Method for enhancing photovoltaic efficiency of photovoltaic module
Through optical fiber sensor detection and distributed transmission component adjustment, the efficiency problem of photovoltaic modules due to light angle is solved, and the efficient power conversion of photovoltaic modules and the stability of grid voltage are achieved, reducing power loss.
Patent Information
- Application Number
- CN202411555677.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-01-10
AI Technical Summary
During installation, due to the problem of light exposure angle, a large amount of light cannot enter, affecting the efficiency of power generation, and causing the electrolyte inside the battery to decompose when there is no electricity for a long time, increasing the loss of electricity.
The optical fiber sensor detects the ambient light source in real time, calculates and adjusts the inclination angle of the photovoltaic receiver, and uses distributed transmission components to store and adjust the output speed of the electric energy to ensure continuous transmission of electricity and maintain stable grid voltage.
It improves the photovoltaic efficiency of photovoltaic modules, reduces power loss, maintains the stable output of grid current, and dynamically balances the internal chemical reaction of the battery.
Smart Images
Figure CN119298204A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of photovoltaic power generation, and in particular to a method for enhancing the photovoltaic efficiency of a photovoltaic module. Background Art
[0002] Solar power grid is also called "photovoltaic grid" or "photovoltaic module". It is a semiconductor sheet that converts light energy into electrical energy. Photovoltaic modules are composed of grid sheets, photovoltaic glass, EVA film and photovoltaic backplane. Generally, when photovoltaic modules are installed on the facade, due to the problem of light exposure angle, a large amount of light cannot penetrate into the interior of the photovoltaic module, which affects the light exposure time of the photovoltaic module, thus affecting the power generation efficiency. Existing photovoltaic modules usually receive light from the external environment and convert the light into electrical energy and transmit it to the power grid. When the light source in the environment disappears, the input of electrical energy into the power grid will stop. When there is no electrical energy input into the power grid, the electrolyte in the power grid is an important component participating in the chemical reaction of the power grid. When there is no electrical energy input into the power grid for a long time, the electrolyte will decompose, produce gas and other chemical reactions, thereby increasing the loss of electrical energy inside the battery. Summary of the invention
[0003] The object of the present invention is to provide a method for enhancing the photovoltaic efficiency of a photovoltaic module to solve the problems raised in the above background technology.
[0004] To achieve the above object, the present invention provides a method for enhancing the photovoltaic efficiency of a photovoltaic module, comprising the following method steps: S1. When the photovoltaic receiving end needs to be adjusted, the ambient light source is first sensed through the optical fiber sensor, and then the maximum value of the light source is compared; S2. After comparing the maximum value of the light source, calculate the required tilt angle of the photovoltaic receiving end, and then send the angle to the adjustment system to adjust the photovoltaic receiving end; S3. When the photovoltaic receiving end receives the light source, it can convert the light source into electric energy. At this time, the electric energy will be transmitted to the power grid. When the power grid receives the electric energy, it needs to calculate the transmission speed through the distributed transmission element, and then transmit the electric energy to the power grid. When the distributed transmission element outputs the electric energy, it can store part of the electric energy itself. After the storage is completed, the electric energy received by the photovoltaic receiving end is continuously transmitted to the power grid. At this time, the speed of the transmitted electric energy is the same as the speed of the distributed transmission element receiving the electric energy; S4. When there is no light source at the location detected by the optical fiber sensor, the distributed transmission element automatically adjusts the speed of outputting electric energy to the power grid. At this time, the speed of outputting electric energy is determined according to the prediction method to determine the next time to receive electric energy.
[0005] Preferably, the photovoltaic receiving end adjusts the orientation of the receiving end tilt angle through the optical fiber sensor as follows: First, the change of ambient light source is sensed by the change of light intensity of the optical fiber sensor. The optical fiber sensor usually adopts the structure of optical fiber. One end of the optical fiber receives the light from the light source. The light undergoes multiple reflections and refractions inside the optical fiber and finally reaches the other end of the optical fiber. The light intensity information of the ambient light source is obtained by measuring the light intensity at the other end of the optical fiber. After detecting the light source in the environment, the maximum intensity of the light source is analyzed by direct comparison method.
[0006] Preferably, after calculating the angle between the maximum intensity and the photovoltaic receiving end, the angle between the maximum intensity light source and the photovoltaic receiving end is calculated, and finally the angle to be adjusted is output to the adjustment system through wireless transmission method to adjust the position of the photovoltaic receiving end.
[0007] The method to calculate the angle between the maximum intensity and the photovoltaic receiving end is as follows: Right triangle method: Since the distance between the maximum intensity of the light source and the photovoltaic receiving end is known, the observation method measures the straight-line distance between the two to form a right triangle. The incident angle can be calculated by the tangent function: θ is the angle, It is a tangent function. The vertical distance is the distance from the photovoltaic receiving end to the light source in the vertical direction, and the horizontal distance is the distance from the photovoltaic receiving end to the light source in the horizontal direction.
[0008] The observation method measures the straight-line distance between the maximum intensity of the light source and the photovoltaic receiving end, which is the square relationship of the attenuation of the light intensity emitted by the light source as the distance increases. The attenuation law can be expressed as: is the light intensity, is the total power emitted by the light source, is the straight-line distance between the light source and the photovoltaic receiving end; Wireless transmission method propagates in space in the form of electromagnetic waves. The propagation speed of electromagnetic waves is close to the speed of light. The calculation formula is as follows: Using this formula, we can solve To estimate the transmission distance: It is the distance The path loss at is the actual propagation distance, is the frequency of the signal, It's the speed of light.
[0009] Preferably, when the distributed transmission element is in operation, when the electric energy in the storage unit is insufficient, the storage valve can be closed by an induction method, and the electric energy output by the photovoltaic receiving end can be stored by the storage unit. When the storage is completed, the storage valve is automatically opened by an induction method to store the electric energy output by the photovoltaic receiving end into the power grid; The distributed transmission elements transmit electrical energy in the following ways: Power transmission refers to when light shines on a photovoltaic panel, the energy of the photons is absorbed by the electrons in the photovoltaic panel, so that the electrons gain enough energy to escape from the atoms, forming free electrons and holes. These free electrons and holes form an electric field inside the material, thereby generating voltage and current. The calculation method is as follows: in It is electrical energy. is the voltage, is the current, It’s time; is the energy stored in the battery, is the voltage of the grid, is the amount of electricity in the grid.
[0010] Valve control: Continuously monitors the electrical energy in the storage unit and automatically closes and opens the valve when the electrical energy is below and above the preset threshold Method for calculating valve control threshold: in, is the threshold voltage, is the threshold current, Is the interval time of power detection Valve control logic: is the electrical energy of the current storage unit.
[0011] The speed at which the distributed transmission element transmits power and the photovoltaic receiving end transmits and receives power is determined by the following method: The calculation formula for the electric energy received by the photovoltaic receiving end is as follows: Photovoltaic efficiency refers to the efficiency of photovoltaic panels in converting light into electrical energy after receiving it. The global standard photovoltaic constant refers to the density of light energy that a photovoltaic panel can receive under standard test conditions. The radiation refers to the density of light energy actually received locally. The photovoltaic panel working time refers to the length of time the photovoltaic panel works.
[0012] Preferably, when the optical fiber sensor cannot detect the light source, the current stored in the distributed transmission element can be slowly transmitted to the power grid, and the transmission speed is related to the time when the light source appears next time; After predicting the next time when the light source appears, the speed at which the distributed transmission element outputs electrical energy is calculated based on the predicted time to ensure that when the light source appears next time, the storage unit of the distributed transmission element still has electrical energy to output to the grid. The calculation formula is as follows: The method for automatically adjusting the speed at which distributed transmission elements output electrical energy is as follows: First, the environment of the photovoltaic receiving end is predicted by the prediction method to predict the time when the next light source will appear: The prediction method is to convert the light source appearance time data into date and time format and add features that are not related to the light source. The specific calculation formula is as follows: is the predicted value of the light source appearance time, is a trend function, which indicates the change of time series over time. is a seasonal function, which indicates the change of time series in different time periods. is the holiday function, which indicates the impact of holidays on time series. is the error term.
[0013] Preferably, when the optical fiber sensor fails to detect the light source and detects the light source for the first time, the signal can be transmitted to the staff through a wireless transmission method.
[0014] Preferably, the formula for calculating the light intensity by the optical fiber sensor and the direct comparison method is as follows: represents the light intensity, Indicates that light passes through the surface element The power, represents the area of the surface element through which light passes, It represents the time it takes for light to pass through the surface element; Direct comparison method, used to compare the difference between the intensities of two or more light sources.
[0015] Preferably, the method for calculating the angle between the maximum intensity light source and the photovoltaic receiving end is as follows: Since the distance between the maximum intensity of the light source and the photovoltaic receiving end is known, the observation method measures the straight-line distance between the two to form a right triangle, and the incident angle can be calculated by the tangent function: θ is the angle, It is a tangent function, the vertical distance is the distance from the photovoltaic receiving end to the light source in the vertical direction, and the horizontal distance is the distance from the photovoltaic receiving end to the light source in the horizontal direction; The observation method measures the straight-line distance between the maximum intensity of the light source and the photovoltaic receiving end, which is the square relationship of the attenuation of the light intensity emitted by the light source as the distance increases. The attenuation law can be expressed as: is the light intensity, is the total power emitted by the light source, It is the straight-line distance between the light source and the photovoltaic receiving end.
[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In this method for enhancing the photovoltaic efficiency of photovoltaic modules, the light source in the environment is detected in real time, and then the maximum intensity of the light source is calculated, and then the photovoltaic receiving end is adjusted to ensure that the photovoltaic receiving end can continuously receive the maximum light source, thereby enhancing the photovoltaic efficiency of the photovoltaic module. At the same time, when the photovoltaic receiving end cannot detect the light source, the speed of the storage unit in the distributed transmission element transmitting electric energy to the power grid is calculated by predicting the next time the light source appears, ensuring that when the photovoltaic receiving end does not receive electric energy, there is still electric energy transmitted to the power grid. In the process of receiving electric energy, the chemical reaction will form a dynamic balance. When the electric energy in the power grid is used, the reaction will tend to maintain the voltage of the power grid to maintain a stable output of current in the power grid, so that power loss will be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is an operation flow chart of the present invention. DETAILED DESCRIPTION
[0018] The following will be combined with the accompanying drawings in 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.
[0019] A method for enhancing the photovoltaic efficiency of a photovoltaic module comprises the following steps: S1. When the photovoltaic receiving end needs to be adjusted, the ambient light source is first sensed through the optical fiber sensor, and then the maximum value of the light source is compared; S2. After comparing the maximum value of the light source, calculate the required tilt angle of the photovoltaic receiving end, and then send the angle to the adjustment system to adjust the photovoltaic receiving end; S3. When the photovoltaic receiving end receives the light source, it can convert the light source into electric energy. At this time, the electric energy will be transmitted to the power grid. When the power grid receives the electric energy, it needs to calculate the transmission speed through the distributed transmission element, and then transmit the electric energy to the power grid. When the distributed transmission element outputs the electric energy, it can store part of the electric energy itself. After the storage is completed, the electric energy received by the photovoltaic receiving end is continuously transmitted to the power grid. At this time, the speed of the transmitted electric energy is the same as the speed of the distributed transmission element receiving the electric energy; S4. When there is no light source at the location detected by the optical fiber sensor, the distributed transmission element automatically adjusts the speed of outputting electric energy to the power grid. At this time, the speed of outputting electric energy is determined according to the prediction method to determine the next time to receive electric energy.
[0020] The photovoltaic receiving end adjusts the receiving end tilt angle through the optical fiber sensor as follows: First, the change of ambient light source is sensed by the change of light intensity of the optical fiber sensor. The optical fiber sensor usually adopts the structure of optical fiber. One end of the optical fiber receives the light from the light source. The light undergoes multiple reflections and refractions inside the optical fiber and finally reaches the other end of the optical fiber. The light intensity information of the ambient light source is obtained by measuring the light intensity at the other end of the optical fiber. After detecting the light source in the environment, the maximum intensity of the light source is analyzed by direct comparison method.
[0021] After calculating the angle between the maximum intensity and the photovoltaic receiving end, the angle between the maximum intensity light source and the photovoltaic receiving end is calculated, and finally the angle to be adjusted is output to the adjustment system through wireless transmission method to adjust the position of the photovoltaic receiving end.
[0022] The method to calculate the angle between the maximum intensity and the photovoltaic receiving end is as follows: Right triangle method: Since the distance between the maximum intensity of the light source and the photovoltaic receiving end is known, the observation method measures the straight-line distance between the two to form a right triangle. The incident angle can be calculated by the tangent function: θ is the angle, It is a tangent function. The vertical distance is the distance from the photovoltaic receiving end to the light source in the vertical direction, and the horizontal distance is the distance from the photovoltaic receiving end to the light source in the horizontal direction.
[0023] The observation method measures the straight-line distance between the maximum intensity of the light source and the photovoltaic receiving end, which is the square relationship of the attenuation of the light intensity emitted by the light source as the distance increases. The attenuation law can be expressed as: is the light intensity, is the total power emitted by the light source, is the straight-line distance between the light source and the photovoltaic receiving end; Wireless transmission method propagates in space in the form of electromagnetic waves. The propagation speed of electromagnetic waves is close to the speed of light. The calculation formula is as follows: Using this formula, we can solve To estimate the transmission distance: It is the distance The path loss at is the actual propagation distance, is the frequency of the signal, It's the speed of light.
[0024] A method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 1, characterized in that: when the distributed transmission element is in operation, when the electric energy in the storage unit is insufficient, the storage valve can be closed by an induction method, and the electric energy output by the photovoltaic receiving end can be stored by the storage unit, and when the storage is completed, the storage valve can be automatically opened by an induction method to store the electric energy output by the photovoltaic receiving end into the power grid; The distributed transmission elements transmit electrical energy in the following ways: Power transmission refers to when light shines on a photovoltaic panel, the energy of the photons is absorbed by the electrons in the photovoltaic panel, so that the electrons gain enough energy to escape from the atoms, forming free electrons and holes. These free electrons and holes form an electric field inside the material, thereby generating voltage and current. The calculation method is as follows: in It is electrical energy. is the voltage, is the current, It’s time; is the energy stored in the battery, is the voltage of the grid, is the amount of electricity in the grid.
[0025] Valve control: Continuously monitors the electrical energy in the storage unit and automatically closes and opens the valve when the electrical energy is below and above the preset threshold Method for calculating valve control threshold: in, is the threshold voltage, is the threshold current, Is the interval time of power detection Valve control logic: is the electrical energy of the current storage unit.
[0026] The speed at which the distributed transmission element transmits power and the photovoltaic receiving end transmits and receives power is determined by the following method: The calculation formula for the electric energy received by the photovoltaic receiving end is as follows: Photovoltaic efficiency refers to the efficiency of photovoltaic panels in converting light into electrical energy after receiving it. The global standard photovoltaic constant refers to the density of light energy that a photovoltaic panel can receive under standard test conditions. The radiation refers to the density of light energy actually received locally. The photovoltaic panel working time refers to the length of time the photovoltaic panel works.
[0027] When the optical fiber sensor cannot detect the light source, the current stored in the distributed transmission element can be slowly transmitted to the power grid, and the transmission speed is related to the time when the light source appears next time; After predicting the next time when the light source appears, the speed at which the distributed transmission element outputs electrical energy is calculated based on the predicted time to ensure that when the light source appears next time, the storage unit of the distributed transmission element still has electrical energy to output to the grid. The calculation formula is as follows: The method for automatically adjusting the speed at which distributed transmission elements output electrical energy is as follows: First, the environment of the photovoltaic receiving end is predicted by the prediction method to predict the time when the next light source will appear: The prediction method is to convert the light source appearance time data into date and time format and add features that are not related to the light source. The specific calculation formula is as follows: is the predicted value of the light source appearance time, is a trend function, which indicates the change of time series over time. is a seasonal function, which indicates the change of time series in different time periods. is the holiday function, which indicates the impact of holidays on time series. is the error term.
[0028] When the optical fiber sensor fails to detect the light source and detects the light source for the first time, the signal can be transmitted to the staff through wireless transmission method.
[0029] The formula for calculating light intensity using a fiber optic sensor and direct comparison method is as follows: represents the light intensity, Indicates that light passes through the surface element The power, represents the area of the surface element through which light passes, It represents the time it takes for light to pass through the surface element; Direct comparison method, used to compare the difference between the intensities of two or more light sources.
[0030] The method for calculating the angle between the maximum intensity light source and the photovoltaic receiving end is as follows: Since the distance between the maximum intensity of the light source and the photovoltaic receiving end is known, the observation method measures the straight-line distance between the two to form a right triangle, and the incident angle can be calculated by the tangent function: θ is the angle, It is a tangent function, the vertical distance is the distance from the photovoltaic receiving end to the light source in the vertical direction, and the horizontal distance is the distance from the photovoltaic receiving end to the light source in the horizontal direction; The observation method measures the straight-line distance between the maximum intensity of the light source and the photovoltaic receiving end, which is the square relationship of the attenuation of the light intensity emitted by the light source as the distance increases. The attenuation law can be expressed as: is the light intensity, is the total power emitted by the light source, It is the straight-line distance between the light source and the photovoltaic receiving end.
[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A method for enhancing the photovoltaic efficiency of a photovoltaic module, characterized in that: The method comprises the following steps: S1. When the photovoltaic receiving end needs to be adjusted, the ambient light source is first sensed through the optical fiber sensor, and then the maximum value of the light source is compared; S2. After comparing the maximum value of the light source, calculate the required tilt angle of the photovoltaic receiving end, and then send the angle to the adjustment system to adjust the photovoltaic receiving end; S3. When the photovoltaic receiving end receives the light source, it can convert the light source into electric energy. At this time, the electric energy will be transmitted to the power grid. When the power grid receives the electric energy, it needs to calculate the transmission speed through the distributed transmission element, and then transmit the electric energy to the power grid. When the distributed transmission element outputs the electric energy, it can store part of the electric energy itself. After the storage is completed, the electric energy received by the photovoltaic receiving end is continuously transmitted to the power grid. At this time, the speed of the transmitted electric energy is the same as the speed of the distributed transmission element receiving the electric energy; S4. When there is no light source at the location detected by the optical fiber sensor, the distributed transmission element automatically adjusts the speed of outputting electric energy to the power grid. At this time, the speed of outputting electric energy is determined according to the prediction method to determine the next time to receive electric energy.
2. A method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 1, characterized in that: The photovoltaic receiving end adjusts the tilt angle of the receiving end through the optical fiber sensor as follows: First, the change of ambient light source is sensed by the change of light intensity of the optical fiber sensor. The optical fiber sensor usually adopts the structure of optical fiber. One end of the optical fiber receives the light from the light source. The light undergoes multiple reflections and refractions inside the optical fiber and finally reaches the other end of the optical fiber. The light intensity information of the ambient light source is obtained by measuring the light intensity at the other end of the optical fiber. After detecting the light source in the environment, the maximum intensity of the light source is analyzed by direct comparison method.
3. A method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 1, characterized in that: After calculating the angle between the maximum intensity and the photovoltaic receiving end, the angle between the maximum intensity light source and the photovoltaic receiving end is calculated, and finally the angle to be adjusted is output to the adjustment system through wireless transmission method to adjust the position of the photovoltaic receiving end.
4. The method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 1, characterized in that: When the distributed transmission element is in operation, if the electric energy in the storage unit is insufficient, the storage valve can be closed by an induction method, and the electric energy output by the photovoltaic receiving end can be stored by the storage unit. When the storage is completed, the storage valve is automatically opened by an induction method, and the electric energy output by the photovoltaic receiving end is stored in the power grid.
5. The method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 1, characterized in that: When the optical fiber sensor cannot detect the light source, the current stored in the distributed transmission element can be slowly transmitted to the power grid, and the transmission speed is related to the time when the light source appears next time; After predicting the next time when the light source appears, the speed at which the distributed transmission element outputs electrical energy is calculated based on the predicted time to ensure that when the light source appears next time, the storage unit of the distributed transmission element still has electrical energy to output to the grid. The calculation formula is as follows:
6. A method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 5, characterized in that: When the optical fiber sensor fails to detect the light source and detects the light source for the first time, the signal can be transmitted to the staff through wireless transmission method.
7. A method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 2, characterized in that: The formula for calculating light intensity using a fiber optic sensor and direct comparison method is as follows: represents the light intensity, Indicates that light passes through the surface element The power, represents the area of the surface element through which light passes, It represents the time it takes for light to pass through the surface element; Direct comparison method, used to compare the difference between the intensities of two or more light sources.
8. The method for enhancing the photovoltaic efficiency of a photovoltaic module according to claim 3, characterized in that: The method for calculating the angle between the maximum intensity light source and the photovoltaic receiving end is as follows: Since the distance between the maximum intensity of the light source and the photovoltaic receiving end is known, the observation method measures the straight-line distance between the two, which can form a right triangle. The incident angle can be calculated by the tangent function: θ is the angle, It is a tangent function, the vertical distance is the distance from the photovoltaic receiving end to the light source in the vertical direction, and the horizontal distance is the distance from the photovoltaic receiving end to the light source in the horizontal direction; The observation method measures the straight-line distance between the maximum intensity of the light source and the photovoltaic receiving end, which is the square relationship of the attenuation of the light intensity emitted by the light source as the distance increases. The attenuation law can be expressed as: is the light intensity, is the total power emitted by the light source, It is the straight-line distance between the light source and the photovoltaic receiving end.