CN110297506B - Tracking method, device and equipment for double-sided single-shaft assembly photovoltaic system - Google Patents
Tracking method, device and equipment for double-sided single-shaft assembly photovoltaic system Download PDFInfo
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Abstract
The invention provides a tracking method, a device and equipment of a double-sided single-shaft assembly photovoltaic system, wherein the method comprises the following steps: determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; adjusting the north-south direction inclination angle of the double-sided single-shaft component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value; determining an irradiation value corresponding to each time within a preset time range corresponding to the current time according to a preset irradiation function; and adjusting the east-west tracking angle of the double-sided single-shaft component to be the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times. The invention can greatly improve the power generation efficiency of the double-sided single-shaft assembly photovoltaic system and reduce the power generation cost of the double-sided single-shaft assembly photovoltaic system.
Description
Technical Field
The invention relates to the technical field of solar energy, in particular to a tracking method of a double-sided single-axis component photovoltaic system, a tracking device of the double-sided single-axis component photovoltaic system, tracking equipment of the double-sided single-axis component photovoltaic system and a computer readable storage medium.
Background
With the progress of the photovoltaic industry into the flat era, it is more and more important to improve the power generation efficiency of the photovoltaic system and reduce the power generation cost of the photovoltaic system.
The conventional photovoltaic system adopts a traditional astronomical tracking algorithm to calculate a solar altitude angle and a solar azimuth angle based on a view-sun movement track, and controls a solar tracker in the photovoltaic system according to the solar altitude angle and the solar azimuth angle, so that a light receiving surface of a photovoltaic component in the photovoltaic system is always perpendicular to direct sunlight.
However, for the photovoltaic system with the bifacial module, since the back of the bifacial module can also generate power after being radiated by the solar energy, if the photovoltaic system with the bifacial module still adopts the traditional astronomical tracking algorithm, the photovoltaic system with the bifacial module cannot always obtain the maximum power generation efficiency, so that the power generation efficiency of the photovoltaic system with the bifacial module is lower, and the power generation cost is higher.
Disclosure of Invention
In view of the foregoing problems, an object of the embodiments of the present invention is to provide a tracking method for a double-sided single-axis module photovoltaic system, a tracking device for a double-sided single-axis module photovoltaic system, a tracking apparatus for a double-sided single-axis module photovoltaic system, and a computer-readable storage medium, so as to solve the problems of low power generation efficiency and high power generation cost caused by the adoption of a conventional astronomical tracking algorithm in a photovoltaic system with double-sided modules.
In order to solve the above problems, an embodiment of the present invention discloses a tracking method for a double-sided single-axis module photovoltaic system, including:
determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south inclination angle, solar irradiation amount, ground reflectivity and an irradiation value;
adjusting the north-south direction inclination angle of the double-sided single-shaft component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
determining an irradiation value corresponding to each time within a preset time range corresponding to the current time according to the preset irradiation function;
and adjusting the east-west tracking angle of the double-sided single-shaft component to be the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Optionally, the determining, according to a preset irradiation function, a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length includes:
determining the preset north-south direction inclination angle range according to the latitude of the area where the double-sided single-shaft assembly photovoltaic system is located, wherein the preset north-south direction inclination angle range comprises the latitude of the area where the double-sided single-shaft assembly photovoltaic system is located;
equally dividing the first preset time length into a first preset number of time points;
calculating an irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the north-south inclination angle.
Optionally, the determining, according to the preset irradiation function, an irradiation value corresponding to each time within a preset time range corresponding to the current time includes:
equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
and calculating an irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function.
Optionally, the adjusting the east-west tracking angle of the double-sided single-axis module to the solar azimuth angle of the time corresponding to the maximum irradiance value among the irradiance values corresponding to the respective times includes:
determining the maximum irradiation value in the irradiation values of the second preset number of time points;
determining the solar azimuth angle of the time point corresponding to the maximum irradiation value;
and adjusting the east-west tracking angle of the double-sided single-axis component to be the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Optionally, the formula of the preset irradiation function is as follows:
wherein H is the irradiation value, H b Is the direct dose of the solar dose, H d Is the sunThe amount of scattered radiation in the irradiation dose,
the latitude of the area where the double-sided single-axis component photovoltaic system is located is beta, the south-north direction inclination angle is beta, the solar declination angle is sigma, the solar hour angle is omega, and the rho is the ground reflectivity.
In order to solve the above problem, an embodiment of the present invention further discloses a tracking device for a double-sided single-axis module photovoltaic system, including:
the first irradiation value determining module is used for determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and an irradiation value;
the first angle adjusting module is used for adjusting the north-south direction inclination angle of the double-sided single-axis component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
the second irradiation value determining module is used for determining irradiation values corresponding to all times in a preset time range corresponding to the current time according to the preset irradiation function;
and the second angle adjusting module is used for adjusting the east-west tracking angle of the double-sided single-shaft assembly into the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Optionally, the first exposure value determining module includes:
the inclination angle range determining submodule is used for determining the preset north-south inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, and the preset north-south inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located;
the first time distribution submodule is used for equally dividing the first preset time length into a first preset number of time points;
the first irradiation value operator module is used for calculating the irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
and the irradiation value accumulation submodule is used for accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the inclination angle in the north-south direction.
Optionally, the second irradiation value determination module includes:
the second time distribution submodule is used for equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
and the second irradiation value operator module is used for calculating the irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function.
In order to solve the above problem, an embodiment of the present invention further discloses a tracking device for a double-sided single-axis module photovoltaic system, including: the tracking method comprises an interface, a bus, a memory and a processor, wherein the interface, the memory and the processor are connected through the bus, the memory is used for storing an executable program, and the processor is configured to run the executable program to realize the steps of the tracking method of the double-sided single-shaft assembly photovoltaic system.
In order to solve the above problem, an embodiment of the present invention further discloses a computer-readable storage medium, where an executable program is stored on the computer-readable storage medium, and the executable program is executed by a processor to implement the steps of the tracking method for the double-sided single-axis module photovoltaic system.
The embodiment of the invention has the following advantages: after a total irradiation value corresponding to each north-south direction inclination angle within a preset south-north direction inclination angle range within a first preset time length is determined according to a preset irradiation function, the south-north direction inclination angle of the double-sided single-shaft component is adjusted to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to each north-south direction inclination angle, the south-north direction inclination angle in the preset irradiation function is set to a south-north direction inclination angle corresponding to the maximum total irradiation value, and after an irradiation value corresponding to each time within a preset time range corresponding to the current time is determined according to the preset irradiation function, the east-west tracking angle of the double-sided single-shaft component is adjusted to a solar azimuth angle corresponding to the maximum irradiation value in the irradiation values corresponding to each time, wherein the preset irradiation function is a function among time, the south-north direction inclination angle, the solar irradiation amount, the ground reflectivity and the irradiation value. According to the embodiment of the invention, the north-south direction inclination angle and the east-west direction tracking angle of the double-sided single-axis component are determined based on the solar irradiation amount and the ground reflectivity, the total irradiation value of the double-sided single-axis component photovoltaic system in a first preset time length is the largest due to the north-south direction inclination angle of the double-sided single-axis component, and the total irradiation value of the double-sided single-axis component photovoltaic system in the current time is the largest due to the east-west direction tracking angle of the double-sided single-axis component, so that the front side and the back side of the double-sided single-axis component can receive solar radiation with the maximum efficiency, the power generation efficiency of the double-sided single-axis component photovoltaic system is greatly improved, and the power generation cost of the double-sided single-axis component photovoltaic system is reduced.
Drawings
FIG. 1 is a flow chart of the steps of an embodiment of a method of tracking a bifacial, single-axis module photovoltaic system of the present invention;
FIG. 2 is a table of the relationship between ground reflectivity and surface condition;
FIG. 3 is a flow chart of steps of another embodiment of a method of tracking a bifacial, single-axis module photovoltaic system of the present invention;
FIG. 4 is a block diagram of an embodiment of a tracking device for a bifacial, single-axis module photovoltaic system of the present invention;
FIG. 5 is a block diagram of another embodiment of a tracking device for a bifacial, single-axis module photovoltaic system of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of a tracking device of a bifacial, single-axis module photovoltaic system of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, which shows a flowchart of steps of an embodiment of a tracking method of a bifacial, single-axis module photovoltaic system of the present invention, the bifacial, single-axis module photovoltaic system includes a bifacial, single-axis module (including a bifacial module and a single-axis tracker), and the tracking method may specifically include the following steps:
s10, determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and irradiation value.
The solar irradiation amount can be an average solar irradiation amount of a preset time length, such as 2 years or 5 years or 10 years, on a horizontal plane of an area where the double-sided single-axis module photovoltaic system is located, and can be obtained through an irradiator, historical data of the solar irradiation amount obtained from a regional meteorological department where the double-sided single-axis module photovoltaic system is located, or can be obtained through other ways.
Specifically, the ground reflectivity may be obtained by querying a relation table between the ground reflectivity and the ground surface state according to the ground surface state of the area where the double-sided single-axis module photovoltaic system is located, where the relation table between the ground reflectivity and the ground surface state may be as shown in fig. 2.
Specifically, the first preset time length may be greater than or equal to a time length of a real sun in a day in an area where the double-sided single-shaft assembly photovoltaic system is located.
Specifically, the north-south inclination angles within the predetermined north-south inclination angle range may be spaced apart from each other by a predetermined angle (e.g., 1 degree or 2 degrees or other angles).
Specifically, the total irradiation value corresponding to each north-south inclination angle in the first preset time length is the total irradiation value corresponding to each north-south inclination angle in the first preset time length.
S20, adjusting the north-south direction inclination angle of the double-sided single-axis component to the north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value.
Specifically, step S20 may adopt the prior art to adjust the north-south tilt angle of the double-sided single-axis module.
After the north-south inclination angle in the preset irradiation function is set as the north-south inclination angle corresponding to the maximum total irradiation value in step S20, the north-south inclination angle in the preset irradiation function is a constant.
And S30, determining the irradiation value corresponding to each time within the preset time range corresponding to the current time according to the preset irradiation function.
Specifically, the minimum time in the preset time range corresponding to the current time may be the current time minus a second preset time length (e.g., 3 minutes or 4 minutes or 5 minutes or other time lengths), and the maximum time in the preset time range corresponding to the current time may be the current time plus the second preset time length.
In particular, the times within the preset time range may be spaced apart from each other by a third preset length of time (e.g., 1 minute or 2 minutes).
And S40, adjusting the east-west tracking angle of the double-sided single-axis component to be the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Specifically, step S40 may determine the solar azimuth angle at the time corresponding to the maximum irradiance value by using an astronomical algorithm.
Specifically, step S40 may employ the prior art technique to adjust the east-west tracking angle of the double-sided single-axis assembly.
The first embodiment of the invention has the following advantages: after a total irradiation value corresponding to each north-south direction inclination angle within a preset south-north direction inclination angle range within a first preset time length is determined according to a preset irradiation function, the south-north direction inclination angle of the double-sided single-shaft component is adjusted to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to each north-south direction inclination angle, the south-north direction inclination angle in the preset irradiation function is set to a south-north direction inclination angle corresponding to the maximum total irradiation value, and after an irradiation value corresponding to each time within a preset time range corresponding to the current time is determined according to the preset irradiation function, the east-west tracking angle of the double-sided single-shaft component is adjusted to a solar azimuth angle corresponding to the maximum irradiation value in the irradiation values corresponding to each time, wherein the preset irradiation function is a function among time, the south-north direction inclination angle, the solar irradiation amount, the ground reflectivity and the irradiation value. According to the embodiment of the invention, the north-south inclination angle and the east-west tracking angle of the double-sided single-axis component are determined based on the solar irradiation amount and the ground reflectivity, the north-south inclination angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum within a first preset time length, and the east-west tracking angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum at the current time.
Example two
Referring to fig. 3, which shows a flowchart of steps of another embodiment of a tracking method for a bifacial single-axis module photovoltaic system according to the present invention, specifically, the method may include the following steps:
s310, determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and irradiation value.
Optionally, in an embodiment of the present invention, the determining, in step S310, a total irradiation value corresponding to each north-south direction inclination angle within the preset north-south direction inclination angle range within the first preset time length according to the preset irradiation function may include the following steps:
s311, determining a preset north-south direction inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, wherein the preset north-south direction inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located.
Specifically, in step S311, the minimum north-south inclination angle in the predetermined north-south inclination angle range may be the latitude of the area where the double-sided single-axis module photovoltaic system is located minus a predetermined angle (for example, 10 degrees or 15 degrees or other angles), and the maximum north-south inclination angle in the predetermined north-south inclination angle range may be the latitude of the area where the double-sided single-axis module photovoltaic system is located plus the predetermined angle.
S312, divide the first preset time duration into a first preset number of time points.
In particular, the first preset number of time points are mutually spaced by a fourth preset length of time (for example 3 minutes or 4 minutes or 5 minutes or other lengths of time).
And S313, calculating the irradiation value corresponding to each time point according to a preset irradiation function for each north-south direction inclination angle in the preset south-north direction inclination angle range.
Specifically, in step S313, the north-south inclination angle in the preset irradiation function is respectively set as each north-south inclination angle within the preset north-south inclination angle range, and then each north-south inclination angle and the irradiation value corresponding to each time point are respectively calculated. After step S313, each of the north-south tilt angles corresponds to a first predetermined number of irradiation values.
And S314, accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the inclination angle in the north-south direction.
For example, if the latitude of the area where the double-sided single-axis module photovoltaic system is located is 34 degrees north latitude, and the first preset time length is the true sun from 9 am to 15 pm in the area where the double-sided single-axis module photovoltaic system is located, the first preset number is 90. The minimum north-south inclination angle in the predetermined north-south inclination angle range in step S311 may be 34 degrees minus the predetermined angle, the maximum north-south inclination angle in the predetermined north-south inclination angle range may be 34 degrees plus the predetermined angle, and if the predetermined angle is 15 degrees, step S311 determines that the predetermined north-south inclination angle range is 19 degrees to 49 degrees. Step S312 evenly divides the real solar time from 9 am to 15 pm into 90 time points, and the 90 time points are separated from each other by 4 minutes. For each north-south inclination angle (19 degrees, 20 degrees,.., 48 degrees, 49 degrees) in step S311, step S313 calculates irradiation values H1 to H90 corresponding to 90 time points, respectively. In step S314, the irradiation values H1 to H90 corresponding to the 90 time points are accumulated to be used as the total irradiation value corresponding to the north-south inclination angle in step S313.
S320, adjusting the north-south direction inclination angle of the double-sided single-axis component to the north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value.
S330, determining the irradiation value corresponding to each time in the preset time range corresponding to the current time according to the preset irradiation function.
Optionally, in an embodiment of the present invention, the step S330 of determining, according to a preset irradiation function, an irradiation value corresponding to each time within a preset time range corresponding to the current time may include the following steps:
s331, dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points includes a current time.
In particular, the second preset number of time points are mutually spaced by a fifth preset length of time (for example 1 or 2 minutes or other lengths of time).
And S332, calculating an irradiation value corresponding to each time point in a second preset number of time points according to the preset irradiation function.
The solar irradiance in the preset irradiance function in step S332 may be the solar irradiance at the current time in step S331.
For example, when the area where the double-sided single-axis module photovoltaic system is located is a true sun from 9 am to 15 pm, there are 90 time points between 9 am and 15 pm, and the current time in step S331 is one time point 9 of the 90 time points: 00, in step S331, the minimum time in the preset time range corresponding to the current time is 9:00 minus a second predetermined length of time (e.g., 3 minutes or 4 minutes or 5 minutes or other length of time), the maximum time in the predetermined range of time for the current time may be 9:00 plus a second preset time length, the second preset time length being 3 minutes, then the corresponding preset time range of the current time in step S331 is 8:57 to 9:03 and the second predetermined number is 7, step S331 is to connect 8:57 to 9:03 is divided into 7 time points, namely time point 8:57, time point 8:58, time point 8:59, time point 9:00, time point 9:01, time point 9:02 and time point 9:03,7 time points are spaced 1 minute apart. S332, calculating an irradiation value corresponding to each time point in the 7 time points according to a preset irradiation function, and obtaining 7 irradiation values H1, H2, H3, H4, H5, H6 and H7.
And S340, adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Optionally, in an embodiment of the present invention, the step S340 of adjusting the east-west tracking angle of the double-sided uniaxial component to the solar azimuth angle corresponding to the time corresponding to the maximum irradiance value among the irradiance values corresponding to the respective times may include the following steps:
and S341, determining the maximum irradiation value in the irradiation values of the second preset number of time points.
And S342, determining the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Specifically, step S342 may determine the solar azimuth angle at the time corresponding to the maximum irradiance value by using an astronomical algorithm.
And S343, adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Alternatively, in an embodiment of the present invention, the formula of the preset irradiation function may be:
wherein H is the irradiation value, H b As direct dose of solar radiation, H d Is the scattered radiation amount among the solar radiation amounts,
the latitude of the area where the double-sided single-axis component photovoltaic system is located, beta is a north-south inclination angle, sigma is a solar declination angle, omega is a solar time angle, and rho is the ground reflectivity.
Optionally, in an embodiment of the present invention, the calculation formula of σ may be:
σ＝23.45sin(2π(284+n)/365)
wherein n is the number of the product day, i.e. the date, and n is a constant value for any day of the year.
Alternatively, in one embodiment of the present invention, the formula for ω may be:
ω＝15(ST-12)
wherein ST is true sun.
The second embodiment of the invention has the following advantages: after determining the total irradiation value corresponding to each north-south direction inclination angle within the preset south-north direction inclination angle range within the first preset time length according to the preset irradiation function, adjusting the south-north direction inclination angle of the double-sided single-axis component to the south-north direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to each north-south direction inclination angle, setting the south-north direction inclination angle in the preset irradiation function to the south-north direction inclination angle corresponding to the maximum total irradiation value, further determining the irradiation value corresponding to each time within the preset time range corresponding to the current time according to the preset irradiation function, and adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle corresponding to the maximum irradiation value in the irradiation values corresponding to each time, wherein the preset irradiation function is a function among time, the south-north direction inclination angle, the direct irradiation amount, the scattering irradiation amount, the ground reflectivity and the irradiation value. In the embodiment of the invention, the north-south inclination angle and the east-west tracking angle of the double-sided single-axis component are determined based on the direct irradiation amount, the scattering irradiation amount and the ground reflectivity, the south-north inclination angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum within a first preset time length, and the east-west tracking angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum at the current time.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
EXAMPLE III
Referring to fig. 4, a structural block diagram of an embodiment of a tracking device of a bifacial single-axis module photovoltaic system of the present invention is shown, and specifically, the following modules may be included:
a first irradiation value determining module 410, configured to determine, according to a preset irradiation function, a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and irradiation value.
The first angle adjusting module 420 is configured to adjust the north-south tilt angle of the double-sided single-axis component to a north-south tilt angle corresponding to a maximum total irradiation value among total irradiation values corresponding to the north-south tilt angles, and set the north-south tilt angle in the preset irradiation function as the north-south tilt angle corresponding to the maximum total irradiation value.
The second irradiation value determining module 430 is configured to determine, according to the preset irradiation function, an irradiation value corresponding to each time within a preset time range corresponding to the current time.
And the second angle adjusting module 440 is configured to adjust the east-west tracking angle of the double-sided single-axis module to a solar azimuth angle of the time corresponding to the maximum irradiance value among irradiance values corresponding to each time.
The third embodiment of the invention has the following advantages: after determining the total irradiation value corresponding to each north-south direction inclination angle within the preset south-north direction inclination angle range within the first preset time length according to the preset irradiation function, adjusting the south-north direction inclination angle of the double-sided single-axis component to the south-north direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to each north-south direction inclination angle, setting the south-north direction inclination angle in the preset irradiation function to the south-north direction inclination angle corresponding to the maximum total irradiation value, further determining the irradiation value corresponding to each time within the preset time range corresponding to the current time according to the preset irradiation function, and adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle corresponding to the maximum irradiation value in the irradiation values corresponding to each time, wherein the preset irradiation function is a function among time, the south-north direction inclination angle, the solar irradiation amount, the ground reflectivity and the irradiation value. According to the embodiment of the invention, the north-south direction inclination angle and the east-west direction tracking angle of the double-sided single-axis component are determined based on the solar irradiation amount and the ground reflectivity, the total irradiation value of the double-sided single-axis component photovoltaic system in a first preset time length is the largest due to the north-south direction inclination angle of the double-sided single-axis component, and the total irradiation value of the double-sided single-axis component photovoltaic system in the current time is the largest due to the east-west direction tracking angle of the double-sided single-axis component, so that the front side and the back side of the double-sided single-axis component can receive solar radiation with the maximum efficiency, the power generation efficiency of the double-sided single-axis component photovoltaic system is greatly improved, and the power generation cost of the double-sided single-axis component photovoltaic system is reduced.
Example four
Referring to fig. 5, a flowchart illustrating steps of another embodiment of the tracking device of the bifacial single-axis module photovoltaic system of the present invention is shown, which may specifically include the following modules:
a first irradiation value determining module 510, configured to determine, according to a preset irradiation function, a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length; the preset irradiation function is a function among time, a north-south inclination angle, solar irradiation amount, ground reflectivity and an irradiation value.
Optionally, in an embodiment of the present invention, the first irradiation value determination module 510 includes:
the inclination angle range determining submodule 511 is used for determining a preset north-south inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, wherein the preset north-south inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located;
the first time distribution submodule 512 is configured to divide the first preset time length into a first preset number of time points;
a first irradiation value operator module 513, configured to calculate, for each north-south direction inclination angle within a preset south-north direction inclination angle range, an irradiation value corresponding to each time point according to a preset irradiation function;
and the irradiation value accumulation submodule 514 is configured to accumulate the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the north-south inclination angle.
The first angle adjusting module 520 is configured to adjust the north-south tilt angle of the double-sided single-axis component to a north-south tilt angle corresponding to a maximum total irradiation value among the total irradiation values corresponding to the north-south tilt angles, and set the north-south tilt angle in the preset irradiation function as a north-south tilt angle corresponding to the maximum total irradiation value.
A second irradiation value determining module 530, configured to determine, according to the preset irradiation function, an irradiation value corresponding to each time within a preset time range corresponding to the current time.
Optionally, in an embodiment of the present invention, the second irradiance value determining module 530 includes:
the second time allocation submodule 531 is configured to equally divide the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
and a second irradiation value operator module 532, configured to calculate, according to the preset irradiation function, an irradiation value corresponding to each time point in the second preset number of time points.
And a second angle adjusting module 540, configured to adjust the east-west tracking angle of the double-sided single-axis component to a solar azimuth angle of the time corresponding to the maximum irradiance value among irradiance values corresponding to each time.
Optionally, in an embodiment of the present invention, the second angle adjusting module 540 includes:
a maximum irradiation value determination sub-module 541 configured to determine a maximum irradiation value among irradiation values at a second preset number of time points;
the solar azimuth angle determining submodule 542 is used for determining a solar azimuth angle of a time point corresponding to the maximum irradiation value;
and the angle adjusting submodule 543 is used for adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Optionally, in an embodiment of the present invention, the formula of the preset irradiation function is:
wherein H is the irradiation value, H b As direct exposure to the sun, H d Is the scattered radiation amount among the solar radiation amounts,
the latitude of the area where the double-sided single-axis component photovoltaic system is located, beta is a north-south inclination angle, sigma is a solar declination angle, omega is a solar time angle, and rho is the ground reflectivity.
The fourth embodiment of the invention has the following advantages: after determining the total irradiation value corresponding to each north-south direction inclination angle within the preset south-north direction inclination angle range within the first preset time length according to the preset irradiation function, adjusting the south-north direction inclination angle of the double-sided single-axis component to the south-north direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to each north-south direction inclination angle, setting the south-north direction inclination angle in the preset irradiation function to the south-north direction inclination angle corresponding to the maximum total irradiation value, further determining the irradiation value corresponding to each time within the preset time range corresponding to the current time according to the preset irradiation function, and adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle corresponding to the maximum irradiation value in the irradiation values corresponding to each time, wherein the preset irradiation function is a function among time, the south-north direction inclination angle, the direct irradiation amount, the scattering irradiation amount, the ground reflectivity and the irradiation value. In the embodiment of the invention, the north-south inclination angle and the east-west tracking angle of the double-sided single-axis component are determined based on the direct irradiation amount, the scattering irradiation amount and the ground reflectivity, the south-north inclination angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum within a first preset time length, and the east-west tracking angle of the double-sided single-axis component enables the corresponding total irradiation value of the double-sided single-axis component photovoltaic system to be maximum at the current time.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
EXAMPLE five
Fig. 6 is a schematic structural diagram of a tracking device of a double-sided single-axis module photovoltaic system according to a fifth embodiment of the present invention, and as shown in fig. 6, the tracking device of the double-sided single-axis module photovoltaic system according to the fifth embodiment of the present invention may include: an interface 61, a processor 62, a memory 63, and a bus 64; wherein, the bus 64 is used for realizing the connection communication among the interface 61, the processor 62 and the memory 63; the memory 63 stores an executable program, and the processor 62 is configured to execute the executable program stored in the memory 63 to implement the following steps:
determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and an irradiation value;
adjusting the north-south direction inclination angle of the double-sided single-shaft component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
determining an irradiation value corresponding to each time within a preset time range corresponding to the current time according to the preset irradiation function;
and adjusting the east-west tracking angle of the double-sided single-shaft component to be the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Further, the processor 62 is configured to execute the executable program to specifically implement the following steps:
determining the preset north-south direction inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, wherein the preset north-south direction inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located;
equally dividing the first preset time length into a first preset number of time points;
calculating an irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
and accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the inclination angle in the north-south direction.
Further, the processor 62 is configured to execute the executable program to implement the following steps:
equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
and calculating the irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function.
Further, the processor 62 is configured to execute the executable program to implement the following steps:
determining the maximum irradiation value in the irradiation values of the second preset number of time points;
determining the solar azimuth angle of the time point corresponding to the maximum irradiation value;
and adjusting the east-west tracking angle of the double-sided single-axis component to be the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Further, the processor 62 is configured to execute the executable program, the preset irradiation function
The formula for the number is:
wherein H is the irradiation value, H b Is the direct dose of the solar dose, H d Is a scattered radiation amount among the solar radiation amounts,
and the latitude of the area where the double-sided single-shaft assembly photovoltaic system is located, beta is the inclination angle in the north-south direction, sigma is the solar declination angle, omega is the solar hour angle, and rho is the ground reflectivity.
The tracking device of the double-sided single-axis module photovoltaic system in the fifth embodiment of the present invention may be used to implement the technical solutions in the above-described embodiments of the method, and its implementation principle and technical effect are similar, which are not described herein again.
The present invention also provides a computer-readable storage medium having one or more executable programs stored thereon, the one or more executable programs being executable by one or more processors to perform the steps of:
determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and an irradiation value;
adjusting the north-south direction inclination angle of the double-sided single-shaft component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
determining an irradiation value corresponding to each time within a preset time range corresponding to the current time according to the preset irradiation function;
and adjusting the east-west tracking angle of the double-sided single-shaft component to be the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times.
Further, the one or more executable programs may be executable by the one or more processors to implement the steps of:
determining the preset north-south direction inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, wherein the preset north-south direction inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located;
equally dividing the first preset time length into a first preset number of time points;
calculating an irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
and accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the inclination angle in the north-south direction.
Further, the one or more executable programs are also executable by the one or more processors to perform the steps of:
equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
and calculating the irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function.
Further, the one or more executable programs are also executable by the one or more processors to perform the steps of:
determining the maximum irradiation value in the irradiation values of the second preset number of time points;
determining the solar azimuth angle of the time point corresponding to the maximum irradiation value;
and adjusting the east-west tracking angle of the double-sided single-shaft component to be the solar azimuth angle of the time point corresponding to the maximum irradiation value.
Further, the one or more executable programs may be further executable by the one or more processors, and the preset irradiation function may have a formula:
wherein H is the irradiation value, H b As direct exposure of said solar exposure, H d Is a scattered radiation amount among the solar radiation amounts,
the latitude of the area where the double-sided single-axis component photovoltaic system is located is beta, the south-north direction inclination angle is beta, the solar declination angle is sigma, the solar hour angle is omega, and the rho is the ground reflectivity.
The computer-readable storage medium of the embodiment of the present invention may be used to implement the technical solutions of the above-mentioned method embodiments, and the implementation principles and technical effects thereof are similar, and are not described herein again.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the embodiments of the application.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A tracking method of a bifacial single-axis module photovoltaic system is characterized by comprising the following steps:
determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and an irradiation value;
adjusting the north-south direction inclination angle of the double-sided single-shaft component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
determining an irradiation value corresponding to each time within a preset time range corresponding to the current time according to the preset irradiation function;
adjusting the east-west tracking angle of the double-sided single-shaft component to be the sun azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times;
the determining, according to the preset irradiation function, the irradiation value corresponding to each time within the preset time range corresponding to the current time includes:
equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
calculating an irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function;
the minimum time in the preset time range corresponding to the current time is the current time minus a second preset time length, and the maximum time in the preset time range corresponding to the current time is the current time plus the second preset time length;
wherein, the east-west tracking angle of the double-sided single-axis component is adjusted to the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to each time, and the method comprises the following steps:
determining the maximum irradiation value in the irradiation values of the second preset number of time points;
determining the solar azimuth angle of the time point corresponding to the maximum irradiation value;
and adjusting the east-west tracking angle of the double-sided single-axis component to be the solar azimuth angle of the time point corresponding to the maximum irradiation value.
2. The method of claim 1, wherein determining a total irradiance value corresponding to each north-south inclination angle within a predetermined north-south inclination angle range within a first predetermined time period according to a predetermined irradiance function comprises:
determining the preset north-south direction inclination angle range according to the latitude of the area where the double-sided single-axis component photovoltaic system is located, wherein the preset north-south direction inclination angle range comprises the latitude of the area where the double-sided single-axis component photovoltaic system is located;
equally dividing the first preset time length into a first preset number of time points;
calculating an irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the north-south inclination angle.
3. The method of claim 1, wherein the formula of the preset irradiation function is:
wherein H is the irradiation value, H b Is the direct dose of the solar dose, H d Is the scattered radiation of the solar radiation,
the latitude of the area where the double-sided single-axis component photovoltaic system is located is beta, the south-north direction inclination angle is beta, the solar declination angle is sigma, the solar hour angle is omega, and the rho is the ground reflectivity.
4. A tracking device for a two-sided single-axis module photovoltaic system, comprising:
the first irradiation value determining module is used for determining a total irradiation value corresponding to each north-south direction inclination angle within a preset north-south direction inclination angle range within a first preset time length according to a preset irradiation function; the preset irradiation function is a function among time, a north-south direction inclination angle, solar irradiation quantity, ground reflectivity and an irradiation value;
the first angle adjusting module is used for adjusting the north-south direction inclination angle of the double-sided single-axis component to a north-south direction inclination angle corresponding to the maximum total irradiation value in the total irradiation values corresponding to the north-south direction inclination angles, and setting the north-south direction inclination angle in the preset irradiation function as the north-south direction inclination angle corresponding to the maximum total irradiation value;
the second irradiation value determining module is used for determining irradiation values corresponding to all times in a preset time range corresponding to the current time according to the preset irradiation function;
the second angle adjusting module is used for adjusting the east-west tracking angle of the double-sided single-axis component to the solar azimuth angle of the time corresponding to the maximum irradiation value in the irradiation values corresponding to all times;
the second irradiation value determination module includes:
the second time distribution submodule is used for equally dividing the preset time range corresponding to the current time into a second preset number of time points; the second preset number of time points comprises the current time;
the second irradiation value operator module is used for calculating the irradiation value corresponding to each time point in the second preset number of time points according to the preset irradiation function;
the minimum time in the preset time range corresponding to the current time is the current time minus a second preset time length, and the maximum time in the preset time range corresponding to the current time is the current time plus the second preset time length;
wherein the second angle adjustment module further comprises:
the maximum irradiation value determining submodule is used for determining the maximum irradiation value in the irradiation values of a second preset number of time points;
the solar azimuth angle determining submodule is used for determining a solar azimuth angle of a time point corresponding to the maximum irradiation value;
and the angle adjusting submodule is used for adjusting the east-west tracking angle of the double-sided single-shaft assembly to the solar azimuth angle of the time point corresponding to the maximum irradiation value.
5. The apparatus of claim 4, wherein the first irradiance value determining module is to comprise:
the inclination angle range determining submodule is used for determining the preset north-south inclination angle range according to the latitude of the area where the double-sided single-axis assembly photovoltaic system is located, and the preset north-south inclination angle range comprises the latitude of the area where the double-sided single-axis assembly photovoltaic system is located;
the first time distribution submodule is used for dividing the first preset time length into a first preset number of time points;
the first irradiation value operator module is used for calculating the irradiation value corresponding to each time point according to the preset irradiation function for each north-south direction inclination angle in the preset north-south direction inclination angle range;
and the irradiation value accumulation submodule is used for accumulating the irradiation values corresponding to the first preset number of time points to obtain a total irradiation value corresponding to the inclination angle in the north-south direction.
6. A tracking device for a two-sided single-axis module photovoltaic system, comprising: an interface, a bus, a memory and a processor, the interface, the memory and the processor being connected by the bus, the memory being used for storing an executable program, the processor being configured to run the executable program to implement the steps of the tracking method of a bifacial, single-axis module photovoltaic system according to any one of claims 1 to 3.
7. A computer-readable storage medium, characterized in that it stores thereon an executable program that is executed by a processor to implement the steps of the tracking method of a bifacial, single-axis module photovoltaic system as claimed in any one of claims 1 to 3.
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