CN101718880B - Method for measuring peak sunshine hours - Google Patents
Method for measuring peak sunshine hours Download PDFInfo
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- CN101718880B CN101718880B CN2009102320770A CN200910232077A CN101718880B CN 101718880 B CN101718880 B CN 101718880B CN 2009102320770 A CN2009102320770 A CN 2009102320770A CN 200910232077 A CN200910232077 A CN 200910232077A CN 101718880 B CN101718880 B CN 101718880B
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- sunshine hours
- peak sunshine
- solar cells
- radiation intensity
- day
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a method for measuring peak sunshine hours, which comprises the following steps: (1) using calibrated standard solar cells to divide each day into N time periods with a duration of t and measuring instantaneous radiation intensity S of each time period, wherein the daily radiation quantity can be calculated according to an equation that Q is equal to N,S and t and the corresponding daily peak sunshine hours can be calculated according to an equation that Hp is equal to NST/1,000; (2) obtaining daily average peak sunshine hours of each month and yearly average peak sunshine hours by using an averaging method; and (3) storing and exporting the data on the daily peak sunshine hours, monthly average peak sunshine hours and yearly average peak sunshine hours. The method can directly obtain peak sunshine hours and make photovoltaic system design more visual and convenient.
Description
Technical field
The present invention relates to a kind of assay method, be specifically related to a kind of assay method of peak sunshine hours.
Background technology
In the photovoltaic system design, solar radiation quantity is the key parameter of system design.At present, solar radiation quantity mainly is the radiation parameter that adopts meteorological department to provide, these data generally all are to adopt solar radiation measuring set to measure acquisition, the sensor that solar radiation measuring set adopts is the electric heating heap, under different spectrum frequency ranges and different radiation intensity, electric heating heap and solar cell have very big difference to the response of radiation intensity, and therefore, the radiation data that electricity consumption thermal reactor sensor obtains certainly will cause the design deviation of electricity generation system as the design considerations of solar power system.
Meteorological department is adopted the existing deviation of the data that method of testing obtained that meets national standard, though spectrum, light intensity, temperature wait and revise in the time of can testing by reference, but factors such as the spectrum that each department, day part are changed at any time, light intensity, temperature, correction work is extremely numerous and diverse.At present when photovoltaic system designs, this deviation is just rule of thumb done roughly a conversion, tool bears the character of much blindness.
The reason of above-mentioned deviation is by solar cell and response different cause of electric heating heap to spectrum, radiation intensity etc.Because solar cell is under low light level situation, its output is nonlinear relationship with light intensity, and the output of the pairing system of the radiant quantity when causing the low light level can not reflect true output situation fully.Particularly, as the big (S＞700w/m of radiation intensity
2) time, the short-circuit current I of radiation intensity S and solar cell
SC1Be the almost relation, and as the less (S＜300w/m of radiation intensity
2) time, S and I
SC1Be nonlinear relationship.Therefore, the output bias problem the when assay method of employing meteorological department can't solve the low light level, design has brought inconvenience to photovoltaic system.
On the other hand, the data that provide of meteorological department are with kcal/m
2, kwh/m
2Be the solar radiation quantity of unit, it is then more easy directly to adopt peak sunshine hours to design in the photovoltaic system design, so re-uses after above-mentioned solar radiation quantity need being converted into peak sunshine hours usually, has also brought inconvenience to design.
Summary of the invention
The assay method that the purpose of this invention is to provide a kind of peak sunshine hours with direct acquisition peak sunshine hours, makes the photovoltaic system design more accurately, intuitively, conveniently.
To achieve the above object of the invention, the technical solution used in the present invention is: a kind of assay method of peak sunshine hours comprises the steps:
(1) standard solar cells that adopts process to demarcate, to be divided into N time period every day, the duration of each time period is t, measures the instantaneous radiation intensity S S of each time period, then a day radiant quantity is Q=NSt, and a corresponding day peak sunshine hours is Hp=NSt/1000;
(2) obtain each month per day peak sunshine hours and annual peak sunshine hours according to the method for averaging;
(3) above-mentioned day peak sunshine hours, monthly average peak sunshine hours and annual peak sunshine hours data storing are also derived.
Above, describedly will be divided into N time period every day, the duration of each time period is t, and this t is the smaller the better, as 0.5 second, forms the situation of similar integration, so that obtain radiant quantity more accurately; This implementation can adopt existing data acquisition system (DAS) to collect and obtain.Can obtain 378 data according to the method described above every year, wherein day 365 of peak sunshine hours, 12 of monthly average peak sunshine hours and annual peak sunshine hours are 1.
The present invention directly adopts standard solar cells to measure, and the radiation data of its acquisition is more consistent with photovoltaic system aspect low light level effect and spectral response, thereby design more has using value to photovoltaic system.
In the technique scheme, the instantaneous radiation intensity S S in the described step (1) calculates according to following formula:
S＝1000×I
SC1×[1+α(T-25)]/I
SC2
Wherein: I
SC1Be the standard solar cells transient short-circuit current, unit is A; α is the standard solar cells current temperature coefficient; T is the standard solar cells transient temperature; I
SC2Be the short-circuit current under the standard solar cells STC, unit is A.Wherein STC is the abbreviation of standard test condition, is meant at radiation intensity 1000W/m
2, measure when 25 ℃ of temperature, air quality AM=1.5.
In the technique scheme, described mensuration is from radiation intensity＞0 o'clock, and radiation intensity=0 o'clock is measured and to be finished.
Because the employing of technique scheme, compared with prior art, the present invention has following advantage:
1. because the present invention directly adopts standard solar cells to measure, the radiation data of its acquisition is more consistent with photovoltaic system aspect low light level effect and spectral response, thereby photovoltaic system design is more had using value.
2. the present invention can directly obtain peak sunshine hours, does not need conversion directly to use, and makes the photovoltaic system design more accurately, intuitively, conveniently.
3. method of testing of the present invention is simple, and cost is lower, has a good application prospect.
Embodiment
Below in conjunction with embodiment the present invention is further described:
Embodiment one
A kind of assay method of peak sunshine hours comprises the steps:
(1) standard solar cells that adopts process to demarcate, to be divided into N time period every day, the duration of each time period is t, measures the instantaneous radiation intensity S S of each time period, then a day radiant quantity is Q=NSt, and a corresponding day peak sunshine hours is Hp=NSt/1000;
(2) obtain each month per day peak sunshine hours and annual peak sunshine hours according to the method for averaging;
(3) above-mentioned day peak sunshine hours, monthly average peak sunshine hours and annual peak sunshine hours data storing are also derived.
In the technique scheme, the instantaneous radiation intensity S S in the described step (1) calculates according to following formula:
S＝1000×I
SC1×[1+α(T-25)]/I
SC2
Wherein: I
SC1Be the standard solar cells transient short-circuit current, unit is A; α is the standard solar cells current temperature coefficient; T is the standard solar cells transient temperature; I
SC2Be the short-circuit current under the standard solar cells STC, unit is A.Wherein STC is the abbreviation of standard test condition, is meant at radiation intensity 1000W/m
2, measure when 25 ℃ of temperature, air quality AM=1.5.Described mensuration is from radiation intensity＞0 o'clock, and radiation intensity=0 o'clock is measured and to be finished.
Above, describedly will be divided into N time period every day, the duration of each time period is t, and this t is the smaller the better, as 0.5 second, forms the situation of similar integration, so that obtain radiant quantity more accurately; This implementation can adopt existing data acquisition system (DAS) to collect and obtain.Can obtain 378 data according to the method described above every year, wherein day 365 of peak sunshine hours, 12 of monthly average peak sunshine hours and annual peak sunshine hours are 1.
The present invention directly adopts standard solar cells to measure, and the radiation data of its acquisition is more consistent with photovoltaic system aspect low light level effect and spectral response, thereby design more has using value to photovoltaic system.
Claims (2)
1. the assay method of a peak sunshine hours is characterized in that, comprises the steps:
(1) standard solar cells that adopts process to demarcate, to be divided into N time period every day, the duration of each time period is t, measures the instantaneous radiation intensity S S of each time period, then a day radiant quantity is Q=NSt, and a corresponding day peak sunshine hours is Hp=NSt/1000;
(2) obtain each month per day peak sunshine hours and annual peak sunshine hours according to the method for averaging;
(3) above-mentioned day peak sunshine hours, monthly average peak sunshine hours and annual peak sunshine hours data storing are also derived;
Instantaneous radiation intensity S S in the described step (1) calculates according to following formula:
S＝1000×I
SC1×[1+α(T-25)]/I
SC2
Wherein: I
SC1Be the standard solar cells transient short-circuit current, unit is A; α is the standard solar cells current temperature coefficient; T is the standard solar cells transient temperature; I
SC2Be the short-circuit current under the standard solar cells STC, unit is A; Wherein STC is meant at radiation intensity 1000W/m
2, measure when 25 ℃ of temperature, air quality AM=1.5.
2. the assay method of peak sunshine hours according to claim 1 is characterized in that: described mensuration is from radiation intensity＞0 o'clock, and radiation intensity=0 o'clock is measured and to be finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102320770A CN101718880B (en) | 2009-11-30 | 2009-11-30 | Method for measuring peak sunshine hours |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102320770A CN101718880B (en) | 2009-11-30 | 2009-11-30 | Method for measuring peak sunshine hours |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101718880A CN101718880A (en) | 2010-06-02 |
| CN101718880B true CN101718880B (en) | 2011-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102320770A Expired - Fee Related CN101718880B (en) | 2009-11-30 | 2009-11-30 | Method for measuring peak sunshine hours |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116470A (en) * | 2015-06-29 | 2015-12-02 | 华北水利水电大学 | Sunshine duration calculation based on ground feature TIN model |
| CN106326191B (en) * | 2016-08-26 | 2018-09-21 | 河海大学 | A method of sunshine time is quantified based on weather forecast descriptive data |
| US10977341B2 (en) | 2019-01-18 | 2021-04-13 | Hide Housing Corporation | Insolation probability distribution analysis method, insolation probability distribution analysis system, insolation probability distribution analysis program product, insolation normalization statistical analysis method, insolation normalization statistical analysis system, and insolation normalization statistical analysis program product |
| WO2023149123A1 (en) * | 2022-02-07 | 2023-08-10 | ソーラーフロンティア株式会社 | Solar radiation meter, solar radiation meter system, and method for calibrating solar radiation meter |
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2009
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| CN101718880A (en) | 2010-06-02 |
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Granted publication date: 20110504 Termination date: 20131130 |