Fireproof method and device for solar module, and computer medium

Abstract

The invention discloses a solar module fireproof method and device and a computer medium, and relates to the photovoltaic field, and the method comprises the steps: respectively obtaining the output voltage of a solar module and the input voltage of a combiner box input voltage channel corresponding to the solar module, and comparing the change relation of the two voltages, according to the application, the disconnection of the connection line between the solar module and the combiner box can be controlled in time, and the probability of fire risk is reduced.

Description

Technical Field

[0001] The present application relates to the photovoltaic field, and in particular to a solar module fire prevention method, device, and computer medium. Background Art

[0002] Solar panels are often easily deployed in areas with rich vegetation. When leakage, short circuit and other accidents occur in the electrical network from solar panels to the combiner box, it is very easy to cause a fire. Summary of the invention

[0003] The purpose of this application is to provide a solar module fire prevention method, device, and computer medium, which respectively obtain the output voltage of the solar module and the input voltage of the combiner box input voltage channel corresponding to the solar module, and judge the fire risk probability of the solar module by comparing the change relationship between the two voltages. This application can timely control the disconnection of the connection line between the solar module and the combiner box, reducing the probability of fire risk.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a solar panel fire prevention method, including a solar panel and a combiner box, characterized in that it includes:

[0006] Obtaining an output voltage of the solar panel, recorded as a first voltage;

[0007] Acquire an input voltage of an input voltage channel of a combiner box corresponding to the solar module, and record it as a second voltage;

[0008] By comparing the change relationship between the first voltage and the second voltage, the fire risk probability of the solar module is determined. When the fire risk probability of the solar module is greater than a preset value, the connection line between the solar module and the combiner box is controlled to be disconnected.

[0009] Preferably, the method for obtaining the first voltage includes obtaining an analog signal corresponding to the first voltage, converting it into a pulse quantity with a corresponding relationship, expressing it as the number of pulses per unit time, and recording it as a first digital signal; the method for obtaining the second voltage includes obtaining an analog signal corresponding to the second voltage, converting it into a pulse quantity with a corresponding relationship, expressing it as the number of pulses per unit time, and recording it as a second digital signal.

[0010] Preferably, judging the fire risk probability of the solar module by comparing the change relationship between the first voltage and the second voltage comprises:

[0011] Determine in real time the difference between the first digital signal and the second digital signal, and record it as a characteristic value, wherein the characteristic value = the second digital signal - the first digital signal;

[0012] Record and draw a curve of the characteristic value changing over time, and obtain the slope of each point of the curve;

[0013] The risk probability of fire is determined based on any parameter or a combination of the size of the characteristic value, the size of the slope value, the size of the characteristic value within a preset time period, the size of the slope value within a preset time period.

[0014] Preferably, when the fire risk probability of the solar energy component is greater than a preset value, controlling the connection line between the solar energy component and the combiner box to be disconnected comprises:

[0015] When the characteristic value is greater than the first characteristic preset value and less than the second characteristic preset value, it is determined whether the slope value is greater than the first slope preset value within the first preset time, and if so, the connection line between the solar panel and the combiner box is controlled to be disconnected;

[0016] When the characteristic value is greater than the second characteristic preset value and less than the third characteristic preset value, it is determined whether the slope value is greater than the second slope preset value within the second preset time, and if so, the connection line between the solar panel and the combiner box is controlled to be disconnected;

[0017] When the characteristic value is greater than the third characteristic preset value, determining whether the characteristic value is continuously greater than the third characteristic preset value for a period greater than the third preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected;

[0018] When the slope value is greater than the third slope preset value, determining whether the time for which the slope value is continuously greater than the third slope preset value is greater than a fourth preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected;

[0019] The first feature preset value is smaller than the second feature preset value, and the second feature preset value is smaller than the third feature preset value.

[0020] Preferably, the frequency of acquiring the output voltage of the solar module is not less than 1 kHz / s.

[0021] Preferably, the conversion into pulse quantities having a corresponding relationship is achieved by a voltage-frequency conversion circuit, and the voltage-frequency conversion circuit includes a voltage-frequency chip for converting a voltage signal into a frequency signal.

[0022] In a second aspect, the present application provides a solar module fire prevention device for executing any one of the above optional solar module fire prevention methods, comprising a first module and a second module, wherein the first module is used to obtain the output voltage of the solar module, and the second module is used to obtain the input voltage of the combiner box input voltage channel corresponding to the solar module; the second module is also used to compare the change relationship between the first voltage and the second voltage to determine the fire risk probability of the solar module; the first module is also used to control the disconnection of the connection line between the solar module and the combiner box;

[0023] Optionally, the first module includes a first main control board, a first switch, and a first voltage converter; the second module includes a second main control board, a second switch, and a second voltage converter;

[0024] The first voltage converter is used to obtain the output voltage of the solar panel and send a voltage simulation signal to the first main control board;

[0025] The first main control board is used to process and analyze the electrical signal, receive and send data information through the first wireless communication module, and control the state of the first switch;

[0026] The second voltage converter is used to obtain the input voltage of the combiner box input voltage channel corresponding to the solar module, and send the voltage simulation signal to the second main control board;

[0027] The second main control board is used to process and analyze the electrical signal, receive and send data information through the second wireless communication module, and control the state of the second switch.

[0028] Optionally, the first module further includes a first wireless communication module, which is electrically connected to the first main control board; the second module further includes a second wireless communication module, which is electrically connected to the second main control board.

[0029] On the third aspect, the present application also provides a computer medium for storing a program for executing any one of the above-mentioned optional solar module fire prevention methods, which is composed of several modules, each module executes a part of the program, and realizes the execution of the solar module fire prevention method alone or in cooperation with each other.

[0030] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0031] The present application provides a solar panel fire prevention method. Solar panels are often easily deployed in areas with rich vegetation. When leakage, short circuit and other accidents occur in the electrical network from the solar panel to the junction box, fires are very likely to occur. The present application provides a solar panel fire prevention method that is simple and reliable, has high recognition sensitivity, and requires few resources for the execution equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the principle of a device for executing a solar panel fire prevention method in one embodiment of the present application; DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] In an embodiment of the present invention, a solar module fire prevention device is provided, comprising a first module and a second module, wherein the first module is used to obtain the output voltage of the solar module, and the second module is used to obtain the input voltage of the input voltage channel of the combiner box corresponding to the solar module; the second module is also used to compare the change relationship between the first voltage and the second voltage to determine the fire risk probability of the solar module; the first module is also used to control the disconnection of the connection line between the solar module and the combiner box.

[0037] As attached Figure 1 As shown, the main control board, the switch, and the voltage converter in the first module are respectively the first main control board, the first switch, and the first voltage converter; the main control board, the switch, and the voltage converter in the second module are respectively the second main control board, the second switch, and the second voltage converter.

[0038] The voltage converter (including the first voltage converter and the second voltage converter) may adopt a Hall sensor or a fluxgate sensor, or other devices / equipment / modules that can directly collect the voltage of the line to obtain an analog electrical signal.

[0039] For example, a fluxgate sensor is used to convert the voltage signal into a small voltage signal of about 3.3V and input it into the first main control board.

[0040] The first main control board includes programs and circuits for processing the electrical signal input by the first voltage converter, such as a voltage-frequency conversion circuit, which converts the voltage signal into a voltage pulse signal to realize the digitization of the analog signal, reduce the difficulty of subsequent programs or software in processing the electrical signal, and reduce the consumption of CPU resources in the signal processing process.

[0041] In the prior art, in the process of processing voltage analog signals, it is necessary to convert the voltage or the analog signal of the voltage into a digital signal through an A / D chip, and cooperate with the corresponding CPU and the internal A / D conversion program to realize data processing. The operation of the corresponding program and the CPU often needs to rely on the working state of the crystal oscillator, and the crystal oscillator itself is susceptible to electromagnetic interference, which may cause errors or deviations in the processing results. In addition, in the processing scheme of the prior art, it is impossible to avoid the analog-to-digital conversion processing process based on complex programs and the support of corresponding components, so the requirements on software and hardware resources are relatively high.

[0042] In this embodiment, the processing process of the main control board directly converts the voltage analog signal into a digital signal through the voltage frequency chip. There is no need to set up an A / D chip or a corresponding A / D conversion program, which reduces the consumption of hardware resources and simplifies the corresponding program design work.

[0043] The second main control board includes a program and circuit for processing the electrical signal input by the second voltage converter, which is similar to the processing process of the first main control board and will not be repeated here.

[0044] In the second embodiment of the present invention, the first module further includes a first wireless communication module electrically connected to the first main control board; the second module further includes a second wireless communication module electrically connected to the second main control board.

[0045] The communication between the first module and the second module can also be achieved through other media, such as optical fiber, 5GVPN / IPSEE tunnel, microwave, communication cable, etc.

[0046] In the third embodiment of the present invention, the first module and / or the second module supports inputting preset parameters, including a first characteristic preset value, a second characteristic preset value, a third characteristic preset value, a first slope preset value, a second slope preset value, a third slope preset value, a first preset time, a second preset time, a third preset time, and a fourth preset time; the first module and / or the second module stores a data calculation program for calculating characteristic values ​​and slopes, wherein the characteristic value = second digital signal - first digital signal; wherein the first digital signal is a digital quantity representation value corresponding to the voltage value processed by the first main control board, and the second digital signal is a digital quantity representation value corresponding to the voltage value processed by the second main control board.

[0047] The slope is the slope of each point in the curve of the characteristic value changing over time.

[0048] The risk probability of fire is determined based on any parameter or a combination of the size of the characteristic value, the size of the slope value, the size of the characteristic value within a preset time period, the size of the slope value within a preset time period.

[0049] When the characteristic value is greater than the first characteristic preset value and less than the second characteristic preset value, it is determined whether the slope value is greater than the first slope preset value within the first preset time, and if so, the connection line between the solar panel and the combiner box is controlled to be disconnected;

[0050] When the characteristic value is greater than the second characteristic preset value and less than the third characteristic preset value, it is determined whether the slope value is greater than the second slope preset value within the second preset time. If so, the connection line between the solar panel and the combiner box is disconnected;

[0051] When the characteristic value is greater than the third characteristic preset value, determining whether the characteristic value is continuously greater than the third characteristic preset value for a period greater than the third preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected;

[0052] When the slope value is greater than the third slope preset value, determining whether the time for which the slope value continues to be greater than the third slope preset value is greater than a fourth preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected;

[0053] The first characteristic preset value is smaller than the second characteristic preset value, and the second characteristic preset value is smaller than the third characteristic preset value.

[0054] The principle of judging the risk probability of fire is to timely find the voltage difference between the solar panels and the combiner box through the synchronous comparison of the voltage data, and the law of the difference change. Since solar panels are often easily deployed in areas with rich vegetation, they are greatly affected by external environmental factors. For example, some environments are often in a state of high humidity and poor insulation performance. The voltage difference can feedback the grounding and leakage conditions of the components that transmit the voltage, as well as the duration, degree, and frequency of each condition. Through the feedback of these data, the probability of fire can be analyzed. For example, when the voltage difference is large, it means that the line has a serious grounding or short circuit or other faults. At this time, the probability of fire is high. When the difference is within a certain range, but only occurs occasionally and lasts for a short time, it means that it is only caused by environmental influences. At this time, the general situation of fire is small. When the difference is small, but the value shows a continuous and stable growth, it means that the aging degree of the corresponding equipment is constantly deepening, indicating that after a period of time, the probability of fire will be significantly increased. Through the above method, various state changes of data can be discovered in time, and control processing or alarm warning can be carried out in advance to prevent the occurrence of fire.

[0055] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0056] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0057] It should be noted that the data involved in this application (including but not limited to data used for analysis, data stored, data displayed, etc.) are all information and data fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0058] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0059] The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., but is not limited thereto. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but is not limited thereto.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for preventing fire of a solar panel, comprising a solar panel and a combiner box, characterized in that: include: Obtaining an output voltage of the solar panel, recorded as a first voltage; Acquire an input voltage of an input voltage channel of a combiner box corresponding to the solar module, and record it as a second voltage; By comparing the change relationship between the first voltage and the second voltage, the fire risk probability of the solar module is determined. When the fire risk probability of the solar module is greater than a preset value, the connection line between the solar module and the combiner box is controlled to be disconnected.

2. The solar module fire prevention method according to claim 1, characterized in that: The method for obtaining the first voltage includes obtaining an analog signal corresponding to the first voltage, converting the analog signal into a pulse quantity having a corresponding relationship, and expressing the analog signal in terms of the number of pulses per unit time, which is recorded as a first digital signal; The method for acquiring the second voltage includes acquiring an analog signal corresponding to the second voltage, converting the analog signal into a corresponding pulse quantity, and expressing the pulse quantity in a unit time as a second digital signal.

3. The solar module fire prevention method according to claim 2, characterized in that: The determining the fire risk probability of the solar module by comparing the change relationship between the first voltage and the second voltage includes: Determine in real time the difference between the first digital signal and the second digital signal, and record it as a characteristic value, wherein the characteristic value = the second digital signal - the first digital signal; Record and draw a curve of the characteristic value changing over time, and obtain the slope of each point of the curve; The risk of fire is determined based on any parameter or a combination of the size of the characteristic value, the size of the slope value, the size of the characteristic value within a preset time period, and the size of the slope value within a preset time period.

4. The solar module fire prevention method according to claim 3, characterized in that: When the fire risk probability of the solar panel is greater than a preset value, controlling the connection line between the solar panel and the combiner box to be disconnected includes: When the characteristic value is greater than the first characteristic preset value and less than the second characteristic preset value, it is determined whether the slope value is greater than the first slope preset value within the first preset time, and if so, the connection line between the solar panel and the combiner box is controlled to be disconnected; When the characteristic value is greater than the second characteristic preset value and less than the third characteristic preset value, it is determined whether the slope value is greater than the second slope preset value within the second preset time, and if so, the connection line between the solar panel and the combiner box is controlled to be disconnected; When the characteristic value is greater than the third characteristic preset value, determining whether the characteristic value is continuously greater than the third characteristic preset value for a period greater than the third preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected; When the slope value is greater than the third slope preset value, determining whether the time for which the slope value is continuously greater than the third slope preset value is greater than a fourth preset time, and if so, controlling the connection line between the solar panel and the combiner box to be disconnected; The first feature preset value is smaller than the second feature preset value, and the second feature preset value is smaller than the third feature preset value.

5. The solar module fire prevention method according to claim 1, characterized in that: The frequency of obtaining the output voltage of the solar panel is not less than 1 kHz / s.

6. The solar module fire prevention method according to claim 2, characterized in that: The conversion into pulse quantities having a corresponding relationship is achieved through a voltage-frequency conversion circuit, wherein the voltage-frequency conversion circuit includes a voltage-frequency chip for converting a voltage signal into a frequency signal.

7. A solar panel fire protection device, characterized in that: Used to execute any one of the methods of claims 1-6, comprising a first module and a second module, wherein the first module is used to obtain the output voltage of a solar module, and the second module is used to obtain the input voltage of an input voltage channel of a combiner box corresponding to the solar module; the second module is also used to compare the change relationship between the first voltage and the second voltage to determine the fire risk probability of the solar module; The first module is also used to control the disconnection of the connection line between the solar energy component and the combiner box.

8. The solar module fire protection device according to claim 7, characterized in that: The first module includes a first main control board, a first switch, and a first voltage converter; the second module includes a second main control board, a second switch, and a second voltage converter; The first voltage converter is used to obtain the output voltage of the solar panel and send a voltage simulation signal to the first main control board; The first main control board is used to process and analyze the electrical signal, receive and send data information through the first wireless communication module, and control the state of the first switch; The second voltage converter is used to obtain the input voltage of the combiner box input voltage channel corresponding to the solar module, and send the voltage simulation signal to the second main control board; The second main control board is used to process and analyze the electrical signal, receive and send data information through the second wireless communication module, and control the state of the second switch.

9. The solar module fire protection device according to claim 8, characterized in that: The first module further includes a first wireless communication module, which is electrically connected to the first main control board; the second module further includes a second wireless communication module, which is electrically connected to the second main control board.

10. A computer medium, characterized in that Used to store a control program for executing the solar module fire prevention method according to claim 4, the medium is composed of a plurality of medium modules, each of which executes a part of the program, and realizes the execution of the solar module fire prevention method alone or in cooperation with each other.

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