Operation control system of cogeneration photovoltaic power generation system

Abstract

The invention relates to the technical field of power system control and automation, and discloses an operation control system of a cogeneration 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 an online instrument, monitoring equipment and a sensor to monitor the working state of the photovoltaic power generation system in real time, the photovoltaic data acquisition module counts data, and the photovoltaic data analysis module calculates the real-time photovoltaic cell heat dissipating capacity Qj, the minimum photovoltaic cell heat dissipating capacity Qjmin, the safe heat dissipating adjustment requirement Wil and the optimized heat dissipating capacity Qz; the photovoltaic data management module adjusts the heat dissipation mode according to the real-time heat dissipation capacity Qj of the photovoltaic cell, the safe heat dissipation adjustment requirement Wil and the optimized heat dissipation capacity Qz, the above operation can ensure that the heat dissipation function and the energy storage function of the photovoltaic cell panel are always kept in the optimal working state, and the dynamic adjustment operation of the calculation mode not only helps to improve the heat dissipation efficiency, but also helps to improve the heat dissipation efficiency. And the waste of photovoltaic thermal energy conversion can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power system control and automation, and in particular to an operation control system of a cogeneration photovoltaic power generation system. Background Art

[0002] In the cogeneration photovoltaic power generation system, since the components are centrally installed in the photovoltaic base station, a large amount of heat will be generated during high-intensity operation. There are many shortcomings in the existing heat dissipation methods and heat energy conversion, such as insufficient heat dissipation, susceptibility to weather influences (such as water vapor introduction in rainy weather), and limited heat dissipation area. These problems not only affect the performance and life of the equipment, but also increase the difficulty and cost of operation and maintenance. In addition, in the process of converting solar energy into electrical energy, part of the energy of photovoltaic cells will be dissipated in the form of heat energy, and this part of heat energy cannot be effectively utilized. In order to improve the overall efficiency of the photovoltaic system, it is necessary to explore new heat recovery and utilization technologies. Therefore, the research and development of efficient heat dissipation technology has become an important topic to improve the performance of photovoltaic power generation systems. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides an operation control system for a cogeneration photovoltaic power generation system, which has the advantages of sufficient heat dissipation and complete thermal energy conversion, and solves the problems of insufficient heat dissipation and incomplete thermal energy conversion in the prior art.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an operation control system of a cogeneration 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, and the photovoltaic monitoring module is connected to the photovoltaic data acquisition module through the network;

[0008] The photovoltaic data acquisition module includes a photovoltaic cell assembly unit, an operating environment data unit and a photovoltaic operation data unit. The photovoltaic cell assembly unit collects photovoltaic cell data through sensor monitoring, the operating environment data unit collects operating environment data through an online temperature and humidity instrument, and the photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerabilities and port scanning. After the photovoltaic cell assembly unit, the operating environment data unit and the photovoltaic operation data unit perform statistics on the internal data, they are connected to the photovoltaic data analysis module through the 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 according to the photovoltaic cell data. min The environmental factor heat dissipation adjustment unit is based on the minimum photovoltaic cell heat dissipation Qj min The safe heat dissipation adjustment requirement Wil is calculated with the operating environment data, the heat conversion unit calculates the optimized heat dissipation Qz according to the photovoltaic operation data, and 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 mode according to the real-time photovoltaic cell heat dissipation Qj, the safety heat dissipation adjustment requirement Wil and the optimized heat dissipation Qz.

[0011] Preferably, the photovoltaic cell assembly unit performs data statistics on the panel temperature and coolant temperature measured within a period of time according to the photovoltaic cell data characteristics, and the panel temperature statistics measured within the period of time are T1, T2, T3, ...T n The coolant temperature statistics measured during the period are S1, S2, S3, ... S n .

[0012] Preferably, the operating environment data unit performs data statistics on the real-time temperature and humidity of the operating environment according to the operating environment data characteristics, and the real-time temperature and humidity of the operating environment are respectively counted as T r , W r .

[0013] Preferably, the photovoltaic operation data unit performs data statistics on the photovoltaic total voltage, photovoltaic 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 according to the photovoltaic operation data characteristics, and the photovoltaic total voltage, photovoltaic 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 counted 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 according to the photovoltaic cell data. min , and its calculation formula is:

[0015]

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

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

[0018] Preferably, the environmental factor heat dissipation adjustment unit is based on the minimum photovoltaic cell heat dissipation Qj min Calculate the safe heat dissipation adjustment requirement Wil with the operating environment data. The calculation formula is:

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

[0020] In the formula, Wil represents the safe heat dissipation adjustment requirement, Qj min Indicates the minimum heat dissipation of photovoltaic cells, T r , W r They represent 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 increases the application of active cooling technology according to the safety heat dissipation adjustment requirement Wil.

[0022] Preferably, the heat conversion unit calculates the optimized heat dissipation Qz according to the photovoltaic operation data, and the calculation formula is:

[0023]

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

[0025] Preferably, the photovoltaic data management module introduces phase change energy storage technology according to the optimized heat dissipation Qz.

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

[0027] 1. The present invention calculates the real-time heat dissipation Qj of photovoltaic cells. The calculation formula comprehensively considers the difference between the average temperature of the panel and the average temperature of the coolant, as well as the thermal resistance of the system, to calculate the real-time heat dissipation and minimum heat dissipation required by the photovoltaic power generation system, which helps to avoid excessive or insufficient heat dissipation of the photovoltaic power generation system, thereby improving the heat dissipation efficiency. According to the calculated real-time heat dissipation and minimum heat dissipation, the system can dynamically adjust the operating state of the heat dissipation device (fan speed, coolant flow) to ensure that the panel always remains within the optimal operating temperature range. By setting the minimum heat dissipation, the system can take measures in advance when the panel temperature approaches the minimum safe temperature to prevent the panel from being damaged due to too low a temperature. The above effective heat dissipation management method can reduce the thermal stress of the panel, extend its service life, and reduce the performance degradation caused by overheating.

[0028] 2. The present invention calculates the optimized heat dissipation Qz, and the system can dynamically adjust the operating state of the heat dissipation equipment or introduce phase change energy storage technology to ensure that the heat dissipation function and energy storage function of the photovoltaic panel are always maintained in the best working state. This dynamic adjustment helps to improve the 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 panel and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1 , an operation control system of a cogeneration 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;

[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 the network;

[0033] The photovoltaic data acquisition module includes a photovoltaic cell assembly unit, an operating environment data unit and a photovoltaic operation data unit. The photovoltaic cell assembly unit collects photovoltaic cell data through sensor monitoring. The operating environment data unit collects operating environment data through an online temperature and humidity instrument. The photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerabilities and port scanning. After the photovoltaic cell assembly unit, the operating environment data unit and the photovoltaic operation data unit collect internal data statistics, 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 is based on the minimum photovoltaic cell heat dissipation Qj min The safe heat dissipation adjustment requirement Wil is calculated with the operating environment data. The heat conversion unit calculates the optimized heat dissipation Qz according to the 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 through the network;

[0035] The photovoltaic data management module adjusts the heat dissipation mode according to the real-time photovoltaic cell heat dissipation Qj, the safety heat dissipation adjustment requirement Wil and the optimized heat dissipation Qz.

[0036] The photovoltaic cell module unit performs data statistics on the panel temperature and coolant temperature measured within a period of time according to the photovoltaic cell data characteristics. The panel temperature statistics measured within a period of time are T1, T2, T3, ...T n The coolant temperature statistics measured over a period of time are S1, S2, S3, ... S n .

[0037] The operating environment data unit performs data statistics on the real-time temperature and humidity of the operating environment according to the operating environment data characteristics. The real-time temperature and humidity of the operating environment are respectively counted as T r , W r .

[0038] The photovoltaic operation data unit performs data statistics on the total photovoltaic voltage, the total photovoltaic current, the actual output voltage, the actual output current, the theoretical output voltage, the theoretical output current, the heat transfer rate, the heat dissipation area and the cooling water temperature difference according to the photovoltaic operation data characteristics. The total photovoltaic voltage, the total photovoltaic current, the actual output voltage, the actual output current, the theoretical output voltage, the theoretical output current, the heat transfer rate, the heat dissipation area and the cooling water temperature difference are respectively counted 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 , and its calculation formula is:

[0040]

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

[0042] The advantages are: by calculating the real-time heat dissipation Qj of the photovoltaic cells, the calculation formula comprehensively considers 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 heat dissipation and minimum heat dissipation required by the photovoltaic power generation system, which helps to avoid excessive or insufficient heat dissipation of the photovoltaic power generation system, thereby improving the heat dissipation efficiency. According to the calculated real-time heat dissipation and minimum heat dissipation, the system can dynamically adjust the operating status of the heat dissipation equipment (fan speed, coolant flow) to ensure that the solar panel always remains within the optimal operating temperature range. By setting the minimum heat dissipation, the system can take measures in advance when the temperature of the solar panel approaches the minimum safe temperature to prevent the solar panel from being damaged due to excessively low temperature. The above effective heat dissipation management methods can reduce the thermal stress of the solar panel, extend its service life, and reduce performance degradation caused by overheating.

[0043] The photovoltaic data management module adjusts the number of self-heating photovoltaic modules according to the real-time photovoltaic cell heat dissipation Qj.

[0044] Environmental factor heat dissipation adjustment unit according to the minimum photovoltaic cell heat dissipation Qj min Calculate the safe heat dissipation adjustment requirement Wil with the operating environment data. The calculation formula is:

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

[0046] In the formula, Wil represents the safe heat dissipation adjustment requirement, Qj min Indicates the minimum heat dissipation of photovoltaic cells, T r , W r They represent 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 demand Wil, the formula includes the real-time temperature and humidity of the operating environment, which helps the photovoltaic heat dissipation system to dynamically adjust the 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 increase the heat dissipation accordingly to ensure that the photovoltaic cells will not overheat and cause damage. In addition, the 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 safe heat dissipation adjustment demand Wil can be used to adjust the system parameters to meet the heat dissipation requirements.

[0048] The photovoltaic data management module adjusts the requirements of safe heat dissipation and adds active cooling technology.

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

[0050]

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

[0052] The advantage is that by calculating the optimized 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 maintained in the best working state. This dynamic adjustment helps to improve the 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 introduces phase change energy storage technology according to the optimized heat dissipation Qz.

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

Claims

1. An operation control system for a cogeneration photovoltaic power generation system, characterized in that: Including photovoltaic monitoring module, photovoltaic data acquisition module, photovoltaic data analysis module and 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, and the photovoltaic monitoring module is connected to the photovoltaic data acquisition module through the network; The photovoltaic data acquisition module includes a photovoltaic cell assembly unit, an operating environment data unit and a photovoltaic operation data unit. The photovoltaic cell assembly unit collects photovoltaic cell data through sensor monitoring, the operating environment data unit collects operating environment data through an online temperature and humidity instrument, and the photovoltaic operation data unit collects photovoltaic operation data through online monitoring instruments, vulnerabilities and port scanning. After the photovoltaic cell assembly unit, the operating environment data unit and the photovoltaic operation data unit perform statistics on the internal data, they are connected to the photovoltaic data analysis module through the 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 photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj according to the photovoltaic cell data. min The environmental factor heat dissipation adjustment unit is based on the minimum photovoltaic cell heat dissipation Qj min The safe heat dissipation adjustment requirement Wil is calculated with the operating environment data, the heat conversion unit calculates the optimized heat dissipation Qz according to the photovoltaic operation data, and 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; The photovoltaic data management module adjusts the heat dissipation mode according to the real-time photovoltaic cell heat dissipation Qj, the safety heat dissipation adjustment requirement Wil and the optimized heat dissipation Qz.

2. The operation control system of a cogeneration photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic cell assembly unit performs data statistics on the cell panel temperature and the coolant temperature measured within a period of time according to the photovoltaic cell data characteristics, and the cell panel temperature statistics measured within the period of time are T1, T2, T3, ...T n The coolant temperature statistics measured during the period are S1, S2, S3, ... S n .

3. The operation control system of a cogeneration photovoltaic power generation system according to claim 1, characterized in that: The operating environment data unit performs data statistics on the real-time temperature and humidity of the operating environment according to the operating environment data characteristics, and the real-time temperature and humidity of the operating environment are respectively counted as T r , W r .

4. The operation control system of a cogeneration photovoltaic power generation system according to claim 1, characterized in that: The photovoltaic operation data unit performs data statistics on the photovoltaic total voltage, photovoltaic 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 according to the photovoltaic operation data characteristics, and the photovoltaic total voltage, photovoltaic 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 counted as V z , A z 、V x , A x 、V g , A g , L, D, Δt.

5. The operation control system of a cogeneration photovoltaic power generation system according to claim 2, characterized in that: The operating temperature heat dissipation unit calculates the real-time photovoltaic cell heat dissipation Qj and the minimum photovoltaic cell heat dissipation Qj according to the photovoltaic cell data. min , and its calculation formula is: In the formula, Qj represents the real-time heat dissipation of photovoltaic cells, T1, T2, T3, ...T n Indicates the temperature of the solar panel measured over a period of time, S1, S2, S3, ...S n Indicates the coolant temperature measured over a period of time, represents the difference between the average temperature of the solar panel and the average temperature of the coolant, n represents the number of solar panels counted, K represents the thermal resistance of the photovoltaic power generation system, Qj min represents the minimum heat dissipation of photovoltaic cells, T min Indicates the lowest temperature of the solar panel, S min Indicates the minimum coolant temperature.

6. The operation control system of a cogeneration photovoltaic power generation system according to claim 5, characterized in that: The photovoltaic data management module adjusts the number of groups of self-heating photovoltaic components according to the real-time photovoltaic cell heat dissipation Qj.

7. The operation control system of a cogeneration photovoltaic power generation system according to claim 5, characterized in that: The environmental factor heat dissipation adjustment unit is based on the minimum photovoltaic cell heat dissipation Qj min Calculate the safe heat dissipation adjustment requirement Wil with the operating environment data. The calculation formula is: Wil=Qj min *(1+b*T r +c*W r ) In the formula, Wil represents the safe heat dissipation adjustment requirement, Qj min represents the minimum heat dissipation of photovoltaic cells, T r , W r They represent 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.

8. The operation control system of a cogeneration photovoltaic power generation system according to claim 7, characterized in that: The photovoltaic data management module increases the application of active cooling technology according to the safety heat dissipation adjustment requirements.

9. The operation control system of a cogeneration photovoltaic power generation system according to claim 4, characterized in that: The heat conversion unit calculates the optimized heat dissipation Qz according to the photovoltaic operation data, and the calculation formula is: In the formula, Qz represents the heat dissipation after optimization, V z , A z 、V x , A x 、V g , A g , L, D, and Δt represent the total voltage of photovoltaic, the total current of photovoltaic, the actual output voltage, the actual output current, the theoretical output voltage, the theoretical output current, the heat transfer rate, the heat dissipation area, and the cooling water temperature difference, respectively. z *A z Represents the total power of the photovoltaic system, V x *A x Indicates the actual output power, V g *A g Indicates the theoretical maximum output power, Indicates the current heat dissipation efficiency. Indicates the heat dissipation coefficient.

10. The operation control system of a cogeneration photovoltaic power generation system according to claim 9, characterized in that: The photovoltaic data management module introduces phase change energy storage technology according to the optimized heat dissipation Qz.

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