell and the negative electrode circuit connector disposed inside the negative electrode protection shell.

[0012] The cathode protection method for a photovoltaic bracket provided in this application adopts the following technical solution: A protection method for a photovoltaic support cathode protection device includes the following steps: After absorbing solar energy, photovoltaic panels convert it into electrical energy. Most of the electrical energy is transmitted outwards, while a small portion of the electrical energy is transmitted to a DC power source in the form of current through a transformer and a bridge rectifier. One end of the photovoltaic frame is connected to a negative potential through a negative circuit connector, and the other end of the photovoltaic frame is connected to a positive electrode through an external current anode. The DC power supply provides a large number of electrons to the photovoltaic frame through the insulated anode cable and the external current anode, so that the photovoltaic frame is in a state of electron surplus and all points on the surface of the photovoltaic frame reach the same negative potential, forming a cathode for protection.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, cathodic protection technology is used to protect the photovoltaic support. Direct current is passed to the photovoltaic support so that all points on the surface of the photovoltaic support reach the same negative potential, making the structural potential of the photovoltaic support lower than that of the surrounding environment. This makes the photovoltaic support a cathode, enabling protection and extending its service life.

[0014] 2. In this application, photovoltaic panels are used to generate electricity directly to power the cathodic protection device, eliminating the need for an external power source, saving the trouble of frequent power replacements, and making the device more convenient to use.

[0015] 3. Photovoltaic power plants use cathodic protection devices with high driving voltage, which can flexibly control the cathodic protection current output within a wide range, making them suitable for photovoltaic power generation applications with a large protection range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the device according to an embodiment of this application; In the diagram, 100 is the photovoltaic frame; 11 is the DC power supply; 12 is the transformer; 13 is the bridge rectifier; 200 is the photovoltaic panel; 21 is the negative circuit cable; 22 is the negative circuit connector; 31 is the insulated anode cable; 32 is the impressed current anode; 41 is the anode protection shell; and 42 is the negative protection shell. Detailed Implementation

[0017] The present application will be further described in detail below with reference to the accompanying drawings.

[0018] Example: This application proposes a cathodic protection device for a photovoltaic bracket, referring to... Figure 1 The device is installed on rows of photovoltaic (PV) racks 100, each housing multiple PV panels 200. The device includes a power supply module, a negative electrode circuit module, an auxiliary anode module, and a safety protection module. The power supply module provides DC power to the entire device. The negative electrode circuit module is connected to the power supply module, with its input connected to one end of the PV rack 100. The auxiliary anode module is connected to the power supply module, with its output connected to the other end of the PV rack 100. The safety protection module is connected to the PV rack 100 to protect the locations in the current loop where the PV rack 100 is connected to the negative electrode circuit module and the auxiliary anode module, respectively. Cathodic protection technology is used to protect the PV racks. DC current is passed to the PV racks, causing all points on the surface of the PV racks to reach the same negative potential. This makes the structural potential of the PV racks lower than the surrounding environment, thus turning the PV racks into cathodes, providing protection and extending their service life.

[0019] The power supply module includes a photovoltaic panel 200, a DC power supply 11, a transformer 12, and a bridge rectifier 13. The photovoltaic panel 200 absorbs solar energy and converts it into electrical energy. Most of the electrical energy is directly transmitted to the power station through the transmission line, and a very small portion of the electrical energy is output to the DC power supply 11 through the current output terminal of the photovoltaic panel 200. The DC power supply then powers the entire cathodic protection device.

[0020] The positive and negative terminals of the DC power supply 11 are connected to the auxiliary anode module and the negative circuit module, respectively. The DC power supply 11, the photovoltaic frame 100, the auxiliary anode module, and the negative circuit module form a current loop. In this embodiment, the power supply module also includes a transformer 12 and a bridge rectifier 13. The transformer 12 and the bridge rectifier 13 are connected in series between the photovoltaic panel and the DC power supply to control and regulate the voltage within the DC power supply 11, enabling the entire device to operate within a safe voltage range.

[0021] Furthermore, the negative circuit module includes a negative circuit cable 21 and a negative circuit connector 22 that are connected to each other. One end of the negative circuit cable 21 is connected to the negative terminal of the DC power supply 11, and the other end is connected to the negative circuit connector 22. The negative circuit connector 22 is conductively connected to one end of the photovoltaic frame 100.

[0022] Furthermore, the auxiliary anode module includes an insulated anode cable 31 and an applied current anode 32 connected to each other. One end of the insulated anode cable 31 is connected to the positive terminal of the DC power supply 11, and the other end is connected to the applied current anode 32. The applied current anode 32 is conductively connected to one end of the photovoltaic frame 100.

[0023] In this embodiment, the negative circuit connector 22 is connected to the photovoltaic frame 100, and the external current anode 32 is connected to the photovoltaic frame 100 at both ends of the photovoltaic frame 100, so that the entire photovoltaic frame 100 becomes the cathode.

[0024] Furthermore, the safety protection module includes an anode protection shell 41 and a negative electrode protection shell 42, respectively connected to both ends of the photovoltaic frame. Both the anode protection shell 41 and the negative electrode protection shell 42 are insulated structures and are detachably connected to the photovoltaic frame 100. The applied current anode 32 is disposed inside the anode protection shell 41 and connected to the photovoltaic frame 100, and the negative electrode circuit connector 22 is disposed inside the negative electrode protection shell 42 and connected to the photovoltaic frame 100. The two shells can effectively protect the negative electrode circuit connector 22 and extend its service life.

[0025] This application also proposes a protection method for a photovoltaic support cathode protection device, including the following steps: After absorbing solar energy, the photovoltaic panel 200 converts it into electrical energy. Most of the electrical energy is transmitted to the outside, and a small part of the electrical energy is transmitted to the DC power supply 11 in the form of current through the transformer 12 and the bridge rectifier 13. One end of the photovoltaic frame 100 is connected to a negative potential through a negative circuit connector, and the other end of the photovoltaic frame is connected to a positive electrode through an external current anode. The DC power supply provides a large number of electrons to the photovoltaic frame through the insulated anode cable and the external current anode, so that the photovoltaic frame is in a state of electron surplus and all points on the surface of the photovoltaic frame reach the same negative potential, forming a cathode for protection.

[0026] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cathode protection device for a photovoltaic bracket, characterized in that, include: The power supply module is used to provide DC power to the device; The negative circuit module is connected to the power supply module and its input terminal is connected to the photovoltaic frame (100); An auxiliary anode module is connected to the power supply module and its output is connected to the photovoltaic frame (100); as well as A safety protection module is connected to the photovoltaic frame (100) to protect the current circuit; The power supply module includes a photovoltaic panel (200) and a DC power supply (11). The current output terminal of the photovoltaic panel (200) provides current output to the DC power supply (11), and the DC power supply (11) supplies power to the device.

2. The cathode protection device for a photovoltaic bracket according to claim 1, characterized in that, The power supply module also includes a transformer (12) and a bridge rectifier (13), which are connected in series between the photovoltaic panel (200) and the DC power supply (11).

3. The cathode protection device for a photovoltaic bracket according to claim 1, characterized in that, The negative circuit module includes a negative circuit cable (21) and a negative circuit connector (22) connected to each other. The negative circuit cable (21) is connected to a DC power supply (11), and the negative circuit connector (22) is electrically connected to a photovoltaic frame (100).

4. The cathode protection device for a photovoltaic bracket according to claim 3, characterized in that, The auxiliary anode module includes an insulated anode cable (31) and an applied current anode (32) connected to each other. The insulated anode cable (31) is connected to a DC power supply (11), and the applied current anode (32) is electrically connected to the photovoltaic frame (100).

5. The cathode protection device for a photovoltaic bracket according to claim 4, characterized in that, The negative circuit connector (22) and the applied current anode (32) are located at the two ends of the photovoltaic frame (100).

6. The cathode protection device for a photovoltaic bracket according to claim 1, characterized in that, The safety protection module includes an anode protection shell (41) and a negative electrode protection shell (42) respectively connected to both ends of the photovoltaic frame (100). The applied current anode (32) is set inside the anode protection shell (41), and the negative electrode circuit connector (22) is set inside the negative electrode protection shell (42).

7. A protection method for a photovoltaic bracket cathodic protection device, characterized in that, Includes the following steps: After absorbing solar energy, the photovoltaic panel (200) converts it into electrical energy. Most of the electrical energy is transmitted to the outside, and a small part of the electrical energy is transmitted to the DC power supply (21) in the form of current through the transformer (12) and the bridge rectifier (13). One end of the photovoltaic frame (100) is connected to a negative potential through a negative circuit connector (22), and the other end of the photovoltaic frame (100) is connected to a positive electrode through an applied current anode (32). The DC power supply (21) provides a large number of electrons to the photovoltaic frame (100) through the insulated anode cable (31) and the applied current anode (32), so that the photovoltaic frame (100) is in an electron surplus state, and all points on the surface of the photovoltaic frame (100) reach the same negative potential, forming a cathode for protection.

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