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Method for measuring peak sunshine hours

A measurement method and technology of hours, applied in the field of measurement, can solve the problems of photovoltaic system design inconvenience, inconvenient design, and inability to solve weak light output deviation, etc., and achieve good application prospects, accurate design, and simple test methods

Inactive Publication Date: 2010-06-02
CSI CELLS CO LTD +6
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Problems solved by technology

Therefore, the measurement method of the meteorological department cannot solve the problem of output deviation in low light, which brings inconvenience to the design of photovoltaic systems
[0005] On the other hand, the data provided by the meteorological department are in kcal / m 2 、kwh / m 2 In the design of photovoltaic system, it is more convenient to directly use the peak sunshine hours to design. Therefore, it is usually necessary to convert the above solar radiation into peak sunshine hours before using it, which also brings a lot of problems to the design. inconvenient

Method used

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Embodiment 1

[0023] A method for measuring peak sunshine hours, comprising the steps of:

[0024] (1) Using a calibrated standard solar cell, divide each day into N time periods, the duration of each time period is t, measure the instantaneous radiation intensity S of each time period, then the daily radiation amount is Q=NSt, and the corresponding The daily peak sunshine hours are Hp=NSt / 1000;

[0025] (2) Obtain the daily average peak sunshine hours and annual average peak sunshine hours of each month according to the method of averaging;

[0026] (3) Store and export the above-mentioned daily peak sunshine hours, monthly average peak sunshine hours and annual average peak sunshine hours data.

[0027] In the above technical scheme, the instantaneous radiation intensity S in the step (1) is calculated according to the following formula:

[0028] S=1000×I SC1 ×[1+α(T-25)] / I SC2

[0029] Among them: I SC1 is the instantaneous short-circuit current of the standard solar cell, in A; α ...

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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 [0001] The invention relates to a measuring method, in particular to a measuring method of peak sunshine hours. Background technique [0002] In photovoltaic system design, solar radiation is a key parameter in system design. At present, the solar radiation is mainly based on the radiation parameters provided by the meteorological department. These data are generally obtained by measuring with a solar radiation measuring instrument. The sensor used by the solar radiation measuring instrument is an electric heating pile. Under different spectral frequency bands and different radiation intensities, There is a big difference in the response of the electric heating pile and the solar cell to the radiation intensity. Therefore, using the radiation data obtained by the electric heating pile sensor as the design basis of the solar power generation system will inevitably cause the design deviation of the power generation system. [0003] For the deviation of the dat...

Claims

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Application Information

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IPC IPC(8): G01W1/12
CPCY02A90/10
Inventor 闫广川
Owner CSI CELLS CO LTD
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