Photovoltaic direct current arc monitoring method and platform

Abstract

The invention relates to the technical field of photovoltaic power station monitoring, in particular to a photovoltaic direct-current arc monitoring method and platform, comprising a control box and a monitoring assembly, the monitoring assembly is arranged in the control box, the monitoring assembly comprises a first through hole, the first through hole is formed in the back surface of the control box, an optical filter is fixedly connected in the first through hole, and a second through hole is formed in the back surface of the control box. The interior of the control box is fixedly connected with a photoelectric sensor, and one side of the photoelectric sensor is fixedly connected with a monitoring head. According to the photovoltaic direct-current arc monitoring method and the photovoltaic direct-current arc monitoring platform, when the device is used, light in a specific wavelength range emitted by a direct-current arc can be allowed to enter a control box through an installed optical filter, then the direct-current arc can be monitored in real time through an installed photoelectric sensor, and when the photoelectric sensor monitors the direct-current arc, the photoelectric sensor can monitor the direct-current arc in real time. The control panel starts the audible and visual alarm and the signal transmission module, so that a worker can send information, and the worker can respond in time.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power station monitoring, and in particular to a photovoltaic direct current arc monitoring method and platform. Background Art

[0002] A photovoltaic power station, also known as a solar photovoltaic power station, refers to a photovoltaic power generation system that is connected to a power grid and transmits electricity to the grid. When sunlight shines on solar cells, photons transfer energy to electrons in the material, causing them to transition from a compound state to a conductor state, forming a voltage difference. By connecting multiple solar cells in series or in parallel, a current loop is formed, thereby generating electricity.

[0003] In a photovoltaic power station, when the connection points of the DC circuit are loose, the insulation is damaged, the cable is aged, or it is affected by external factors (such as mechanical damage, humid environment, etc.), a DC arc may be generated. The temperature can reach thousands of degrees Celsius, which can easily ignite the surrounding flammable materials. Once a fire occurs, it is easy to cause serious property losses. For this reason, we propose a photovoltaic DC arc monitoring method and platform. Summary of the invention

[0004] The purpose of the present invention is to provide a photovoltaic DC arc monitoring method and platform to solve the problem of DC arc that may be generated when the connection points of the DC circuit proposed in the above background technology are loose, the insulation is damaged, the cable is aged or affected by external factors. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic DC arc monitoring method and platform, comprising a control box and a monitoring component, wherein the monitoring component is arranged inside the control box, the monitoring component comprises a through hole 1, the through hole 1 is opened on the back of the control box, a filter is fixedly connected inside the through hole 1, a photoelectric sensor is fixedly connected inside the control box, a monitoring head is fixedly connected to one side of the photoelectric sensor, a reflector is fixedly connected inside the control box, a protective frame is fixedly connected between the reflector and the outer side of the photoelectric sensor, and the outer side of the protective frame is fixedly connected to the inside of the control box. When the device is used, the light of a specific wavelength range emitted by the DC arc can be allowed to enter the interior of the control box through the installed filter, and then the installed photoelectric sensor can utilize the physical phenomenon that the arc will generate visible light to monitor the light radiation in the DC arc, so that the DC arc can be monitored in real time. When the photoelectric sensor detects the DC arc, the control panel will start the sound and light alarm and the signal transmission module, so that the staff can transmit information so that the staff can respond in time.

[0005] Further preferably, the front side of the photoelectric sensor is electrically connected with a connecting wire, the interior of the control box is fixedly connected with a controller, the back side of the controller is electrically connected to the photoelectric sensor via a connecting wire, and a connecting component is provided inside the control box.

[0006] Further preferably, the connecting component includes a relay, the relay, the relay, the relay is fixedly connected to the inside of the control box, a power module is fixedly connected to the inside of the control box, the power module is electrically connected to the relay, the relay is electrically connected to the photoelectric sensor, and a through hole 2 is fixedly connected to the back of the control box, so that the relay can be connected to a device for cutting off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent and the loss of resources can be reduced.

[0007] Further preferably, an electromagnetic radiation sensor is fixedly connected to the top of the protection frame, and the electromagnetic radiation sensor is electrically connected to the relay. A detection head is fixedly connected to the back of the electromagnetic radiation sensor, and the outer side of the detection head is adapted to the interior of through hole 2. A control component is arranged inside the control box, and the installed electromagnetic radiation sensor can be used to analyze the electromagnetic radiation data and extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc., so as to determine whether there is a DC arc fault.

[0008] Further preferably, the control component includes a control panel, the control panel is fixedly connected to the front side of the control box, the control panel is electrically connected to the photoelectric sensor, the electromagnetic radiation sensor and the power module, a sound groove is provided on the front side of the control box, an audible and visual alarm is fixedly connected to the inside of the control box, the audible and visual alarm is electrically connected to the control panel, a signal transmission module is fixedly connected to the top of the audible and visual alarm, and the control panel will activate the audible and visual alarm and the signal transmission module, so that the staff can send information so that the staff can respond in time.

[0009] Further preferably, the signal transmission module is electrically connected to the control panel, a plurality of mounting slots are provided at the bottom of the control box and the plurality of mounting slots are distributed in a linear array, and a box door is rotatably connected to one side of the control box.

[0010] Further preferably, a sealing frame is fixedly connected to the front of the box door, the outer side of the sealing frame is matched with the interior of the control box, a handle is fixedly connected to the back of the box door, and a rain shield is fixedly connected to the top of the control box.

[0011] Further preferably, the top of the rain shield frame is fixedly connected to a support frame, the top of the support frame is fixedly connected to a camera, and the camera is electrically connected to a power module.

[0012] A photovoltaic DC arc monitoring method and platform, characterized by comprising the following steps:

[0013] S1: When using the device, the staff can install the control box near the photovoltaic panel array, inside the DC junction box or at the DC cable connection, etc., where arcs are likely to occur. Then the staff can connect the photovoltaic panel with the relay and the power module through the installation slot. Then, through the installed filter, the light of a specific wavelength range emitted by the DC arc can be allowed to enter the inside of the control box. Then, through the installed photoelectric sensor, in the photovoltaic DC arc monitoring, the physical phenomenon that the arc will produce visible light is used. When a DC arc occurs, it will release strong light radiation, and its spectral range includes ultraviolet rays, visible light and infrared rays. For the strong light emitted by the DC arc, a large photocurrent will be generated. Through the subsequent signal processing circuit, the photoelectric sensor can sense the change of this light radiation, thereby detecting the existence of the arc.

[0014] S2: When the photoelectric sensor detects a DC arc, the control panel will activate the sound and light alarm and the signal transmission module, so that the sound and light alarm can send an alarm to the outside, and the signal transmission module will send information to the backstage staff so that the staff can respond;

[0015] S3: At the same time, the installed electromagnetic radiation sensor can analyze the electromagnetic radiation data and extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc. The electromagnetic radiation signal generated by the photovoltaic DC arc has certain characteristics. By comparing it with the electromagnetic radiation signal under normal conditions, it can be determined whether there is a DC arc fault. When a DC arc fault exists, the relay can be connected to the device that cuts off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, when the device is used, the installed filter can allow light in a specific wavelength range emitted by the DC arc to enter the interior of the control box, and then the installed photoelectric sensor can utilize the physical phenomenon that the arc will generate visible light to monitor the light radiation in the DC arc, so that the DC arc can be monitored in real time. When the photoelectric sensor detects the DC arc, the control panel will activate the sound and light alarm and the signal transmission module, so that the staff can send information so that the staff can respond in time.

[0018] In the present invention, during monitoring, the electromagnetic radiation data can be analyzed by the installed electromagnetic radiation sensor to extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc., so as to determine whether there is a DC arc fault. When a DC arc fault exists, the relay can be connected to a device that cuts off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent and the loss of resources can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the monitoring component of the present invention;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at a in the middle;

[0023] Figure 5 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the control component of the present invention.

[0025] In the figure: 1. control box; 2. monitoring component; 201. through hole one; 202. filter; 203. photoelectric sensor; 204. monitoring head; 205. reflector; 206. protection frame; 3. connecting wire; 4. controller; 5. connecting component; 501. relay; 502. power module; 503. through hole two; 6. electromagnetic radiation sensor; 7. detection head; 8. control component; 801. control panel; 802. sound trough; 803. sound and light alarm; 804. signal transmission module; 9. mounting slot; 10. box door; 11. sealing frame; 12. handle; 13. rain shield; 14. support frame; 15. camera. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 6The present invention provides a technical solution: a photovoltaic DC arc monitoring method and platform, including a control box 1 and a monitoring component 2, the monitoring component 2 is arranged inside the control box 1, the monitoring component 2 includes a through hole 201, the through hole 201 is opened on the back of the control box 1, the filter 202 is fixedly connected inside the through hole 201, the photoelectric sensor 203 is fixedly connected inside the control box 1, a monitoring head 204 is fixedly connected to one side of the photoelectric sensor 203, a reflector 205 is fixedly connected inside the control box 1, a protective frame 206 is fixedly connected between the reflector 205 and the outer side of the photoelectric sensor 203, and the outer side of the protective frame 206 is fixedly connected to the inside of the control box 1.

[0028] In this embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the front of the photoelectric sensor 203 is electrically connected to a connecting wire 3, the interior of the control box 1 is fixedly connected to a controller 4, the back of the controller 4 is electrically connected to the photoelectric sensor 203 through the connecting wire 3, the interior of the control box 1 is provided with a connecting component 5, the connecting component 5 includes a relay 501, a relay 501, a relay 501, the relay 501 is fixedly connected to the interior of the control box 1, the interior of the control box 1 is fixedly connected to a power module 502, the power module 502 is electrically connected to the relay 501, the relay 501 is electrically connected to the photoelectric sensor 203, the back of the control box 1 is fixedly connected to a through hole 2 503, the top of the protective frame 206 is fixedly connected to an electromagnetic radiation sensor 6, the electromagnetic radiation sensor 6 is electrically connected to the relay 501, the back of the electromagnetic radiation sensor 6 is fixedly connected to a detection head 7, the outer side of the detection head 7 is adapted to the interior of the through hole 2 503, and the interior of the control box 1 is provided with a control component 8.

[0029] In this embodiment, Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the control assembly 8 includes a control panel 801, the control panel 801 is fixedly connected to the front of the control box 1, the control panel 801 is electrically connected to the photoelectric sensor 203 and the electromagnetic radiation sensor 6 and the power module 502, a sounding slot 802 is provided on the front of the control box 1, an audible and visual alarm 803 is fixedly connected to the inside of the control box 1, the audible and visual alarm 803 is electrically connected to the control panel 801, a signal transmission module 804 is fixedly connected to the top of the audible and visual alarm 803, and the signal transmission module 804 is electrically connected to the control panel 801 Connection, a plurality of installation grooves 9 are provided at the bottom of the control box 1 and the plurality of installation grooves 9 are distributed in a linear array, a box door 10 is rotatably connected to one side of the control box 1, a sealing frame 11 is fixedly connected to the front of the box door 10, the outer side of the sealing frame 11 is adapted to the interior of the control box 1, a handle 12 is fixedly connected to the back of the box door 10, a rain shield frame 13 is fixedly connected to the top of the control box 1, a support frame 14 is fixedly connected to the top of the support frame 14, a camera 15 is fixedly connected to the top of the support frame 14, and the camera 15 is electrically connected to the power module 502.

[0030] A photovoltaic DC arc monitoring method and platform, characterized by comprising the following steps:

[0031] S1: When using the device, the staff can install the control box 1 near the photovoltaic panel array, inside the DC junction box or at the DC cable connection, etc., where arcs are likely to occur. Then the staff can connect the photovoltaic panel with the relay 501 and the power module 502 through the installation slot 9. Then, through the installed filter 202, light of a specific wavelength range emitted by the DC arc can be allowed to enter the interior of the control box 1. Then, through the installed photoelectric sensor 203, in the photovoltaic DC arc monitoring, the physical phenomenon that the arc will generate visible light is used. When a DC arc occurs, it will release strong light radiation, and its spectral range includes ultraviolet rays, visible light and infrared rays. For the strong light emitted by the DC arc, a large photocurrent will be generated. Through the subsequent signal processing circuit, the photoelectric sensor 203 can sense the change of this light radiation, thereby detecting the existence of the arc;

[0032] S2: When the photoelectric sensor 203 detects a DC arc, the control panel 801 will start the sound and light alarm 803 and the signal transmission module 804, so that the sound and light alarm 803 can send an alarm to the outside, and the signal transmission module 804 will send information to the backstage staff so that the staff can respond;

[0033] S3: At the same time, the installed electromagnetic radiation sensor 6 can analyze the electromagnetic radiation data and extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc. The electromagnetic radiation signal generated by the photovoltaic DC arc has certain characteristics. By comparing it with the electromagnetic radiation signal under normal circumstances, it can be determined whether there is a DC arc fault. When a DC arc fault exists, the relay 501 can be connected to a device that cuts off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent.

[0034] The use method and advantages of the present invention: When the photovoltaic DC arc monitoring method and platform are used, the working process is as follows:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, when using the device, the staff can install the control box 1 near the photovoltaic panel array, inside the DC junction box or at the DC cable connection, etc., where arcs are likely to occur. Then the staff can connect the photovoltaic panel to the relay 501 and the power module 502 through the installation slot 9. Then, through the installed filter 202, light in a specific wavelength range emitted by the DC arc can be allowed to enter the interior of the control box 1. Then, through the installed photoelectric sensor 203, in the photovoltaic DC arc monitoring, the physical phenomenon that the arc will generate visible light is used. When a DC arc occurs, strong light radiation will be released, and its spectral range includes ultraviolet rays, visible light, infrared rays and other parts. For the strong light emitted by the DC arc, a large photocurrent will be generated. Through the subsequent signal processing circuit, the photoelectric sensor 203 can sense this light radiation. changes, thereby detecting the presence of an arc. When the photoelectric sensor 203 detects a DC arc, the control panel 801 will start the sound and light alarm 803 and the signal transmission module 804, so that the sound and light alarm 803 can issue an alarm to the outside. At the same time, the signal transmission module 804 will send information to the background staff so that the staff can respond. At the same time, the installed electromagnetic radiation sensor 6 can analyze the electromagnetic radiation data and extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc. The electromagnetic radiation signal generated by the photovoltaic DC arc has certain characteristics. By comparing it with the electromagnetic radiation signal under normal circumstances, it can be determined whether there is a DC arc fault. When a DC arc fault exists, the relay 501 can be connected to the device that cuts off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A photovoltaic DC arc monitoring platform, comprising a control box (1) and a monitoring component (2), characterized in that: The monitoring component (2) is arranged inside the control box (1), and the monitoring component (2) comprises a through hole (201), the through hole (201) is opened on the back of the control box (1), a filter (202) is fixedly connected inside the through hole (201), a photoelectric sensor (203) is fixedly connected inside the control box (1), a monitoring head (204) is fixedly connected to one side of the photoelectric sensor (203), a reflector (205) is fixedly connected inside the control box (1), a protective frame (206) is fixedly connected between the reflector (205) and the outer side of the photoelectric sensor (203), and the outer side of the protective frame (206) is fixedly connected to the inside of the control box (1).

2. A photovoltaic DC arc monitoring platform according to claim 1, characterized in that: The front side of the photoelectric sensor (203) is electrically connected to a connecting wire (3), the interior of the control box (1) is fixedly connected to a controller (4), the back side of the controller (4) is electrically connected to the photoelectric sensor (203) via the connecting wire (3), and a connecting component (5) is provided inside the control box (1).

3. A photovoltaic DC arc monitoring platform according to claim 2, characterized in that: The connection component (5) comprises a relay (501), the relay (501), the relay (501), the relay (501), the relay (501) is fixedly connected to the inside of the control box (1), a power module (502) is fixedly connected to the inside of the control box (1), the power module (502) is electrically connected to the relay (501), the relay (501) is electrically connected to the photoelectric sensor (203), and a through hole 2 (503) is fixedly connected to the back of the control box (1).

4. A photovoltaic DC arc monitoring platform according to claim 1, characterized in that: An electromagnetic radiation sensor (6) is fixedly connected to the top of the protection frame (206), and the electromagnetic radiation sensor (6) is electrically connected to the relay (501). A detection head (7) is fixedly connected to the back of the electromagnetic radiation sensor (6), and the outer side of the detection head (7) is adapted to the inside of the second through hole (503). A control component (8) is arranged inside the control box (1).

5. A photovoltaic DC arc monitoring platform according to claim 4, characterized in that: The control assembly (8) comprises a control panel (801), the control panel (801) is fixedly connected to the front of the control box (1), the control panel (801) is electrically connected to the photoelectric sensor (203), the electromagnetic radiation sensor (6) and the power module (502), a sounding slot (802) is provided on the front of the control box (1), an audible and visual alarm (803) is fixedly connected to the inside of the control box (1), the audible and visual alarm (803) is electrically connected to the control panel (801), and a signal transmission module (804) is fixedly connected to the top of the audible and visual alarm (803).

6. A photovoltaic DC arc monitoring platform according to claim 5, characterized in that: The signal transmission module (804) is electrically connected to the control panel (801); a plurality of mounting slots (9) are provided at the bottom of the control box (1) and the plurality of mounting slots (9) are distributed in a linear array; and a box door (10) is rotatably connected to one side of the control box (1).

7. A photovoltaic DC arc monitoring platform according to claim 6, characterized in that: The front of the box door (10) is fixedly connected to a sealing frame (11), the outer side of the sealing frame (11) is adapted to the interior of the control box (1), the back of the box door (10) is fixedly connected to a handle (12), and the top of the control box (1) is fixedly connected to a rain shield frame (13).

8. A photovoltaic DC arc monitoring platform according to claim 7, characterized in that: The top of the rain shield frame (13) is fixedly connected to a support frame (14), the top of the support frame (14) is fixedly connected to a camera (15), and the camera (15) is electrically connected to a power module (502).

9. A photovoltaic DC arc monitoring method, characterized in that: The following steps are involved: S1: When using the device, the staff can install the control box (1) near the photovoltaic panel array, inside the DC junction box or at the DC cable connection, etc., where arcs are likely to occur. Then, the staff can connect the photovoltaic panel with the relay (501) and the power module (502) through the installation slot (9). Then, through the installed filter (202), light in a specific wavelength range emitted by the DC arc can be allowed to enter the interior of the control box (1). Then, through the installed photoelectric sensor (203), in the photovoltaic DC arc monitoring, the physical phenomenon that the arc generates visible light is used. When a DC arc occurs, it releases strong light radiation, and its spectral range includes ultraviolet rays, visible light and infrared rays. For the strong light emitted by the DC arc, a large photocurrent is generated. Through the subsequent signal processing circuit, the photoelectric sensor (203) can sense the change in this light radiation, thereby detecting the existence of the arc. S2: When the photoelectric sensor (203) detects a DC arc, the control panel (801) activates the sound and light alarm (803) and the signal transmission module (804), so that the sound and light alarm (803) can send an alarm to the outside, and the signal transmission module (804) will send information to the backstage staff so that the staff can respond; S3: At the same time, the electromagnetic radiation data can be analyzed by the installed electromagnetic radiation sensor (6) to extract the characteristic parameters of the signal, such as signal strength, frequency distribution, time domain waveform, etc. The electromagnetic radiation signal generated by the photovoltaic DC arc has certain characteristics. By comparing it with the electromagnetic radiation signal under normal conditions, it can be determined whether there is a DC arc fault. When a DC arc fault exists, the relay (501) can be connected to a device that cuts off the circuit, so that the DC arc can be prevented from causing greater harm to a certain extent.

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