Voltage regulation system based on photovoltaic power generation

Abstract

The invention discloses a voltage regulation system based on photovoltaic power generation, and relates to the technical field of photovoltaic power generation, and the system comprises the following modules: a photovoltaic voltage evaluation module which obtains a current photovoltaic output voltage, an environment value and a power supply value, obtains a photovoltaic voltage coefficient through the current photovoltaic output voltage, the environment value and the power supply value, and builds a photovoltaic historical database; bringing the environment value, the power supply value and the photovoltaic voltage coefficient into a photovoltaic historical database; according to the scheme, the photovoltaic voltage coefficient is obtained through the current photovoltaic output voltage, the environment value and the power supply value in the photovoltaic voltage evaluation module, so that the future photovoltaic output voltage can be conveniently predicted according to the actual photovoltaic output voltage condition, the environment condition and the solar cell panel condition; and therefore, the photovoltaic output voltage can be conveniently adjusted, so that the load user can preferentially use the electric energy of photovoltaic power generation, and the hysteresis of temporary adjustment of the voltage can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a voltage regulation system based on photovoltaic power generation. Background Art

[0002] Photovoltaic power generation is the use of solar panels to generate electricity to meet the electricity needs of market life. Photovoltaic power generation is essentially different from traditional power generation. Photovoltaic power generation is an environmentally friendly and clean energy. At the same time, photovoltaic power generation is also a sustainable renewable energy. Therefore, photovoltaic power generation has been greatly promoted;

[0003] During the use of photovoltaic power generation, the power stored in the power grid needs to be used to provide power to power load users. Since there is loss in the transmission process, photovoltaic power generation needs to be used first when transmitting power to load users. When the photovoltaic power generation is not enough to support the power required by the load users, the power stored in the power grid is used to provide additional power distribution to the load users. When the photovoltaic power generation provides excess power for the load users, the remaining photovoltaic power generation is transmitted to the power grid for storage. Therefore, as long as the voltage of photovoltaic power generation is adjusted to be higher than the grid voltage, the photovoltaic power generation can be used to supply power to the load users first.

[0004] However, in practical applications, the voltage of photovoltaic power generation will be affected by factors such as light intensity, and the voltage of the power grid will also be affected by factors such as power load. Therefore, in practical applications, it is necessary to adjust the voltage of photovoltaic power generation according to actual conditions to ensure that photovoltaic power generation is used first when transmitting electricity to load users. If the current photovoltaic power generation voltage is compared with the current grid voltage, and then the photovoltaic power generation voltage is adjusted according to the comparison result, there will be a certain lag. In order to facilitate the intelligent prediction and adjustment of the photovoltaic power generation voltage according to actual conditions, we propose a voltage regulation system based on photovoltaic power generation. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the present invention provides a voltage regulation system based on photovoltaic power generation to solve the above problems in the prior art.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A voltage regulation system based on photovoltaic power generation, comprising the following modules:

[0009] The photovoltaic voltage evaluation module obtains the current photovoltaic output voltage, the environmental value, and the power supply value, obtains the photovoltaic voltage coefficient through the current photovoltaic output voltage, the environmental value, and the power supply value, establishes a photovoltaic history database, and incorporates the environmental value, the power supply value, and the photovoltaic voltage coefficient into the photovoltaic history database;

[0010] The grid voltage evaluation module obtains the current grid output voltage, the ambient temperature, the grid load power factor, and obtains the grid voltage coefficient through the current grid output voltage, the ambient temperature and the grid load power factor;

[0011] The photovoltaic voltage adjustment module obtains the photovoltaic voltage prediction coefficient through the photovoltaic historical database and the current photovoltaic voltage coefficient, obtains the grid voltage fluctuation difference coefficient, compares the size relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient, and adjusts the photovoltaic output voltage through the grid voltage fluctuation difference coefficient according to the comparison result.

[0012] Preferably, the environmental value is obtained in the photovoltaic voltage evaluation module, specifically:

[0013] Step 1: Obtain the ambient temperature of each solar panel, and average the ambient temperatures of all solar panels to obtain the temperature value;

[0014] Step 2: Obtain the light intensity around each solar panel, and sum and average the light intensity around all solar panels to obtain the light intensity value;

[0015] Step 3: Get the environment value and light intensity value, and get the environment value through the temperature value or light intensity value;

[0016] The calculation method of the environmental value is as follows:

[0017]

[0018] Among them, Hj represents the environment value, Wd represents the temperature value, Gz represents the light intensity value, θ1 and θ2 are weights, 1>θ1>0, 1>θ2>0.

[0019] Preferably, the power supply value is obtained in the photovoltaic voltage evaluation module, specifically:

[0020] Step 1: Obtain the load resistance of each solar panel respectively, and sum and average the load resistance of all solar panels to obtain the load resistance value;

[0021] Step 2: Obtain the power conversion rate of each solar panel respectively, and sum and average the power conversion rates of all solar panels to obtain the power conversion rate value;

[0022] Step 3: Obtain the number of all photovoltaic solar panels, and multiply the number of all photovoltaic solar panels by the electric energy conversion rate value to obtain the electric energy value;

[0023] Step 4: Obtain the electric energy value, obtain the load resistance value, and obtain the power supply value through the electric energy value and the load resistance value;

[0024] The power supply value is calculated as follows:

[0025]

[0026] Among them, Gd represents the power supply value, Dn represents the electric energy value, Fz represents the load resistance value, δ1 and δ2 are weights, 1>δ1>0, 1>δ2>0.

[0027] Preferably, the photovoltaic voltage coefficient is calculated in the photovoltaic voltage evaluation module as follows:

[0028]

[0029] Among them, Gf represents the photovoltaic voltage coefficient, Dy represents the current photovoltaic output voltage, Hj represents the environmental value, and Gd represents the power supply value. and are weights,

[0030] Preferably, the grid voltage coefficient is calculated in the grid voltage evaluation module as follows:

[0031]

[0032] Wherein, Dw represents the grid voltage coefficient, Wy represents the current grid output voltage, Ys represents the grid load power factor, Hd represents the ambient temperature, ω1 and ω2 are weights, 1>ω1>0, 1>ω2>0.

[0033] Preferably, in the photovoltaic voltage adjustment module, the photovoltaic voltage prediction coefficient is obtained through the photovoltaic history database and the current photovoltaic voltage coefficient, specifically:

[0034] Step 1: Obtain the current photovoltaic voltage coefficient, and obtain the photovoltaic voltage coefficient every minute within five minutes up to the current time in the photovoltaic history database;

[0035] Step 2: Arrange the photovoltaic voltage coefficients of each minute within five minutes up to the current time in chronological order, then make a difference between two photovoltaic voltage coefficients at adjacent times to obtain four photovoltaic voltage coefficient difference values, and sum the four photovoltaic voltage coefficient difference values ​​to obtain the photovoltaic voltage coefficient difference sum value;

[0036] Step 3: Sum the PV voltage coefficient difference and the current PV voltage coefficient to obtain the PV voltage prediction coefficient, and determine the relationship between the PV voltage coefficient difference and 0. If the PV voltage coefficient difference is greater than 0, the PV voltage prediction coefficient is marked as rising; if the PV voltage coefficient difference is less than 0, the PV voltage prediction coefficient is marked as falling.

[0037] Preferably, the grid voltage fluctuation difference coefficient is obtained in the photovoltaic adjustment module, specifically:

[0038] Step 1: Obtain the maximum value of the grid voltage every day in a year up to the current date, and obtain the minimum value of the grid voltage every day in a year up to the current date;

[0039] Step 2: summing up and averaging the maximum values ​​of the grid voltage every day in a year up to the current date to obtain the maximum mean value of the grid voltage, and summing up and averaging the minimum values ​​of the grid voltage every day in a year up to the current date to obtain the minimum mean value of the grid voltage;

[0040] Step 3: Subtract the maximum mean value of the grid voltage from the minimum mean value of the grid voltage to obtain the grid voltage fluctuation difference coefficient.

[0041] Preferably, the photovoltaic voltage prediction coefficient and the grid voltage coefficient are compared in the photovoltaic voltage adjustment module, and the photovoltaic output voltage is adjusted by the grid voltage fluctuation difference coefficient according to the comparison result, specifically:

[0042] Step 1: Obtain the photovoltaic voltage prediction coefficient, obtain the grid voltage coefficient, and subtract the photovoltaic voltage prediction coefficient from the grid voltage coefficient to obtain the voltage difference;

[0043] Step 2: Obtain the grid voltage fluctuation coefficient, determine the magnitude relationship between the voltage difference and 0. If the voltage difference is less than 0, sum the grid voltage fluctuation coefficient and the voltage difference to obtain the upward voltage value, and use the upward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage upward. If the voltage difference is greater than 0, subtract the grid voltage fluctuation coefficient from the voltage difference to obtain the downward voltage value, and use the downward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage downward.

[0044] (III) Beneficial effects

[0045] The present invention provides a voltage regulation system based on photovoltaic power generation, which has the following beneficial effects:

[0046] (1) In the photovoltaic voltage evaluation module, this scheme obtains the photovoltaic voltage coefficient by combining the current photovoltaic output voltage, environmental value and power supply value, so as to facilitate the prediction of the future photovoltaic output voltage according to the actual photovoltaic output voltage, environmental conditions and solar panel conditions, and then facilitate the subsequent comparison with the grid voltage according to the predicted results, and then facilitate the adjustment of the photovoltaic output voltage so that load users give priority to the use of photovoltaic power generation, which is beneficial to avoid the lag of temporary voltage adjustment. By establishing a photovoltaic history database, it is convenient to inspect and adjust the size of photovoltaic panels according to the historical information in the photovoltaic history database.

[0047] (2) In the photovoltaic voltage adjustment module, this scheme obtains the photovoltaic voltage prediction coefficient through the photovoltaic historical database and the current photovoltaic voltage coefficient, so as to facilitate the prediction of the future photovoltaic output voltage. Then, by comparing the size relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient, the size of the photovoltaic output voltage is adjusted according to the grid voltage fluctuation difference coefficient based on the comparison result, so as to further facilitate the load users to give priority to the use of photovoltaic power generation, which is further beneficial to avoid the lag of temporary voltage adjustment, and further beneficial to avoid the loss and waste of electricity in the transmission process caused by the priority use of grid voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of a voltage regulation system based on photovoltaic power generation according to the present invention;

[0049] Figure 2 The present invention is a principle block diagram of a voltage regulation system based on photovoltaic power generation. DETAILED DESCRIPTION

[0050] 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.

[0051] See also Figure 1-Figure 2 The present invention provides a voltage regulation system based on photovoltaic power generation, comprising the following modules:

[0052] The photovoltaic voltage evaluation module obtains the current photovoltaic output voltage, the environmental value, and the power supply value, obtains the photovoltaic voltage coefficient through the current photovoltaic output voltage, the environmental value, and the power supply value, establishes a photovoltaic history database, and incorporates the environmental value, the power supply value, and the photovoltaic voltage coefficient into the photovoltaic history database;

[0053] The grid voltage evaluation module obtains the current grid output voltage, the ambient temperature, the grid load power factor, and obtains the grid voltage coefficient through the current grid output voltage, the ambient temperature and the grid load power factor;

[0054] The photovoltaic voltage adjustment module obtains the photovoltaic voltage prediction coefficient through the photovoltaic historical database and the current photovoltaic voltage coefficient, obtains the grid voltage fluctuation difference coefficient, compares the size relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient, and adjusts the photovoltaic output voltage through the grid voltage fluctuation difference coefficient according to the comparison result;

[0055] The calculation method of the photovoltaic voltage coefficient in the photovoltaic voltage evaluation module is as follows:

[0056]

[0057] Among them, Gf represents the photovoltaic voltage coefficient, Dy represents the current photovoltaic output voltage, Hj represents the environmental value, and Gd represents the power supply value. and are weights,

[0058] The calculation method of the grid voltage coefficient in the grid voltage evaluation module is as follows:

[0059]

[0060] Wherein, Dw represents the grid voltage coefficient, Wy represents the current grid output voltage, Ys represents the grid load power factor, Hd represents the ambient temperature, ω1 and ω2 are weights, 1>ω1>0, 1>ω2>0.

[0061] In this embodiment, in the photovoltaic voltage evaluation module, the scheme combines the current photovoltaic output voltage, environmental value and power supply value to obtain the photovoltaic voltage coefficient, thereby facilitating the prediction of the future photovoltaic output voltage according to the actual photovoltaic output voltage, environmental condition and solar panel condition, and then facilitating the subsequent comparison with the grid voltage according to the predicted result, and then facilitating the adjustment of the photovoltaic output voltage so that the load users give priority to the use of photovoltaic power generation, and then helping to avoid the lag of temporary voltage adjustment, and by establishing a photovoltaic history database, it is convenient to overhaul and adjust the scale of photovoltaic panels according to the historical information in the photovoltaic history database;

[0062] In this scheme, the grid voltage coefficient is obtained in the grid voltage evaluation module through the current grid output voltage, ambient temperature and grid load power factor, so as to combine the current grid output voltage, ambient temperature and grid load power factor, so as to facilitate the prediction of the future grid output voltage according to the actual grid voltage, temperature and actual power supply load, and then facilitate the subsequent comparison with the photovoltaic output voltage according to the prediction result, and then facilitate the adjustment of the photovoltaic output voltage, and then further facilitate the load users to give priority to the use of photovoltaic power generation, and then further help to avoid the hysteresis of temporary voltage adjustment, and also help to avoid the loss and waste of electric energy in the transmission process caused by the priority use of grid voltage;

[0063] In the photovoltaic voltage adjustment module, this solution obtains the photovoltaic voltage prediction coefficient through the photovoltaic history database and the current photovoltaic voltage coefficient, so as to facilitate the prediction of the future photovoltaic output voltage, and then by comparing the magnitude relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient, the magnitude of the photovoltaic output voltage is adjusted according to the grid voltage fluctuation difference coefficient according to the comparison result, so as to further facilitate the load users to give priority to the use of photovoltaic power generation, and further help to avoid the hysteresis of temporary voltage adjustment, and further help to avoid the loss and waste of electricity in the transmission process caused by giving priority to the use of grid voltage;

[0064] It is worth mentioning that the weight values ​​in this scheme can be obtained through the hierarchical analysis method, which will not be elaborated here.

[0065] The environmental values ​​are obtained in the photovoltaic voltage evaluation module, specifically:

[0066] Step 1: Obtain the ambient temperature of each solar panel, and average the ambient temperatures of all solar panels to obtain the temperature value;

[0067] Step 2: Obtain the light intensity around each solar panel, and sum and average the light intensity around all solar panels to obtain the light intensity value;

[0068] Step 3: Get the environment value and light intensity value, and get the environment value through the temperature value or light intensity value;

[0069] The calculation method of the environmental value is as follows:

[0070]

[0071] Among them, Hj represents the environment value, Wd represents the temperature value, Gz represents the light intensity value, θ1 and θ2 are weights, 1>θ1>0, 1>θ2>0.

[0072] In this embodiment, the temperature value is obtained by integrating the temperature around all solar panels, so that the environmental value of the photovoltaic voltage can be calculated according to the temperature value. The light intensity value is obtained by integrating the light intensity around all solar panels, so that the environmental value of the photovoltaic voltage can be calculated according to the light intensity value. Therefore, it is convenient to calculate the photovoltaic output voltage according to the actual temperature and light intensity of the photovoltaic panels, which is beneficial to improve the accuracy of the prediction results.

[0073] The power supply value is obtained in the photovoltaic voltage evaluation module, specifically:

[0074] Step 1: Obtain the load resistance of each solar panel respectively, and sum and average the load resistance of all solar panels to obtain the load resistance value;

[0075] Step 2: Obtain the power conversion rate of each solar panel respectively, and sum and average the power conversion rates of all solar panels to obtain the power conversion rate value;

[0076] Step 3: Obtain the number of all photovoltaic solar panels, and multiply the number of all photovoltaic solar panels by the electric energy conversion rate value to obtain the electric energy value;

[0077] Step 4: Obtain the electric energy value, obtain the load resistance value, and obtain the power supply value through the electric energy value and the load resistance value;

[0078] The power supply value is calculated as follows:

[0079]

[0080] Among them, Gd represents the power supply value, Dn represents the electric energy value, Fz represents the load resistance value, δ1 and δ2 are weights, 1>δ1>0, 1>δ2>0.

[0081] In this embodiment, by integrating the load resistance of all solar panels, it is helpful to calculate the power loss of photovoltaic panels during the transmission process according to actual conditions, and then facilitate the subsequent prediction of photovoltaic output voltage. The power conversion rate value is obtained by integrating the power conversion rates of all solar panels, and then the power value is obtained by multiplying the power conversion rate value by the number of all photovoltaic solar panels. Finally, the power supply value is obtained by the power value and the load resistance value, which is convenient for the subsequent calculation of the photovoltaic voltage coefficient, and then it is convenient to adjust the photovoltaic output voltage according to the predicted photovoltaic voltage coefficient.

[0082] In the photovoltaic voltage adjustment module, the photovoltaic voltage prediction coefficient is obtained through the photovoltaic history database and the current photovoltaic voltage coefficient, which is specifically:

[0083] Step 1: Obtain the current photovoltaic voltage coefficient, and obtain the photovoltaic voltage coefficient every minute within five minutes up to the current time in the photovoltaic history database;

[0084] Step 2: Arrange the photovoltaic voltage coefficients of each minute within five minutes up to the current time in chronological order, then make a difference between two photovoltaic voltage coefficients at adjacent times to obtain four photovoltaic voltage coefficient difference values, and sum the four photovoltaic voltage coefficient difference values ​​to obtain the photovoltaic voltage coefficient difference sum value;

[0085] Step 3: Sum the PV voltage coefficient difference and the current PV voltage coefficient to obtain the PV voltage prediction coefficient, and determine the relationship between the PV voltage coefficient difference and 0. If the PV voltage coefficient difference is greater than 0, the PV voltage prediction coefficient is marked as rising; if the PV voltage coefficient difference is less than 0, the PV voltage prediction coefficient is marked as falling.

[0086] In this embodiment, the current photovoltaic voltage coefficient is combined with historical data in the photovoltaic history database to predict the future photovoltaic output voltage to obtain the photovoltaic voltage prediction coefficient, which facilitates the subsequent adjustment of the photovoltaic output voltage based on the comparison between the photovoltaic voltage prediction coefficient and the grid voltage coefficient.

[0087] The grid voltage fluctuation coefficient is obtained in the photovoltaic adjustment module, specifically:

[0088] Step 1: Obtain the maximum value of the grid voltage every day in a year up to the current date, and obtain the minimum value of the grid voltage every day in a year up to the current date;

[0089] Step 2: summing up and averaging the maximum values ​​of the grid voltage every day in a year up to the current date to obtain the maximum mean value of the grid voltage, and summing up and averaging the minimum values ​​of the grid voltage every day in a year up to the current date to obtain the minimum mean value of the grid voltage;

[0090] Step 3: Subtract the maximum mean value of the grid voltage from the minimum mean value of the grid voltage to obtain the grid voltage fluctuation difference coefficient.

[0091] In this embodiment, the grid voltage fluctuation difference coefficient is obtained by calculating the historical fluctuation amplitude of the grid voltage, so as to facilitate the subsequent adjustment of the photovoltaic output voltage according to the grid voltage fluctuation difference coefficient, which is beneficial to avoid the grid voltage being higher than the photovoltaic output voltage after fluctuation, and further beneficial to give priority to using photovoltaic power to power load users.

[0092] In the photovoltaic voltage adjustment module, the relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient is compared, and the photovoltaic output voltage is adjusted by the grid voltage fluctuation difference coefficient according to the comparison result, specifically:

[0093] Step 1: Obtain the photovoltaic voltage prediction coefficient, obtain the grid voltage coefficient, and subtract the photovoltaic voltage prediction coefficient from the grid voltage coefficient to obtain the voltage difference;

[0094] Step 2: Obtain the grid voltage fluctuation coefficient, determine the magnitude relationship between the voltage difference and 0. If the voltage difference is less than 0, sum the grid voltage fluctuation coefficient and the voltage difference to obtain the upward voltage value, and use the upward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage upward. If the voltage difference is greater than 0, subtract the grid voltage fluctuation coefficient from the voltage difference to obtain the downward voltage value, and use the downward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage downward.

[0095] In this embodiment, by judging the magnitude relationship between the voltage difference and 0, it is convenient to determine the magnitude relationship between the prediction result of the photovoltaic output voltage and the prediction result of the grid voltage, and adjust the magnitude of the current photovoltaic output voltage according to the comparison result, so that the future photovoltaic output voltage is higher than the future grid output voltage, which is beneficial for load users to give priority to the use of photovoltaic power generation, and is beneficial to avoid the lag of temporary voltage adjustment.

[0096] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented using software, the above embodiments may be implemented in whole or in part in the form of a computer program product. A person of ordinary skill in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution.

[0097] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0098] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A voltage regulation system based on photovoltaic power generation, characterized in that: Includes the following modules: The photovoltaic voltage evaluation module obtains the current photovoltaic output voltage, the environmental value, and the power supply value, obtains the photovoltaic voltage coefficient through the current photovoltaic output voltage, the environmental value, and the power supply value, establishes a photovoltaic history database, and incorporates the environmental value, the power supply value, and the photovoltaic voltage coefficient into the photovoltaic history database; The grid voltage evaluation module obtains the current grid output voltage, the ambient temperature, the grid load power factor, and obtains the grid voltage coefficient through the current grid output voltage, the ambient temperature and the grid load power factor; The photovoltaic voltage adjustment module obtains the photovoltaic voltage prediction coefficient through the photovoltaic historical database and the current photovoltaic voltage coefficient, obtains the grid voltage fluctuation difference coefficient, compares the size relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient, and adjusts the photovoltaic output voltage through the grid voltage fluctuation difference coefficient according to the comparison result.

2. A voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: The environmental values ​​are obtained in the photovoltaic voltage evaluation module, specifically: Step 1: Obtain the ambient temperature of each solar panel, and average the ambient temperatures of all solar panels to obtain the temperature value; Step 2: Obtain the light intensity around each solar panel, and sum and average the light intensity around all solar panels to obtain the light intensity value; Step 3: Get the environment value and light intensity value, and get the environment value through the temperature value or light intensity value; The calculation method of the environmental value is as follows: Among them, Hj represents the environment value, Wd represents the temperature value, Gz represents the light intensity value, θ1 and θ2 are weights, 1>θ1>0, 1>θ2>0.

3. The voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: The power supply value is obtained in the photovoltaic voltage evaluation module, specifically: Step 1: Obtain the load resistance of each solar panel respectively, and sum and average the load resistance of all solar panels to obtain the load resistance value; Step 2: Obtain the power conversion rate of each solar panel respectively, and sum and average the power conversion rates of all solar panels to obtain the power conversion rate value; Step 3: Obtain the number of all photovoltaic solar panels, and multiply the number of all photovoltaic solar panels by the electric energy conversion rate value to obtain the electric energy value; Step 4: Obtain the electric energy value, obtain the load resistance value, and obtain the power supply value through the electric energy value and the load resistance value; The power supply value is calculated as follows: Among them, Gd represents the power supply value, Dn represents the electric energy value, Fz represents the load resistance value, δ1 and δ2 are weights, 1>δ1>0, 1>δ2>0.

4. The voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: The calculation method of the photovoltaic voltage coefficient in the photovoltaic voltage evaluation module is as follows: Among them, Gf represents the photovoltaic voltage coefficient, Dy represents the current photovoltaic output voltage, Hj represents the environmental value, and Gd represents the power supply value. and are weights, 5. The voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: The calculation method of the grid voltage coefficient in the grid voltage evaluation module is as follows: Wherein, Dw represents the grid voltage coefficient, Wy represents the current grid output voltage, Ys represents the grid load power factor, Hd represents the ambient temperature, ω1 and ω2 are weights, 1>ω1>0, 1>ω2>0.

6. A voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: In the photovoltaic voltage adjustment module, the photovoltaic voltage prediction coefficient is obtained through the photovoltaic history database and the current photovoltaic voltage coefficient, which is specifically: Step 1: Obtain the current photovoltaic voltage coefficient, and obtain the photovoltaic voltage coefficient every minute within five minutes up to the current time in the photovoltaic history database; Step 2: Arrange the photovoltaic voltage coefficients of each minute within five minutes up to the current time in chronological order, then make a difference between two photovoltaic voltage coefficients at adjacent times to obtain four photovoltaic voltage coefficient difference values, and sum the four photovoltaic voltage coefficient difference values ​​to obtain the photovoltaic voltage coefficient difference sum value; Step 3: Sum the PV voltage coefficient difference and the current PV voltage coefficient to obtain the PV voltage prediction coefficient, and determine the relationship between the PV voltage coefficient difference and 0. If the PV voltage coefficient difference is greater than 0, the PV voltage prediction coefficient is marked as rising; if the PV voltage coefficient difference is less than 0, the PV voltage prediction coefficient is marked as falling.

7. The voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: The grid voltage fluctuation coefficient is obtained in the photovoltaic adjustment module, specifically: Step 1: Obtain the maximum value of the grid voltage every day in a year up to the current date, and obtain the minimum value of the grid voltage every day in a year up to the current date; Step 2: summing up and averaging the maximum values ​​of the grid voltage every day in a year up to the current date to obtain the maximum mean value of the grid voltage, and summing up and averaging the minimum values ​​of the grid voltage every day in a year up to the current date to obtain the minimum mean value of the grid voltage; Step 3: Subtract the maximum mean value of the grid voltage from the minimum mean value of the grid voltage to obtain the grid voltage fluctuation difference coefficient.

8. The voltage regulation system based on photovoltaic power generation according to claim 1, characterized in that: In the photovoltaic voltage adjustment module, the relationship between the photovoltaic voltage prediction coefficient and the grid voltage coefficient is compared, and the photovoltaic output voltage is adjusted by the grid voltage fluctuation difference coefficient according to the comparison result, specifically: Step 1: Obtain the photovoltaic voltage prediction coefficient, obtain the grid voltage coefficient, and subtract the photovoltaic voltage prediction coefficient from the grid voltage coefficient to obtain the voltage difference; Step 2: Obtain the grid voltage fluctuation coefficient, determine the magnitude relationship between the voltage difference and 0. If the voltage difference is less than 0, sum the grid voltage fluctuation coefficient and the voltage difference to obtain the upward voltage value, and use the upward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage upward. If the voltage difference is greater than 0, subtract the grid voltage fluctuation coefficient from the voltage difference to obtain the downward voltage value, and use the downward voltage value as the voltage regulation amount to adjust the photovoltaic output voltage downward.

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