A solar light harvesting device and photovoltaic power station

Abstract

This invention discloses a solar light harvesting device and a photovoltaic power station, comprising: several optical sensing heads, several optical fibers, a beam convergence section, and a camera; wherein each optical sensing head corresponds to one optical fiber; each optical sensing head is connected to the first end of its corresponding optical fiber; the second ends of all optical fibers are connected to the first end of the beam convergence section; the camera is connected to the second end of the beam convergence section, and the camera is spaced at a preset distance from the beam convergence section; wherein the preset distance is specifically the focusing distance of the camera. This invention harvests sunlight through optical sensing heads, guides the light to the beam convergence section through optical fibers, and captures images of the beam convergence section using a camera, thereby completing the harvesting of sunlight. This invention is based on the autonomous movement of sunlight to complete the harvesting, eliminating any malfunctions that could prevent the harvesting of sunlight and improving the anti-interference capability of sunlight harvesting.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic technology, and in particular to a solar energy harvesting device and a photovoltaic power station. Background Technology

[0002] In photovoltaic (PV) power plants, specialized solar radiation sensors are typically installed, such as light sensors or total solar radiation sensors located above the PV panels. These sensors directly measure the intensity of solar radiation and transmit the data to the power plant's monitoring system. The PV power plant monitoring system can then adjust the power plant's generation parameters based on the received solar irradiance information, thereby achieving high and stable production. These sensors typically convert light intensity signals into digital signals at the signal acquisition site and transmit them to the controller via wired or wireless means.

[0003] However, the process of field acquisition, conversion, transmission, reception and storage of solar radiation sensors is quite complex. Because basic operating conditions such as regulated power supply and clock are required for each part of the circuit, solar radiation sensors are easily affected by circuit failures when collecting sunlight, resulting in low anti-interference capability.

[0004] Therefore, there is an urgent need for a solar radiation collection strategy to solve the problem of low anti-interference capability caused by solar radiation sensor-based solar radiation collection. Summary of the Invention

[0005] This invention provides a solar radiation collection device and a photovoltaic power station to solve the problem of low anti-interference capability caused by solar radiation sensor-based solar radiation collection.

[0006] To address the aforementioned problems, one embodiment of the present invention provides a sunlight collection device, comprising: a plurality of optical sensing heads, a plurality of optical fibers, a bundled section, and a camera; wherein each of the optical sensing heads corresponds to an optical fiber;

[0007] Each of the optical sensing heads is connected to the first end of the corresponding optical fiber;

[0008] The second end of all optical fibers is connected to the first end of the bundle section;

[0009] The camera is positioned directly opposite the second end of the beam convergence section. Sunlight passes sequentially through the optical sensor head, optical fiber, and beam convergence section. Upon reaching the beam convergence section, the sunlight forms a light spot, allowing the camera to capture the light spot and obtain light spot data.

[0010] As an improvement to the above solution, this embodiment further includes: a processor; wherein the processor is used to receive the light spot data to obtain the illumination intensity of sunlight on the optical sensor head.

[0011] As an improvement to the above solution, the optical sensing head includes: a housing and a light wavelength filter; the optical sensing head is disposed in several light collection areas; wherein each light collection area is the area with the highest light intensity selected based on the historical light intensity of the photovoltaic power station; several optical sensing heads are disposed in each light collection area; wherein, in a light collection area, the light wavelength filter of each optical sensing head is different from each other, the geographical location of each optical sensing head is the same, and the orientation of each optical sensing head is different from each other.

[0012] As an improvement to the above solution, the step of transmitting the light spot data to the processor to obtain the illumination intensity of sunlight on the optical sensor head includes:

[0013] The processor corrects each light spot data in the light spot data to obtain a plurality of corrected light spot data; wherein, the light spot data includes a plurality of light spot data, and each light spot data is obtained by a light sensor head and an optical fiber;

[0014] Data extraction is performed on the corrected light spot data to obtain the illumination wavelength and illumination intensity corresponding to each corrected light spot data.

[0015] As an improvement to the above solution, the outer shell is made of a transparent or semi-transparent material.

[0016] Accordingly, one embodiment of the present invention also provides a photovoltaic power station, including: a solar radiation collection device, a plurality of photovoltaic modules, and a plurality of power optimizers; wherein, the solar radiation collection device is applied to the solar radiation collection apparatus as described in this application;

[0017] The location of each photovoltaic module corresponds to the location of a power optimizer and the location of an optical sensor head of the solar light collection device; each photovoltaic module is connected to a power optimizer, and each power optimizer is connected to the processor of the solar light collection device.

[0018] After the processor of the solar light acquisition device extracts the light wavelength and light intensity of each optical sensor head, it determines the strongest light direction corresponding to each optical sensor head based on the light wavelength and light intensity, and generates a PWM signal corresponding to each optical sensor head. Then, it transmits each PWM signal to the target power optimizer corresponding to each optical sensor head so that the target power optimizer adjusts the output impedance of the photovoltaic module.

[0019] As can be seen from the above, the present invention has the following beneficial effects:

[0020] This invention provides a sunlight collection device, comprising: a plurality of optical sensing heads, a plurality of optical fibers, a beam convergence section, and a camera; wherein each optical sensing head corresponds to a corresponding optical fiber; each optical sensing head is connected to a first end of its corresponding optical fiber; the second ends of all optical fibers are connected to the first end of the beam convergence section; the camera is connected to the second end of the beam convergence section, and the camera is spaced at a preset distance from the beam convergence section; wherein the preset distance is specifically the focusing distance of the camera. This invention collects sunlight through optical sensing heads, guides the light to the beam convergence section through optical fibers, and captures images of the beam convergence section through a camera, thereby completing the collection of sunlight. Compared to collecting sunlight through solar radiation sensors, this invention does not require additional circuitry, and completes the collection of sunlight based on the autonomous movement of sunlight, eliminating any malfunctions that could prevent the collection of sunlight and improving the anti-interference capability of sunlight collection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a sunlight collection device provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a bundle cross-section provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a sunlight collection device provided in another embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a photovoltaic power station provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a photovoltaic power station provided in another embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram of a photovoltaic power station provided in another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the correction provided in another embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a sunlight collection device according to an embodiment of the present invention, including: a plurality of optical sensing heads, a plurality of optical fibers, a bundled section and a camera; wherein, each of the optical sensing heads corresponds to an optical fiber;

[0031] Each of the optical sensing heads is connected to the first end of the corresponding optical fiber;

[0032] The second end of all optical fibers is connected to the first end of the bundle section;

[0033] The camera is positioned directly opposite the second end of the beam convergence section. Sunlight passes sequentially through the optical sensor head, optical fiber, and beam convergence section. Upon reaching the beam convergence section, the sunlight forms a light spot, allowing the camera to capture the light spot and obtain light spot data.

[0034] exist Figure 1 In the diagram, 1-1 represents the sun. 1-2, 1-3, and 1-4 are optical sensor heads, 1-5 is an optical fiber, 1-6 is a cluster section, and 1-7 is a camera.

[0035] In one specific embodiment, the optical sensing head is an optical device, such as a glass head. Its main function is to guide light and protect the optical fiber connected to it. Steps 1-5 transmit the optical fiber passing through the optical sensing head 1-4 to the bundled section 1-6. The surface of the bundled section is flat and may be formed by a semi-transparent or transparent cover, or it may be uncovered. Step 1-7 Takes a photograph of section 1-6, facing it directly, as required.

[0036] As an improvement to the above solution, this embodiment further includes: a processor; wherein the processor is used to receive the light spot data to obtain the illumination intensity of sunlight on the optical sensor head.

[0037] See Figure 2 , Figure 2 This is a schematic diagram of a bundled cross-section provided in an embodiment of the present invention, wherein 2-1 is a bundled cross-section; 2-2 is a cross-section of a single optical fiber, and each cross-section can display a light spot. Multiple optical fibers are bundled together to form an optical fiber bundle.

[0038] In one specific embodiment, the camera is connected to the processor wirelessly or via a wired connection.

[0039] As an improvement to the above solution, the optical sensing head includes: a housing and a light wavelength filter; the optical sensing head is disposed in several light collection areas; wherein each light collection area is the area with the highest light intensity selected based on the historical light intensity of the photovoltaic power station; several optical sensing heads are disposed in each light collection area; wherein, in a light collection area, the light wavelength filter of each optical sensing head is different from each other, the geographical location of each optical sensing head is the same, and the orientation of each optical sensing head is different from each other.

[0040] As an improvement to the above solution, the step of transmitting the light spot data to the processor to obtain the illumination intensity of sunlight on the optical sensor head includes:

[0041] The processor corrects each light spot data in the light spot data to obtain a plurality of corrected light spot data; wherein, the light spot data includes a plurality of light spot data, and each light spot data is obtained by a light sensor head and an optical fiber;

[0042] Data extraction is performed on the corrected light spot data to obtain the illumination wavelength and illumination intensity corresponding to each corrected light spot data.

[0043] To better illustrate, the correction specifically refers to:

[0044] Correction methods such as Figure 7 As shown: Figure 7 In this diagram, 7-1 is an irradiator that can directly read the light intensity at the current position and direction (7-3); 7-2 is a digital camera. Light rays from the same position and direction as 7-1 are guided by optical fibers and projected onto 7-2; when 7-2 takes a picture, the resulting image contains brightness information for the corresponding bright spot; the light intensities in 7-3 and 7-4 are subtracted from those in 7-5 to obtain the difference between the light intensity signal obtained from 7-2 and the signal in 7-1; removing 7-2 and adding the previously calculated difference to the light intensity in 7-2 yields the corresponding light intensity; there are many methods for brightness correction. Only one example is given here; its essence is correction based on the strong correlation between 7-1 and 7-2.

[0045] In one specific embodiment, sunlight is transmitted through each optical fiber to a cluster section. Taking a photograph of the cluster section yields an image containing brightness information. Since different optical fibers transmit optical signals differently, this difference must be corrected. After correction, the loss of the corresponding optical path in each fiber is the same. This allows the illumination intensity at a corresponding point on each optical fiber to be obtained from the photograph.

[0046] Understandably, in a large photovoltaic power plant, multiple images can be merged. Mature image processing technology can then be used to quickly obtain near real-time changes in sunlight intensity across the entire plant.

[0047] As an improvement to the above solution, the outer shell is made of a transparent or semi-transparent material.

[0048] For a better explanation, see [link to relevant documentation]. Figure 3 ,exist Figure 3 In this design, optical sensor heads 4-1 and 4-2 are fiber optic sensor heads pointing in different directions from the same point. Each sensor head contains a wavelength filter that restricts the passage of different wavelengths of light. For example, optical sensor head 4-1 allows red light to pass through, while optical sensor head 4-2 allows green light to pass through. These two sensor heads are connected to the same optical fiber. Since the proportion of each color of light in sunlight is fixed, during post-processing, the brightness of monochromatic light in different directions can be used to obtain overall brightness information in that direction, thereby determining the direction of strongest light intensity based on the brightest monochromatic light.

[0049] Accordingly, one embodiment of the present invention also provides a photovoltaic power station, including: a solar radiation collection device, a plurality of photovoltaic modules, and a plurality of power optimizers; wherein, the solar radiation collection device is applied to the solar radiation collection apparatus as described in this application;

[0050] The location of each photovoltaic module corresponds to the location of a power optimizer and the location of an optical sensor head of the solar light collection device; each photovoltaic module is connected to a power optimizer, and each power optimizer is connected to the processor of the solar light collection device.

[0051] After the processor of the solar light acquisition device extracts the light wavelength and light intensity of each optical sensor head, it determines the strongest light direction corresponding to each optical sensor head based on the light wavelength and light intensity, and generates a PWM signal corresponding to each optical sensor head. Then, it transmits each PWM signal to the target power optimizer corresponding to each optical sensor head so that the target power optimizer adjusts the output impedance of the photovoltaic module.

[0052] In one specific embodiment, see Figure 4 5-1, 5-2, and 5-3 represent optical sensor heads, made of transparent or semi-transparent material, connected to optical fibers. External light enters optical fiber 5-4 through the optical sensor head. Multiple optical fibers together form a light beam, which is then cross-sectioned at an appropriate size to form the cross-section 5-7. 5-5 is a digital camera, capable of capturing images of 5-7. The captured image data is processed within the MCU (i.e., the processor described in this invention) 5-6 to obtain the brightness signal at the location of each optical fiber sensor head.

[0053] exist Figure 4In the diagram, 5-11, 5-12, and 5-13 represent different photovoltaic modules used for photoelectric conversion. Each module has a light sensor head placed next to it, namely 5-1, 5-2, and 5-3. During system operation, sunlight enters optical fiber 5-4 through 5-1, forming a corresponding light spot at the fiber cross-section 5-7. Camera 5-5 captures this light spot, and the image is processed by MCU 5-6 to obtain the light intensity at the location of 5-1. This light intensity information is used within 5-6 to generate operating parameters, such as a PWM signal, for the power optimizer 5-8 corresponding to photovoltaic module 5-11. When the light intensity changes, the PWM signal of 5-8 is adjusted to ensure that 5-11 always maximizes its output power. The power optimization process for other solar modules is similar.

[0054] In one specific embodiment, the photovoltaic module and the sensor do not necessarily have to be in a one-to-one correspondence. It is sufficient to select the sensor that best represents the specific module.

[0055] In one specific embodiment, see Figure 5 9-1 is the photovoltaic panel. 9-2 is the power optimization module, and 9-6 is the light intensity sensor. Figure 5 The optical sensor was replaced with a grating 9-3, and the processor 9-5 used lasers of different wavelengths to control different power optimizers. All control parameters were transmitted to each grating through the same optical fiber 9-4, and only lasers of the corresponding wavelengths could pass through the grating to reach the photodiode.

[0056] In one specific embodiment, see Figure 6 By adding a decoder, a register, and a driver circuit, all DC / DC circuits are controlled via a monochromatic laser through an optical fiber. 10-1 is the solar cell; 10-2 is the DC / DC circuit; 10-3 is a combination of decoder, register, and driver circuit. It decodes commands sent to itself and stores relevant parameters. These parameters are used to generate PWM waves to control the DC / DC circuit. 10-4 is the optical fiber; 10-5 is the central controller. 10-5 sends coded control commands and parameters via the optical fiber to the target decoder. Only the decoder at the corresponding address decodes the commands and parameters and generates the corresponding PWM wave to control the DC / DC circuit, thus achieving component matching. Different codes can control different power optimizers; 10-6 is a light sensor.

[0057] This embodiment utilizes several optical sensing heads, several optical fibers, a clustered section, and a camera. Each optical sensing head corresponds to one optical fiber. Each optical sensing head is connected to the first end of its corresponding optical fiber. The second ends of all optical fibers are connected to the first end of the clustered section. The camera is connected to the second end of the clustered section, and the camera is spaced at a preset distance from the clustered section. Specifically, the preset distance is the focusing distance of the camera. This invention collects sunlight through optical sensing heads, guides the light to the clustered section through optical fibers, and captures images of the clustered section using a camera, thus completing the collection of sunlight rays. Compared to collecting sunlight through a solar radiation sensor, this invention does not require additional circuitry. Based on the autonomous movement of sunlight, it completes the collection of sunlight rays, eliminating any malfunctions that could prevent the collection of sunlight rays and improving the anti-interference capability of sunlight light collection.

[0058] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A solar ray collecting device, characterized by, include: The system comprises several optical sensing heads, several optical fibers, a bundled section, and a camera; wherein each optical sensing head corresponds to one optical fiber. Each optical sensing head is connected to the first end of a corresponding optical fiber; each optical sensing head includes a housing and a light wavelength filter; the optical sensing head is disposed in several light acquisition areas; wherein each light acquisition area is the area with the highest light intensity selected based on the historical light intensity of the photovoltaic power station; several optical sensing heads are disposed in each light acquisition area; wherein, in a light acquisition area, the light wavelength filter of each optical sensing head is different from each other, the geographical location of each optical sensing head is the same, and the orientation of each optical sensing head is different from each other. The second end of all optical fibers is connected to the first end of the bundle section; The camera is positioned directly opposite the second end of the beam convergence section. Sunlight passes sequentially through the optical sensor head, optical fiber, and beam convergence section. Upon reaching the beam convergence section, the sunlight forms a light spot, allowing the camera to capture the light spot and obtain light spot data.

2. The solar ray collection apparatus of claim 1, wherein Also includes: A processor; wherein the processor is configured to receive the light spot data to obtain the illumination intensity of sunlight on the optical sensor head.

3. The solar ray collection apparatus of claim 2, wherein The processor is used to receive the light spot data to obtain the illumination intensity of sunlight on the optical sensor head, including: The processor corrects each light spot data in the light spot data to obtain a plurality of corrected light spot data; wherein, the light spot data includes a plurality of light spot data, and each light spot data is obtained by a light sensor head and an optical fiber; Data extraction is performed on the corrected light spot data to obtain the illumination wavelength and illumination intensity corresponding to each corrected light spot data.

4. The solar ray collection apparatus of claim 2, wherein The outer shell is made of transparent or semi-transparent material.

5. A photovoltaic power plant, characterized in that include: The device comprises a solar radiation harvesting apparatus, several photovoltaic modules, and several power optimizers; wherein the solar radiation harvesting apparatus uses the solar radiation harvesting device as described in any one of claims 2 to 4. The location of each photovoltaic module corresponds to the location of a power optimizer and the location of an optical sensor head of the solar light collection device; each photovoltaic module is connected to a power optimizer, and each power optimizer is connected to the processor of the solar light collection device. After the processor of the solar light acquisition device extracts the light wavelength and light intensity of each optical sensor head, it determines the strongest light direction corresponding to each optical sensor head based on the light wavelength and light intensity, and generates a PWM signal corresponding to each optical sensor head. Then, it transmits each PWM signal to the target power optimizer corresponding to each optical sensor head so that the target power optimizer adjusts the output impedance of the photovoltaic module.

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