WO2023109531A1

WO2023109531A1 - Tracking control method and apparatus

Info

Publication number: WO2023109531A1
Application number: PCT/CN2022/136258
Authority: WO
Inventors: 张幼; 薛博伟; 胡琼
Original assignee: 阳光电源（上海）有限公司
Priority date: 2021-12-15
Filing date: 2022-12-02
Publication date: 2023-06-22
Also published as: CN114253302A

Abstract

A tracking control method and apparatus. By constructing a power-radiation model in advance according to historical irradiator data and corresponding inverter power, a real-time total inclined surface radiation amount corresponding to real-time inverter power is calculated on the basis of the power-radiation model; and an optimal tracking angle of a tracking support is determined according to the real-time total inclined surface radiation amount, thereby achieving the calculation and control of the optimal tracking angle while a hardware device does not need to be added.

Description

A tracking control method and device

This application claims the priority of the domestic application submitted to the China Patent Office on December 15, 2021 with the application number 202111535345.3 and the title of the invention "A Tracking Control Method and Device", the entire contents of which are incorporated in this application by reference.

technical field

The present invention relates to the technical field of photovoltaic power generation, and more specifically, to a tracking control method and device.

Background technique

The power generation efficiency of photovoltaic modules is closely related to the angle of solar radiation. When the sun illuminates the photovoltaic modules vertically, the power generation efficiency of photovoltaic modules is the highest. In practical applications, in order to maximize the power generation efficiency of photovoltaic modules, the tracking technology is used to adjust the angle of the tracking bracket so that the photovoltaic modules are at the optimal tracking angle.

At present, the conventional tracking technology mainly senses the change of solar radiation in different directions by installing multiple sensors. Although it can obtain more accurate radiation conditions, it needs to install additional hardware equipment, which will not only increase investment and construction costs, but also exist due to communication between devices. Possibility of instability leading to wrong tracking angles.

Contents of the invention

In view of this, the present invention provides a tracking control method and device, which can realize optimal tracking angle calculation and control without adding hardware equipment.

In order to realize the foregoing invention object, the specific technical scheme provided by the present invention is as follows:

A tracking control method, comprising:

Obtain real-time inverter power;

The real-time inverter power is input into the power-radiation model to obtain the real-time total radiation of the inclined surface, and the power-radiation model is constructed in advance according to the historical irradiator data and the corresponding inverter power;

Determine the optimal tracking angle of the tracking bracket according to the total radiation amount of the real-time inclined surface;

The angle of the control tracking bracket is adjusted to the optimal tracking angle.

Optionally, the method also includes:

Obtain the historical irradiance meter data and the corresponding tracking bracket angle. The historical irradiance meter data includes the horizontal total radiation data, direct radiation data and diffuse radiation data at each historical moment;

Input the historical irradiance meter data and the corresponding tracking bracket angle into the calculation model of the radiation amount on the inclined surface, and obtain the total radiation amount on the inclined surface at the corresponding tracking bracket angle at each historical moment;

Obtain the inverter power at each historical moment;

According to the preset method, according to the total radiation amount of the inclined surface and the inverter power at the corresponding tracking bracket angle at each historical moment, the power representing the conversion relationship between the total radiation amount of the inclined surface and the inverter power is constructed- radiation model.

Optionally, according to the preset method, according to the total radiation of the inclined surface and the power of the inverter at the corresponding tracking support angle at each historical moment, the conversion between the total radiation of the inclined surface and the inverter power is constructed The power-radiation model of the relationship includes:

Divide each historical moment into different seasonal historical moments;

According to the preset method, the power-radiation model corresponding to each season is constructed according to the total radiation amount of the inclined surface and the power of the inverter at the corresponding tracking support angle at each historical moment of each season.

Optionally, the real-time inverter power is input into the power-radiation model to obtain the real-time total radiation of the inclined surface, including:

Determine the season at the current moment;

The real-time inverter power is input to the power-radiation model corresponding to the season at the current moment to obtain the real-time total radiation amount of the inclined surface.

Optionally, determining the optimal tracking angle of the tracking bracket according to the real-time total radiation amount of the inclined surface includes:

Converting the real-time total radiation amount of the inclined surface into real-time horizontal radiation data, and obtaining short-term horizontal radiation data, the short-term horizontal radiation data is horizontal radiation data within a preset time period before the current moment, and the preset time period is Set according to the default smoothing algorithm;

smoothing the real-time horizontal radiation data according to the short-term horizontal radiation data by using a preset smoothing algorithm to obtain smoothed real-time horizontal radiation data;

According to the smoothed real-time horizontal radiation data, the optimal tracking angle of the tracking bracket is determined.

Optionally, the determining the optimal tracking angle of the tracking bracket according to the smoothed real-time horizontal radiation data includes:

Input the smoothed real-time horizontal radiation data into the inclined surface radiation calculation model to obtain the theoretical total radiation corresponding to each inclination of the tracking bracket within the preset angle range;

The optimal tracking angle is determined according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within a preset angle range.

Optionally, determining the optimal tracking angle according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range includes:

Determine the tracking bracket angle corresponding to the maximum theoretical total radiation amount from the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range;

Determine whether the tracking bracket angle corresponding to the maximum theoretical total radiation will cause occlusion between component arrays;

If it will not cause occlusion between component arrays, the tracking bracket angle corresponding to the maximum theoretical total radiation amount is determined as the optimal tracking angle;

If it will cause occlusion between component arrays, calculate the critical angle for shadow generation;

The critical angle is determined as the optimal tracking angle.

A tracking control device, comprising:

A real-time inverter power acquisition unit, configured to acquire real-time inverter power;

The power radiation conversion unit is used to input the real-time inverter power into the power-radiation model to obtain the real-time total radiation of the inclined surface. The power-radiation model is based on the historical irradiance meter data and the corresponding inverter power built;

An optimal tracking angle determination unit, configured to determine the optimal tracking angle of the tracking bracket according to the total radiation amount of the real-time inclined surface;

The tracking control unit is used to control the adjustment of the angle of the tracking support to the optimal tracking angle.

Optionally, the device also includes:

The historical irradiance meter data acquisition unit is used to acquire the historical irradiance meter data and the corresponding tracking bracket angle, the historical irradiance meter data includes horizontal total radiation data, direct radiation data and diffuse radiation data at each historical moment;

The total radiation amount calculation unit on the inclined surface is used to input the historical irradiance meter data and the corresponding tracking bracket angle into the radiation amount calculation model on the inclined surface, so as to obtain the total radiation amount on the inclined surface at the corresponding tracking bracket angle at each historical moment;

A historical inverter power acquisition unit, configured to acquire inverter power at each historical moment;

The power-radiation model construction unit is used to construct and represent the total radiation amount of the inclined surface and the inverter power according to the total radiation amount of the inclined surface and the inverter power at the corresponding tracking support angle at each historical moment according to the preset method. The power-radiation model of the conversion relationship between.

Optionally, the power-radiation model construction unit is specifically used for:

Divide each historical moment into different seasonal historical moments;

Optionally, the power radiation conversion unit is specifically used for:

Determine the season at the current moment;

Optionally, the optimal tracking angle determination unit includes:

A radiation data conversion subunit, configured to convert the real-time total radiation of the inclined surface into real-time horizontal radiation data;

The short-term horizontal radiation data acquisition subunit is used to acquire short-term horizontal radiation data, the short-term horizontal radiation data is the horizontal radiation data in the preset time period before the current moment, and the preset time period is set according to the preset smoothing algorithm of;

A smoothing processing subunit, configured to use a preset smoothing algorithm to smooth the real-time horizontal radiation data according to the short-term horizontal radiation data, to obtain smoothed real-time horizontal radiation data;

The optimal tracking angle determining subunit is used to determine the optimal tracking angle of the tracking bracket according to the smoothed real-time horizontal radiation data.

Optionally, the optimal tracking angle determining subunit is specifically used for:

The critical angle is determined as the optimal tracking angle.

In this embodiment, the power-radiation model is constructed in advance based on the historical irradiance meter data and the corresponding inverter power, and the real-time total radiation of the inclined surface corresponding to the real-time inverter power is calculated based on the power-radiation model. According to the real-time The total radiation of the inclined surface determines the optimal tracking angle of the tracking bracket, so that the calculation and control of the optimal tracking angle can be realized without adding hardware equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic flow diagram of a tracking control method disclosed in an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a partial method of a tracking control method disclosed in an embodiment of the present invention;

Fig. 3 is a schematic diagram of a power-radiation fitting disclosed in an embodiment of the present invention;

Fig. 4 is a schematic flowchart of a partial method of a tracking control method disclosed in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a tracking control device disclosed in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The present invention provides a tracking control method and device. By constructing a power-radiation model in advance based on historical irradiance meter data and corresponding inverter power, the real-time inclination corresponding to real-time inverter power can be calculated based on the power-radiation model. The total radiation amount of the surface, so that the optimal tracking angle of the tracking bracket can be determined according to the real-time total radiation amount of the inclined surface without adding hardware equipment.

Specifically, referring to FIG. 1, a tracking control method disclosed in this embodiment includes the following steps:

S101: Obtain real-time inverter power;

Obtain real-time inverter current and voltage, and calculate real-time inverter power based on inverter current and voltage.

S102: Input the real-time inverter power into the power-radiation model to obtain the real-time total radiation of the inclined surface. The power-radiation model is constructed in advance based on the historical irradiator data and the corresponding inverter power;

According to the requirements of the State Grid, each grid-connected photovoltaic power station must be installed with an irradiator. In this embodiment, a power-radiation model is constructed based on the historical irradiator data and the corresponding inverter power, so that the real-time inverter can be calculated based on the power-radiation model. The real-time total radiation of the inclined surface corresponding to the power of the detector does not need to add any hardware devices.

The power-radiation model represents the corresponding relationship between the inverter power and the total radiation of the inclined surface, and the real-time total radiation of the inclined surface can be obtained by inputting the real-time inverter power into the power-radiation model.

Referring to Fig. 2, this embodiment discloses a method for constructing a power-radiation model, which specifically includes the following steps:

S201: Obtain historical irradiance meter data and corresponding tracking bracket angles, the historical irradiance meter data includes horizontal total radiation data, direct radiation data and diffuse radiation data at each historical moment;

The tracking bracket angle is acquired by the bracket controller installed on the tracking axis.

If the direct radiation data or diffuse radiation data in the historical irradiance data is missing or the data quality is not good, input the horizontal total radiation data (GHI) at the same historical moment into the radiation decomposition model, such as the Perez model, etc., to obtain the direct radiation data (DNI ) and diffuse radiation data (DHI).

Furthermore, if the historical data of the radiometer of the power station cannot be obtained, the irradiation data of nearby national weather stations or the radiation data of high-quality meteorological satellites can be used instead.

S202: Input the historical irradiance meter data and the corresponding tracking bracket angle into the calculation model of the radiation amount on the inclined surface, and obtain the total radiation amount on the inclined surface under the corresponding tracking bracket angle at each historical moment;

Wherein, the radiation dose calculation model of the inclined surface may be any existing calculation model, which is not specifically limited in the present invention.

S203: Obtain the inverter power at each historical moment;

The inverter power can be calculated according to the inverter current and voltage at each historical moment.

S204: According to the preset method, according to the total radiation amount of the inclined surface and the inverter power at the corresponding tracking support angle at each historical moment, construct the power representing the conversion relationship between the total radiation amount of the inclined surface and the inverter power - radiation model.

The preset method can be a linear fitting method, or use other machine learning methods such as random forest, KNN (k-NearestNeighbor, k-nearest neighbor classification algorithm) in combination with parameters such as temperature, solar azimuth, and altitude angle, and the present invention does not specifically limit it .

Taking the linear fitting method as an example, by linearly fitting the total radiation of the inclined surface and the inverter power at the corresponding tracking bracket angle at each historical moment, the relationship between the inverter power and the total radiation of the inclined surface is obtained. The power-radiation model of the correspondence between. Fig. 3 is a schematic diagram of power-radiation fitting with a fitting result of y=0.1289x, y is the total radiation amount of the inclined surface, and x is the power of the inverter.

Since the success rate of irradiation conversion is significantly affected by temperature, in the case of sufficient historical data, such as the historical data reaches the length of one year, the historical data can be divided into different seasons, and the power-radiation corresponding to different seasons can be constructed respectively. When applying the model, first determine the season at the current time, and then input the real-time inverter power into the power-radiation model corresponding to the season at the current time to obtain the real-time total radiation of the inclined surface.

Furthermore, the historical data can also be divided into different temperature interval historical data, and the power-radiation models corresponding to different temperature intervals are respectively constructed. When applying, the temperature at the current moment is first determined, and then the real-time inverter power is input to the current moment. The power-radiation model corresponding to the temperature range of the temperature is used to obtain the real-time total radiation of the inclined surface.

S103: Determine the optimal tracking angle of the tracking bracket according to the real-time total radiation amount of the inclined surface;

One of the optional methods to determine the optimal tracking angle of the tracking bracket is: input the real-time total radiation of the inclined surface into the inclination-horizontal radiation conversion model to obtain real-time horizontal radiation data, and then input the time-horizontal radiation data into the inclined surface radiation Calculate the model to obtain the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range, and finally determine the optimal tracking angle according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range.

In addition, in order to more accurately obtain the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range when the radiation fluctuation is not obvious or the radiation changes sharply, this embodiment also provides a smoothing-based determination The method of tracking the optimal tracking angle of the support, after converting the real-time total radiation of the inclined surface into real-time horizontal radiation data, and obtaining the short-term horizontal radiation data, using the preset smoothing algorithm to process the real-time horizontal radiation data according to the short-term horizontal radiation data Smoothing processing, so as to determine the optimal tracking angle of the tracking bracket according to the real-time horizontal radiation data after smoothing processing, wherein the short-term horizontal radiation data is the horizontal radiation data in the preset time period before the current moment, and the preset time period is based on Default smoothing algorithm set.

Referring to FIG. 4, an optional smoothing-based method for determining the optimal tracking angle of the tracking bracket disclosed in this embodiment specifically includes the following steps:

S301: Obtain the short-term total radiation of the inclined surface, the short-term total radiation of the inclined surface is the total radiation of the inclined surface in a preset time period before the current moment, and the preset time period is set according to a preset smoothing algorithm;

It can be understood that the length of time required by different smoothing algorithms is different. In this embodiment, the time range corresponding to the short-term total radiation on the inclined surface is set according to the subsequent smoothing algorithm, for example, it can be set to 30 minutes before the current time.

Specifically, first obtain the inverter power in the preset time period before the current moment, that is, the short-term inverter power, and then input the short-term inverter power into the power-radiation model to obtain the total radiation amount of the short-term inclined surface.

S302: Input the real-time total radiation amount of the inclined surface and the short-term total radiation amount of the inclined surface into the inclination-horizontal radiation conversion model respectively to obtain real-time horizontal radiation data and short-term horizontal radiation data;

The inclination-horizontal radiation conversion model may be a GTI_DIRINT model, etc., which is not specifically limited in the present invention.

Specifically, the real-time total radiation of the inclined surface and the short-term total radiation of the inclined surface are respectively input into the conversion model of the inclination-horizontal radiation. Obtain the horizontal total radiation data (GHI), direct radiation data (DNI) and diffuse radiation data (DHI) in the real-time horizontal radiation data, as well as the horizontal total radiation data (GHI), direct radiation data (DNI) in the short-term horizontal radiation data and Diffuse Radiation Data (DHI).

S303: Using a preset smoothing algorithm, smoothing the real-time horizontal radiation data according to the short-term horizontal radiation data, to obtain smoothed real-time horizontal radiation data;

The preset smoothing algorithm can be fractal adaptive moving average, Hull moving average and other moving average methods. Overall, the smoothed real-time horizontal radiation data can be obtained as follows:

Among them, EMA _t represents the exponential moving average at time t, α represents the attenuation degree of the weight, and the value is between 0 and 1. The larger α is, the faster the past observations decay. The value of α can be determined by the preset smoothing algorithm set up.

S304: Input the smoothed real-time horizontal radiation data into the inclined surface radiation calculation model to obtain the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range;

Specifically, the horizontal total radiation data (GHI), direct radiation data (DNI) and diffuse radiation data (DHI) in the smoothed real-time horizontal radiation data are input into the slope radiation calculation model, and exhaustively obtain the tracking bracket in the preset The theoretical total radiation amount corresponding to each inclination angle within the angle range (such as plus or minus 45 degrees).

S305: Determine the optimal tracking angle according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range.

Specifically, the angle of the tracking bracket corresponding to the maximum theoretical total radiation is determined from the theoretical total radiation corresponding to each inclination of the tracking bracket within the preset angle range, and then, according to parameters such as component width and array spacing, and sun trajectory parameters, judge Whether the tracking bracket angle corresponding to the maximum theoretical total radiation will cause occlusion between component arrays, if it will not cause occlusion between component arrays, determine the tracking bracket angle corresponding to the maximum theoretical total radiation as the optimal tracking angle, if it will cause component arrays Inter-occlusion, calculate the critical angle for shadow generation, and determine the critical angle as the optimal tracking angle. It is further ensured that the final optimal tracking angle is the global optimum.

By smoothing the real-time horizontal radiation data and then calculating the optimal tracking angle, it is smooth enough when the radiation fluctuation is not obvious, and can be quickly captured when the radiation changes sharply, and the lag is minimized, so that the tracking angle is optimized. It ensures that the optimal tracking angle is relatively smooth, without frequent fluctuations, which will damage the life of the bracket and the motor. It also ensures that it can track quickly when the weather conditions change rapidly, and reduces the loss of power generation caused by excessive smoothing.

S104: controlling the angle of the tracking bracket to be adjusted to an optimal tracking angle.

It can be seen that a tracking control method disclosed in this embodiment constructs a power-radiation model based on the historical irradiator data and the corresponding inverter power in advance, and realizes the calculation of the real-time corresponding to the real-time inverter power based on the power-radiation model. The total radiation of the inclined surface can track the real-time radiation intensity without installing new hardware equipment or communication equipment, which effectively reduces the construction cost and the stability of communication. At the same time, the smoothing method is used to smooth the real-time horizontal radiation data. Then calculate the optimal tracking angle, which is smooth enough when the irradiance fluctuation is not obvious, and can be quickly captured when the irradiance changes sharply, and the lag is minimized, thereby optimizing the tracking angle, which ensures that the tracking angle is relatively smooth and does not occur Frequent fluctuations will reduce the life of the bracket and the motor, and ensure rapid tracking when the weather conditions change rapidly, reducing the loss of power generation caused by excessive smoothing.

Based on the tracking control method disclosed in the above embodiment, this embodiment discloses a tracking control device correspondingly, please refer to Figure 5, the device includes:

A real-time inverter power acquisition unit 401, configured to acquire real-time inverter power;

The power radiation conversion unit 402 is used to input the real-time inverter power into the power-radiation model to obtain the real-time total radiation of the inclined surface. The power-radiation model is based on the historical irradiance meter data and the corresponding inverter built of power;

An optimal tracking angle determination unit 403, configured to determine the optimal tracking angle of the tracking bracket according to the total radiation amount of the real-time inclined surface;

The tracking control unit 404 is configured to control the adjustment of the angle of the tracking support to the optimal tracking angle.

Optionally, the device also includes:

Divide each historical moment into different seasonal historical moments;

Optionally, the power radiation conversion unit is specifically used for:

Determine the season at the current moment;

Optionally, the optimal tracking angle determining unit 403 includes:

The optimal tracking angle determination subunit is used to determine the optimal tracking angle of the tracking bracket according to the smoothed real-time horizontal radiation data.

The critical angle is determined as the optimal tracking angle.

A tracking control device disclosed in this embodiment, by constructing a power-radiation model in advance based on the historical irradiance meter data and the corresponding inverter power, realizes the calculation of the real-time inclined plane corresponding to the real-time inverter power based on the power-radiation model The total radiation amount can track the real-time radiation intensity without installing new hardware equipment or communication equipment, which effectively reduces the construction cost and the stability of communication. The optimal tracking angle is smooth enough when the irradiance fluctuation is not obvious, and can be quickly captured when the irradiance changes sharply, and the lag is minimized, so that the tracking angle is optimized, which not only ensures that the tracking angle is relatively smooth, but does not occur frequently Fluctuation, loss of support and motor life, and ensures rapid tracking when weather conditions change rapidly, reducing power loss caused by excessive smoothing.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for relevant details, please refer to the description of the method part.

It should also be noted that in this article, relational terms such as first and second etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The above-mentioned embodiments can be combined arbitrarily. For the above description of the disclosed embodiments, the features recorded in each embodiment in this specification can be replaced or combined with each other, so that those skilled in the art can implement or use the present application.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A tracking control method, characterized in that, comprising:

Obtain real-time inverter power;

The real-time inverter power is input into the power-radiation model to obtain the real-time total radiation of the inclined surface, and the power-radiation model is constructed in advance according to the historical irradiator data and the corresponding inverter power;

Determine the optimal tracking angle of the tracking bracket according to the total radiation amount of the real-time inclined surface;

The angle of the control tracking bracket is adjusted to the optimal tracking angle.
The method according to claim 1, further comprising:

Obtain the historical irradiance meter data and the corresponding tracking bracket angle. The historical irradiance meter data includes the horizontal total radiation data, direct radiation data and diffuse radiation data at each historical moment;

Input the historical irradiance meter data and the corresponding tracking bracket angle into the calculation model of the radiation amount on the inclined surface, and obtain the total radiation amount on the inclined surface at the corresponding tracking bracket angle at each historical moment;

Obtain the inverter power at each historical moment;

According to the preset method, according to the total radiation amount of the inclined surface and the inverter power at the corresponding tracking bracket angle at each historical moment, the power representing the conversion relationship between the total radiation amount of the inclined surface and the inverter power is constructed- radiation model.
The method according to claim 2, characterized in that, according to the preset method, according to the total radiation amount of the sloped surface and the power of the inverter at the corresponding tracking bracket angle at each historical moment, the construction representing the total radiation of the sloped surface is constructed. The power-radiation model of the conversion relationship between the quantity and the inverter power includes:

Divide each historical moment into different seasonal historical moments;

According to the preset method, the power-radiation model corresponding to each season is constructed according to the total radiation amount of the inclined surface and the power of the inverter at the corresponding tracking support angle at each historical moment of each season.
The method according to claim 3, wherein the real-time inverter power is input into a power-radiation model to obtain a real-time total radiation amount of an inclined surface, comprising:

Determine the season at the current moment;

The real-time inverter power is input to the power-radiation model corresponding to the season at the current moment to obtain the real-time total radiation amount of the inclined surface.
The method according to claim 1, wherein, determining the optimal tracking angle of the tracking support according to the real-time inclined surface total radiation, comprises:

Converting the real-time total radiation amount of the inclined surface into real-time horizontal radiation data, and obtaining short-term horizontal radiation data, the short-term horizontal radiation data is horizontal radiation data within a preset time period before the current moment, and the preset time period is Set according to the default smoothing algorithm;

smoothing the real-time horizontal radiation data according to the short-term horizontal radiation data by using a preset smoothing algorithm to obtain smoothed real-time horizontal radiation data;

According to the smoothed real-time horizontal radiation data, the optimal tracking angle of the tracking bracket is determined.
The method according to claim 5, wherein said determining the optimal tracking angle of the tracking bracket according to the smoothed real-time horizontal radiation data includes:

Input the smoothed real-time horizontal radiation data into the inclined surface radiation calculation model to obtain the theoretical total radiation corresponding to each inclination of the tracking bracket within the preset angle range;

The optimal tracking angle is determined according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within a preset angle range.
The method according to claim 6, wherein the determination of the optimal tracking angle according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range includes:

Determine the tracking bracket angle corresponding to the maximum theoretical total radiation amount from the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range;

Determine whether the tracking bracket angle corresponding to the maximum theoretical total radiation will cause occlusion between component arrays;

If it will not cause occlusion between component arrays, the tracking bracket angle corresponding to the maximum theoretical total radiation amount is determined as the optimal tracking angle;

If it will cause occlusion between component arrays, calculate the critical angle for shadow generation;

The critical angle is determined as the optimal tracking angle.
A tracking control device, characterized in that it comprises:

A real-time inverter power acquisition unit, configured to acquire real-time inverter power;

The power radiation conversion unit is used to input the real-time inverter power into the power-radiation model to obtain the real-time total radiation of the inclined surface. The power-radiation model is based on the historical irradiance meter data and the corresponding inverter power built;

An optimal tracking angle determination unit, configured to determine the optimal tracking angle of the tracking bracket according to the total radiation amount of the real-time inclined surface;

The tracking control unit is used to control the adjustment of the angle of the tracking support to the optimal tracking angle.
The device according to claim 8, wherein the device further comprises:

The historical irradiance meter data acquisition unit is used to acquire the historical irradiance meter data and the corresponding tracking bracket angle, the historical irradiance meter data includes horizontal total radiation data, direct radiation data and diffuse radiation data at each historical moment;

The total radiation amount calculation unit on the inclined surface is used to input the historical irradiance meter data and the corresponding tracking bracket angle into the radiation amount calculation model on the inclined surface, so as to obtain the total radiation amount on the inclined surface at the corresponding tracking bracket angle at each historical moment;

A historical inverter power acquisition unit, configured to acquire inverter power at each historical moment;

The power-radiation model construction unit is used to construct and represent the total radiation amount of the inclined surface and the inverter power according to the total radiation amount of the inclined surface and the inverter power at the corresponding tracking support angle at each historical moment according to the preset method. The power-radiation model of the conversion relationship between.
The device according to claim 9, wherein the power-radiation model construction unit is specifically used for:

Divide each historical moment into different seasonal historical moments;

According to the preset method, the power-radiation model corresponding to each season is constructed according to the total radiation amount of the inclined surface and the power of the inverter at the corresponding tracking support angle at each historical moment of each season.
The device according to claim 10, wherein the power radiation conversion unit is specifically used for:

Determine the season at the current moment;

The real-time inverter power is input to the power-radiation model corresponding to the season at the current moment to obtain the real-time total radiation amount of the inclined surface.
The device according to claim 8, wherein the optimal tracking angle determination unit comprises:

A radiation data conversion subunit, configured to convert the real-time total radiation of the inclined surface into real-time horizontal radiation data;

The short-term horizontal radiation data acquisition subunit is used to acquire short-term horizontal radiation data, the short-term horizontal radiation data is the horizontal radiation data in the preset time period before the current moment, and the preset time period is set according to the preset smoothing algorithm of;

A smoothing processing subunit, configured to use a preset smoothing algorithm to smooth the real-time horizontal radiation data according to the short-term horizontal radiation data, to obtain smoothed real-time horizontal radiation data;

The optimal tracking angle determination subunit is used to determine the optimal tracking angle of the tracking bracket according to the smoothed real-time horizontal radiation data.
The device according to claim 12, wherein the optimal tracking angle determining subunit is specifically used for:

Input the smoothed real-time horizontal radiation data into the inclined surface radiation calculation model to obtain the theoretical total radiation corresponding to each inclination of the tracking bracket within the preset angle range;

The optimal tracking angle is determined according to the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within a preset angle range.
The device according to claim 12, wherein the optimal tracking angle determining subunit is specifically used for:

Input the smoothed real-time horizontal radiation data into the inclined surface radiation calculation model to obtain the theoretical total radiation corresponding to each inclination of the tracking bracket within the preset angle range;

Determine the tracking bracket angle corresponding to the maximum theoretical total radiation amount from the theoretical total radiation amount corresponding to each inclination angle of the tracking bracket within the preset angle range;

Determine whether the tracking bracket angle corresponding to the maximum theoretical total radiation will cause occlusion between component arrays;

If it will not cause occlusion between component arrays, the tracking bracket angle corresponding to the maximum theoretical total radiation amount is determined as the optimal tracking angle;

If it will cause occlusion between component arrays, calculate the critical angle for shadow generation;

The critical angle is determined as the optimal tracking angle.