A combined heat and power photovoltaic power generation system operation control system

Abstract

The application relates to the technical field of power system control and automation, and discloses an operation control system of a combined heat and power photovoltaic power generation system, which comprises a photovoltaic monitoring module, a photovoltaic data acquisition module, a photovoltaic data analysis module and a photovoltaic data management module; the photovoltaic monitoring module uses online instruments, monitoring equipment and sensors to monitor the working state of the photovoltaic power generation system in real time; the photovoltaic data acquisition module counts data; the photovoltaic data analysis module calculates real-time photovoltaic cell heat dissipation Qj, minimum photovoltaic cell heat dissipation Qj min , safe heat dissipation adjustment demand Wil and optimized heat dissipation Qz; and the photovoltaic data management module adjusts the heat dissipation mode according to the real-time photovoltaic cell heat dissipation Qj, the safe heat dissipation adjustment demand Wil and the optimized heat dissipation Qz; the above operation can ensure that the heat dissipation function and the energy storage function of the photovoltaic panel always maintain the best working state; the dynamic adjustment operation of the calculation mode not only helps to improve the heat dissipation efficiency, but also reduces the waste of photovoltaic thermal energy conversion.

Description

Technical Field

[0001] This invention relates to the field of power system control and automation technology, specifically to an operation control system for a combined heat and power photovoltaic power generation system. Background Technology

[0002] In combined heat and power (CHP) photovoltaic (PV) power generation systems, a significant amount of heat is generated during high-intensity operation due to the concentrated installation of components within the PV base station. Existing heat dissipation methods and heat conversion processes have several shortcomings, such as insufficient heat dissipation, susceptibility to weather conditions (e.g., moisture ingress during cloudy or rainy weather), and limited heat dissipation area. These problems not only affect equipment performance and lifespan but also increase the difficulty and cost of operation and maintenance. Furthermore, during the conversion of solar energy into electrical energy, some energy is lost as heat, which is not effectively utilized. To improve the overall efficiency of PV systems, new heat recovery and utilization technologies need to be explored. Therefore, researching and developing efficient heat dissipation technologies has become a crucial issue for improving the performance of PV power generation systems. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides an operation and control system for a combined heat and power photovoltaic power generation system, which has the advantages of sufficient heat dissipation and complete heat energy conversion, thus solving the problems of insufficient heat dissipation and incomplete heat energy conversion in existing technologies.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: an operation control system for a combined heat and power photovoltaic power generation system, comprising a photovoltaic monitoring module, a photovoltaic data acquisition module, a photovoltaic data analysis module, and a photovoltaic data management module;

[0007] The photovoltaic monitoring module uses online instruments, monitoring equipment and sensors to monitor the working status of the photovoltaic power generation system in real time. The photovoltaic monitoring module is connected to the photovoltaic data acquisition module through a network.

[0008] The photovoltaic data acquisition module includes a photovoltaic cell module unit, an operating environment data unit, and a photovoltaic operation data unit. The photovoltaic cell module unit collects photovoltaic cell data through sensors. The operating environment data unit collects operating environment data through online temperature and humidity instruments. The photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerability and port scanning. After the photovoltaic cell module unit, operating environment data unit, and photovoltaic operation data unit statistically analyze the internal data, they are connected to the photovoltaic data analysis module through a network.

[0009] The photovoltaic data analysis module includes an operating temperature heat dissipation unit, an environmental factor heat dissipation adjustment unit, and a heat conversion unit. The operating temperature heat dissipation unit calculates the real-time photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj based on the photovoltaic cell data. min The environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum photovoltaic cell heat dissipation Qj. min The heat conversion unit calculates the optimized heat dissipation Qz based on the photovoltaic operating data and calculates the safe heat dissipation adjustment requirements based on the operating environment data. The operating temperature heat dissipation unit, the environmental factor heat dissipation adjustment unit, and the heat conversion unit are connected to the photovoltaic data management module through the network.

[0010] The photovoltaic data management module adjusts the heat dissipation method based on the real-time heat dissipation of the photovoltaic cell Qj, the safe heat dissipation adjustment requirement Wil, and the optimized heat dissipation Qz.

[0011] Preferably, the photovoltaic module unit performs data statistics on the measured panel temperature and coolant temperature over a period of time based on the characteristics of photovoltaic cell data. The measured panel temperature over the period of time is statistically analyzed as T1, T2, T3, ... T n The coolant temperatures measured over the aforementioned period are statistically denoted as S1, S2, S3, ... S n .

[0012] Preferably, the operating environment data unit performs statistical analysis on the real-time temperature and humidity of the operating environment based on the characteristics of the operating environment data, wherein the real-time temperature and humidity of the operating environment are respectively statistically analyzed as T. r W r .

[0013] Preferably, the photovoltaic operation data unit performs statistical analysis on the total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference based on the characteristics of photovoltaic operation data. The total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference are respectively statistically represented as V. z A z V x A x V g A g L, D, Δt.

[0014] Preferably, the operating temperature heat dissipation unit calculates the real-time photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj based on the photovoltaic cell data. min The calculation formula is as follows:

[0015]

[0016] In the formula, Qj represents the real-time heat dissipation of the photovoltaic cell, and T1, T2, T3, ... T n The values ​​S1, S2, S3, ... S represent the measured temperatures of the solar panels over a period of time. n This indicates the coolant temperature measured over a period of time. This represents the difference between the average temperature of the solar panel and the average temperature of the coolant, where n represents the number of solar panels counted, K represents the thermal resistance of the photovoltaic power generation system, and Qj represents the average temperature of the solar panel. min T represents the minimum heat dissipation of a photovoltaic cell. min Indicates the lowest temperature of the solar panel, S min This indicates the lowest temperature of the coolant.

[0017] Preferably, the photovoltaic data management module adjusts the number of self-heating photovoltaic modules according to the real-time heat dissipation Qj of the photovoltaic cells.

[0018] Preferably, the environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum photovoltaic cell heat dissipation Qj. min The calculation formula for the required heat dissipation and safety adjustments based on the operating environment data is as follows:

[0019] Wil = Qj min *(1+b*T r +c*W r )

[0020] In the formula, Wil represents the required safe heat dissipation adjustment, and Qj min T represents the minimum heat dissipation of a photovoltaic cell. r W r represents the real-time temperature and humidity of the operating environment, respectively, and b and c represent the weights corresponding to the real-time temperature and humidity of the operating environment, respectively.

[0021] Preferably, the photovoltaic data management module will add active cooling technology based on the safety heat dissipation adjustment requirements.

[0022] Preferably, the heat conversion unit calculates the optimized heat dissipation Qz based on photovoltaic operation data, and the calculation formula is as follows:

[0023]

[0024] In the formula, Qz represents the optimized heat dissipation, and V z A z V x A x V g A gL, D, and Δt represent the total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference, respectively. z *A z V represents the total power of the photovoltaic system. x *A x V represents the actual output power. g *A g This represents the theoretical maximum output power. Indicates the current heat dissipation efficiency. This represents the heat dissipation coefficient.

[0025] Preferably, the photovoltaic data management module incorporates phase change energy storage technology based on the optimized heat dissipation Qz.

[0026] Compared with the prior art, the present invention provides an operation control system for a combined heat and power photovoltaic power generation system, which has the following beneficial effects:

[0027] 1. This invention calculates the real-time heat dissipation Qj of photovoltaic cells. This calculation formula combines the difference between the average temperature of the solar panel and the average temperature of the coolant, as well as the thermal resistance of the system, to calculate the real-time and minimum heat dissipation required by the photovoltaic power generation system. This helps to avoid overheating or underheating of the photovoltaic power generation system, thereby improving heat dissipation efficiency. Based on the calculated real-time and minimum heat dissipation, the system can dynamically adjust the operating status of the heat dissipation equipment (fan speed, coolant flow rate) to ensure that the solar panel is always kept within the optimal operating temperature range. By setting the minimum heat dissipation, the system can take measures in advance when the solar panel temperature approaches the minimum safe temperature to prevent the solar panel from being damaged due to excessively low temperature. Through the above effective heat dissipation management methods, the thermal stress of the solar panel can be reduced, its service life can be extended, and the performance degradation caused by overheating can be reduced.

[0028] 2. By calculating and optimizing the heat dissipation Qz, the system can dynamically adjust the operating status of the heat dissipation equipment or introduce phase change energy storage technology to ensure that the heat dissipation and energy storage functions of the photovoltaic panels are always kept in the best working state. This dynamic adjustment helps to improve heat dissipation efficiency. While reducing the waste of photovoltaic thermal energy conversion, the optimized heat dissipation also helps to reduce the thermal stress of the panels and extend their service life. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0030] 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.

[0031] Please see Figure 1 An operation control system for a combined heat and power photovoltaic power generation system includes a photovoltaic monitoring module, a photovoltaic data acquisition module, a photovoltaic data analysis module, and a photovoltaic data management module;

[0032] The photovoltaic monitoring module uses online instruments, monitoring equipment and sensors to monitor the working status of the photovoltaic power generation system in real time. The photovoltaic monitoring module is connected to the photovoltaic data acquisition module through a network.

[0033] The photovoltaic data acquisition module includes a photovoltaic cell module unit, an operating environment data unit, and a photovoltaic operation data unit. The photovoltaic cell module unit collects photovoltaic cell data through sensors, the operating environment data unit collects operating environment data through online temperature and humidity instruments, and the photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerability and port scanning. After the photovoltaic cell module unit, operating environment data unit, and photovoltaic operation data unit compile the internal data, they are connected to the photovoltaic data analysis module through the network.

[0034] The photovoltaic data analysis module includes an operating temperature heat dissipation unit, an environmental factor heat dissipation adjustment unit, and a heat conversion unit. The operating temperature heat dissipation unit calculates the real-time photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj based on the photovoltaic cell data. min The environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum photovoltaic cell heat dissipation Qj. min The operating environment data is used to calculate the safe heat dissipation adjustment requirements (Wil). The heat conversion unit calculates the optimized heat dissipation Qz based on the photovoltaic operating data. The operating temperature heat dissipation unit, the environmental factor heat dissipation adjustment unit, and the heat conversion unit are connected to the photovoltaic data management module via the network.

[0035] The photovoltaic data management module adjusts the heat dissipation method based on the real-time heat dissipation of the photovoltaic cells Qj, the safe heat dissipation adjustment requirement Wil, and the optimized heat dissipation Qz.

[0036] The photovoltaic module unit statistically analyzes the measured panel temperature and coolant temperature over a period of time based on the characteristics of the photovoltaic cell data. The measured panel temperature over a period of time is statistically recorded as T1, T2, T3, ... T n The coolant temperatures measured over a period of time are statistically summarized as S1, S2, S3, ... S n .

[0037] The operating environment data unit performs statistical analysis on the real-time temperature and humidity of the operating environment based on its characteristics. The real-time temperature and humidity of the operating environment are statistically analyzed as T. r W r .

[0038] The photovoltaic (PV) operation data unit performs statistical analysis on the PV's total voltage, total current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference based on the characteristics of PV operation data. The total voltage, total current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference are respectively statistically represented as V. z A z V x A x V g A g L, D, Δt.

[0039] The operating temperature heat dissipation unit calculates the real-time photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj based on the photovoltaic cell data. min The calculation formula is as follows:

[0040]

[0041] In the formula, Qj represents the real-time heat dissipation of the photovoltaic cell, and T1, T2, T3, ... T n The values ​​S1, S2, S3, ... S represent the measured temperatures of the solar panels over a period of time. n This indicates the coolant temperature measured over a period of time. This represents the difference between the average temperature of the solar panel and the average temperature of the coolant, where n represents the number of solar panels counted, K represents the thermal resistance of the photovoltaic power generation system, and Qj represents the average temperature of the solar panel. min T represents the minimum heat dissipation of a photovoltaic cell. min Indicates the lowest temperature of the solar panel, S min This indicates the lowest temperature of the coolant.

[0042] The advantages are: by calculating the real-time heat dissipation Qj of the photovoltaic cells, the calculation formula combines the difference between the average temperature of the solar panel and the average temperature of the coolant, as well as the thermal resistance of the system, to calculate the real-time and minimum heat dissipation required by the photovoltaic power generation system. This helps to avoid overheating or underheating of the photovoltaic power generation system, thereby improving heat dissipation efficiency. Based on the calculated real-time and minimum heat dissipation, the system can dynamically adjust the operating status of the heat dissipation equipment (fan speed, coolant flow rate) to ensure that the solar panels are always kept within the optimal operating temperature range. By setting the minimum heat dissipation, the system can take measures in advance when the solar panel temperature approaches the minimum safe temperature to prevent the solar panels from being damaged due to excessively low temperatures. Through the above effective heat dissipation management methods, the thermal stress of the solar panels can be reduced, their service life can be extended, and the performance degradation caused by overheating can be reduced.

[0043] The photovoltaic data management module adjusts the number of self-heating photovoltaic modules based on the real-time heat dissipation Qj of the photovoltaic cells.

[0044] The environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum photovoltaic cell heat dissipation Qj. min The calculation formula for the required heat dissipation and safety adjustments based on the operating environment data is as follows:

[0045] Wil = Qj min *(1+b*T r +c*W r )

[0046] In the formula, Wil represents the required safe heat dissipation adjustment, and Qj min T represents the minimum heat dissipation of a photovoltaic cell. r W r represents the real-time temperature and humidity of the operating environment, respectively, and b and c represent the weights corresponding to the real-time temperature and humidity of the operating environment, respectively.

[0047] The advantages are: by calculating the safe heat dissipation adjustment requirement Wil, the formula includes the real-time temperature and humidity of the operating environment, which helps the photovoltaic heat dissipation system to dynamically adjust its heat dissipation strategy according to changes in the current environmental conditions. When in a high-temperature and high-humidity environment, the heat dissipation demand of photovoltaic power generation will increase, and the system will correspondingly increase the heat dissipation to ensure that the photovoltaic cells will not overheat and be damaged. Moreover, this calculation formula can be applied to different environmental conditions, whether it is a high-temperature and high-humidity environment or a low-temperature and low-humidity environment, the system parameters can be adjusted by using the safe heat dissipation adjustment requirement Wil to meet the heat dissipation requirements.

[0048] Based on the need for safe heat dissipation, Wil has added active cooling technology to the photovoltaic data management module.

[0049] The heat conversion unit calculates the optimized heat dissipation Qz based on photovoltaic operation data, and the calculation formula is as follows:

[0050]

[0051] In the formula, Qz represents the optimized heat dissipation, and V z A z V x A x V g A g L, D, and Δt represent the total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference, respectively. z *A z V represents the total power of the photovoltaic system. x *A x V represents the actual output power. g *A g This represents the theoretical maximum output power. Indicates the current heat dissipation efficiency. This represents the heat dissipation coefficient.

[0052] The advantages are: by calculating and optimizing the heat dissipation Qz, the system can dynamically adjust the operating status of the heat dissipation equipment or introduce phase change energy storage technology to ensure that the heat dissipation and energy storage functions of the photovoltaic panels are always kept in the best working state. This dynamic adjustment helps to improve heat dissipation efficiency. While reducing the waste of photovoltaic thermal energy conversion, the optimized heat dissipation also helps to reduce the thermal stress of the panels and extend their service life.

[0053] The photovoltaic data management module incorporates phase change energy storage technology based on the optimized heat dissipation Qz.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An operation control system for a combined heat and power photovoltaic power generation system, characterized in that, It includes a photovoltaic monitoring module, a photovoltaic data acquisition module, a photovoltaic data analysis module, and a photovoltaic data management module; The photovoltaic monitoring module uses online instruments, monitoring equipment and sensors to monitor the working status of the photovoltaic power generation system in real time. The photovoltaic monitoring module is connected to the photovoltaic data acquisition module through a network. The photovoltaic data acquisition module includes a photovoltaic cell module unit, an operating environment data unit, and a photovoltaic operation data unit. The photovoltaic cell module unit collects photovoltaic cell data through sensors. The operating environment data unit collects operating environment data through online temperature and humidity instruments. The photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerability and port scanning. After the photovoltaic cell module unit, operating environment data unit, and photovoltaic operation data unit statistically analyze the internal data, they are connected to the photovoltaic data analysis module through a network. The photovoltaic data analysis module includes an operating temperature heat dissipation unit, an environmental factor heat dissipation adjustment unit, and a heat conversion unit. The operating temperature heat dissipation unit calculates the real-time heat dissipation of the photovoltaic cells based on the photovoltaic cell data. and minimum heat dissipation of photovoltaic cells The environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum heat dissipation of the photovoltaic cell. Adjustments to the operating environment, data computing, safety, and heat dissipation requirements The heat conversion unit calculates and optimizes the heat dissipation based on photovoltaic operation data. The operating temperature heat dissipation unit, the environmental factor heat dissipation adjustment unit, and the heat conversion unit are connected to the photovoltaic data management module via a network; The photovoltaic data management module calculates the real-time heat dissipation of the photovoltaic cells. Safety and heat dissipation adjustment requirements and optimized heat dissipation Adjust the heat dissipation method; The photovoltaic cell module unit performs data statistics on the measured cell panel temperature and coolant temperature over a period of time based on the characteristics of the photovoltaic cell data. The statistical data on the measured cell panel temperature over a period of time is as follows: , , ... The coolant temperature measured over the aforementioned period of time is statistically analyzed as follows: , , ... ; The photovoltaic operation data unit performs statistical analysis on the total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference based on the characteristics of photovoltaic operation data. The total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference are statistically analyzed as follows: , , , , , , , , t; The operating temperature heat dissipation unit calculates the real-time heat dissipation of the photovoltaic cells based on the photovoltaic cell data. and minimum heat dissipation of photovoltaic cells The calculation formula is as follows: In the formula, This indicates the real-time heat dissipation of the photovoltaic cells. , , ... This indicates the temperature of the solar panel measured over a period of time. , , ... This indicates the coolant temperature measured over a period of time. This represents the difference between the average temperature of the solar panel and the average temperature of the coolant. This indicates the number of solar panels counted. Indicates the thermal resistance of a photovoltaic power generation system. This represents the minimum heat dissipation of a photovoltaic cell. Indicates the lowest temperature of the solar panel. Indicates the lowest temperature of the coolant; The environmental factor heat dissipation adjustment unit adjusts the heat dissipation based on the minimum heat dissipation of the photovoltaic cell. Adjustments to the operating environment, data computing, safety, and heat dissipation requirements The calculation formula is as follows: In the formula, This indicates the need for safety and heat dissipation adjustments. This represents the minimum heat dissipation of a photovoltaic cell. , These represent the real-time temperature and humidity of the operating environment, respectively. , These represent the weights corresponding to the real-time temperature and humidity of the operating environment, respectively. The heat conversion unit calculates and optimizes the heat dissipation based on photovoltaic operation data. The calculation formula is as follows: In the formula, This indicates the optimized heat dissipation. , , , , , , , , t represents the total photovoltaic voltage, total photovoltaic current, actual output voltage, actual output current, theoretical output voltage, theoretical output current, heat transfer rate, heat dissipation area, and cooling water temperature difference, respectively. This represents the total power of the photovoltaic system. Indicates the actual output power. This represents the theoretical maximum output power. Indicates the current heat dissipation efficiency. This represents the heat dissipation coefficient.

2. The operation control system of a combined heat and power photovoltaic power generation system according to claim 1, characterized in that: The operating environment data unit performs statistical analysis on the real-time temperature and humidity of the operating environment based on the characteristics of the operating environment data. The real-time temperature and humidity of the operating environment are statistically analyzed as follows: , .

3. The operation control system of a combined heat and power photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic data management module calculates the real-time heat dissipation of the photovoltaic cells. Adjust the number of self-heating photovoltaic modules.

4. The operation control system of a combined heat and power photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic data management module adjusts according to the requirements for safe heat dissipation. Increase the application of active cooling technology.

5. The operation control system of a combined heat and power photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic data management module is based on the optimized heat dissipation. Phase change energy storage technology is introduced.

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