Environmentally friendly photovoltaic power station combiner box probability extraction system

Abstract

The present invention relates to an environmentally friendly photovoltaic power station combiner box probability extraction system, comprising: a dynamic shooting device, arranged inside a combiner box serving a photovoltaic power station, for determining the frame rate value of a video image shot inside the combiner box in the next time interval with the current moment as the starting moment based on the time length from the last time the combiner box door was closed to the current moment; a fire warning device, for calculating the probability of a fire in the combiner box based on the internal volume of the combiner box and the current reference number, and issuing a fire warning signal when the calculated probability exceeds the limit. Through the present invention, the probability of a fire in the combiner box can be calculated based on the internal volume of the combiner box and the number of fibers in the combiner box, wherein the value of the calculated probability is inversely correlated with the internal volume of the combiner box and positively correlated with the number of fibers in the combiner box, thereby completing the intelligent fire warning operation based on the number of fibers inside the combiner box of the photovoltaic power station.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic power stations, and in particular to a probability extraction system for combiner boxes of environmentally friendly photovoltaic power stations. Background Art

[0002] The combiner box is a wiring device that ensures the orderly connection and combiner function of photovoltaic modules in the photovoltaic power generation system. This device can ensure that the photovoltaic system is easy to cut off the circuit during maintenance and inspection, and reduce the scope of power outage when the photovoltaic system fails.

[0003] A combiner box means that users can connect a certain number of photovoltaic cells of the same specifications in series to form photovoltaic strings, and then connect several photovoltaic strings in parallel to the photovoltaic combiner box. After the photovoltaics are combined in the photovoltaic combiner box, they are used together through a controller, a DC distribution cabinet, a photovoltaic inverter, and an AC distribution cabinet to form a complete photovoltaic power generation system and achieve grid connection with the city power grid.

[0004] For the combiner box at the location of the photovoltaic power station, the more fibers there are, the greater the probability of fire, and the smaller the internal volume of the combiner box, the greater the probability of fire. However, it is difficult to calculate the analysis mechanism of the probability of fire in the combiner box based on the internal volume of the combiner box and the number of fibers in the prior art, resulting in the inability to accurately obtain the fire information of each combiner box, and the corresponding fire strategy determines the customized basic data. Summary of the invention

[0005] In order to solve the technical problems in the related fields, the present invention provides an environmentally friendly photovoltaic power station combiner box probability extraction system, which can calculate the probability of fire in the combiner box based on the internal volume of the combiner box and the number of fibers in the combiner box, and issue a fire warning signal when the calculated probability exceeds a set probability threshold, wherein the calculated probability value is inversely correlated with the internal volume of the combiner box and positively correlated with the number of fibers in the combiner box, thereby completing the intelligent fire warning operation based on the number of fibers inside the photovoltaic power station combiner box.

[0006] According to the present invention, a probability extraction system for combiner boxes in an environmentally friendly photovoltaic power station is provided, the system comprising:

[0007] A dynamic shooting device is arranged inside a combiner box serving a photovoltaic power station, and is used to determine a frame rate value of a video image shot inside the combiner box in a next time interval with the current moment as the starting moment based on the time length from the last time the combiner box door was closed to the current moment, so as to obtain a video image corresponding to each shooting moment;

[0008] An interpolation processing device, arranged inside the combiner box and connected to the dynamic shooting device, is used to perform bicubic interpolation processing of a 16 pixel×16 pixel neighborhood on the received video picture to obtain and output a corresponding interpolation processing image;

[0009] A directional filtering device, connected to the interpolation processing device, for performing directional filtering processing on the received interpolation processing image to obtain and output a corresponding directional filtering image;

[0010] A real-time enhancement device, connected to the directional filtering device, for performing image frequency domain enhancement processing on the received directional filtered image to obtain and output a corresponding real-time enhanced image;

[0011] a number detection device, arranged inside the junction box and connected to the real-time enhancement device, for detecting, from the real-time enhancement image, image blocks having the same shape as the preset reference pattern corresponding to the single fiber according to the preset reference pattern corresponding to the single fiber, performing a size normalization process on each image block to obtain a corresponding typical image block, wherein the size of the typical image block is consistent with the preset reference pattern corresponding to the single fiber, obtaining pixel values ​​corresponding to pixel points of the typical image block as first-category pixel values, obtaining pixel values ​​corresponding to pixel points of the preset reference pattern corresponding to the single fiber as first-category pixel values, performing pixel-by-pixel difference processing on the typical image block and the standard object pattern to obtain a difference processing screen, counting the total number of pixel points with a pixel value of 0 in the difference processing screen as a reference statistical number, and confirming that the image block is an imaging image block of a single fiber when the reference statistical number exceeds a limit, obtaining the number of imaging image blocks of the single fiber in the real-time enhancement image as the current reference number output;

[0012] a fire warning device, connected to the number detection device, for calculating the probability of fire in the combiner box based on the internal volume of the combiner box and the current reference number, and issuing a fire warning signal when the calculated probability exceeds a set probability threshold;

[0013] Wherein, based on the time length from the last time the door of the combiner box was closed to the current time, determining the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time, so as to obtain the video picture corresponding to each shooting time, the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time is greater;

[0014] Among them, the probability of fire in the combiner box is calculated based on the internal volume of the combiner box and the current reference number, and when the calculated probability exceeds the set probability threshold, a fire warning signal is issued, including: the numerical value of the calculated probability is inversely correlated with the internal volume of the combiner box and positively correlated with the current reference number.

[0015] It can be seen that the present invention has at least the following main inventive concepts:

[0016] Firstly: according to the preset reference pattern corresponding to the single fiber, each image block having the same shape as the preset reference pattern corresponding to the single fiber is detected from the real-time enhanced image obtained after the targeted optimization process;

[0017] Secondly: performing normalization processing on each image block to the preset reference pattern size corresponding to the single fiber to obtain a corresponding typical image block, the typical image block is consistent with the preset reference pattern size corresponding to the single fiber, obtaining each pixel value corresponding to each pixel point of the typical image block as each first-category pixel value, obtaining each pixel value corresponding to each pixel point of the preset reference pattern corresponding to the single fiber as each first-category pixel value, performing pixel-by-pixel difference processing on the typical image block and the standard object pattern to obtain a difference processing screen, counting the total number of pixels with a pixel value of 0 in the difference processing screen as a reference statistical number, and when the reference statistical number exceeds a limit, confirming that the image block is an imaging image block of a single fiber, obtaining the number of imaging image blocks of a single fiber in the real-time enhanced image as the current reference number output, thereby using the secondary visual data confirmation mode to complete the confirmation of the existence of each fiber;

[0018] Again: the probability of fire in the combiner box is calculated based on the internal volume of the combiner box and the current reference number, and when the calculated probability exceeds the set probability threshold, a fire warning signal is issued, wherein the calculated probability value is inversely correlated with the internal volume of the combiner box and positively correlated with the current reference number, thereby completing the intelligent fire warning operation based on the number of fibers inside the combiner box of the photovoltaic power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The embodiments of the present invention will be described below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a structural block diagram of a probability extraction system of a combiner box of an environmentally friendly photovoltaic power station according to a primary embodiment of the present invention.

[0021] Figure 2 It is a structural block diagram of a probability extraction system of a combiner box of an environmentally friendly photovoltaic power station according to a secondary embodiment of the present invention.

[0022] Figure 3 1 is a structural block diagram of a probability extraction system for a combiner box of an environmentally friendly photovoltaic power station according to another embodiment of the present invention. DETAILED DESCRIPTION

[0023] The embodiment of the probability extraction system of the combiner box of the environmentally friendly photovoltaic power station of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Figure 1 This is a structural block diagram of a probability extraction system for a combiner box of an environmentally friendly photovoltaic power station according to a primary embodiment of the present invention. The system includes:

[0025] A dynamic shooting device is arranged inside a combiner box serving a photovoltaic power station, and is used to determine a frame rate value of a video image shot inside the combiner box in a next time interval with the current moment as the starting moment based on the time length from the last time the combiner box door was closed to the current moment, so as to obtain a video image corresponding to each shooting moment;

[0026] For example, a dynamic shooting device is arranged inside a combiner box serving a photovoltaic power station, and is used to determine a frame rate value of a video image shot inside the combiner box in a next time interval with the current moment as the starting moment based on the time length from the last time the combiner box door was closed to the current moment, so as to obtain a video image corresponding to each shooting moment, including: a built-in photoelectric sensor, a time detection unit, and a frame rate adjustment unit in the dynamic shooting device;

[0027] An interpolation processing device, arranged inside the combiner box and connected to the dynamic shooting device, is used to perform bicubic interpolation processing of a 16 pixel×16 pixel neighborhood on the received video picture to obtain and output a corresponding interpolation processing image;

[0028] A directional filtering device, connected to the interpolation processing device, for performing directional filtering processing on the received interpolation processing image to obtain and output a corresponding directional filtering image;

[0029] A real-time enhancement device, connected to the directional filtering device, for performing image frequency domain enhancement processing on the received directional filtered image to obtain and output a corresponding real-time enhanced image;

[0030] a number detection device, arranged inside the junction box and connected to the real-time enhancement device, for detecting, from the real-time enhancement image, image blocks having the same shape as the preset reference pattern corresponding to the single fiber according to the preset reference pattern corresponding to the single fiber, performing a size normalization process on each image block to obtain a corresponding typical image block, wherein the size of the typical image block is consistent with the preset reference pattern corresponding to the single fiber, obtaining pixel values ​​corresponding to pixel points of the typical image block as first-category pixel values, obtaining pixel values ​​corresponding to pixel points of the preset reference pattern corresponding to the single fiber as first-category pixel values, performing pixel-by-pixel difference processing on the typical image block and the standard object pattern to obtain a difference processing screen, counting the total number of pixel points with a pixel value of 0 in the difference processing screen as a reference statistical number, and confirming that the image block is an imaging image block of a single fiber when the reference statistical number exceeds a limit, obtaining the number of imaging image blocks of the single fiber in the real-time enhancement image as the current reference number output;

[0031] a fire warning device, connected to the number detection device, for calculating the probability of fire in the combiner box based on the internal volume of the combiner box and the current reference number, and issuing a fire warning signal when the calculated probability exceeds a set probability threshold;

[0032] Wherein, based on the time length from the last time the door of the combiner box was closed to the current time, determining the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time, so as to obtain the video picture corresponding to each shooting time, the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time is greater;

[0033] Wherein, the probability of fire in the combiner box is calculated based on the internal volume of the combiner box and the current reference number, and when the calculated probability exceeds a set probability threshold, a fire warning signal is issued, including: the value of the calculated probability is inversely correlated with the internal volume of the combiner box and positively correlated with the current reference number;

[0034] Wherein, the number detection device is also used to confirm that the image block does not belong to the imaging image block of a single fiber when the reference statistical number exceeds the limit, and the image block does not participate in the accumulation of the number of imaging image blocks of a single fiber in the real-time enhanced image;

[0035] Wherein, the fire warning device is also used to stop sending the fire warning signal when the calculated probability does not exceed the set probability threshold.

[0036] Figure 2 It is a structural block diagram of a probability extraction system of a combiner box of an environmentally friendly photovoltaic power station according to a secondary embodiment of the present invention.

[0037] Compared to Figure 1 , Figure 2 The environmentally friendly photovoltaic power station combiner box probability extraction system can also include:

[0038] A parallel data interface, for connecting the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively, to receive data from the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively, and to send parallel data from a parallel data bus to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively;

[0039] Among them, the parallel data interface is used for connecting the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, so as to receive data from the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, and send the parallel data from the parallel data bus to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, including: the parallel data bus is one of a 16-bit parallel data bus and a 32-bit parallel data bus.

[0040] Figure 3 1 is a structural block diagram of a probability extraction system for a combiner box of an environmentally friendly photovoltaic power station according to another embodiment of the present invention.

[0041] Compared to Figure 2 , Figure 3 The environmentally friendly photovoltaic power station combiner box probability extraction system can also include:

[0042] A user control interface is connected to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively, and is used to receive control instructions from a user to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively;

[0043] The interpolation processing device, the directional filtering device, the real-time enhancement device, and the number detection device are connected to the same quartz oscillation device to obtain the timing data provided by the quartz oscillation device, and the interpolation processing device, the directional filtering device, the real-time enhancement device, and the number detection device are respectively connected to the same content storage chip, and the content storage chip is one of a FLASH flash memory, an SDRAM memory chip, and a DDR memory chip;

[0044] The interpolation processing device, the direction filtering device, the real-time enhancement device and the number detection device are respectively connected to the same IIC control bus, and are used to receive various control commands sent by the IIC control bus, and the various control commands are used to respectively configure various working parameters of the interpolation processing device, the direction filtering device, the real-time enhancement device and the number detection device;

[0045] The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the IIC control bus, and are used to receive various control instructions sent through the IIC control bus;

[0046] The interpolation processing device, the directional filtering device, the real-time enhancement device, and the number detection device are respectively connected to the same MCU controller, and are used for switching the interpolation processing device, the directional filtering device, the real-time enhancement device, and the number detection device between the sleep mode and the working mode under the control of the same MCU controller;

[0047] Among them, the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the same MCU controller, and are used for switching the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device between the sleep mode and the working mode under the control of the same MCU controller, including: the same MCU controller is designed based on the ARM13 core.

[0048] In addition, in the probability extraction system of the junction box of the environmentally friendly photovoltaic power station, each image block having the same shape as the preset reference pattern corresponding to the single fiber is detected from the real-time enhanced image according to the preset reference pattern corresponding to the single fiber, and a size normalization process of the preset reference pattern corresponding to the single fiber is performed on each image block to obtain a corresponding typical image block, and the typical image block is consistent in size with the preset reference pattern corresponding to the single fiber, including: the preset reference pattern corresponding to the single fiber is in JPEG encoding format, and a numerical simulation mode is used to implement the process of normalizing the size of the preset reference pattern corresponding to the single fiber for each image block to obtain the corresponding typical image block, and the typical image block is simulated in the process of having the size of the preset reference pattern corresponding to the single fiber consistent with the preset reference pattern corresponding to the single fiber.

[0049] The environmentally friendly photovoltaic power station combiner box probability extraction system of the present invention can calculate the probability of fire in the combiner box based on the internal volume of the combiner box and the number of fibers in the combiner box, in order to address the technical problem in the prior art of the lack of an intelligent early warning mechanism for the fire probability of the photovoltaic power station combiner box. The probability of fire in the combiner box can be calculated based on the internal volume of the combiner box and the number of fibers in the combiner box, wherein the calculated probability value is inversely correlated with the internal volume of the combiner box and positively correlated with the number of fibers in the combiner box, thereby completing the intelligent fire early warning operation based on the number of fibers inside the photovoltaic power station combiner box.

[0050] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications, equivalent structures and functions.

Claims

1. A probability extraction system for combiner boxes of environmentally friendly photovoltaic power stations, characterized in that: The system comprises: A dynamic shooting device is arranged inside a combiner box serving a photovoltaic power station, and is used to determine a frame rate value of a video image shot inside the combiner box in a next time interval with the current moment as the starting moment based on the time length from the last time the combiner box door was closed to the current moment, so as to obtain a video image corresponding to each shooting moment; An interpolation processing device, arranged inside the combiner box and connected to the dynamic shooting device, is used to perform bicubic interpolation processing of a 16 pixel×16 pixel neighborhood on the received video picture to obtain and output a corresponding interpolation processing image; A directional filtering device, connected to the interpolation processing device, for performing directional filtering processing on the received interpolation processing image to obtain and output a corresponding directional filtering image; A real-time enhancement device, connected to the directional filtering device, for performing image frequency domain enhancement processing on the received directional filtered image to obtain and output a corresponding real-time enhanced image; a number detection device, arranged inside the junction box and connected to the real-time enhancement device, for detecting, from the real-time enhancement image, image blocks having the same shape as the preset reference pattern corresponding to the single fiber according to the preset reference pattern corresponding to the single fiber, performing a size normalization process on each image block to obtain a corresponding typical image block, wherein the size of the typical image block is consistent with the preset reference pattern corresponding to the single fiber, obtaining pixel values ​​corresponding to pixel points of the typical image block as first-category pixel values, obtaining pixel values ​​corresponding to pixel points of the preset reference pattern corresponding to the single fiber as first-category pixel values, performing pixel-by-pixel difference processing on the typical image block and the standard object pattern to obtain a difference processing screen, counting the total number of pixel points with a pixel value of 0 in the difference processing screen as a reference statistical number, and confirming that the image block is an imaging image block of a single fiber when the reference statistical number exceeds a limit, obtaining the number of imaging image blocks of the single fiber in the real-time enhancement image as the current reference number output; a fire warning device, connected to the number detection device, for calculating the probability of fire in the combiner box based on the internal volume of the combiner box and the current reference number, and issuing a fire warning signal when the calculated probability exceeds a set probability threshold; Wherein, based on the time length from the last time the door of the combiner box was closed to the current time, determining the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time, so as to obtain the video picture corresponding to each shooting time, the frame rate value of the video picture shot inside the combiner box in the next time interval with the current time as the starting time is greater; Among them, the probability of fire in the combiner box is calculated based on the internal volume of the combiner box and the current reference number, and when the calculated probability exceeds the set probability threshold, a fire warning signal is issued, including: the numerical value of the calculated probability is inversely correlated with the internal volume of the combiner box and positively correlated with the current reference number.

2. The environmentally friendly photovoltaic power station combiner box probability extraction system according to claim 1, characterized in that: The number detection device is also used to confirm that the image block does not belong to the imaging image block of a single fiber when the reference statistical number exceeds the limit, and the image block does not participate in the accumulation of the number of imaging image blocks of a single fiber in the real-time enhanced image; Wherein, the fire warning device is also used to stop sending the fire warning signal when the calculated probability does not exceed the set probability threshold.

3. The environmentally friendly photovoltaic power station combiner box probability extraction system as claimed in claim 2, characterized in that: The system further comprises: A parallel data interface, for connecting the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively, to receive data from the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively, and to send parallel data from a parallel data bus to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, respectively; Among them, the parallel data interface is used for connecting the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, so as to receive data from the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, and send the parallel data from the parallel data bus to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device respectively, including: the parallel data bus is one of a 16-bit parallel data bus and a 32-bit parallel data bus.

4. The environmentally friendly photovoltaic power station combiner box probability extraction system as claimed in claim 3, characterized in that: The system further comprises: The user control interface is respectively connected to the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device, and is used to receive user control instructions for the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device.

5. The environmentally friendly photovoltaic power station combiner box probability extraction system according to any one of claims 2 to 4, characterized in that: The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are connected to the same quartz oscillation device to obtain the timing data provided by the quartz oscillation device, and the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the same content storage chip, and the content storage chip is one of a FLASH flash memory, an SDRAM memory chip and a DDR memory chip.

6. The environmentally friendly photovoltaic power station combiner box probability extraction system according to any one of claims 2 to 4, characterized in that: The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the same IIC control bus, and are used to receive various control commands sent by the IIC control bus, and the various control commands are used to respectively configure various working parameters of the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device.

7. The environmentally friendly photovoltaic power station combiner box probability extraction system according to claim 6, characterized in that: The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the IIC control bus and are used to receive various control instructions sent through the IIC control bus.

8. The environmentally friendly photovoltaic power station combiner box probability extraction system according to any one of claims 2 to 4, characterized in that: The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the same MCU controller, and are used for switching the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device between the sleep mode and the working mode under the control of the same MCU controller.

9. The environmentally friendly photovoltaic power station combiner box probability extraction system as claimed in claim 8, characterized in that: The interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device are respectively connected to the same MCU controller, and are used for switching the interpolation processing device, the directional filtering device, the real-time enhancement device and the number detection device between the sleep mode and the working mode under the control of the same MCU controller, including: the same MCU controller is designed based on the ARM13 core.

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