CN112926219B - Mismatch loss calculation method, device, equipment and storage medium - Google Patents
Mismatch loss calculation method, device, equipment and storage medium Download PDFInfo
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Abstract
The application discloses a mismatch loss calculation method, a mismatch loss calculation device, mismatch loss calculation equipment and a storage medium. Dividing the back surface of the double-sided assembly to obtain at least one area; the back surface of the double-sided assembly is the surface of the double-sided assembly, which is opposite to the light source; for each region, determining an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state; the mismatch loss of the backside is determined based on the ideal irradiance of each region and the actual irradiance of each region. According to the technical scheme, a new thought is provided for calculating the mismatch loss of the back surface of the double-sided assembly, and meanwhile, through evaluating the shielding influence of the support on the double-sided assembly, the support is provided for the related system design of subsequently improving the generated energy.
Description
Technical Field
The embodiment of the application relates to the technical field of solar energy, in particular to a mismatch loss calculation method, a mismatch loss calculation device, mismatch loss calculation equipment and a storage medium.
Background
Unlike conventional single-sided photovoltaic modules, a double-sided module may be a solar module capable of achieving both front and back power generation. The radiation receiving amount of the back of the double-sided power generation assembly is affected by installation conditions, such as installation height, front-back row spacing, installation inclination angle and ground scene reflectivity, under ideal installation conditions (no support on the back), due to the fact that the view angle coefficients of the ground surface facing different positions of the back of the assembly are different, radiation of the back of the double-sided assembly is unevenly distributed, and under non-ideal conditions, the influence of uneven distribution of the back of the assembly is aggravated due to the shielding influence of supports (such as a bracket and a cement pier) and the like, so that mismatch loss of the back of the double-sided assembly is further enlarged.
In the case of conventional photovoltaic module power generation, back side power generation is also considered, but the back side irradiation of the double-sided module exhibits uneven distribution due to installation conditions, thereby causing mismatch loss. In the prior art, when the mismatch loss of the double-sided power generation assembly is calculated, only the loss of the whole photovoltaic assembly is considered, the back mismatch loss caused by the installation condition of the double-sided assembly is not considered alone, or only the mismatch loss of the double-sided assembly in an ideal installation state is considered, and the mismatch loss caused by a shielding object such as a bracket is not considered.
Disclosure of Invention
The application provides a mismatch loss calculation method, a mismatch loss calculation device, mismatch loss calculation equipment and a storage medium, so as to realize accurate calculation of mismatch loss of the back surface of a double-sided assembly.
In a first aspect, an embodiment of the present application provides a mismatch loss calculation method, including:
dividing the back surface of the double-sided assembly to obtain at least one area; the back surface of the double-sided assembly is the surface of the double-sided assembly, which is opposite to the light source;
for each region, determining an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state;
the mismatch loss of the backside is determined based on the ideal irradiance of each region and the actual irradiance of each region.
In a second aspect, embodiments of the present application further provide a mismatch loss calculation apparatus, including:
the area determining module is used for dividing the back surface of the double-sided assembly to obtain at least one area; the back surface of the double-sided assembly is the surface of the double-sided assembly, which is opposite to the light source;
an irradiance determining module for determining, for each region, an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state;
and the mismatch loss determining module is used for determining the mismatch loss of the back surface according to the ideal irradiance of each region and the actual irradiance of each region.
In a third aspect, an embodiment of the present application further provides an electronic device, including:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement a mismatch loss calculation method as provided by any of the embodiments of the present application.
In a fourth aspect, embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a mismatch loss calculation method as provided by any of the embodiments of the present application.
According to the technical scheme of the embodiment, at least one area is obtained by dividing the back surface of the double-sided assembly, then for each area, the ideal irradiance of the area under the state that the back surface is free of supporters is determined, and the actual irradiance of the area under the state that the back surface is supporters is determined, so that the mismatch loss of the back surface is determined according to the ideal irradiance of each area and the actual irradiance of each area. According to the technical scheme, the actual irradiance in the state that the back surface is provided with the support is introduced, so that calculation of the back surface loss characteristics of the double-sided assembly is more accurate, a new thought is provided for calculation of mismatch loss of the back surface of the double-sided assembly, and meanwhile, the support is provided for the subsequent related system design for improving the generated energy by evaluating the shielding influence of the support on the double-sided assembly.
Drawings
Fig. 1A is a flowchart of a mismatch loss calculation method according to an embodiment of the present application;
FIG. 1B is a schematic view of a dual sided component mounting in a backside unsupported state as provided in one embodiment of the application;
FIG. 1C is a schematic view of a dual-sided component mounting with a back side support provided in accordance with one embodiment of the present application;
fig. 2A is a flowchart of a mismatch loss calculation method according to a second embodiment of the present application;
FIG. 2B is a graph of an ideal irradiance distribution for each region in a backside unsupported state, provided in accordance with a second embodiment of the present application;
FIG. 2C is a graph showing the actual irradiance distribution of each region with a back side support according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a mismatch loss calculating device according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings.
Example 1
Fig. 1A is a flowchart of a mismatch loss calculation method according to an embodiment of the present application; the embodiment is applicable to the situation of calculating the back mismatch loss of the double-sided component, and is particularly applicable to the situation of calculating the back mismatch loss of the double-sided component under the condition that a support is shielded. The method may be performed by a mismatch penalty calculation device, which is implemented in software/hardware and may be integrated in an electronic device, e.g. a server, carrying mismatch penalty calculation functions.
The method shown in fig. 1A specifically includes:
s110, dividing the back surface of the double-sided assembly to obtain at least one area.
Among them, the double-sided module is a module capable of achieving power generation on both sides, such as a solar module. Optionally, the double-sided assembly includes a direct side and a back side. The direct irradiation surface refers to a surface of the double-sided component, which directly faces a light source (namely sunlight) after the double-sided component is arranged at a set position, and can directly receive the irradiation of the sunlight; accordingly, the back surface is the surface of the double-sided assembly opposite to the direct surface, i.e., the surface of the double-sided assembly opposite to the light source after the double-sided assembly is mounted at the set position.
Alternatively, the back surface may be divided according to the component type of the back surface, to obtain at least one area. The module types mainly comprise 5 x 11 formats, 6 x 12 formats, 6 x 10 formats and the like, the arrangement modes of the battery pieces on the back surfaces of the double-sided modules of different module types are different, and the number of the battery pieces is also different. Further, the back surface is divided according to the type of the components on the back surface, and at least one area is obtained by dividing the back surface according to the arrangement mode of the battery pieces on the back surface and/or the number of the battery pieces.
For example, the double-sided assembly may be divided into regions as one unit per each row of the battery cells. Taking a 6 x 12 plate type whole assembly as an example, the back surface can be divided into 13 areas, wherein 12 areas are each row of battery plate units, and the other area is an intermediate junction box area; by this, the 6 x 10 version of the whole assembly is divided into 11 regions.
S120, for each region, determining an ideal irradiance for the region in the back unsupported state, and an actual irradiance for the region in the back supported state.
Wherein irradiance refers to the radiant flux of the surface of the irradiated object in W/m 2 . Irradiance characterizes how much radiant energy is received on the surface illuminated by the radiant energy, i.e., the radiant flux density on the illuminated surface.
In this embodiment, the back surface of the double-sided module faces away from the light source, so the back surface cannot receive direct irradiation of the light source, but can receive irradiation of ground reflected light, air scattered light, and the like. Further, for any area, the ideal irradiance refers to the radiant flux received per unit area of that area after receiving the scattered light irradiation in the atmosphere and the ground reflected light irradiation in the state where the back of the assembly is free of a support; correspondingly, the actual irradiance refers to the radiant flux received per unit area of the area after receiving the scattered light from the atmosphere and the reflected light from the ground with the back of the assembly on the support.
Alternatively, in this embodiment, for each region, the ideal irradiance for that region in the back unsupported state and the actual irradiance for that region in the back supported state may be determined based on the ground scattered reflected irradiance, the ground direct reflected irradiance, and the air scattered irradiance for that region.
Wherein, for each area, the ground scattering reflection irradiance refers to the radiation flux received by the area after the scattered light in the atmosphere reaches the ground and is reflected to the back of the component through the ground; the direct ground reflection irradiance refers to the radiant flux received by the area when the direct light in the atmosphere reaches the ground and then is reflected to the back of the component through the ground; air-scattered irradiance refers to the flux of radiation received by the region when scattered light in the atmosphere is directly incident on the back of the assembly.
For example, a schematic diagram of the double-sided component mounting in a back-side unsupported state is shown in fig. 1B, a schematic diagram of the double-sided component mounting in a back-side supported state is shown in fig. 1C, wherein 1 in fig. 1B and 1C each represents scattered light in the atmosphere directly irradiated to the back side of the double-sided component, 4 in fig. 1B and 1C each represents scattered light in the atmosphere, 2 in fig. 1B and 1C each represents reflected light of the scattered light in the atmosphere reflected to the back side of the double-sided component from the ground, 5 in fig. 1B and 1C each represents direct light in the atmosphere, and 3 in fig. 1B and 1C each represents reflected light of the direct light in the atmosphere reflected to the back side of the double-sided component from the ground.
For each region, the ideal irradiance of the region can be obtained by adding the ideal ground-scattered reflected irradiance, the ideal ground-direct reflected irradiance, and the ideal air-scattered irradiance, in an exemplary back-side unsupported state, and specifically, the ideal irradiance of the region can be determined by the following formula:
G r-i ＝G scattered reflection i +G Direct reflection-i +G Air scattering-i
Wherein G is r-i Ideal irradiance for the ith area of the back of the double-sided component in the non-support shielding state, G Scattered reflection i For the ideal ground scattering reflection irradiance of the ith area of the back surface in the non-support shielding state, G Direct reflection-i For the ideal direct ground reflection irradiance of the ith area of the back surface in the non-support shielding state, G Air scattering-i The ideal air scattering irradiance of the ith area of the back surface in the non-support shielding state is that i is 1,2,3, …, n+1, n is the number of rows of the battery pieces, and n+1 is the total number of areas.
For each region, the actual ground scattered reflected irradiance, the actual ground direct reflected irradiance, and the actual air scattered irradiance of the region are added to obtain the actual irradiance of the region, and specifically, the actual irradiance of the region can be determined by the following formula:
G rz-i ＝G Scattering reflection z-i +G Direct reflection z-i +G Air scattering z-i ，
Wherein G is rz-i For the actual irradiance of the ith area of the back of the double-sided component in the shielding state with the support, G Scattering reflection z-i For the actual ground scattering reflection irradiance of the ith area of the back surface in the shielding state with the support, G Direct reflection z-i For the actual direct reflection irradiance of the ground in the ith area of the back surface in the shielding state with the support, G Air scattering z-i For the actual air-scattered irradiance of the ith area of the back surface in the blocked state with the support, i is 1,2,3, …, n+1, n is the number of rows of the battery cells, and n+1 is the total number of areas.
S130, determining mismatch loss of the back surface according to ideal irradiance of each region and actual irradiance of each region.
The mismatch loss refers to mismatch caused by different illumination of the batteries in the double-sided assembly.
In this embodiment, determining the mismatch loss of the back surface according to the ideal irradiance of each region and the actual irradiance of each region can be divided into the following three steps:
in a first step, the desired power of the back surface in the back surface unsupported state is determined based on the desired irradiance of each region.
First, an ideal open circuit voltage for each region in a backside unsupported state is determined based on the ideal irradiance for each region. Specifically, in the back surface unsupported state, for each region, the ideal open circuit voltage and the ideal photo-generated current of the region may be determined according to the ideal open circuit voltage under standard test conditions, the ideal irradiance of the region, and the like, and for example, the ideal open circuit voltage of the region may be calculated by the following formula:
Wherein V is oc-i An ideal irradiance for the ith region is G r-i Ideal open circuit voltage at that time; v (V) oc-STC Ideal open circuit voltage for a double sided assembly under standard test conditions (standard test condition, STC); i ph-i An ideal irradiance for the ith region is G r-i Ideal photo-generated current at that time; i ph-STC Ideal photo-generated current for a double sided assembly under standard test conditions (standard test condition, STC); k (K) b As an empirical factor, for example 0.0000862; t is the operating temperature of the double sided assembly.
After the ideal open-circuit voltage and the ideal photo-generated current for each region are determined, for each region, the ideal operating voltage and the ideal operating current for that region in the backside unsupported state can be determined from the ideal open-circuit voltage and the ideal photo-generated current for that region. In particular, by means of the photovoltaic module current-voltage equation, an ideal IV curve for this region in the back-side unsupported state can be determined. For example, can be determined by the following formula:
wherein V is i To the ith area in the back unsupported stateIs the ideal operating voltage of I i For an ideal operating current of the ith region in the back unsupported state, I ph-i To generate an ideal photo-generated current in the ith region in the back unsupported state, I 0 Is the reverse saturation current of the diode, B is the diode management ideal factor, V T And Rs is the series resistance of the photovoltaic module.
After determining the ideal operating voltage and ideal operating current for each region, the ideal power of the back surface in the back surface unsupported state may be determined based on the ideal operating voltage and ideal operating current for each region. Specifically, for each region, the IV curves of the region are calculated through a series or parallel structure to obtain the ideal power of the back surface in the back surface unsupported state.
Further, batteries with uneven irradiation distribution in each area of the back surface of the double-sided assembly can be connected in series or in parallel, and under the condition that the assembly loss except the battery electrical property mismatch is not considered, the ideal power of the back surface in the back surface unsupported state can be determined according to the ideal working current and the ideal working voltage of the double-sided assembly after being connected in series or in parallel. The ideal working current of the double-sided assembly after series connection is the minimum working current of the ideal working current of each area after series connection, and the ideal working voltage of the double-sided assembly after series connection is the working voltage corresponding to the ideal working current of each area; the ideal working voltage of the parallel double-sided assembly is the minimum working voltage of the parallel double-sided assembly after the parallel double-sided assembly is connected with the ideal working voltage of each region, and the ideal working current of the parallel double-sided assembly is the working current corresponding to the ideal working voltage of each region to be overlapped. The ideal power for the backside can be determined, for example, by the following formula:
Wherein P is l For ideal power of the back surface in the back surface unsupported state, I is ideal operating current of the series-connected components, V 1 ，V 2 ：，…，V n+1 For the ideal operating voltage of each region, I 1 ，I 2 ，…，I n+1 Is an ideal operating current for each region.
And a second step of determining the actual power of the back surface in the back surface supported state according to the actual irradiance of each region.
First, the actual open circuit voltage and the actual photo-generated current of each region in the supported state on the back surface are determined based on the actual irradiance of each region. Specifically, in the back-side supported state, for each region, the actual open-circuit voltage and the actual photo-generated current of the region may be determined according to the actual open-circuit voltage under standard test conditions, the actual irradiance of the region, and the like, and for example, the actual open-circuit voltage of the region may be calculated by the following formula:
wherein V is ocz-i The actual irradiance for the ith region is G rz-i Actual open circuit voltage at that time; v (V) ocz-STC Is the actual open circuit voltage of the assembly under standard test conditions (standard test condition, STC); i phz-i The actual irradiance for the ith region is G rz-i The actual photo-generated current at that time; i phz-STC Actual photo-generated current for the assembly under standard test conditions (standard test condition, STC); k (K) b As an empirical factor, for example 0.0000862; t is the operating temperature of the assembly.
After determining the actual open circuit voltage of each region, for each region, the actual operating voltage and the actual operating current of the region in the supported state on the back surface can be determined from the actual open circuit voltage and the actual photo-generated current of the region. Specifically, the actual working current of each area in the back supported state can be determined through a photovoltaic module current-voltage equation. For example, can be determined by the following formula:
wherein V is iz To the actual operating voltage of the ith region in the back supported state, I iz For the actual operating current of the ith region in the back-supported state, I phz-i For the actual photo-generated current of the ith region in the back supported state, I 0 Is the reverse saturation current of the diode, B is the diode management ideal factor, V T And Rs is the series resistance of the photovoltaic module.
After determining the actual operating voltage and the actual operating current of each region, the actual power of the rear surface in the supported state of the rear surface may be determined based on the actual operating voltage and the actual operating current of each region. Specifically, for each region, the actual power of the back surface in the back surface supported state is obtained by calculating each IV curve of the region through a series or parallel structure.
Further, batteries with uneven irradiation distribution in each area of the back surface of the double-sided assembly can be connected in series or in parallel, under the condition that assembly losses except for mismatching of the electric performance of the batteries are not considered, the actual power of the back surface in a back surface supporting state can be determined according to the actual working current of the double-sided assembly after being connected in series or in parallel and the actual working voltage of each area, wherein the actual working current of the double-sided assembly after being connected in series is the minimum working current of each area after the actual working current of each area is connected in series, and the actual working voltage of the double-sided assembly after being connected in series is the working voltage corresponding to the actual working current of each area; the actual working voltage of the parallel double-sided assembly is the minimum working voltage of the parallel double-sided assembly after the actual working voltage of each area is parallel, and the actual working current of the parallel double-sided assembly is the working current corresponding to the actual working voltage of each area to be overlapped. The actual power of the back side can be determined, for example, by the following formula:
wherein P is z To the actual power of the back surface in the state of the back surface having a support, I z Is the actual working current of the components after being connected in series, V 1z ，V 2z ：，…，V (n+1)z For the actual operating voltage of each region, I 1z ，I 2z ，…，I (n+1)z Is the actual operating current for each zone.
And thirdly, determining mismatch loss of the back surface according to the ideal power and the actual power.
In this embodiment, the difference between the ideal power and the actual power is determined, and then the result of the difference and the ideal power is taken as the mismatch loss of the back surface, for example, the mismatch loss of the back surface can be determined by the following formula:
wherein P is loss Is the mismatch loss of the backside.
According to the technical scheme of the embodiment, at least one area is obtained by dividing the back surface of the double-sided assembly, then for each area, the ideal irradiance of the area under the state that the back surface is free of supporters is determined, and the actual irradiance of the area under the state that the back surface is supporters is determined, so that the mismatch loss of the back surface is determined according to the ideal irradiance of each area and the actual irradiance of each area. According to the technical scheme, the actual irradiance in the state that the back surface is provided with the support is introduced, so that calculation of the back surface loss characteristics of the double-sided assembly is more accurate, a new thought is provided for calculation of mismatch loss of the back surface of the double-sided assembly, and meanwhile, through evaluation of shielding influence of the support on the double-sided assembly, support is provided for subsequent improvement of the power generation capacity related system design.
Example two
Fig. 2A is a flowchart of a mismatch loss calculation method according to a second embodiment of the present application; based on the above embodiments, a detailed description is given of a method for determining, for each region, an ideal irradiance of the region in a back-side unsupported state, and an actual irradiance of the region in a back-side supported state, as shown in fig. 2A, and the method may specifically include:
and S210, dividing the back surface of the double-sided assembly to obtain at least one area.
S220, for each region, determining an ideal irradiance for the region in the back unsupported state based on the ground scattered reflected irradiance, the ground direct reflected irradiance, and the air scattered irradiance for the region.
In this embodiment, for each region, determining the ideal irradiance for that region in the back unsupported state can be divided into the following four steps:
in a first step, an ideal floor-scattering reflected irradiance of the area in a back-side unsupported state is determined based on the horizontal-scattering irradiance, the floor reflectivity, and the viewing angle coefficient of the ideal floor scattering of the area. The view angle coefficient of ideal ground scattering refers to the view angle coefficient of the light rays reaching each area on the back of the double-sided assembly in the ground scattering area, and the view angle coefficients of ideal ground scattering in different areas are different. The horizontal scattered radiation and the ground reflectivity of each region were the same.
Optionally, the data collected by the relevant devices may be used to determine the horizontal scattering irradiance and the ground reflectivity; and the ideal ground scattering viewing angle coefficient of the area can be determined according to the area of the reflection area of the ground scattering area, the area of the area, the included angle between the normal line of the ground area and the connecting line of the back surface of the double-sided component, the included angle between the normal line of the back surface of the double-sided component and the connecting line of the ground, and the distance from the ground to the back surface of the double-sided component, for example, the ideal ground scattering viewing angle coefficient can be determined by the following formula:
wherein VF Scattered reflection i View angle coefficient for ideal ground scattering, A 1 scattering region-i The area of the reflecting area for reflecting the light of the ground scattering area to the ith area, A 2-i For the area of the ith region, θ 1 Included angle between normal line of ground area and back line of double-sided assembly, theta 2 And r is the distance from the ground to the back of the double-sided component, which is the included angle between the normal line of the back of the double-sided component and the connecting line of the ground.
After determining the horizontal scatter irradiance, the ground reflectivity, and the viewing angle coefficient of the ideal ground scatter for the area, the result of multiplying the horizontal scatter irradiance, the ground reflectivity, and the viewing angle coefficient of the ideal ground scatter for the area is used as the ideal ground scatter reflection irradiance for the area in the back unsupported state, for example, the ideal ground scatter reflection irradiance for the area can be determined by the following formula:
G Scattered reflection i ＝VF Scattered reflection i *DHI*ρ
Wherein G is Scattered reflection i For ideal ground scattering reflection irradiance of the ith area of the back surface in the non-support shielding state, ρ is ground reflectivity, and DHI is horizontal scattering irradiation.
And a second step of determining the ideal direct ground reflection irradiance of the area in the back unsupported state based on the horizontal scattered radiation, the horizontal total radiation, the ground reflectivity, and the viewing angle coefficient of the ideal direct ground of the area. The ideal direct ground view angle coefficient refers to the view angle coefficient that light rays in the direct ground view area reach each area on the back of the double-sided assembly, and the ideal direct ground view angle coefficients in different areas are different. The horizontal scattered radiation, the horizontal total radiation, and the ground reflectivity are the same for each region.
Alternatively, the horizontal scatter irradiance and the ground reflectivity may be determined in the manner described in the first step, and will not be described in detail herein; the data collected by the relevant equipment can be used for determining the level total irradiation; and the ideal direct ground view angle coefficient of the area can be determined according to the area of the reflection area of the direct ground view area reflected to the area, the area of the area, the included angle between the normal line of the area and the back line of the double-sided component, the included angle between the normal line of the back of the double-sided component and the back line of the double-sided component, and the distance from the ground to the back of the double-sided component, for example, the ideal direct ground view angle coefficient can be determined by the following formula:
Wherein A is 1 direct incidence area-i The light rays that are the direct ground area are reflected to the reflective area of the ith area.
After determining the horizontal scattered radiation, the horizontal total radiation, the ground reflectivity, and the viewing angle coefficient of the ideal direct ground for the area, the result of subtracting the horizontal scattered radiation from the horizontal total radiation, the ground reflectivity, and the viewing angle coefficient of the ideal direct ground are multiplied, and as the ideal direct ground reflection irradiance for the area in the back-side unsupported state, the ideal direct ground reflection irradiance for the area can be determined, for example, by the following formula:
G direct reflection-i ＝VF Direct reflection-i *(GHI-DHI)*ρ
Wherein G is Direct reflection-i For ideal direct ground reflection irradiance of the ith area of the back surface in the unsupported shielding state, GHI is the horizontal total irradiance.
Third, determining the ideal air-scattered irradiance of the area in the back unsupported state based on the horizontal direct irradiation, the total horizontal outside atmosphere irradiation, the mounting tilt angle of the double-sided assembly, the area width of the area, and the spacing of the ideal reflective areas. The distance between ideal reflection areas refers to the distance between the light rays reaching the bright area formed by the ground and the bright area formed between the two rows of components, and the distance can be obtained through actual measurement. The horizontal direct irradiation, the total horizontal irradiation outside the atmosphere, and the installation inclination angles of the double-sided assemblies are the same for each region.
Firstly, determining total external level irradiation, which can be determined according to sunrise or sunset time angle, date sequence number, latitude and declination angle, for example, the following formula can be used for determining the total external level irradiation:
wherein H is 0 Is total irradiation of the outside atmosphere level, n is a date number,is latitude, delta is declination angle, omega s Is the sunrise/sunset time angle.
The first coefficient of the ideal air-scattering irradiance is determined according to the horizontal direct irradiation and the total external atmospheric level irradiation, specifically, the ratio of the horizontal direct irradiation to the total external atmospheric level irradiation can be used as the first coefficient of the ideal air-scattering irradiance, for example, the first coefficient of the ideal air-scattering irradiance can be determined by the following formula:
after determining the first coefficient of ideal air-scattered irradiance, the ideal air-scattered irradiance of the area in the back-side unsupported state is determined based on the horizontal scattered irradiance value, the mounting tilt angle of the duplex assembly, the area width of the area, and the spacing of the ideal reflective areas, for example, the ideal air-scattered irradiance of the area may be determined by:
wherein G is Air scattering-i Ideal air-scattering irradiance of the ith region of the back surface in the unsupported shadowed state, I d Horizontal scattering irradiation value, a is the installation inclination angle of the double-sided component, d i Region width s of the ith region i Is the spacing of the ideal reflective regions for the ith region.
Fourth, determining the ideal irradiance of the area in the back unsupported state based on the ideal ground diffuse reflected irradiance, the ideal ground direct reflected irradiance, and the ideal air diffuse irradiance. Specifically, the result of adding the ideal ground-scattered reflected irradiance, the ideal ground-direct reflected irradiance, and the ideal air-scattered irradiance is taken as the ideal irradiance for the area in the back-side unsupported state.
S230, for each region, determining the actual irradiance of the region in the state of the back support according to the ground scattered reflection irradiance, the ground direct reflection irradiance and the air scattered irradiance of the region.
In this embodiment, for each region, determining the actual irradiance of the region with the support on the back surface according to the ground scattered reflected irradiance, the ground direct reflected irradiance, and the air scattered irradiance of the region can be divided into the following four steps:
in a first step, the actual ground-scattering reflected irradiance of the area with the support on the back is determined based on the horizontal scattered radiation, the ground reflectivity, the viewing angle coefficient of the ideal ground scattering of the area, and the viewing angle coefficient of the actual ground scattering of the area. The view angle coefficient of actual ground scattering refers to the view angle coefficient of the ground scattering area reaching each area on the back of the double-sided assembly in the state that the back is provided with a supporting object, and the view angle coefficients of the actual ground scattering in different areas are different. The horizontal scattering irradiation and the ground reflectivity of each region were the same.
Specifically, first, the horizontal scattering irradiance and the ground reflectivity are determined, and the horizontal scattering irradiance and the ground reflectivity can be determined by using the data collected by the related equipment.
Further, the actual coefficient of the actual ground scattering in the area may be determined, specifically, the viewing angle coefficient of the actual ground scattering in the area may be determined according to the area of the area where the light in the ground scattering area is reflected to the support, the area of the support, the included angle between the normal line of the ground area and the back line of the double-sided component, the included angle between the normal line of the back surface of the double-sided component and the ground line, and the distance between the ground and the back surface of the double-sided component, for example, the viewing angle coefficient of the actual ground scattering may be determined by:
wherein VF Scattering reflection z-i View angle coefficient for actual ground scattering, A 1 scattering region support The light of the ground scattering area is reflected to the area of the support, A 2-support For supporting the object area, θ 1 Included angle between normal line of ground area and back line of double-sided assembly, theta 2 And r is the distance from the ground to the back of the double-sided component, which is the included angle between the normal line of the back of the double-sided component and the connecting line of the ground.
After determining the horizontal scattering irradiation, the ground reflectivity, and the viewing angle coefficient of the actual ground scattering of the area, determining the actual ground scattering reflection irradiance of the area in the state of having the support on the back according to the horizontal scattering irradiation, the ground reflectivity, the viewing angle coefficient of the actual ground scattering of the area, and the viewing angle coefficient of the ideal ground scattering of the area, wherein the determination mode of the viewing angle coefficient of the ideal ground scattering is the same as the determination mode in S220, and will not be repeated here. Specifically, the result of the difference between the viewing angle coefficient of the ideal ground scattering and the viewing angle coefficient of the actual ground scattering is the product of the horizontal scattering irradiation and the ground reflectivity, and is used as the actual ground scattering reflection irradiance of the area. The actual ground-scattering reflected irradiance of the area can be determined, for example, by the following formula:
G Scattering reflection z-i ＝(VF Scattered reflection i -VF Scattering reflection z-i )*DHI*ρ
Wherein G is Scattering reflection z-i For the actual ground scattering reflection irradiance of the ith area of the back surface in the shielded state with the support, VF Scattered reflection i The view angle coefficient of ideal ground scattering is ρ, ground reflectivity, and DHI is horizontal scattering irradiation.
And a second step of determining the actual direct ground reflection irradiance of the area in the state of the back surface having the support based on the horizontal scattered radiation, the horizontal total radiation and the ground reflectivity, the angle of view coefficient of the ideal direct ground incidence of the area, and the angle of view coefficient of the actual direct ground incidence of the area. The view angle coefficient of the actual ground direct incidence refers to the view angle coefficient of the ground direct incidence area reaching each area of the back surface of the double-sided component in the state that the back surface is provided with a supporting object, and the view angle coefficients of the actual ground direct incidence in different areas are different. The horizontal scattered radiation, the horizontal total radiation, and the ground reflectivity are the same for each region.
Specifically, the horizontal scattering radiation, the ground reflectivity and the horizontal total radiation are determined first, and the specific determination mode is the same as that in S220, and will not be described here again.
Further, the viewing angle coefficient of the actual direct ground in the area may be determined specifically by determining the viewing angle coefficient of the actual direct ground in the area according to the area of the reflective area where the light in the direct ground area is reflected to the support, the area of the support, the angle between the normal line of the ground area and the line connecting the back of the double-sided component, the angle between the normal line of the back of the double-sided component and the line connecting the ground, and the distance between the ground and the back of the double-sided component, for example, the viewing angle coefficient of the actual direct ground in the area may be determined by the following formula:
Wherein VF is reflected directly z-i A is the view angle coefficient of the actual ground direct incidence of the ith area, A 1 direct projection area-bracket The light of the direct ground area is reflected to the reflecting area of the support, A 2-support For supporting the object area, θ 1 Included angle between normal line of ground area and back line of double-sided assembly, theta 2 And r is the distance from the ground to the back of the double-sided component, which is the included angle between the normal line of the back of the double-sided component and the connecting line of the ground.
After determining the horizontal scatter irradiance, the horizontal total irradiance, the ground reflectivity of the area, and the viewing angle coefficient of the actual ground direct of the area, determining the actual ground direct reflected irradiance of the area based on the horizontal scatter irradiance, the horizontal total irradiance, the ground reflectivity, and the viewing angle coefficient of the actual ground direct of the area, and the viewing angle coefficient of the ideal ground direct of the area. Specifically, as the result of multiplying the result of subtracting the horizontal scattered radiation from the horizontal total radiation, the result of subtracting the viewing angle coefficient of the actual direct ground radiation from the viewing angle coefficient of the ideal direct ground radiation, and the result of multiplying the ground reflectivity, the actual direct ground radiation reflection irradiance of the area in the state of the support on the back surface can be determined, for example, by the following formula:
G Direct reflection z-i ＝(VF Direct reflection-i -VF Direct reflection z-i )*(GHI-DHI)*ρ
Wherein G is Direct reflection z-i For the actual direct ground reflection irradiance of the ith area of the back surface in the shielding state with the support, ρ is ground reflectivity, DHI is horizontal scattered radiation, and GHI is horizontal total radiation.
And thirdly, determining the actual air scattering irradiance of the area under the state of the support on the back surface according to the horizontal direct irradiation, the external horizontal total irradiation of the atmosphere, the installation inclination angle of the double-sided assembly, the width of the area, the spacing of ideal reflection areas, the width of the support and the spacing of actual reflection areas. The distance between the actual reflection areas refers to the distance between the light ray reaching the bright area formed by the ground and the bright area formed between the two rows of components in the state that the back surface is blocked by the support, and the distance can be obtained through actual measurement. With specific reference to the manner in which the ideal air-scattered irradiance is determined in S220, the actual air-scattered irradiance may be determined, for example, by:
wherein G is Air scattering z-i For the actual air-scattered irradiance of the ith zone of the back surface in the shielded state with the support, s iz D is the spacing of the actual reflective regions z Is the width of the support.
Fourth, determining the actual irradiance of the area in the back-supported condition based on the actual ground diffuse reflected irradiance, the actual ground direct reflected irradiance, and the actual air diffuse irradiance.
S240, determining mismatch loss of the back surface according to the ideal irradiance of each region and the actual irradiance of each region.
According to the technical scheme of the embodiment, for each area, the calculation mode of the ideal irradiance of the area under the state that the back surface is free of the support and the actual irradiance of the area under the state that the back surface is provided with the support is elaborated, so that the mismatch loss calculation of the back surface of the double-sided assembly is more accurate.
On the basis of the above-described embodiment, the ideal irradiance of each region in the back-side unsupported state and the actual irradiance of each region in the back-side supported state were simulated, respectively, as shown in fig. 2B for each region in the back-side unsupported state and fig. 2C for each region in the back-side supported state.
Further, in a certain region, the back mismatch loss of the double-sided module in the shielding state of the support is simulated by weather data, the result is related to conditions such as installation height, spacing, module width, ground reflectivity, weather data, and the like, the installation inclination angle of the double-sided module is 25 degrees, the spacing between the actual reflection areas is 3.5m, the distance from the ground to the back of the double-sided module is 1m, the ground reflectivity is 0.2, the simulation result of the double-sided module annual mismatch loss is shown in table 1, d is the support width, s is the spacing between the actual reflection areas, and for example, when the support width is 100mm and the spacing between the actual reflection areas is 70mm, the result of the double-sided module annual mismatch loss is 7.4%.
Also taking 1V as an example, in a certain area, weather data is used to simulate back mismatch loss of a double-sided assembly in a support shielding state and at different mounting heights, wherein the mounting inclination angle of the double-sided assembly is 25 °, the pitch of an actual reflection area is 3.5m, the ground reflectivity is 0.2, d is the support width, s is the pitch of the actual reflection area, and one-year mismatch loss simulation results H1 and H2 are as shown in table 2 when the mounting heights are 05m and 1m, for example, when the support width is 100mm and the pitch of the actual reflection area is 70mm, the one-year mismatch loss is 9.5% when the mounting height is 0.5m, and the one-year mismatch loss is 7.4% when the mounting height is 1 m.
TABLE 1 simulation results for a region
TABLE 2 simulation results at different heights
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Example III
Fig. 3 is a schematic structural diagram of a mismatch loss calculating device according to a third embodiment of the present application; the embodiment is applicable to the situation of calculating the back mismatch loss of the double-sided component, and is particularly applicable to the situation of calculating the back mismatch loss of the double-sided component under the condition that a support is shielded. The apparatus is implemented in software/hardware and may be integrated in an electronic device, such as a server, carrying mismatch penalty calculation functionality.
As shown in fig. 3, the apparatus includes a region determination module 310, an irradiance determination module 320, and a mismatch loss determination module 330, wherein,
The area determining module 310 is configured to divide the back surface of the double-sided component to obtain at least one area; the back surface of the double-sided component is the surface of the double-sided component, which is opposite to the light source;
an irradiance determining module 320 for determining, for each region, an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state;
the mismatch loss determination module 330 is configured to determine a mismatch loss of the back surface according to the ideal irradiance of each region and the actual irradiance of each region.
According to the technical scheme of the embodiment, at least one area is obtained by dividing the back surface of the double-sided assembly, then for each area, the ideal irradiance of the area under the state that the back surface is free of supporters is determined, and the actual irradiance of the area under the state that the back surface is supporters is determined, so that the mismatch loss of the back surface is determined according to the ideal irradiance of each area and the actual irradiance of each area. According to the technical scheme, the actual irradiance in the state that the back surface is provided with the support is introduced, so that calculation of the back surface loss characteristics of the double-sided assembly is more accurate, a new thought is provided for calculation of mismatch loss of the back surface of the double-sided assembly, and meanwhile, the support is provided for the subsequent related system design for improving the generated energy by evaluating the shielding influence of the support on the double-sided assembly.
Further, the area determining module 310 specifically is configured to:
and dividing the back surface according to the component type of the back surface to obtain at least one region.
Further, the irradiance determining module 320 includes an irradiance determining unit configured to:
for each region, determining an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state based on the ground scattered reflected irradiance, the ground direct reflected irradiance, and the air scattered irradiance for the region.
Further, the irradiance determining unit comprises a first ideal irradiance determining sub-unit, a second ideal irradiance determining sub-unit, a third ideal irradiance determining sub-unit, and an ideal irradiance determining sub-unit, wherein,
a first ideal irradiance determining sub-unit for determining an ideal ground scattering reflected irradiance of the area in a backside unsupported state based on the horizontal scattering irradiance, the ground reflectivity, and a viewing angle coefficient of the ideal ground scattering of the area;
a second ideal irradiance determining sub-unit for determining an ideal direct ground reflection irradiance of the area in a backside unsupported state based on the horizontal scattered radiation, the horizontal total radiation, the ground reflectivity, and a viewing angle coefficient of the ideal direct ground of the area;
A third ideal irradiance determining sub-unit for determining an ideal air-scattering irradiance of the area in a backside unsupported state based on the horizontal direct irradiation, the total outside-the-atmosphere horizontal irradiation, the mounting inclination of the double-sided assembly, the area width of the area, and the spacing of the ideal reflection area;
an ideal irradiance determining subunit for determining an ideal irradiance of the area in the back unsupported state based on the ideal ground diffuse reflected irradiance, the ideal ground direct reflected irradiance, and the ideal air diffuse irradiance.
Further, the irradiance determining unit further comprises a first actual irradiance determining subunit, a second actual irradiance determining subunit, a third actual irradiance determining subunit, and an actual irradiance determining subunit, wherein,
a first actual irradiance determining subunit for determining an actual ground-scattering reflected irradiance of the area with the support on the back, based on the horizontal scatter irradiance, the ground reflectivity, the viewing angle coefficient of an ideal ground scattering of the area, and the viewing angle coefficient of an actual ground scattering of the area;
a second actual irradiance determining sub-unit for determining an actual direct ground reflection irradiance of the area in a state where the back surface has a support, based on the horizontal scattered radiation, the horizontal total radiation, and the ground reflectivity, a viewing angle coefficient of an ideal direct ground of the area, and a viewing angle coefficient of an actual direct ground of the area;
A third actual irradiance determining subunit configured to determine an actual air-scattered irradiance of the area in a state where the back surface has the support, based on the horizontal direct irradiation, the total atmospheric horizontal irradiation, the installation inclination of the double-sided assembly, the area width of the area, the pitch of the ideal reflective area of the area, the support width, and the pitch of the actual reflective area of the area;
an actual irradiance determining subunit for determining an actual irradiance of the area with the support on the back based on the actual ground diffuse reflected irradiance, the actual ground direct reflected irradiance, and the actual air diffuse irradiance.
Further, the mismatch loss determination module 330 includes an ideal power determination unit, an actual power determination unit, and a mismatch loss determination unit, wherein,
an ideal power determining unit for determining an ideal power of the back surface in a back surface unsupported state based on the ideal irradiance of each region;
an actual power determining unit for determining the actual power of the back surface in a state where the back surface has a support, based on the actual irradiance of each region;
and the mismatch loss determining unit is used for determining the mismatch loss of the back surface according to the ideal power and the actual power.
The mismatch loss calculation device can execute the mismatch loss calculation method provided by any embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 4 is a schematic structural diagram of an electronic device provided in a fourth embodiment of the present application, and fig. 4 is a block diagram of an exemplary device suitable for implementing the embodiments of the present application. The device shown in fig. 4 is only an example and should not be construed as limiting the functionality and scope of use of the embodiments herein.
As shown in fig. 4, the electronic device 12 is in the form of a general purpose computing device. Components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include Industry Standard Architecture (ISA) bus, micro channel architecture (MAC) bus, enhanced ISA bus, video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.
Electronic device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by electronic device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and/or cache memory 32. The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, commonly referred to as a "hard disk drive"). Although not shown in fig. 4, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the embodiments of the present application.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods in the embodiments described herein.
The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the electronic device 12, and/or any devices (e.g., network card, modem, etc.) that enable the electronic device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Also, the electronic device 12 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 over the bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the mismatch penalty calculation method provided by the embodiments of the present application.
Example five
The fifth embodiment of the present application also provides a computer-readable storage medium having stored thereon a computer program (or referred to as computer-executable instructions) for performing the mismatch penalty calculation method provided by the embodiments of the present application when executed by a processor.
Any combination of one or more computer readable media may be employed as the computer storage media of the embodiments herein. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for embodiments of the present application may be written in one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of numerous obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the present application. Therefore, while the embodiments of the present application have been described in considerable detail with reference to the foregoing embodiments, the embodiments of the present application are not limited to the foregoing embodiments, but can include other equivalent embodiments without departing from the spirit of the present application, the scope of which is defined by the scope of the appended claims.
Claims (7)
1. A mismatch loss calculation method, comprising:
dividing the back surface of the double-sided assembly to obtain at least one area; the back surface of the double-sided assembly is the surface of the double-sided assembly, which is opposite to the light source;
for each region, determining an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state;
determining a mismatch loss for the backside based on the ideal irradiance for each region and the actual irradiance for each region;
The determining, for each region, an ideal irradiance for that region in the back unsupported state and an actual irradiance for that region in the back supported state, comprising:
for each region, determining an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state based on the ground scattered reflected irradiance, the ground direct reflected irradiance, and the air scattered irradiance for the region;
determining an actual irradiance of the area with the back support based on the ground-scattered reflected irradiance, the ground-direct reflected irradiance, and the air-scattered irradiance of the area, comprising:
determining an actual ground-scattering reflected irradiance of the area with the support on the back surface based on the horizontal scattered radiation, the ground reflectivity, the viewing angle coefficient of the ideal ground scattering of the area, and the viewing angle coefficient of the actual ground scattering of the area; the view angle coefficients of the actual ground scattering are the view angle coefficients of the ground scattering areas reaching all areas on the back surface of the double-sided assembly in the state that the back surface is provided with a supporting object, and the view angle coefficients of the actual ground scattering in different areas are different;
Determining an actual direct ground reflection irradiance of the area with the back surface having a support based on the horizontal scatter irradiance, the horizontal total irradiance and the ground reflectivity, the angle of view of the ideal direct ground of the area, and the angle of view of the actual direct ground of the area; the viewing angle coefficients of the actual ground direct incidence refer to the viewing angle coefficients of the ground direct incidence areas reaching all areas on the back surface of the double-sided assembly in the state that the back surface is provided with a supporting object, and the viewing angle coefficients of the actual ground direct incidence in different areas are different;
determining the actual air scattering irradiance of the area under the state of the back surface with the support according to the horizontal direct irradiation, the external horizontal total irradiation of the atmosphere, the installation inclination angle of the double-sided component, the area width of the area, the interval of the ideal reflection area of the area, the width of the support and the interval of the actual reflection area of the area;
determining an actual irradiance of the area with the support on the back surface based on the actual ground diffuse reflected irradiance, the actual ground direct reflected irradiance, and the actual air diffuse irradiance.
2. The method of claim 1, wherein dividing the back side of the double-sided assembly to obtain at least one region comprises:
And dividing the back surface according to the component type of the back surface to obtain at least one region.
3. The method of claim 1, wherein determining the ideal irradiance for the area in the back unsupported state based on the ground-scattered reflected irradiance, the ground-direct reflected irradiance, and the air-scattered irradiance for the area comprises:
determining an ideal ground-scattering reflected irradiance for the area in the back unsupported state based on the horizontal scattered radiation, the ground reflectivity, and the viewing angle coefficient for the ideal ground scattering for the area;
determining an ideal direct ground reflection irradiance for the area in the back unsupported state based on the horizontal scatter irradiance, the horizontal total irradiance, the ground reflectivity, and a viewing angle coefficient for the ideal direct ground for the area;
determining an ideal air-scattering irradiance of the area in the back unsupported state based on the horizontal direct irradiance, the total atmospheric horizontal irradiance, the mounting tilt angle of the double-sided assembly, the area width of the area, and the spacing of the ideal reflective area;
determining an ideal irradiance for the area in the back unsupported state based on the ideal ground scattered reflected irradiance, the ideal ground direct reflected irradiance, and the ideal air scattered irradiance.
4. The method of claim 1, wherein determining the mismatch loss for the backside based on the ideal irradiance for each region and the actual irradiance for each region comprises:
determining an ideal power of the back surface in the back surface unsupported state based on the ideal irradiance of each region;
determining the actual power of the back surface in the back surface supported state according to the actual irradiance of each region;
and determining the mismatch loss of the back surface according to the ideal power and the actual power.
5. A mismatch loss calculation apparatus, comprising:
the area determining module is used for dividing the back surface of the double-sided assembly to obtain at least one area; the back surface of the double-sided assembly is the surface of the double-sided assembly, which is opposite to the light source;
an irradiance determining module for determining, for each region, an ideal irradiance for the region in the back unsupported state and an actual irradiance for the region in the back supported state;
the mismatch loss determining module is used for determining the mismatch loss of the back surface according to the ideal irradiance of each region and the actual irradiance of each region;
The irradiance determining module is specifically configured to determine, for each region, an ideal irradiance of the region in the back-side unsupported state and an actual irradiance of the region in the back-side supported state according to a ground scattered reflected irradiance, a ground direct reflected irradiance, and an air scattered irradiance of the region;
the irradiance determination module includes:
a first actual irradiance determining subunit configured to determine an actual ground-scattering reflected irradiance of the area in the back-supported state based on the horizontal scatter irradiance, the ground reflectivity, the viewing angle coefficient of an ideal ground scatter of the area, and the viewing angle coefficient of an actual ground scatter of the area; the view angle coefficients of the actual ground scattering are the view angle coefficients of the ground scattering areas reaching all areas on the back surface of the double-sided assembly in the state that the back surface is provided with a supporting object, and the view angle coefficients of the actual ground scattering in different areas are different;
a second actual irradiance determining sub-unit for determining an actual direct ground reflection irradiance of the area in the back side support-bearing state based on the horizontal scatter irradiance, the horizontal total irradiance and the ground reflectivity, the viewing angle coefficient of the ideal direct ground of the area, and the viewing angle coefficient of the actual direct ground of the area; the viewing angle coefficients of the actual ground direct incidence refer to the viewing angle coefficients of the ground direct incidence areas reaching all areas on the back surface of the double-sided assembly in the state that the back surface is provided with a supporting object, and the viewing angle coefficients of the actual ground direct incidence in different areas are different;
A third actual irradiance determining subunit configured to determine an actual air-scattered irradiance of the area in the back-supported state based on the horizontal direct irradiation, the total atmospheric horizontal irradiation, the installation tilt angle of the double-sided assembly, the area width of the area, the spacing of the ideal reflective areas of the area, the support width, and the spacing of the actual reflective areas of the area;
an actual irradiance determining subunit for determining an actual irradiance of the area with the support on the back based on the actual ground diffuse reflected irradiance, the actual ground direct reflected irradiance, and the actual air diffuse irradiance.
6. An electronic device, comprising:
one or more processors;
a memory for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the mismatch penalty calculation method of any of claims 1-4.
7. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements a mismatch loss calculation method according to any of claims 1-4.
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| CN109150108A (en) * | 2018-08-15 | 2019-01-04 | 河海大学常州校区 | A method of calculating two-sided photovoltaic component back plate average lamp |
| CN110110481A (en) * | 2019-05-21 | 2019-08-09 | 河海大学常州校区 | A method of calculating two-sided photovoltaic component mismatch power loss |
| CN110334443A (en) * | 2019-07-05 | 2019-10-15 | 天合光能股份有限公司 | A method of calculating two-sided photovoltaic module backside mismatch loss |
| CN212392859U (en) * | 2020-09-18 | 2021-01-22 | 广州中旭新能源有限公司 | Two-sided photovoltaic module of regional optimization and power generation system thereof |
| CN112541152A (en) * | 2020-10-10 | 2021-03-23 | 天合光能股份有限公司 | Method for calculating working temperature of double-sided photovoltaic module |
| CN112272007A (en) * | 2020-10-30 | 2021-01-26 | 合肥阳光新能源科技有限公司 | Method and device for determining influence of shelter on photovoltaic module |
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