CN112272007A - Method and device for determining influence of shelter on photovoltaic module - Google Patents

Method and device for determining influence of shelter on photovoltaic module Download PDF

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Publication number
CN112272007A
CN112272007A CN202011198172.6A CN202011198172A CN112272007A CN 112272007 A CN112272007 A CN 112272007A CN 202011198172 A CN202011198172 A CN 202011198172A CN 112272007 A CN112272007 A CN 112272007A
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receiving surface
light receiving
light
determining
distance
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CN112272007B (en
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王智超
杨宗军
程晓峰
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Hefei Sungrow New Energy Technology Co Ltd
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Hefei Sungrow New Energy Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
    • H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

The application provides a method and a device for determining the influence of a shelter on a photovoltaic module, wherein the photovoltaic module comprises a battery unit and an illuminated surface, the shelter is positioned on one side of the illuminated surface, which is far away from the battery unit, and the method comprises the following steps: determining a light loss angle of a predetermined point on the light receiving surface, wherein the light loss angle is an angle of light which cannot be received due to shielding of a shielding object; and determining an influence parameter of the shielding object on the predetermined area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter for representing the influence of the shielding object on the received light intensity of the predetermined area. The method for determining the influence of the shielding object on the light receiving surface of the photovoltaic module can determine the influence of the shielding object on the light receiving surface of the photovoltaic module, effectively solves the problem that a method for determining the influence of the shielding object on the light receiving surface of the photovoltaic module is absent in the prior art, and can accurately determine the power generation amount of the photovoltaic module when being applied to a method for determining the power generation amount of the photovoltaic module.

Description

Method and device for determining influence of shelter on photovoltaic module
Technical Field
The application relates to the field of photovoltaics, in particular to a method and a device for determining the influence of a shelter on a photovoltaic module, a method for determining the loss of the generated energy of the photovoltaic module, a method for determining the installation position of the shelter, a computer-readable storage medium, a processor and a photovoltaic system.
Background
The double-sided photovoltaic module is a novel module appearing in recent years, and is characterized in that scattered light received by the back can be utilized to further improve the output power of the module.
According to the traditional single-sided photovoltaic module, back shielding does not need to be considered, but the back shielding of the double-sided photovoltaic module can influence output power and cause the problems of mismatch or hot spots and the like.
In the related art, a method of evaluating the back surface occlusion of the double-sided component is lacking, but in practice, in the case of calculating the power generation amount loss of the back surface of the component, etc., it is important to evaluate the back surface occlusion of the double-sided component, and if the back surface is not occluded by default or the occlusion is intentionally ignored, the calculated result is inaccurate.
Therefore, a method for determining the influence of a blocking object on the light receiving surface is needed.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
A primary object of the present application is to provide a method and an apparatus for determining an influence of a barrier on a photovoltaic module, a method for determining a loss of generated energy of a photovoltaic module, a method for determining an installation position of a barrier, a computer-readable storage medium, a processor, and a photovoltaic system, so as to solve the problem of the prior art that a method for determining an influence of a barrier on light received by a light receiving surface of a photovoltaic module is absent.
According to an aspect of an embodiment of the present invention, there is provided a method of determining an influence of a shade on a photovoltaic module, the photovoltaic module including a battery cell and a light receiving surface, the shade being located on a side of the light receiving surface away from the battery cell, the method including: determining a light loss angle of a predetermined point on the light receiving surface, wherein the light loss angle is an angle of light which cannot be received due to the shielding of the shielding object; and determining an influence parameter of the shielding object on a preset region of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter for representing the influence of the shielding object on the received light intensity of the preset region.
Optionally, determining the light loss angle of a predetermined point on the light receiving surface comprises: determining an included angle between a connecting line of a first edge point of the shielding object and the predetermined point and the light receiving surface to obtain a first included angle, wherein the first edge point is a point with the largest distance from the light receiving surface in a first direction and a point with the largest distance from a predetermined side edge of the light receiving surface in a second direction, the projection of the shielding object on the light receiving surface is located between the predetermined side edge and the predetermined point, the first direction is perpendicular to the light receiving surface, and the second direction is perpendicular to the first direction; determining an included angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second included angle, wherein the second edge point is a point which has the smallest distance to the light receiving surface in the first direction and has the smallest distance to the predetermined side edge in the second direction; and calculating the difference value of the first included angle and the second included angle to obtain the light loss angle.
Optionally, before determining the light loss angle of the predetermined point on the light receiving surface, the method further comprises: obtaining a size parameter of the obstruction, the size parameter comprising: the width of the shielding object, the height of the shielding object, a first distance and a second distance, wherein the first distance is the distance between the second edge point and the light receiving surface in the first direction, and the second distance is the maximum distance between the second edge point and the preset side edge in the second direction; obtaining a third distance, wherein the third distance is a minimum distance between the predetermined point and the predetermined side edge in the second direction.
Optionally, before obtaining the size parameter of the obstruction and before obtaining the third distance, the method further comprises: obtaining a longitudinal section view of a structure comprising a photovoltaic module and the barrier, and obtaining a dimension parameter of the barrier, including: acquiring the dimension parameter according to the longitudinal section drawing, and acquiring a third distance, wherein the acquiring comprises the following steps: and acquiring the third distance according to the longitudinal section diagram.
Optionally, a corresponding longitudinal section in the longitudinal section view is parallel to a longitudinal direction of the light receiving surface.
Optionally, determining an included angle between a connecting line of a first edge point of the blocking object and the predetermined point and the light receiving surface to obtain a first included angle, including: calculating the first included angle according to the height of the shielding object, the width of the shielding object, the first distance, the second distance and the third distance, determining an included angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface, and obtaining a second included angle, wherein the method comprises the following steps: and calculating the second included angle according to the first distance, the second distance and the third distance.
Optionally, the determining the influence parameter of the obstruction on the predetermined area of the light receiving surface according to the light loss angle includes: determining the loss proportion of the predetermined point according to at least the light loss angle of the predetermined point; determining the loss proportion of the predetermined area based at least on the loss proportion of the predetermined point.
Optionally, determining the loss ratio of the predetermined point according to the light loss angle of the predetermined point includes: acquiring the maximum angle of the light received by the predetermined point when the shielding object does not exist; and calculating the ratio of the light loss angle of the predetermined point to the maximum angle to obtain the loss proportion of the predetermined point.
Optionally, before determining the loss proportion of the predetermined area according to at least the loss proportion of the predetermined point, the determining method further includes: and acquiring a fourth distance and a fifth distance, wherein the fourth distance is the minimum distance between the predetermined region and the edge of the light receiving surface in the second direction, the fifth distance is the maximum distance between the predetermined region and the predetermined edge side in the second direction, the projection of the shielding object on the light receiving surface is positioned between the predetermined edge and the predetermined point, the second direction is perpendicular to the first direction, and the first direction is perpendicular to the light receiving surface.
Optionally, determining the loss proportion of the predetermined area at least according to the loss proportion of the predetermined point includes: calculating the loss ratio of the predetermined area according to the loss ratio of the predetermined point, the fourth distance, and the fifth distance.
Optionally, there are two light receiving surfaces, namely a front light receiving surface and a back light receiving surface, the battery unit is located between the front light receiving surface and the back light receiving surface, and the shielding object is located on a side of the back light receiving surface away from the battery unit.
Optionally, the shade includes a support for supporting the photovoltaic module.
According to another aspect of the embodiments of the present invention, there is also provided a method for determining a loss in power generation of a photovoltaic module, including: executing any one of the methods to obtain an influence parameter of the light receiving surface of the photovoltaic module; and determining the electric quantity loss of the photovoltaic module caused by the shielding of the shielding object according to the influence parameters of the light receiving surface.
According to still another aspect of the embodiments of the present invention, there is also provided a method of determining a mounting position of a shade, including: executing any one of the methods for multiple times to obtain influence parameters of a plurality of light receiving surfaces corresponding to the shielding object at different preparation positions; comparing the influence parameters of the light receiving surfaces to obtain a comparison result; and determining the preparation position corresponding to the minimum influence parameter of the light receiving surface as the installation position of the shielding object.
According to another aspect of the embodiments of the present invention, there is also provided a device for determining an influence of a blocking object on a photovoltaic module, the photovoltaic module includes a battery unit and a light receiving surface, the blocking object is located on a side of the light receiving surface away from the battery unit, the device includes a first determining unit and a second determining unit, wherein the first determining unit is configured to determine a light loss angle of a predetermined point on the light receiving surface, the light loss angle being an angle of light that is not received due to blocking by the blocking object; the second determining unit is used for determining an influence parameter of the shielding object on a predetermined area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter representing the influence of the shielding object on the received light intensity of the predetermined area.
According to still another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the methods.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes any one of the methods.
According to another aspect of the embodiment of the invention, a photovoltaic system is further provided, which includes a photovoltaic module and a determination device for determining the influence of a shelter on the photovoltaic module, wherein the photovoltaic module includes a battery unit and a light receiving surface; the determination device of the influence of the shade on the photovoltaic module is used for executing any one of the determination methods.
Optionally, the photovoltaic module further comprises a front substrate and a back substrate, the battery unit is located between the front substrate and the back substrate, the surface of the front substrate away from the battery unit is a front light-receiving surface, and the surface of the back substrate away from the battery unit is a back light-receiving surface.
In the embodiment of the invention, a method for determining the influence of a shielding object on a photovoltaic module is provided, and according to the determined light loss angle of the predetermined point on the light receiving surface, a parameter of the influence of the shielding object on the received light intensity of the predetermined area of the light receiving surface is determined, so that the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module can be more accurately determined, and the problem that a method for determining the influence of the shielding object on the received light of the light receiving surface is absent in the prior art is effectively solved. And, applying the method to the determination method of the power generation amount of the photovoltaic module, the power generation amount of the photovoltaic module can be accurately determined.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a schematic flow diagram generated by a method of determining the effect of a covering on a photovoltaic module according to an embodiment of the application;
FIG. 2 shows a longitudinal cross-sectional view of a photovoltaic module and a shade according to an embodiment of the present application;
FIG. 3 shows a schematic flow diagram generated by a method for determining loss of power generation of a photovoltaic module according to an embodiment of the present application;
FIG. 4 illustrates a schematic flow chart generated by a method for determining an installation location of a covering according to an embodiment of the present application;
FIG. 5 shows a schematic view of a device for determining the effect of a covering on a photovoltaic module according to an embodiment of the present application; and
fig. 6 is a schematic diagram showing the shading effect on the back light-receiving surface according to the embodiment of the present application as a function of distance.
Wherein the figures include the following reference numerals:
101. a shelter; 102. a back substrate; 103. a battery cell; 104. and a front substrate.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background, the prior art lacks a method for determining the influence of a barrier on the light reception surface of a photovoltaic module, and in order to solve the above-mentioned problems, the present application provides a method for determining the influence of a barrier on a photovoltaic module, a determination device, a method for determining a loss of power generation of a photovoltaic module, a method for determining the installation position of a barrier, a computer-readable storage medium, a processor and a photovoltaic system.
According to an embodiment of the application, a method of determining the effect of a shade on a photovoltaic module is provided.
Fig. 1 is a flowchart of a method for determining an influence of a mask on a photovoltaic module according to an embodiment of the present application, the photovoltaic module including a battery cell and a light receiving surface, the mask being located on a side of the light receiving surface away from the battery cell, that is, on two opposite sides of the light receiving surface, that is, a first side and a second side, respectively, wherein the battery cell is located on the first side of the light receiving surface, and the mask is located on the second side of the light receiving surface. The term "the shield is located on a side of the light receiving surface away from the battery cell" may also be interpreted as meaning that the shield is located between the light receiving surface and a predetermined light source, the predetermined light source being a source of light received by the light receiving surface. As shown in fig. 1, the method comprises the steps of:
step S101 of determining a light loss angle of a predetermined point on the light receiving surface, where the light loss angle is an angle of a light ray that cannot be received due to the shielding of the shielding object, that is, an angle formed by the shielded incident light ray is a light loss angle, for example, in a case where there is no shielding object normally, an angle formed by the shielded incident light ray is 180 °, in a case where there is no shielding object, an angle formed by the shielded incident light ray is 30 °, that is, an angle of a light ray received by the predetermined point is 30 ° lost, and only 150 °;
step S102, determining an influence parameter of the shielding object on a predetermined area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter representing the influence of the shielding object on the received light intensity of the predetermined area.
The method for determining the influence of the shielding object on the photovoltaic module determines the parameter of the influence of the shielding object on the received light intensity of the predetermined area of the light receiving surface according to the determined light loss angle of the predetermined point on the light receiving surface, can more accurately determine the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module, and effectively solves the problem that the method for determining the influence of the shielding object on the received light of the light receiving surface is absent in the prior art. And, applying the method to the determination method of the power generation amount of the photovoltaic module, the power generation amount of the photovoltaic module can be accurately determined.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
According to a specific embodiment of the present application, determining the light loss angle at a predetermined point on the light receiving surface includes: determining an angle between a line connecting a first edge point of the mask and the predetermined point and the light receiving surface to obtain a first angle, the first edge point being a point having a maximum distance from the light receiving surface in a first direction and having a maximum distance from a predetermined side edge of the light receiving surface in a second direction, a projection of the mask on the light receiving surface being located between the predetermined side edge and the predetermined point, the first direction being perpendicular to the light receiving surface, the second direction being perpendicular to the first direction, for example, a leftmost edge of the predetermined side edge of the light receiving surface (determined in a square facing the screen) in fig. 2; determining an angle between a line connecting a second edge point of the mask and the predetermined point and the light receiving surface to obtain a second angle, where the second edge point is a point having a minimum distance from the light receiving surface in the first direction and a minimum distance from the predetermined edge point in the second direction, for example, a longitudinal section of the mask shown in fig. 2 is a square, the first edge point of the mask is a vertex on the upper right side (determined in a direction facing the screen) of the square, and the second edge point is a vertex on the lower left side of the square, and for other irregular-pattern masks, the first edge point and the second edge point are determined according to the above definition; and calculating the difference value between the first included angle and the second included angle to obtain the light loss angle, wherein the light loss angle is actually the included angle between a first preset line segment and a second preset line segment, the first preset line segment is the connecting line of the first edge point and the preset point, and the second preset line segment is the connecting line of the second edge point and the preset point. The determination method comprises the steps of determining an included angle between a connecting line of a first edge point of the shielding object and the predetermined point and the light receiving surface to obtain the first included angle, determining an included angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second included angle, and obtaining the light loss angle according to a difference value of the first included angle and the second included angle. The method is simple and efficient, the light loss angle can be accurately determined, and the influence parameters of the shielding object on the preset area of the light receiving surface can be further accurately determined according to the light loss angle.
Of course, in an actual application process, the light loss angle is not limited to be determined by the first included angle and the second included angle, and the included angle between the first predetermined line segment and the second predetermined line segment may also be determined according to other suitable methods.
In accordance with another specific embodiment of the present application, before determining the light loss angle at the predetermined point on the light receiving surface, the method further comprises: obtaining a size parameter of the obstruction, the size parameter including: the width of the shade, the height of the shade, a first distance and a second distance, wherein, the first distance is a distance between the second edge point and the light receiving surface in the first direction, the second distance is a maximum distance of the second edge point from the predetermined side edge in the second direction, in the case where the light receiving surface is a rectangular light receiving surface, the minimum distance between the second edge point and the predetermined side edge is substantially the same as the distance between the second edge point and the predetermined side edge, in other shapes of the light receiving surface, the predetermined side edge is located at a different distance from a second edge point, and therefore, the second distance is a maximum distance between the edge point and the predetermined side edge, in fig. 2, the first distance is H, the second distance is l, and both the width and the height of the shielding object are a; a third distance is obtained, wherein the third distance is a minimum distance between the predetermined point and the predetermined side edge in the second direction. By obtaining the width, the height, the first distance and the second distance of the shielding object, the determining method determines the size of the shielding object and the relative position parameter between the shielding object and the light receiving surface and the fixed point, so that the light loss angle of the predetermined point can be determined more accurately, and further the influence parameter of the shielding object on the predetermined area of the light receiving surface is determined according to the light loss angle.
In accordance with another specific embodiment of the present application, before the obtaining the dimension parameter of the obstruction and before the obtaining the third distance, the method further includes: obtaining a longitudinal section view of a structure comprising the photovoltaic module and the shelter, and obtaining a dimension parameter of the shelter, wherein the dimension parameter comprises: obtaining the dimension parameter according to the longitudinal section drawing, and obtaining a third distance, including: and acquiring the third distance according to the longitudinal section. According to the determination method, the size parameter and the third distance of the shielding object are obtained by obtaining the longitudinal section of the shielding object, so that the obtaining process of the size parameter is more efficient and simpler.
In a specific embodiment of the present application, a longitudinal section corresponding to the longitudinal sectional view is parallel to a longitudinal direction of the light receiving surface. Of course, in the case where a longitudinal sectional view of the structure of the shade is obtained by those skilled in the art according to the shape of the shade, the longitudinal section corresponding to the longitudinal sectional view may be parallel to the short side direction of the light receiving surface.
In order to more accurately determine an included angle between a connecting line of the first edge point of the shielding object and the predetermined point and the light receiving surface, and further ensure that the influence of the shielding object on the light received by the photovoltaic module can be more accurately determined according to the determining method, in another specific embodiment of the present application, an included angle between the connecting line of the first edge point of the shielding object and the predetermined point and the light receiving surface is determined to obtain a first included angle, including: and calculating the first included angle according to the height of the shielding object, the width of the shielding object, the first distance, the second distance and the third distance. According to the determined height of the shielding object, the width of the shielding object, the first distance, the second distance and the third distance, the first included angle can be obtained more accurately. In practical applications, the height and width of the shade are the same for shades having a square longitudinal cross-section.
In order to more accurately determine an angle between a connecting line of the second edge point of the shielding object and the predetermined point and the light receiving surface, and further ensure that the influence of the shielding object determined by the determining method on the photovoltaic module is more accurate, in another specific embodiment of the present application, the determining an angle between the connecting line of the second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second angle includes: and calculating the second included angle according to the first distance, the second distance and the third distance. According to the first distance, the second distance and the third distance, the second included angle can be obtained more accurately.
In another specific embodiment of the present application, the influence parameter includes a loss ratio, the loss ratio is a ratio of the light loss angle to a predetermined light angle, the predetermined light angle is an angle of light received when the shielding object is not shielded, and the influence parameter of the shielding object on the predetermined area of the light receiving surface is determined according to the light loss angle, including: determining said loss ratio of said predetermined point based at least on the angle of light loss at said predetermined point; determining the loss ratio of the predetermined area based at least on the loss ratio of the predetermined point. The determining method determines the loss proportion of the predetermined point according to the light loss angle of the predetermined point, and determines the loss proportion of the predetermined area according to the loss proportion of the predetermined point, so that the accurate loss proportion can be obtained efficiently and quickly.
In practical applications, a specific process of calculating the first included angle and the second included angle to obtain the light loss angle is as follows, and fig. 2 shows a two-dimensional cross-sectional view of a photovoltaic module and a shield according to a specific embodiment of the present application, where the cross-sectional view of the shield 101 is a square and is located on a side of a light receiving surface away from the battery cell 103, the predetermined point is denoted by M, the width and height of the shield 101 are denoted by a, the first distance is denoted by H, the second distance is denoted by L, the third distance is denoted by L, and the calculation formulas of the first included angle β and the second included angle γ are as follows:
Figure BDA0002754587780000071
Figure BDA0002754587780000072
then, the above-mentioned light loss angle α is
α＝β-γ
The fourth distance is denoted as L1And the fifth distance is L2The specific process of determining the loss ratio of the predetermined point according to the light loss angle of the predetermined point is as follows:
Figure BDA0002754587780000081
wherein pi is the maximum angle of the received light when the predetermined point M is not shielded by the shielding object.
In an embodiment of the present application, determining the loss ratio of the predetermined point according to the light loss angle of the predetermined point includes: acquiring the maximum angle of the light received by the predetermined point when the shielding object does not exist; and calculating the ratio of the light loss angle of the predetermined point to the maximum angle to obtain the loss ratio of the predetermined point. By calculating the ratio of the light loss angle of the predetermined point to the maximum angle of the received light when no shielding object is used for shielding, the loss ratio of the predetermined point can be obtained more accurately, and then the influence parameter can be determined accurately.
In order to effectively determine the influence of the obstruction on the light received by the photovoltaic module, according to another specific embodiment of the present application, before determining the loss ratio of the predetermined area based on at least the loss ratio of the predetermined point, the determining method further comprises: a fourth distance and a fifth distance are acquired, the fourth distance being a minimum distance between the predetermined region and an edge of the light receiving surface in the second direction, the fifth distance being a maximum distance between the predetermined region and a predetermined edge side in the second direction, a projection of the mask on the light receiving surface being located between the predetermined edge and the predetermined point, the second direction being perpendicular to the first direction, the first direction being perpendicular to the light receiving surface.
In another embodiment of the present application, determining the loss ratio of the predetermined area based on at least the loss ratio of the predetermined point includes: calculating the loss ratio of the predetermined area based on the loss ratio of the predetermined point, the fourth distance, and the fifth distance. Calculating the loss ratio of the predetermined area through the loss ratio of the predetermined point, the fourth distance and the fifth distance ensures effective determination of the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module.
In practical applications, two of the light receiving surfaces are a front light receiving surface and a back light receiving surface, and the battery cell is located between the front light receiving surface and the back light receiving surface. By the determination method, the influence of the shielding object on the received light of the front light receiving surface and the back light receiving surface of the double-sided photovoltaic module can be determined.
In a specific embodiment, the shielding object is located on a side of the back light-receiving surface away from the battery unit. By the method, the influence of the shielding object on the light received by the back light receiving surface of the photovoltaic module can be accurately determined.
In a particular embodiment of the present application, the shade comprises a support for supporting the photovoltaic module. By the method, the influence of the bracket of the photovoltaic module on the light receiving surface receiving light can be determined. In a specific embodiment, the support is a sandal strip.
According to another exemplary embodiment of the present application, a method for determining a loss of power generation of a photovoltaic module is provided, and fig. 3 shows a flowchart generated by the method for determining a loss of power generation of a photovoltaic module according to the present application, the method comprising the steps of:
step S201, executing any determination method of the influence of the shelter on the photovoltaic module to obtain an influence parameter of a light receiving surface of the photovoltaic module;
step S202, determining an electric power loss of the photovoltaic module due to the shielding of the shielding object according to the influence parameter of the light receiving surface.
According to the method for determining the power generation capacity loss of the photovoltaic module, the influence parameter of the light receiving surface of the photovoltaic module is obtained by executing the method for determining the influence of the shielding object on the photovoltaic module, the power loss of the photovoltaic module caused by shielding of the shielding object can be determined according to the influence parameter, and the influence of the shielding object on the power loss of the light receiving surface of the photovoltaic module can be more accurately determined by the method for determining the power generation capacity loss of the photovoltaic module.
There is also provided in accordance with yet another exemplary embodiment of the present application, a method of determining a mounting position of a shade, and fig. 4 shows a flowchart generated by the method of determining a mounting position of a shade in accordance with the present application, the method including the steps of:
step S301, executing any determination method of the influence of the shielding object on the photovoltaic module for multiple times to obtain influence parameters of multiple light receiving surfaces of the shielding object corresponding to different preparation positions;
step S302, comparing the influence parameters of a plurality of light receiving surfaces to obtain a comparison result;
in step S303, the preliminary position corresponding to the smallest influence parameter of the light receiving surface is determined as the attachment position of the shade.
The method for determining the installation position of the shielding object obtains the influence parameters of a plurality of light receiving surfaces corresponding to different preparation positions of the shielding object by executing any method for determining the influence of the shielding object on the photovoltaic module for a plurality of times, and determines the preparation position corresponding to the minimum influence parameter of the light receiving surfaces as the installation position of the shielding object by comparing the influence parameters, so that the shielding object is installed according to the installation position determined by the method, the influence of the shielding object on the light receiving surfaces of the photovoltaic module is small, and the adverse influence of lightening loss and the like of the light receiving surfaces of the photovoltaic module caused by the shielding of the shielding object is effectively relieved.
In an actual application process, according to the method for determining the installation position of the shielding object, the specific steps for determining the installation position of the shielding object are as follows:
the shelter can be a photovoltaic support, the width of a purline of the photovoltaic support is generally 40mm, the cross section of the purline is rectangular, if a double-sided photovoltaic module needs to be installed, the purline is assumed to be located in the middle of a cell, and the size of the cell is 158.75 mm. According to fig. 6, when the distance between the purline and the back surface of the assembly is less than or equal to 50mm, the influence degree of the shielding object on the light received surface of the back surface is large, after the distance reaches 100mm, the influence degree of the light received is small, the change of the degree is small, and the determination method can provide theoretical calculation basis for the design of the distance of the bracket. Of course, the above-mentioned shelter can also be other shelters.
The embodiment of the present application further provides a device for determining an influence of a shade on a photovoltaic module, and it should be noted that the device for determining an influence of a shade on a photovoltaic module in the embodiment of the present application can be used to execute the method for determining an influence of a shade on a photovoltaic module provided in the embodiment of the present application. The following describes a device for determining the influence of the shade on the photovoltaic module, which is provided by the embodiment of the application.
Fig. 5 is a schematic diagram of an apparatus for determining an influence of a mask on a photovoltaic module according to an embodiment of the present application, the photovoltaic module including a battery cell and a light receiving surface, the mask being located on a side of the light receiving surface away from the battery cell, that is, on two opposite sides of the light receiving surface, that is, a first side and a second side, respectively, wherein the battery cell is located on the first side of the light receiving surface, and the mask is located on the second side of the light receiving surface. The term "the shield is located on a side of the light receiving surface away from the battery cell" may also be interpreted as meaning that the shield is located between the light receiving surface and a predetermined light source, the predetermined light source being a source of light received by the light receiving surface. As shown in fig. 5, the apparatus includes: a first determining unit 10 and a second determining unit 20, wherein the first determining unit 10 is configured to determine a light loss angle of a predetermined point on the light receiving surface, the light loss angle being an angle of a light ray which cannot be received by the shielding of the shielding object, that is, an angle formed by the shielded incident light ray being a light loss angle, for example, in a case where there is normally no shielding object, an angle of a light ray received by the predetermined point is 180 °, in a case where there is shielding of the shielding object, an angle formed by the shielded incident light ray is 30 °, that is, an angle of a light ray received by the predetermined point is 30 ° lost, and only 150 °; the second determining unit 20 is configured to determine an influence parameter of the mask on a predetermined region of the light receiving surface according to the light loss angle, where the influence parameter is a parameter indicating an influence of the mask on a received light intensity of the predetermined region.
The determining device for determining the influence of the shielding object on the photovoltaic module determines the light loss angle of the predetermined point on the light receiving surface through the first determining unit, and determines the parameter of the influence of the shielding object on the received light intensity of the predetermined area of the light receiving surface through the second determining unit, so that the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module can be determined more accurately, and the problem that a method for determining the influence of the shielding object on the received light of the light receiving surface is lacked in the prior art is effectively solved. And, apply to the device of confirming the generating capacity of the photovoltaic module in this device, can confirm the generating capacity of the photovoltaic module accurately.
According to a specific embodiment of the present application, the first determining unit includes a first determining module, a second determining module, and a calculating module, wherein the first determining module is configured to determine an angle between a line connecting a first edge point of the obstruction with the predetermined point and the light receiving surface to obtain a first angle, the first edge point is a point having a largest distance from the light receiving surface in a first direction and a largest distance from a predetermined side edge of the light receiving surface in a second direction, a projection of the obstruction on the light receiving surface is located between the predetermined side edge and the predetermined point, the first direction is perpendicular to the light receiving surface, the second direction is perpendicular to the first direction, for example, in fig. 2, a leftmost edge of the light receiving surface of the predetermined side edge (determined in a square facing the screen); the second determining module is configured to determine an angle between a connecting line of a second edge point of the mask and the predetermined point and the light receiving surface to obtain a second angle, where the second edge point is a point having a smallest distance from the light receiving surface in the first direction and a smallest distance from the predetermined side edge in the second direction, for example, a longitudinal section of the mask shown in fig. 2 is a square, the first edge point of the mask is a vertex on the upper right side (determined in a direction facing the screen) of the square, the second edge point is a vertex on the lower left side of the square, and for other irregular-pattern masks, the first edge point and the second edge point are determined according to the above definition; the calculating module is configured to calculate a difference between the first included angle and the second included angle to obtain the light loss angle, where the light loss angle is actually an included angle between a first predetermined line segment and a second predetermined line segment, where the first predetermined line segment is a connection line between a first edge point and the predetermined point, and the second predetermined line segment is a connection line between a second edge point and the predetermined point. The determining device determines an angle between a connecting line of a first edge point of the shielding object and the predetermined point and the light receiving surface to obtain the first angle, determines an angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second angle, and obtains the light loss angle according to a difference value between the first angle and the second angle. The device is simple and efficient, the light loss angle can be accurately determined, and the influence parameters of the shielding object on the preset area of the light receiving surface can be further accurately determined according to the light loss angle.
Of course, in an actual application process, the light loss angle is not limited to be determined by the first included angle and the second included angle, and the included angle between the first predetermined line segment and the second predetermined line segment may also be determined according to other suitable methods.
According to another specific embodiment of the present application, the determining apparatus further includes a first obtaining unit and a second obtaining unit, where the first obtaining unit is configured to obtain a size parameter of the obstruction, and the size parameter includes: the width of the shade, the height of the shade, a first distance and a second distance, wherein, the first distance is a distance between the second edge point and the light receiving surface in the first direction, the second distance is a maximum distance of the second edge point from the predetermined side edge in the second direction, in the case where the light receiving surface is a rectangular light receiving surface, the minimum distance between the second edge point and the predetermined side edge is substantially the same as the distance between the second edge point and the predetermined side edge, in other shapes of the light receiving surface, the predetermined side edge is located at a different distance from a second edge point, and therefore, the second distance is a maximum distance between the edge point and the predetermined side edge, in fig. 2, the first distance is H, the second distance is l, and both the width and the height of the shielding object are a; the second obtaining unit is configured to obtain a third distance, where the third distance is a minimum distance between the predetermined point and the predetermined side edge in the second direction. By obtaining the width, the height, the first distance and the second distance of the shielding object, the determining device determines the size of the shielding object and the relative position parameter between the shielding object and the light receiving surface and the fixed point, so that the light loss angle of the predetermined point can be determined more accurately, and further the influence parameter of the shielding object on the predetermined area of the light receiving surface is determined according to the light loss angle.
According to another specific embodiment of the present application, the control device further includes a third obtaining unit, where the third obtaining unit is configured to obtain a longitudinal sectional view of a structure including the photovoltaic module and the barrier, the first obtaining unit includes a first obtaining module, the first obtaining module is configured to obtain the dimension parameter according to the longitudinal sectional view, and the second obtaining unit includes a second obtaining module, the second obtaining module is configured to obtain the third distance according to the longitudinal sectional view. The determining device obtains the size parameter and the third distance of the shielding object by obtaining the longitudinal section of the shielding object, so that the obtaining process of the size parameter is more efficient and simpler.
In a specific embodiment of the present application, a longitudinal section corresponding to the longitudinal sectional view is parallel to a longitudinal direction of the light receiving surface. Of course, in the case where a longitudinal sectional view of the structure of the shade is obtained by those skilled in the art according to the shape of the shade, the longitudinal section corresponding to the longitudinal sectional view may be parallel to the short side direction of the light receiving surface.
In order to more accurately determine an angle between a connecting line between the first edge point of the shielding object and the predetermined point and the light receiving surface, and further ensure that the influence of the shielding object on the received light of the photovoltaic module can be more accurately determined according to the determining device, in another specific embodiment of the present application, the first determining module includes a first calculating submodule, and the first calculating submodule is configured to calculate the first angle according to the height of the shielding object, the width of the shielding object, the first distance, the second distance, and the third distance. According to the determined height of the shielding object, the width of the shielding object, the first distance, the second distance and the third distance, the first included angle can be obtained more accurately. In practical applications, the height and width of the shade are the same for shades having a square longitudinal cross-section.
In order to more accurately determine an included angle between a connecting line between the second edge point of the shielding object and the predetermined point and the light receiving surface, and further ensure that the influence of the shielding object determined by the determining device on the photovoltaic module is more accurate, in another specific embodiment of the present application, the second determining module includes a second calculating submodule, and the second calculating submodule is configured to calculate the second included angle according to the first distance, the second distance, and the third distance. According to the first distance, the second distance and the third distance, the second included angle can be obtained more accurately.
In another specific embodiment of the present application, the influence parameter includes a loss ratio, the loss ratio is a ratio of the light loss angle to a predetermined light angle, the predetermined light angle is an angle of a received light when there is no shielding of the shielding object, and the second determining unit includes a third determining module and a fourth determining module, wherein the third determining module is configured to determine the loss ratio of the predetermined point at least according to the light loss angle of the predetermined point; the fourth determining module is configured to determine the loss ratio of the predetermined area at least according to the loss ratio of the predetermined point. The determining device determines the loss proportion of the predetermined point according to the light loss angle of the predetermined point, and determines the loss proportion of the predetermined area according to the loss proportion of the predetermined point, so that the accurate loss proportion can be obtained efficiently and quickly.
In practical applications, a specific process of calculating the first included angle and the second included angle to obtain the light loss angle is as follows, and fig. 2 shows a two-dimensional cross-sectional view of a photovoltaic module and a shield according to a specific embodiment of the present application, where the cross-sectional view of the shield 101 is a square and is located on a side of a light receiving surface away from the battery cell 103, the predetermined point is denoted by M, the width and height of the shield 101 are denoted by a, the first distance is denoted by H, the second distance is denoted by L, the third distance is denoted by L, and the calculation formulas of the first included angle β and the second included angle γ are as follows:
Figure BDA0002754587780000121
Figure BDA0002754587780000122
then, the above-mentioned light loss angle α is
α＝β-γ
The fourth distance is denoted as L1And the fifth distance is L2The specific process of determining the loss ratio of the predetermined point according to the light loss angle of the predetermined point is as follows:
Figure BDA0002754587780000123
wherein pi is the maximum angle of the received light when the predetermined point M is not shielded by the shielding object.
In an embodiment of the application, the third determining module includes a first obtaining sub-module and a third calculating sub-module, where the first obtaining sub-module is configured to obtain a maximum angle of light received by the predetermined point when there is no shielding of the shielding object; the third calculating submodule is configured to calculate a ratio of a light loss angle of the predetermined point to the maximum angle, and obtain the loss ratio of the predetermined point. By calculating the ratio of the light loss angle of the predetermined point to the maximum angle of the received light when no shielding object is used for shielding, the loss ratio of the predetermined point can be obtained more accurately, and then the influence parameter can be determined accurately.
In order to effectively determine the influence of the shielding object on the received light of the photovoltaic module, according to another specific embodiment of the present application, the third determining module further includes a second obtaining sub-module, the second obtaining sub-module is configured to obtain a fourth distance and a fifth distance, the fourth distance is a minimum distance between the predetermined area and an edge of the light receiving surface in the second direction, the fifth distance is a maximum distance between the predetermined area and a predetermined edge side in the second direction, a projection of the shielding object on the light receiving surface is located between the predetermined edge and the predetermined point, the second direction is perpendicular to the first direction, and the first direction is perpendicular to the light receiving surface.
In another embodiment of the present application, the fourth determining module includes a fourth calculating submodule, and the fourth calculating submodule is configured to calculate the loss ratio of the predetermined area according to the loss ratio of the predetermined point, the fourth distance, and the fifth distance. Calculating the loss ratio of the predetermined area through the loss ratio of the predetermined point, the fourth distance and the fifth distance ensures effective determination of the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module.
In practical applications, two of the light receiving surfaces are a front light receiving surface and a back light receiving surface, and the battery cell is located between the front light receiving surface and the back light receiving surface. By the determination device, the influence of the shielding object on the received light of the front light receiving surface and the back light receiving surface of the double-sided photovoltaic module can be determined.
In a specific embodiment, the shielding object is located on a side of the back light-receiving surface away from the battery unit. The determining device can more accurately determine the influence of the shielding object on the light received by the back light receiving surface of the photovoltaic module.
In a particular embodiment of the present application, the shade comprises a support for supporting the photovoltaic module. By the device, the influence of the bracket of the photovoltaic module on the light receiving surface can be determined.
Of course, in practical applications, the shielding object may be a rectangular parallelepiped, the shielding object may have other shapes, the two-dimensional cross-sectional view corresponding to the shielding object may have other shapes, and the determining device of the present application is also applicable to determining the influence of the shielding object having other shapes on the light received by the light receiving surface of the photovoltaic module.
The determination device for determining the influence of the shade on the photovoltaic module comprises a processor and a memory, wherein the first determination unit 10, the second determination unit 20 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the problem that a method for determining the influence of the obstruction on the received light of the light receiving surface of the photovoltaic component is lacked in the prior art is solved by adjusting the parameters of the kernel.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, where the program, when executed by a processor, implements a method for determining an effect of an obstruction on a photovoltaic module as described above.
The embodiment of the invention provides a processor, which is used for running a program, wherein when the program runs, a method for determining the influence of the shelter on a photovoltaic module is executed.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
a step S101 of determining a light loss angle of a predetermined point on the light receiving surface, the light loss angle being an angle of a light ray that is not received by the shielding of the shielding object;
step S102, determining an influence parameter of the shielding object on a predetermined area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter representing the influence of the shielding object on the received light intensity of the predetermined area.
The processor, when executing the program, may also perform at least the following:
step S201, executing any determination method of the influence of the shelter on the photovoltaic module to obtain an influence parameter of a light receiving surface of the photovoltaic module;
step S202, determining an electric power loss of the photovoltaic module due to the shielding of the shielding object according to the influence parameter of the light receiving surface.
The processor, when executing the program, may also perform at least the following:
step S301, executing any determination method of the influence of the shielding object on the photovoltaic module for multiple times to obtain influence parameters of multiple light receiving surfaces of the shielding object corresponding to different preparation positions;
step S302, comparing the influence parameters of a plurality of light receiving surfaces to obtain a comparison result;
in step S303, the preliminary position corresponding to the smallest influence parameter of the light receiving surface is determined as the attachment position of the shade.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
a step S101 of determining a light loss angle of a predetermined point on the light receiving surface, the light loss angle being an angle of a light ray that is not received by the shielding of the shielding object;
step S102, determining an influence parameter of the shielding object on a predetermined area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter representing the influence of the shielding object on the received light intensity of the predetermined area.
The program adapted to perform initialization may further have at least the following method steps:
step S201, executing any determination method of the influence of the shelter on the photovoltaic module to obtain an influence parameter of a light receiving surface of the photovoltaic module;
step S202, determining an electric power loss of the photovoltaic module due to the shielding of the shielding object according to the influence parameter of the light receiving surface.
The program adapted to perform initialization may further have at least the following method steps:
step S301, executing any determination method of the influence of the shielding object on the photovoltaic module for multiple times to obtain influence parameters of multiple light receiving surfaces of the shielding object corresponding to different preparation positions;
step S302, comparing the influence parameters of a plurality of light receiving surfaces to obtain a comparison result;
in step S303, the preliminary position corresponding to the smallest influence parameter of the light receiving surface is determined as the attachment position of the shade.
In another exemplary embodiment of the present application, there is provided a photovoltaic system, including a photovoltaic module and a device for determining an influence of a blocking object on the photovoltaic module, wherein the photovoltaic module includes a battery cell and a light receiving surface; the device for determining the influence of the shade on the photovoltaic module is used for executing any one of the determination methods.
According to the photovoltaic system, the determining device for determining the influence of the shielding object on the photovoltaic module can accurately determine the influence parameters of the shielding object on the received light of the light receiving surface in the photovoltaic module, and the problem that a method for determining the influence of the shielding object on the received light of the light receiving surface is absent in the prior art is effectively solved.
In practical applications, the photovoltaic module further includes a front substrate and a back substrate, the battery cell is located between the front substrate and the back substrate, a surface of the front substrate away from the battery cell is a front light-receiving surface, and a surface of the back substrate away from the battery cell is a back light-receiving surface. The photovoltaic system may evaluate an influence of the received light on the front light-receiving surface and the back light-receiving surface due to blocking by a blocking object by the determining device.
In a specific embodiment, as shown in fig. 2, the double-sided photovoltaic module includes a front substrate 104 and a back substrate 102, the battery cell 103 is located between the front substrate 104 and the back substrate 102, a surface of the front substrate 104 away from the battery cell is a front illuminated surface, a surface of the back substrate 102 away from the battery cell is a back illuminated surface, the front substrate 104 may be glass, the back substrate 102 may also be glass, the battery cell 103 may be a battery piece, and the shield 101 may be a support of the photovoltaic module. Of course, the front substrate 104 and the rear substrate may be made of other materials, the battery cell 103 may be made of other battery cells, and the shield 101 may be a shield having other shapes.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the method for determining the influence of the shielding object on the photovoltaic module determines parameters of the influence of the shielding object on the received light intensity of the predetermined area of the light receiving surface according to the determined light loss angle of the predetermined point on the light receiving surface, can accurately determine the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module, and effectively solves the problem that a method for determining the influence of the shielding object on the received light of the light receiving surface is absent in the prior art. And, applying the method to the determination method of the power generation amount of the photovoltaic module, the power generation amount of the photovoltaic module can be accurately determined.
2) The method for determining the power generation loss of the photovoltaic module obtains an influence parameter of the light receiving surface of the photovoltaic module by executing the method for determining the influence of the shielding object on the photovoltaic module, and can determine the power loss of the photovoltaic module caused by shielding of the shielding object according to the influence parameter.
3) The method for determining the installation position of the shielding object obtains influence parameters of a plurality of light receiving surfaces of the shielding object corresponding to different preparation positions by executing any method for determining the influence of the shielding object on the photovoltaic module for a plurality of times, and determines the preparation position corresponding to the minimum influence parameter of the light receiving surfaces as the installation position of the shielding object by comparing the influence parameters, so that the shielding object is installed according to the installation position determined by the method, the influence of the shielding object on the light receiving surfaces of the photovoltaic module is small, and the adverse effects of lightening loss and the like of the light receiving surfaces of the photovoltaic module caused by the shielding of the shielding object are effectively relieved.
4) The application also provides a device for determining the influence of the shielding object on the photovoltaic module, and the device for determining the influence of the shielding object on the photovoltaic module determines the light loss angle of the predetermined point on the light receiving surface through the first determining unit and determines the parameter of the influence of the shielding object on the received light intensity of the predetermined area of the light receiving surface through the second determining unit, so that the influence of the shielding object on the received light of the light receiving surface of the photovoltaic module can be more accurately determined, and the problem that a method for determining the influence of the shielding object on the received light of the light receiving surface is absent in the prior art is effectively solved. And, apply to the device of confirming the generating capacity of the photovoltaic module in this device, can confirm the generating capacity of the photovoltaic module accurately.
5) The application also provides a photovoltaic system, and the photovoltaic system can more accurately determine the influence parameters of the shielding object on the received light of the light receiving surface in the photovoltaic module through the determining device of the influence of the shielding object on the photovoltaic module, thereby effectively solving the problem that the prior art lacks a method for determining the influence of the shielding object on the received light of the light receiving surface.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (19)

1. A method of determining an effect of a barrier on a photovoltaic module, the photovoltaic module including a cell and a light-receiving surface, the barrier being located on the light-receiving surface on a side away from the cell, the method comprising:
determining a light loss angle of a predetermined point on the light receiving surface, wherein the light loss angle is an angle of light which cannot be received due to the shielding of the shielding object;
and determining an influence parameter of the shielding object on a preset region of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter for representing the influence of the shielding object on the received light intensity of the preset region.
2. The determination method according to claim 1, wherein determining the light loss angle at a predetermined point on the light receiving surface comprises:
determining an included angle between a connecting line of a first edge point of the shielding object and the predetermined point and the light receiving surface to obtain a first included angle, wherein the first edge point is a point with the largest distance from the light receiving surface in a first direction and a point with the largest distance from a predetermined side edge of the light receiving surface in a second direction, the projection of the shielding object on the light receiving surface is located between the predetermined side edge and the predetermined point, the first direction is perpendicular to the light receiving surface, and the second direction is perpendicular to the first direction;
determining an included angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second included angle, wherein the second edge point is a point which has the smallest distance to the light receiving surface in the first direction and has the smallest distance to the predetermined side edge in the second direction;
and calculating the difference value of the first included angle and the second included angle to obtain the light loss angle.
3. The determination method according to claim 2, wherein before determining the light loss angle at the predetermined point on the light receiving surface, the method further comprises:
obtaining a size parameter of the obstruction, the size parameter comprising: the width of the shielding object, the height of the shielding object, a first distance and a second distance, wherein the first distance is the distance between the second edge point and the light receiving surface in the first direction, and the second distance is the maximum distance between the second edge point and the preset side edge in the second direction;
obtaining a third distance, wherein the third distance is a minimum distance between the predetermined point and the predetermined side edge in the second direction.
4. The determination method according to claim 3,
prior to obtaining the dimensional parameter of the obstruction, and prior to obtaining the third distance, the method further comprises: a longitudinal section of the structure comprising the photovoltaic module and the shade is taken,
obtaining a dimensional parameter of the obstruction, comprising: acquiring the dimension parameters according to the longitudinal section drawing,
obtaining a third distance comprising: and acquiring the third distance according to the longitudinal section diagram.
5. The determination method according to claim 4, wherein a corresponding longitudinal section in the longitudinal sectional view is parallel to a longitudinal direction of the light receiving surface.
6. The determination method according to any one of claims 3 to 5,
determining an included angle between a connecting line of a first edge point of the shielding object and the predetermined point and the light receiving surface to obtain a first included angle, including:
calculating the first included angle according to the height of the shielding object, the width of the shielding object, the first distance, the second distance and the third distance;
determining an included angle between a connecting line of a second edge point of the shielding object and the predetermined point and the light receiving surface to obtain a second included angle, wherein the method comprises the following steps:
and calculating the second included angle according to the first distance, the second distance and the third distance.
7. The determination method according to claim 1 or 2, wherein the influence parameter comprises a loss ratio, the loss ratio being a ratio of the light loss angle to a predetermined light angle, the predetermined light angle being an angle of light received without occlusion by the occlusion,
determining an influence parameter of the obstruction on a predetermined region of the light receiving surface according to the light loss angle, wherein the influence parameter comprises the following steps:
determining the loss proportion of the predetermined point according to at least the light loss angle of the predetermined point;
determining the loss proportion of the predetermined area based at least on the loss proportion of the predetermined point.
8. The method of claim 7, wherein determining the loss ratio of the predetermined point based on the angle of ray loss of the predetermined point comprises:
acquiring the maximum angle of the light received by the predetermined point when the shielding object does not exist;
and calculating the ratio of the light loss angle of the predetermined point to the maximum angle to obtain the loss proportion of the predetermined point.
9. The determination method according to claim 7, wherein before determining the loss proportion of the predetermined area based on at least the loss proportion of the predetermined point, the determination method further comprises:
and acquiring a fourth distance and a fifth distance, wherein the fourth distance is the minimum distance between the predetermined region and the edge of the light receiving surface in the second direction, the fifth distance is the maximum distance between the predetermined region and the predetermined edge side in the second direction, the projection of the shielding object on the light receiving surface is positioned between the predetermined edge and the predetermined point, the second direction is perpendicular to the first direction, and the first direction is perpendicular to the light receiving surface.
10. The method of claim 9, wherein determining the loss ratio of the predetermined area based at least on the loss ratio of the predetermined point comprises:
calculating the loss ratio of the predetermined area according to the loss ratio of the predetermined point, the fourth distance, and the fifth distance.
11. The method according to claim 1, wherein there are two light receiving surfaces, namely a front light receiving surface and a back light receiving surface, the battery cell is located between the front light receiving surface and the back light receiving surface, and the shield is located on a side of the back light receiving surface away from the battery cell.
12. The method of determining according to claim 1, wherein the shade includes a support for supporting the photovoltaic assembly.
13. A method of determining a loss in power generation of a photovoltaic module, comprising:
performing the method according to any one of claims 1 to 12 to obtain an influencing parameter of the light receiving surface of the photovoltaic module;
and determining the electric quantity loss of the photovoltaic module caused by the shielding of the shielding object according to the influence parameters of the light receiving surface.
14. A method of determining the mounting location of a covering, comprising:
performing the method of any one of claims 1 to 12 a plurality of times to obtain influencing parameters of a plurality of light receiving surfaces of the shielding object at different preparation positions;
comparing the influence parameters of the light receiving surfaces to obtain a comparison result;
and determining the preparation position corresponding to the minimum influence parameter of the light receiving surface as the installation position of the shielding object.
15. A device for determining an influence of a shade on a photovoltaic module, the photovoltaic module including a cell and a light-receiving surface, the shade being located on a side of the light-receiving surface away from the cell, the device comprising:
a first determining unit configured to determine a light loss angle of a predetermined point on the light receiving surface, the light loss angle being an angle of a light ray that cannot be received due to occlusion by the occlusion object;
and the second determining unit is used for determining an influence parameter of the shielding object on a preset area of the light receiving surface according to the light loss angle, wherein the influence parameter is a parameter representing the influence of the shielding object on the received light intensity of the preset area.
16. A computer-readable storage medium, characterized in that the storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 12.
17. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the method of any of claims 1 to 14.
18. A photovoltaic system, comprising:
the photovoltaic module comprises a battery unit and a light receiving surface;
device for determining the effect of a shade on a photovoltaic module, for carrying out the determination method according to any one of claims 1 to 12.
19. The pv system of claim 18 wherein the pv module further comprises a front substrate and a back substrate, the cell is positioned between the front substrate and the back substrate, the front substrate has a front-illuminated surface facing away from the cell, and the back substrate has a back-illuminated surface facing away from the cell.
CN202011198172.6A 2020-10-30 2020-10-30 Method and device for determining influence of shelter on photovoltaic module Active CN112272007B (en)

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