Early warning system of photovoltaic substation

Abstract

The utility model discloses an early warning system of a photovoltaic transformer substation. The system comprises a plurality of acquisition terminals and a monitoring terminal, an infrared array sensor is used for acquiring infrared image data of a plurality of target positions in the photovoltaic transformer substation, and a first processing module judges whether the temperatures of the plurality of target positions in the photovoltaic transformer substation are higher than a set threshold value or not; the first communication module is used for sending the infrared image data and the temperature judgment result to the monitoring terminal; the monitoring terminal comprises a second communication module, the second communication module is used for receiving the infrared image data and the temperature judgment result sent by the first communication module, and a second processing module controls a display module to present the infrared image data of a plurality of target positions in the photovoltaic substation. And when the temperature of any target position in the photovoltaic substation is higher than a set threshold value, the early warning unit is controlled to send out an early warning signal. According to the utility model, an early warning signal can be output when the temperature is higher than a set threshold value, and a better fire prevention effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic substation early warning technical field, concretely relates to a photovoltaic substation early warning system. BACKGROUND

[0002] Photovoltaic substation is used to the direct current voltage of solar module square array output is converged, and is through the inverter module conversion AC voltage, then carries out the grid or directly to the alternating current power supply area power supply device, is applied to the end link of photovoltaic power generation process. In a photovoltaic power generation system, the number of photovoltaic substation is related to the power generation power of entire photovoltaic power generation system, and the capacity of general photovoltaic substation is about 500kVA, therefore, the total power generation power of photovoltaic power generation system is greater, then needs to adopt more photovoltaic substation.

[0003] Fire monitoring alarm is the necessary monitoring project of photovoltaic substation, and currently generally adopts fire detection module to realize fire monitoring alarm. But fire alarm module alarm can only alarm after the fire occurs, informs relevant personnel to take fire extinguishing measures as soon as possible, and cannot realize the prevention of fire occurrence. How to simultaneously carry out effective fire monitoring and early warning to multiple photovoltaic substations is the technical problem to be solved by the person skilled in the art. UTILITARIAN CONTENT

[0004] The utility model aims at the deficiency existing in prior art, and provides a photovoltaic substation early warning system.

[0005] In order to realize the above-mentioned purpose, the utility model provides a photovoltaic substation early warning system, including multiple collection terminals and a monitoring terminal, the collection terminal includes first processing module, the first processing module is connected with multiple infrared array sensors, the infrared array sensor is used to collect the infrared image data of multiple target positions in photovoltaic substation, and sends the collected infrared image data to first processing module, the first processing module judges whether the temperature of multiple target positions in photovoltaic substation is higher than the set threshold according to the received infrared image data, and it is connected with first communication module, the first communication module is used to send infrared image data and temperature judgment result to monitoring terminal;

[0006] The monitoring terminal includes second communication module, the second communication module is used to receive the infrared image data and temperature judgment result sent by first communication module, the second communication module is connected with second processing module, the second processing module is connected with display module and early warning unit, the second processing module controls display module to present the infrared image data of multiple target positions in photovoltaic substation, and when the temperature of any target position in photovoltaic substation is higher than the set threshold, controls early warning unit to send early warning signal.

[0007] Further, the first processing module is further connected with a first storage module, the second processing module is further connected with a second storage module, and the first storage module and the second storage module are used to store infrared image data and temperature judgment results.

[0008] Further, the first processing module and the second processing module are connected with a first power module and a second power module respectively, and the first power module and the second power module are used to provide power supply for the acquisition terminal and the monitoring terminal respectively.

[0009] Further, the first communication module and the second communication module are LoRa modules.

[0010] Further, the first processing module and the second processing module are STM32 series single-chip microcomputers.

[0011] Further, the infrared array sensor is an MLX90640 model.

[0012] Further, the first storage module and the second storage module are SD cards, and the first storage module and the second storage module are connected with the first processing module and the second processing module respectively through SDIO interfaces.

[0013] Further, the first processor is further connected with a man-machine interaction module.

[0014] Further, the early warning unit comprises a driving circuit and an early warning device connected with the driving circuit, the driving circuit comprises a resistor R1 connected with the second processing module at one end, the other end of the resistor R1 is connected with the base of a triode Q1, the emitter of the triode Q1 is connected with the ground, the resistor R2 is connected between the base and the emitter of the triode Q1, the collector of the triode Q1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the base of a triode Q2 and one end of a resistor R4, the emitter of the triode Q2 is respectively connected with the positive electrode of a power supply and the other end of the resistor R4, the collector of the triode Q2 is connected with the positive electrode of the early warning device, and the negative electrode of the early warning device is grounded.

[0015] Beneficial effects: the infrared array sensor is adopted to collect infrared image data of multiple target positions in the photovoltaic substation, and then the temperature of each target position is recognized according to the infrared image data, when the temperature is higher than the set threshold value, the early warning signal can be output, and the effect of preventing fire is better; LoRa communication networking is adopted between the acquisition terminal and the monitoring terminal, the communication line does not need to be additionally laid, the labor cost is saved, and the photovoltaic substation in use can be conveniently upgraded and modified. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1is a principle block diagram of the collection terminal of the photovoltaic substation early warning system of the embodiment of the utility model;

[0017] Fig. 2 is a principle block diagram of the monitoring terminal of the photovoltaic substation early warning system of the embodiment of the utility model;

[0018] Fig. 3 is a principle diagram of the drive circuit of the monitoring terminal. DETAILED DESCRIPTION

[0019] The utility model will be further illustrated in combination with the drawings and specific embodiments, and the embodiment is implemented under the premise of the technical scheme of the utility model, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the range of the utility model.

[0020] As Figs. 1 to 3 Indicated, the utility model embodiment provides a kind of photovoltaic substation early warning system, including multiple collection terminals and a monitoring terminal, multiple collection terminals are connected with monitoring terminal.Just one collection terminal needs to be set in a photovoltaic substation, and monitoring terminal is set in centralized monitoring room.

[0021] The collection terminal of the embodiment of the utility model includes first processing module 11, and first processing module 11 preferably adopts STM32 series single-chip microcomputer.First processing module 11 is connected with multiple infrared array sensors 12, and the model of infrared array sensor 12 is preferably MLX90640, which is connected with first processing module 11 by I2C interface.Infrared array sensor 12 collects the infrared image data of multiple target positions in photovoltaic substation, and sends the collected infrared image data to first processing module 11.First processing module 11 judges whether the temperature of multiple target positions in photovoltaic substation is higher than set threshold according to infrared image data, and then generates temperature judgment result.It should be noted that first processing module 11 judges temperature according to received infrared image data for prior art, and its principle is not repeated here.In addition, the above-mentioned target position includes wiring row and the wiring terminal of contactor and circuit breaker and the like, and these positions are prone to temperature rise due to loosening and the like, and then cause electrical fire, when installing infrared array sensor 12, these positions should be covered as far as possible.First processing module 11 is connected with first communication module 13, and first communication module 13 is used to send infrared image data and temperature judgment result to monitoring terminal.

[0022] The first processing module 11 is further connected with a first storage module 14, a first power module 15 and a man-machine interaction module 16. The first processing module 11 controls the first storage module 14 to locally store the infrared image data received by the first storage module 14 and the temperature judgment result obtained according to the infrared image data, so as to avoid loss of data due to network exception or other factors. The first storage module 14 is preferably an SD card, and is connected with the first processing module 11 through an SDIO interface, supports high-speed data transmission, has fast read-write speed and low delay characteristics. The first power module 15 provides power required for operation of the acquisition terminal. The man-machine interaction module 16 includes a plurality of keys and a liquid crystal display, and the size of the liquid crystal display is preferably 240mmX240mm. The man-machine interaction module 16 can be used for parameter setting, communication configuration and the like, and can also be controlled by the first processing module 11 to display the current temperature judgment result.

[0023] The monitoring terminal of the embodiment of the utility model includes a second communication module 21, the second communication module 21 is same with the system of first communication module 13, preferably adopts LoRa module, LoRa communication can satisfy the demand of coverage area, and the working energy consumption is lower, at the same time, avoid the problem of high cost of line laying caused by wired communication mode such as light or Ethernet. The second communication module 21 is used to receive the infrared image data and the temperature judgment result sent by the first communication module 13. The second communication module 21 is connected with a second processing module 22, and the second processing module 22 is also preferably an STM32 series single-chip microcomputer. The second processing module 22 processes the infrared image data and the temperature judgment result received by the second processing module 22. The second processing module 22 is connected with a display module 23 and an early warning unit 24. The display module 23 is preferably an LED display screen. The second processing module 22 controls the display module 23 to present the infrared image data in the photovoltaic substation, so that relevant personnel can see the infrared image of the target position in the photovoltaic substation. When the temperature of any target position in the photovoltaic substation is higher than the set threshold value, the second processing module 22 controls the early warning unit 24 to send an early warning signal, so as to inform relevant personnel to find out the reason in time and take corresponding measures.

[0024] The second processing module 22 is further connected with a second storage module 25 and a second power module 26 respectively. The second processing module 22 controls the second storage module 25 to remotely store the infrared image data and the temperature judgment result obtained according to the infrared image data. The second storage module 25 is also preferably an SD card, and is connected with the second processing module 22 through an SDIO interface. The second power module 26 provides power required for operation of the monitoring terminal.

[0025] The pre-warning unit comprises a driving circuit and a pre-warn BL1 connected with the driving circuit. The driving circuit comprises a resistor R1, one end of the resistor R1 is connected with the second processing module 22, the other end of the resistor R1 is connected with the base of a triode Q1, the emitter of the triode Q1 is connected with the ground, the resistor R2 is connected between the base and the emitter of the triode Q1, the collector of the triode Q1 is connected with one end of a resistor R3. The other end of the resistor R3 is connected with the base of a triode Q2 and one end of a resistor R4, the emitter of the triode Q2 is connected with the positive pole of a power supply and the other end of the resistor R4 respectively, the collector of the triode Q2 is connected with the positive pole VCC of the pre-warn BL1, the negative pole of the pre-warn BL1 is grounded. A fuse F1 can be connected in front of the pre-warn BL1 for overcurrent protection. When the temperature judgment result is that the temperature of a certain target position exceeds the set threshold, the second processing module 22 outputs a high level signal, that is, the triode Q1 and the triode Q2 are controlled to be turned on in turn, and then the pre-warn BL1 is powered, so that the pre-warn BL1 emits a pre-warning sound, and the relevant personnel are informed to find out the cause in time and take corresponding measures. In addition, the first processing module 11 can be connected with a relay protection circuit, when the temperature judgment result is that the temperature of a certain target position exceeds the set threshold, the input and output air switches in the photovoltaic substation are interlocked and controlled by the relay protection circuit, so that the input and output of the photovoltaic substation are cut off in time, and the fire is avoided.

[0026] The above only describes the preferred embodiments of the present application, and it should be pointed out that other parts not specifically described belong to the prior art or common knowledge for ordinary skilled in the art. Without departing from the principles of the present application, some improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A photovoltaic substation early warning system, characterized in that: The system comprises a plurality of acquisition terminals and a monitoring terminal, wherein the acquisition terminal comprises a first processing module, the first processing module being connected to a plurality of infrared array sensors, the infrared array sensors being used to acquire infrared image data of a plurality of target locations within a photovoltaic substation and sending the acquired infrared image data to the first processing module, the first processing module determining whether the temperature of the plurality of target locations within the photovoltaic substation is higher than a set threshold value based on the received infrared image data, and the first processing module being connected to a first communication module, the first communication module being used to send the infrared image data and the temperature determination result to the monitoring terminal; The monitoring terminal includes a second communication module, which is used to receive the infrared image data and temperature judgment results sent by the first communication module. The second communication module is connected to the second processing module, and the second processing module is connected to the display module and the early warning unit. The second processing module controls the display module to present the infrared image data of multiple target locations in the photovoltaic substation, and controls the early warning unit to issue an early warning signal when the temperature of any target location in the photovoltaic substation is higher than a set threshold.

2. A photovoltaic substation early warning system according to claim 1, characterized in that: The first processing module is further connected to a first storage module, and the second processing module is further connected to a second storage module. The first storage module and the second storage module are both used to store infrared image data and temperature judgment results.

3. A photovoltaic substation early warning system according to claim 1, characterized in that: The first processing module and the second processing module are connected to the first power module and the second power module respectively. The first power module and the second power module are used to provide power to the acquisition terminal and the monitoring terminal respectively.

4. A photovoltaic substation early warning system according to claim 1, characterized in that: The first communication module and the second communication module are both LoRa modules.

5. A photovoltaic substation early warning system according to claim 1, characterized in that: The first processing module and the second processing module are both STM32 series single-chip microcomputers.

6. A photovoltaic substation early warning system according to claim 1, characterized in that: The model of the infrared array sensor is MLX90640.

7. A photovoltaic substation early warning system according to claim 2, characterized in that: The first storage module and the second storage module are both SD cards, and are respectively connected to the first processing module and the second processing module through SDIO interfaces.

8. The photovoltaic substation early warning system according to claim 1, characterized in that: The first processor is also connected to a human-computer interaction module.

9. The photovoltaic substation early warning system according to claim 1, characterized in that: The early warning unit includes a drive circuit and an early warning device connected to the drive circuit. The drive circuit includes a resistor R1 connected to the second processing module at one end, the other end of the resistor R1 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is connected to the ground, a resistor R2 is connected between the base and the emitter of the transistor Q1, the collector of the transistor Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the base of the transistor Q2 and one end of the resistor R4, the emitter of the transistor Q2 is connected to the positive pole of the power supply and the other end of the resistor R4 respectively, the collector of the transistor Q2 is connected to the positive pole of the early warning device, and the negative pole of the early warning device is grounded.

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