CN112737505A - Correction coefficient estimation method and system for scattered radiation measuring device - Google Patents
Correction coefficient estimation method and system for scattered radiation measuring device Download PDFInfo
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- 238000012937 correction Methods 0.000 title claims abstract description 52
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- 238000005259 measurement Methods 0.000 claims abstract description 102
- 238000004088 simulation Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 4
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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
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- H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a method and a system for estimating a correction coefficient of a scattered radiation measuring device, wherein the method for estimating the correction coefficient of the scattered radiation measuring device comprises the following main processes: establishing a first measurement model with a shading ring and a second measurement model without the shading ring; the method comprises the steps that a photovoltaic assembly replaces a total radiation meter to serve as a measurement target, and a first effective radiation quantity of a first measurement model and a second effective radiation quantity of a second measurement model are obtained; acquiring a correction coefficient, wherein the correction coefficient is the ratio of the second effective radiation amount to the first effective radiation amount; effective radiant quantities of a first measurement model with a shading ring and a second measurement model without the shading ring are measured respectively, so that a correction coefficient is obtained, the first effective radiant quantity is corrected, accuracy and reliability of test data are improved, accurate data support of a photovoltaic module in actual installation is guaranteed, generated energy is improved, and the scheme is simple, reliable and greatly reduces measurement cost.
Description
Technical Field
The invention relates to the technical field of photovoltaic prediction, in particular to a method and a system for estimating a correction coefficient of a scattered radiation measuring device.
Background
The existing scattered radiation is mainly measured by a scattered radiation measuring device with a shading ring and a shading ball type full-automatic solar tracker, although the shading ball type full-automatic solar tracker has high measurement precision, the cost is high, the stability and the reliability are poor, when the scattered radiation measuring device with the shading ring is used, because the shading ring can simultaneously shade direct solar radiation and sky scattering on the shading ring, the test data is smaller than the actual data, the test data must be multiplied by a shading ring correction coefficient to obtain accurate scattered radiation, the correction coefficient is related to the geometric dimension of the shading ring, the geographic position and the season of an observation point, and the influence of weather conditions is large, so that the accurate correction coefficient is difficult to obtain.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, an object of the present invention is to provide a method for estimating a correction coefficient of a scattered radiation measuring apparatus, which can accurately obtain a correction coefficient of a light-shielding ring and improve accuracy of test data.
In order to achieve the purpose, the invention adopts the following technical scheme:
a scattered radiation measuring device correction coefficient estimation method comprises a total radiometer and a shading ring, and specifically comprises the following steps:
establishing a first measurement model with a shading ring and a second measurement model without the shading ring;
the method comprises the steps that a photovoltaic assembly replaces a total radiation meter to serve as a measurement target, and a first effective radiation quantity of a first measurement model and a second effective radiation quantity of a second measurement model are obtained;
and acquiring a correction coefficient, wherein the correction coefficient is the ratio of the second effective radiation amount to the first effective radiation amount.
In the method for estimating correction coefficients of a scattered radiation measuring device, the establishing of a first measurement model with a shading ring and a second measurement model without the shading ring specifically includes: a first measurement model with the shading ring and a second measurement model without the shading ring were established by Sketchup software.
In the method for estimating correction coefficients of a scattered radiation measuring device, the photovoltaic module is used as a measurement target instead of a total radiation meter, and a first effective radiation amount of a first measurement model and a second effective radiation amount of a second measurement model are obtained, specifically: and acquiring a first effective radiation quantity of the first measurement model and a second effective radiation quantity of the second measurement model through PVsyst software.
In the method for estimating correction coefficients of a scattered radiation measuring apparatus, the step of obtaining a first effective radiation amount of a first measurement model and a second effective radiation amount of a second measurement model by using a photovoltaic module instead of a total radiation meter as a measurement target further includes: and amplifying the first measurement model and the second measurement model according to a preset proportion through PVsyst software.
In the method for estimating the correction coefficient of the scattered radiation measuring device, the preset proportion is a ratio of a light receiving area of the photovoltaic module to a light receiving area of the total radiation meter.
In the method for estimating the correction coefficient of the scattered radiation measuring device, the first effective radiation amount is a difference value between the first total radiation amount and the first loss radiation amount; the first total radiation amount is obtained from balance and main results tables in PVsyst software; the first amount of lost radiation is 1.
In the method for estimating the correction coefficient of the scattered radiation measuring device, the second effective radiation amount is a difference value between the second total radiation amount and the second loss radiation amount; the second total radiation quantity is obtained from balance and main results tables in PVsyst software; the second amount of lost radiation is 1.
The application also provides a correction coefficient estimation system of the scattered radiation measuring device, which adopts the correction coefficient estimation method of the scattered radiation measuring device to realize control work and comprises a modeling unit, a simulation unit and a calculation unit which are connected in sequence; the modeling unit is used for establishing and outputting a first measurement model and a second measurement model; the simulation unit is used for outputting a first effective radiation quantity and a second effective radiation quantity; the calculating unit is used for outputting the correction coefficient.
Has the advantages that:
the invention provides a correction coefficient estimation method for a scattered radiation measuring device, which obtains a correction coefficient by respectively measuring effective radiant quantities of a first measuring model with a shading ring and a second measuring model without the shading ring so as to correct the first effective radiant quantity, thereby improving the accuracy and reliability of test data, ensuring that a photovoltaic module can be accurately supported by data in actual installation, improving the power generation quantity, and greatly reducing the measurement cost.
Drawings
FIG. 1 is a control flow chart of a correction coefficient estimation method of a scattered radiation measurement apparatus according to the present invention;
fig. 2 is a connection structure diagram of a correction coefficient estimation system of a scattered radiation measurement apparatus according to the present invention.
Description of the main element symbols: 1-modeling unit, 2-simulation unit and 3-calculation unit.
Detailed Description
The invention provides a method and a system for estimating a correction coefficient of a scattered radiation measuring device, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indication of the number of technical features indicated, and that the specific meanings of the above terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 and 2, the present invention provides a method for estimating a correction coefficient of a scattered radiation measuring apparatus, where the scattered radiation measuring apparatus includes a total radiometer and a shading ring, and the method specifically includes the following steps:
s100, establishing a first measurement model with a shading ring and a second measurement model without the shading ring.
The shading ring is used as a shadow shelter, and the photovoltaic module is used as a measurement target; the inclination angle of the photovoltaic module can be adjusted according to the requirements of customers, so that the measurement result is more targeted, the position of spatial distribution needs to be changed by adopting the total radiometer, and the measurement period is longer.
S200, replacing a total radiation meter with a photovoltaic assembly to serve as a measurement target, and acquiring a first effective radiation quantity of a first measurement model and a second effective radiation quantity of a second measurement model; the photovoltaic module is adopted to replace the total radiation meter as a measurement target, so that the measurement period can be shortened, and the reliability of measurement data can be improved.
In addition, the effective radiation quantities of the first measurement model and the second measurement model are respectively measured under the same measurement environment, so that a first effective radiation quantity measured under the condition of the light shielding ring and a second effective radiation quantity measured under the condition of no light shielding ring are obtained.
S300, acquiring a correction coefficient, wherein the correction coefficient is the ratio of the second effective radiation amount to the first effective radiation amount; the correction coefficient is used for correcting the first effective radiation quantity; because the first effective radiation quantity is influenced by the shading ring, the measurement result is smaller than the actual result, and the first effective radiation quantity is corrected through the correction coefficient, so that a reliable basis is provided for obtaining accurate scattered radiation data.
In this embodiment, referring to fig. 1, the establishing a first measurement model with a light-shielding ring and a second measurement model without the light-shielding ring specifically includes: a first measurement model with the shading ring and a second measurement model without the shading ring were established by Sketchup software.
In this embodiment, referring to fig. 1, the step of obtaining a first effective radiation amount of a first measurement model and a second effective radiation amount of a second measurement model by using a photovoltaic module instead of a total radiation meter as a measurement target specifically includes: acquiring a first effective radiation amount of a first measurement model and a second effective radiation amount of a second measurement model through PVsyst software; and (4) selecting a photovoltaic component as a measurement target by PVsyst software instead of the total radiation meter.
Further, referring to fig. 1, the step of obtaining the first effective radiation amount of the first measurement model and the second effective radiation amount of the second measurement model by using the photovoltaic module instead of the total radiation meter as the measurement target further includes step S101: amplifying the first measurement model and the second measurement model according to a preset proportion through PVsyst software; because the proportion of the Sketchup software during modeling is deviated from the proportion of the PVsyst software during introduction, in order to ensure the accuracy of the measurement result, the proportions of the first measurement model and the second measurement model need to be amplified to match the photovoltaic module selected from the PVsyst software.
Further, the preset proportion is a ratio of a light receiving area of the photovoltaic module to a light receiving area of the total radiation meter; in order to ensure the accuracy of the measurement data, the proportion of the first measurement model and the second measurement model needs to be enlarged to match with PVsyst software, so that the test condition of the photovoltaic module is consistent with the test condition of the replaced total radiation meter.
Further, the first effective radiation amount is a difference value between the first total radiation amount and a first loss radiation amount; the first total radiation amount is obtained from balance and main results tables in PVsyst software; the first amount of lost radiation is 1; the first loss radiation quantity is set to be 1 in the loss radiation quantity value of a delayed losse module in PVsyst software; because the loss radiant quantity brought by the surface glass of the photovoltaic module is less, the first loss radiant quantity needs to be set to be 1 so as to reduce the influence brought by the first loss radiant quantity and avoid that the difference value between the first total radiant quantity and the first loss radiant quantity is smaller, thereby leading to the lower first effective radiant quantity.
Further, the second effective radiation dose is the difference between the second total radiation dose and a second loss radiation dose; the second total radiation quantity is obtained from balance and main results tables in PVsyst software; the second amount of lost radiation is 1; the second loss radiation quantity is set to be 1 in the loss radiation quantity value of a delayed losse module in PVsyst software; because the loss radiant quantity brought by the surface glass of the photovoltaic module is less, the second loss radiant quantity needs to be set to be 1 so as to reduce the influence brought by the second loss radiant quantity and avoid that the difference value between the second radiant quantity and the second loss radiant quantity is smaller, thereby leading to the lower second effective radiant quantity.
In summary, the effective radiation amounts of the first measurement model with the shading ring and the second measurement model without the shading ring are respectively measured, so that the correction coefficient is obtained, the first effective radiation amount is corrected, the accuracy and the reliability of test data are improved, the photovoltaic module can be ensured to be accurately supported by data in actual installation, the power generation amount is improved, and the scheme is simple, reliable and greatly reduces the measurement cost.
Referring to fig. 2, the present invention further provides a system for estimating a correction coefficient of a scattered radiation measurement apparatus, which uses the method for estimating a correction coefficient of a scattered radiation measurement apparatus to realize control work, and includes a modeling unit 1, a simulation unit 2 and a calculation unit 3, which are connected in sequence; the modeling unit 1 is used for establishing and outputting a first measurement model and a second measurement model; the simulation unit 2 is used for outputting a first effective radiation amount and a second effective radiation amount; the calculating unit 3 is used for outputting a correction coefficient.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (8)
1. A method for estimating correction coefficients of a scattered radiation measuring device, wherein the scattered radiation measuring device comprises a total radiometer and a shading ring, and is characterized by comprising the following steps:
establishing a first measurement model with a shading ring and a second measurement model without the shading ring;
the method comprises the steps that a photovoltaic assembly replaces a total radiation meter to serve as a measurement target, and a first effective radiation quantity of a first measurement model and a second effective radiation quantity of a second measurement model are obtained;
and acquiring a correction coefficient, wherein the correction coefficient is the ratio of the second effective radiation amount to the first effective radiation amount.
2. The method for estimating the correction coefficient of the scattered radiation measuring apparatus according to claim 1, wherein the establishing of the first measurement model with the light shielding ring and the second measurement model without the light shielding ring comprises: a first measurement model with the shading ring and a second measurement model without the shading ring were established by Sketchup software.
3. The method for estimating the correction coefficient of the scattered radiation measurement apparatus according to claim 1, wherein the photovoltaic module is used as a measurement target instead of the total radiation meter to obtain a first effective radiation amount of the first measurement model and a second effective radiation amount of the second measurement model, and specifically: and acquiring a first effective radiation quantity of the first measurement model and a second effective radiation quantity of the second measurement model through PVsyst software.
4. The scattered radiation measurement apparatus correction coefficient estimation method according to claim 3, wherein the step of obtaining the first effective radiation amount of the first measurement model and the second effective radiation amount of the second measurement model by using the photovoltaic module instead of the total radiation meter as a measurement target further comprises the steps of: and amplifying the first measurement model and the second measurement model according to a preset proportion through PVsyst software.
5. The scattered radiation measurement apparatus correction coefficient estimation method according to claim 4, wherein the preset ratio is a ratio of a light receiving area of the photovoltaic module to a light receiving area of the total radiation meter.
6. The scattered radiation measurement apparatus correction coefficient estimation method according to claim 3, wherein the first effective radiation amount is a difference between the first total radiation amount and a first loss radiation amount; the first total radiation amount is obtained from balance and main results tables in PVsyst software; the first amount of lost radiation is 1.
7. The scattered radiation measurement apparatus correction coefficient estimation method according to claim 3, wherein the second effective radiation amount is a difference between the second total radiation amount and a second loss radiation amount; the second total radiation quantity is obtained from balance and main results tables in PVsyst software; the second amount of lost radiation is 1.
8. A scattered radiation measuring device correction coefficient estimation system is characterized in that the scattered radiation measuring device correction coefficient estimation system adopts the scattered radiation measuring device correction coefficient estimation method of any one of claims 1 to 7 to realize work control, and comprises a modeling unit, a simulation unit and a calculation unit which are connected in sequence; the modeling unit is used for establishing and outputting a first measurement model and a second measurement model; the simulation unit is used for outputting a first effective radiation quantity and a second effective radiation quantity; the calculating unit is used for outputting the correction coefficient.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201434725Y (en) * | 2009-07-15 | 2010-03-31 | 中国科学院沈阳应用生态研究所 | Simple diffuse solar radiation meter |
| CN204836074U (en) * | 2015-07-23 | 2015-12-02 | 江苏百瑞自动化科技有限公司 | Photovoltaic power prediction unit based on MPPT |
| CN105913140A (en) * | 2016-04-06 | 2016-08-31 | 北京建筑大学 | Power generation prediction method and device based on building information model |
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- 2020-12-24 CN CN202011554473.8A patent/CN112737505A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201434725Y (en) * | 2009-07-15 | 2010-03-31 | 中国科学院沈阳应用生态研究所 | Simple diffuse solar radiation meter |
| CN204836074U (en) * | 2015-07-23 | 2015-12-02 | 江苏百瑞自动化科技有限公司 | Photovoltaic power prediction unit based on MPPT |
| CN105913140A (en) * | 2016-04-06 | 2016-08-31 | 北京建筑大学 | Power generation prediction method and device based on building information model |
Non-Patent Citations (2)
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| 刘建国: "《普通高等教育"十三五"规划教材 高等学校新能源科学与工程专业教材 可再生能源导论》", 28 February 2017, 北京：中国轻工业出版社 * |
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Application publication date: 20210430 |