A power regulation method and system

Abstract

The present invention provides a power regulation method and system, which obtains photovoltaic power data and inverter rated power, wherein the photovoltaic power data includes the day-ahead predicted power and the intraday ultra-short-term predicted power, and determines whether the intraday ultra-short-term predicted power is less than the inverter rated power. If it is less than, based on the prediction accuracy and the grid backup capacity, a tracking axis regulation method or an inverter regulation method is used to perform power regulation. If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation. That is, in the present invention, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation, so as to avoid overloading the inverter, thereby increasing the service life of the inverter.

Description

Technical Field

[0001] The present invention relates to the field of power regulation, and more specifically, to a power regulation method and system. Background Art

[0002] In order to improve the comprehensive utilization rate of photovoltaic systems and reduce the system's power generation costs, photovoltaic power stations will appropriately increase the ratio of photovoltaic power station component capacity to inverter capacity during design. This will result in a large deviation between the output power of the photovoltaic array and the reported power when the irradiation conditions are sufficient, and sometimes exceed the maximum output power allowed by the inverter.

[0003] At this time, although the inverter has the ability to operate with limited power overload, this will reduce the inverter's power conversion efficiency to a certain extent, increase the loss of the inverter when it is overloaded, and may also cause a certain impact on the inverter equipment, affecting its service life. Summary of the invention

[0004] In view of this, the present invention provides a power regulation method and system to solve the problem of affecting the service life of the inverter when the output power of the photovoltaic array has a large deviation from the reported power.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A power regulation method, comprising:

[0007] Acquire photovoltaic power data and inverter rated power, wherein the photovoltaic power data includes day-ahead predicted power and intraday ultra-short-term predicted power;

[0008] Determining whether the intraday ultra-short-term predicted power is less than the rated power of the inverter;

[0009] If it is less than, then based on the prediction accuracy and the grid reserve capacity, the tracking axis adjustment method or the inverter adjustment method is used to adjust the power; the prediction accuracy is calculated based on the day-ahead predicted power and the intra-day ultra-short-term predicted power;

[0010] If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, power regulation is performed by adopting at least one of the tracking axis regulation method and the inverter regulation method.

[0011] Optionally, obtain photovoltaic power data, including:

[0012] Get weather data;

[0013] A short-term power forecasting operation is performed on the meteorological data to obtain a day-ahead predicted power, and an ultra-short-term power forecasting operation is performed on the meteorological data to obtain an intra-day ultra-short-term predicted power.

[0014] Optionally, based on the prediction accuracy and the grid reserve capacity, a tracking axis adjustment method or an inverter adjustment method is used to adjust the power, including:

[0015] When the intra-day ultra-short-term predicted power is greater than the day-ahead predicted power, calculating the prediction accuracy based on the day-ahead predicted power and the intra-day ultra-short-term predicted power;

[0016] If the prediction accuracy is greater than a preset accuracy threshold, obtaining the grid backup capacity;

[0017] In the case where the grid reserve capacity is greater than the intra-day ultra-short-term predicted power, calculating the difference between the grid reserve capacity and the intra-day ultra-short-term predicted power and using it as the over-generation power threshold;

[0018] Power regulation is performed using a tracking axis regulation method or an inverter regulation method according to the intra-day ultra-short-term predicted power, the day-ahead predicted power, and the over-generation power threshold.

[0019] Optionally, according to the intra-day ultra-short-term predicted power, the day-ahead predicted power and the over-generation power threshold, power regulation is performed by adopting a tracking axis regulation mode or an inverter regulation mode, including:

[0020] Calculate the difference between the intra-day ultra-short-term predicted power and the day-ahead predicted power, and use it as the excess power;

[0021] If the over-generation power is greater than the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method.

[0022] Optionally, a tracking axis regulation method or an inverter regulation method is used for power regulation, including:

[0023] The inverter is used to perform power limiting adjustment so that the output power is the over-generation power threshold, or the tracking axis is used to perform power limiting adjustment so that the output power is the over-generation power threshold.

[0024] Optionally, performing power limit adjustment by tracking the axis so that the output power is the over-generation power threshold includes:

[0025] Determining the effective irradiance corresponding to the over-power threshold;

[0026] A tracking angle corresponding to the effective irradiance is determined, and a tracking axis angle is adjusted according to the tracking angle so that the output power is the over-power threshold.

[0027] Optionally, when the grid reserve capacity is not greater than the intraday ultra-short-term predicted power, the method further includes:

[0028] The inverter is used to perform power limiting adjustment so that the output power is the day-ahead predicted power.

[0029] Optionally, based on the relative magnitude relationship between the day-ahead predicted power and the rated power of the inverter, at least one of a tracking axis adjustment mode and an inverter adjustment mode is used to adjust the power, including:

[0030] Determining whether the day-ahead predicted power is not greater than the inverter rated power;

[0031] If yes, determining the relationship between the specified multiple of the day-ahead predicted power and the rated power of the inverter;

[0032] If the magnitude relationship is greater than, adjusting the tracking axis angle to adjust the output power to the rated power of the inverter;

[0033] If the magnitude relationship is not greater than, the output power is adjusted to the rated power of the inverter by adjusting the tracking axis angle, and the output power is adjusted to a specified multiple of the day-ahead predicted power by adjusting the inverter.

[0034] Optionally, when the day-ahead predicted power is greater than the inverter rated power, the further comprising:

[0035] The tracking axis angle is adjusted to adjust the output power to the rated power of the inverter.

[0036] A power regulation system comprises a power regulation controller for executing the above power regulation method.

[0037] Optionally, a tracking axis and an inverter are also included;

[0038] The tracking axis and the inverter are used to perform power regulation operations based on the control of the power regulation controller.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention provides a power regulation method and system, which obtains photovoltaic power data and inverter rated power, wherein the photovoltaic power data includes the day-ahead predicted power and the intraday ultra-short-term predicted power, and determines whether the intraday ultra-short-term predicted power is less than the inverter rated power. If it is less than, based on the prediction accuracy and the grid backup capacity, a tracking axis regulation method or an inverter regulation method is used to perform power regulation. If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation. That is, in the present invention, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation, so as to avoid overloading the inverter, thereby increasing the service life of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0042] Figure 1 A method flow chart of a power regulation method provided by an embodiment of the present invention;

[0043] Figure 2 A method flow chart of another power regulation method provided by an embodiment of the present invention;

[0044] Figure 3 A method flow chart of another power regulation method provided by an embodiment of the present invention;

[0045] Figure 4 A schematic diagram of the structure of a power regulation system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] 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.

[0047] In order to ensure the safe and high-quality operation of the regional power grid system, the grid-connected operation of photovoltaic power stations needs to cooperate with the dispatching center to carry out power regulation.

[0048] On the one hand, if the power forecast of the photovoltaic power station is inaccurate, it may cause large fluctuations in the regional power grid and reduced stability. In order to avoid this phenomenon, it is necessary to consider the overall situation of the photovoltaic power station system and make global adjustments to the photovoltaic power generation power in a timely manner.

[0049] On the other hand, in order to improve the comprehensive utilization rate of photovoltaic systems and reduce the system's power generation costs, photovoltaic power stations will appropriately increase the ratio of photovoltaic power station component capacity to inverter capacity during design. This will result in a large deviation between the output power of the photovoltaic array and the reported power when the irradiation conditions are sufficient, and sometimes exceed the maximum output power allowed by the inverter.

[0050] At this time, although the inverter has the ability to operate with limited power overload, this will reduce the inverter's power conversion efficiency to a certain extent, increase the loss of the inverter when it is overloaded, and may also cause a certain impact on the inverter equipment, affecting its service life.

[0051] In order to solve this problem, the method of adjusting the power by adjusting the tracking axis angle can be combined with the inverter adjustment method, and the two can work together to adjust the photovoltaic output power.

[0052] Specifically, the present invention provides a power regulation method and system, which obtains photovoltaic power data and inverter rated power, wherein the photovoltaic power data includes the day-ahead predicted power and the intraday ultra-short-term predicted power, and determines whether the intraday ultra-short-term predicted power is less than the inverter rated power. If it is less than, based on the prediction accuracy and the grid backup capacity, a tracking axis regulation method or an inverter regulation method is used to perform power regulation. If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation. That is, in the present invention, at least one of the tracking axis regulation method and the inverter regulation method is used to perform power regulation, so as to avoid overloading the inverter, thereby increasing the service life of the inverter.

[0053] Based on the above, refer to Figure 1 The present invention provides a power regulation method, which is applied to a power regulation controller. The power regulation method may include:

[0054] S11. Obtain photovoltaic power data and inverter rated power.

[0055] The photovoltaic power data includes the day-ahead predicted power and the intra-day ultra-short-term predicted power.

[0056] In practical applications, the day-ahead power P pre (i) and the intraday ultra-short-term forecast power P in (i) is obtained by using meteorological data prediction, where i is the time period.

[0057] In detail, obtaining photovoltaic power data may include:

[0058] 1) Obtain meteorological data.

[0059] The numerical weather prediction system (NWP) mainly provides the photovoltaic power prediction model with weather forecast data for a period of time in the future, including temperature, humidity, solar irradiance, wind speed, etc.

[0060] 2) performing a short-term power forecasting operation on the meteorological data to obtain a day-ahead predicted power, and performing an ultra-short-term power forecasting operation on the meteorological data to obtain an intra-day ultra-short-term predicted power.

[0061] Specifically, in the photovoltaic power prediction module, if the photovoltaic power station lacks historical data, the physical model can be used for prediction. If the photovoltaic power station has accumulated historical data for a period of time, machine learning methods such as neural networks, random forests, linear regression, and time series can be used for prediction. Generally speaking, the prediction accuracy of machine learning methods is higher than that of physical models.

[0062] Then, through the photovoltaic power prediction module, using meteorological data, the photovoltaic power prediction value of the photovoltaic power station in the future period of time is obtained. For example, the NWP numerical weather forecast system data is used as the input data of the photovoltaic power prediction module, and the power generation power of the photovoltaic power station is predicted day-ahead and the ultra-short-term prediction within the day is performed to obtain the photovoltaic power prediction value. The photovoltaic power prediction value is divided into the day-ahead predicted power P pre (i) and the intraday ultra-short-term forecast power P in (i) Day-ahead power forecast P pre (i) Obtained through short-term power forecast, the intraday ultra-short-term forecast power P in (i) Obtained through ultra-short-term power prediction.

[0063] Day-ahead predicted power P pre (i) and the intraday ultra-short-term forecast power P in (i) The meeting will be reported to the power grid dispatching center.

[0064] In addition, in the embodiment of the present invention, the inverter rated power is P ac (i) indicates that it can be obtained directly.

[0065] S12, determining whether the intraday ultra-short-term predicted power is less than the inverter rated power; if so, executing step S13; if so, executing step S14.

[0066] Specifically, if the actual power generation of the photovoltaic power station deviates greatly from the power reported to the power grid dispatching center, the power regulation controller is required to timely adjust the power generation of the photovoltaic power station globally to avoid large fluctuations in the regional power grid.

[0067] In this step, the intraday ultra-short-term predicted power P is determined. in (i) Is it less than the rated power P of the inverter? ac (i).

[0068] If it is less than, you can use the inverter or tracking axis to adjust the power. If it is not less than, the inverter is in overload operation, and the maximum output power is P ac (i) At this time, the tracking axis and the inverter can be coordinated to adjust the output power.

[0069] S13. Based on the prediction accuracy and the grid reserve capacity, power regulation is performed using a tracking axis regulation method or an inverter regulation method.

[0070] The prediction accuracy is calculated based on the day-ahead predicted power and the intra-day ultra-short-term predicted power.

[0071] S14: Based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of a tracking axis adjustment method and an inverter adjustment method is used to adjust power.

[0072] Specifically, power regulation can be performed by adopting one of the tracking axis regulation mode and the inverter regulation mode, or the two modes can be used in coordination to perform power regulation.

[0073] In this embodiment, photovoltaic power data and inverter rated power are obtained, and the photovoltaic power data includes the day-ahead predicted power and the intraday ultra-short-term predicted power. It is determined whether the intraday ultra-short-term predicted power is less than the inverter rated power. If it is less than, the tracking axis adjustment method or the inverter adjustment method is used to adjust the power based on the prediction accuracy and the grid backup capacity. If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of the tracking axis adjustment method and the inverter adjustment method is used to adjust the power. That is, in the present invention, at least one of the tracking axis adjustment method and the inverter adjustment method is used to adjust the power, so as to avoid overloading the inverter, thereby increasing the service life of the inverter.

[0074] Based on the above, refer to Figure 2 , step S13 may include:

[0075] S21. When the intra-day ultra-short-term predicted power is greater than the day-ahead predicted power, calculate the prediction accuracy based on the day-ahead predicted power and the intra-day ultra-short-term predicted power.

[0076] In practical applications, if the intraday ultra-short-term predicted power is greater than the day-ahead predicted power, it means that the actual generated power is greater than the predicted power. Generally speaking, the power fluctuation within a small range has little impact on the regional power grid and can be ignored. Therefore, the predicted power is allowed to have a certain deviation, which may vary depending on the power grid area; the allowed prediction deviation is set, that is, the preset accuracy threshold is M%, and this deviation may vary depending on the region.

[0077] If P in (i) <P ac (i),P pre (i) <P ac (i) At this time, it is more conducive to use the inverter method to adjust the power, and the tracking axis only needs to perform normal intelligent tracking to increase the power generation. In addition, the tracking axis method can also be used to adjust the power.

[0078] If P in (i)≤P pre (i) Since the optimal tracking angle has been reached, the power generation cannot be further increased, so no additional power adjustment strategy is required.

[0079] If P in (i)>P pre (i), at this time, the prediction accuracy needs to be calculated. The calculation formula for prediction accuracy is:

[0080]

[0081] S22: If the prediction accuracy is greater than a preset accuracy threshold, obtain the grid backup capacity.

[0082] Specifically, if It meets the relevant regulations of local power grid operation and does not require additional power adjustment strategies.

[0083] like Inverters or tracking shafts are needed to adjust the power. In this case, the grid reserve capacity P all .

[0084] S23, determining whether the grid backup capacity is greater than the intraday ultra-short-term predicted power; if so, executing step S24; if not, executing step S25.

[0085] Specifically, if the grid reserve capacity P all Greater than the ultra-short-term forecast power P within the dayin (i) indicates that the regional power grid reserve capacity P all If the photovoltaic power station can still receive electricity, it means that the photovoltaic power station can continue to supply electricity to the power grid.

[0086] If so, the grid reserve capacity P all Not greater than the ultra-short-term predicted power P for the day in (i) This indicates that the regional power grid does not have sufficient capacity to receive electricity from the PV power plant.

[0087] S24. Calculate the difference between the grid reserve capacity and the intraday ultra-short-term predicted power, and use it as the over-generation power threshold.

[0088] Specifically, a dynamic over-power threshold R is set, R = P all -P in (i).

[0089] S25. According to the intra-day ultra-short-term predicted power, the day-ahead predicted power and the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method.

[0090] Specifically, the difference between the intra-day ultra-short-term predicted power and the day-ahead predicted power is calculated and used as the over-generation power. If the over-generation power is greater than the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method.

[0091] In practical applications, excess power = P in (i)-P pre (i).

[0092] If the excess power P in (i)-P pre (i)≤R, the tracking axis is tracking normally, and the inverter does not need to adjust the output power limit. in (i) To generate electricity.

[0093] If the excess power P in (i)-P pre (i)>R, there are two control strategies:

[0094] 1) Directly limit the power through the inverter to control the output power according to P in (i) = R output. This step uses the inverter's superb power regulation capability to ensure that the power output value of the power station meets the requirements for maximum output within the deviation range.

[0095] 2) Through the tracking axis to limit power adjustment, according to the power prediction calculation, when it is determined to temporarily stop the tracking rotation of the tracking axis or significantly reduce the rotation frequency of the tracking axis, the output power can also be adjusted according to P in (i) = R output. This step utilizes the power regulation capability of the tracking axis. When the tracking bracket is rotated to a suitable angle, the maximum output can be achieved according to the power output value within the deviation range.

[0096] When the power limit is adjusted by the tracking axis so that the output power is the over-power threshold, the effective irradiance corresponding to the over-power threshold is first determined, which can be obtained by reverse calculation. Then, the tracking angle corresponding to the effective irradiance is determined, and the tracking axis angle is adjusted according to the tracking angle so that the output power is the over-power threshold.

[0097] In practical applications, after obtaining the effective irradiance, the tracking angle needs to be calculated, that is, the inclination angle β of the photovoltaic panel. According to the solved inclination angle β, it is sent to the tracking axis angle controller to adjust the tracking axis angle.

[0098] It should be noted that the premise of using the above method to adjust the angle is that the initial angle in each time period has been obtained through the astronomical algorithm and the tracking axis intelligent tracking algorithm.

[0099] In this embodiment, the two strategies can be preferentially used to perform power limit adjustment according to the power adjustment strategy of the tracking axis, which can greatly improve the service life of the tracking axis while reducing inverter communication instructions.

[0100] S26, performing power limit adjustment through the inverter so that the output power is the day-ahead predicted power.

[0101] Specifically, if the regional power grid does not have sufficient capacity to receive the power of the photovoltaic power station, the output power is adjusted to P through the inverter. pre (i).

[0102] Based on this embodiment, refer to Figure 3 , step S14 may include:

[0103] S31, determine whether the day-ahead predicted power is not greater than the inverter rated power; if so, execute step S32; if not, execute step S35.

[0104] Specifically, if P in (i)>P ac (i) and P pre (i)≤P ac (i), then power limit adjustment is required. in (i)>P ac (i) and Ppre (i)>P ac (i) Since the output power exceeds the maximum output power of the inverter, the final reported power is the maximum output power of the inverter. At this time, it can only be adjusted by adjusting the tracking axis angle to make the output power P ac (i).

[0105] S32: Determine the relationship between the specified multiple of the day-ahead predicted power and the rated power of the inverter.

[0106] Among them, the power grid will be set with a certain redundancy, then the specified multiple can be (1+M), that is, to judge (1+M)P pre (i) and P ac (i) Size.

[0107] S33: If the magnitude relationship is greater than, adjusting the tracking axis angle to adjust the output power to the rated power of the inverter.

[0108] Specifically, if (1+M)P pre (i)>P ac (i) By adjusting the tracking axis angle, the output power of the photovoltaic system is adjusted to P ac (i).

[0109] S34. If the magnitude relationship is not greater than, the output power is adjusted to the rated power of the inverter by adjusting the tracking axis angle, and the output power is adjusted to a specified multiple of the day-ahead predicted power by adjusting the inverter.

[0110] Specifically, if (1+M)P pre (i)≤P ac (i) First, adjust the output power to P by adjusting the tracking axis angle. ac (i) Then the inverter adjusts the power to (1+M)P pre (i).

[0111] S35. Adjust the tracking axis angle to adjust the output power to the rated power of the inverter.

[0112] Specifically, if P in (i)>P ac (i) and P pre (i)>P ac (i) Since the output power exceeds the maximum output power of the inverter, the final reported power is the maximum output power of the inverter. At this time, it can only be adjusted by adjusting the tracking axis angle to make the output power P ac (i).

[0113] Through the embodiment, on the one hand, it is possible to track the sun, make full use of solar energy resources, and generate power to the maximum extent. On the other hand, it can effectively avoid the negative incentives caused by under-generation or over-generation due to the two details. In addition, this embodiment takes into account the scenario where the inverter is overloaded. When the photovoltaic inverter is overloaded or the output power exceeds the power prediction deviation, the photovoltaic output power collaborative adjustment method of the inverter and the tracking axis is used to dynamically adjust the photovoltaic power generation power, thereby maximizing the service life of the inverter and improving the economy, safety, and stability of the system.

[0114] This embodiment can increase the service life of the tracking axis in other scenarios by temporarily stopping the tracking rotation of the tracking axis or reducing the rotation frequency of the tracking axis. In a tracking photovoltaic system, the output power of the photovoltaic array can be controlled by adjusting the tracking angle of the tracking axis, or the output power of the inverter can be controlled and adjusted through communication. In order to achieve the overall optimization of the photovoltaic system power station, a comprehensive analysis should be conducted from multiple angles such as power generation revenue, prediction and negative incentives of operation deviations, and the service life of the tracking axis and inverter equipment, so as to consider the overall optimality and choose to adopt a reasonable power regulation method.

[0115] Optionally, based on the above embodiment of the power regulation method, another embodiment of the present invention provides a power regulation system, including a power regulation controller 101 for executing the above power regulation method.

[0116] Further, refer to Figure 4 , further comprising a tracking axis 102 and an inverter 103;

[0117] The tracking axis 102 and the inverter 103 are used to perform power regulation operations based on the control of the power regulation controller 101 .

[0118] For the specific working process of the power regulation controller 101, the tracking axis 102 and the inverter 103 in this embodiment, please refer to the corresponding description in the above embodiment, which will not be repeated here.

[0119] In this embodiment, photovoltaic power data and inverter rated power are obtained, and the photovoltaic power data includes the day-ahead predicted power and the intraday ultra-short-term predicted power. It is determined whether the intraday ultra-short-term predicted power is less than the inverter rated power. If it is less than, the tracking axis adjustment method or the inverter adjustment method is used to adjust the power based on the prediction accuracy and the grid backup capacity. If it is not less than, based on the relative size relationship between the day-ahead predicted power and the inverter rated power, at least one of the tracking axis adjustment method and the inverter adjustment method is used to adjust the power. That is, in the present invention, at least one of the tracking axis adjustment method and the inverter adjustment method is used to adjust the power, so as to avoid overloading the inverter, thereby increasing the service life of the inverter.

[0120] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power regulation method, characterized in that: include: Acquire photovoltaic power data and inverter rated power, wherein the photovoltaic power data includes day-ahead predicted power and intraday ultra-short-term predicted power; Determining whether the intraday ultra-short-term predicted power is less than the rated power of the inverter; If less than, when the intraday ultra-short-term predicted power is greater than the day-ahead predicted power, the prediction accuracy is calculated based on the day-ahead predicted power and the intraday ultra-short-term predicted power; If the prediction accuracy is greater than a preset accuracy threshold, obtaining the grid backup capacity; In the case where the grid reserve capacity is greater than the intra-day ultra-short-term predicted power, calculating the difference between the grid reserve capacity and the intra-day ultra-short-term predicted power and using it as the over-generation power threshold; According to the intra-day ultra-short-term predicted power, the day-ahead predicted power and the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method, wherein the prediction accuracy is calculated based on the day-ahead predicted power and the intra-day ultra-short-term predicted power; If not, determining whether the day-ahead predicted power is not greater than the inverter rated power; If yes, determining the relationship between the specified multiple of the day-ahead predicted power and the rated power of the inverter; If the magnitude relationship is greater than, adjusting the tracking axis angle to adjust the output power to the rated power of the inverter; If the magnitude relationship is not greater than, the output power is adjusted to the rated power of the inverter by adjusting the tracking axis angle, and the output power is adjusted to a specified multiple of the day-ahead predicted power by adjusting the inverter.

2. The power regulation method according to claim 1, characterized in that: Get photovoltaic power data, including: Get weather data; A short-term power forecasting operation is performed on the meteorological data to obtain a day-ahead predicted power, and an ultra-short-term power forecasting operation is performed on the meteorological data to obtain an intra-day ultra-short-term predicted power.

3. The power regulation method according to claim 1, characterized in that: According to the intra-day ultra-short-term predicted power, the day-ahead predicted power, and the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method, including: Calculate the difference between the intra-day ultra-short-term predicted power and the day-ahead predicted power, and use it as the excess power; If the over-generation power is greater than the over-generation power threshold, power regulation is performed using a tracking axis regulation method or an inverter regulation method.

4. The power regulation method according to claim 3, characterized in that: Power regulation is performed using tracking axis regulation or inverter regulation, including: The inverter is used to perform power limiting adjustment so that the output power is the over-generation power threshold, or the tracking axis is used to perform power limiting adjustment so that the output power is the over-generation power threshold.

5. The power regulation method according to claim 4, characterized in that: The power limiting adjustment is performed by tracking the axis so that the output power is the over-generation power threshold, including: Determining the effective irradiance corresponding to the over-power threshold; A tracking angle corresponding to the effective irradiance is determined, and a tracking axis angle is adjusted according to the tracking angle so that the output power is the over-power threshold.

6. The power regulation method according to claim 1, characterized in that: In the case where the grid reserve capacity is not greater than the intraday ultra-short-term predicted power, the method further includes: The inverter is used to perform power limiting adjustment so that the output power is the day-ahead predicted power.

7. The power regulation method according to claim 1, characterized in that: In the case where the day-ahead predicted power is greater than the inverter rated power, the further comprising: The tracking axis angle is adjusted to adjust the output power to the rated power of the inverter.

8. A power regulation system, characterized in that: It comprises a power regulation controller for executing the power regulation method as described in any one of claims 1-7.

9. The power regulation system according to claim 8, characterized in that: Also included are tracking axes and inverters; The tracking axis and the inverter are used to perform power regulation operations based on the control of the power regulation controller.

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