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Method and device for measuring dust deposition and effective solar radiation on the surface of photovoltaic cells

A photovoltaic cell and measurement method technology, applied in optical radiation measurement, measurement device, photovoltaic system monitoring, etc., can solve the problem of not considering attenuation effect, affecting the prediction accuracy of photovoltaic cell power generation power, etc.

Active Publication Date: 2018-08-10
NINGXIA UNIVERSITY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods all use the actual solar radiation intensity as the reference parameter for prediction, and do not consider the attenuation of solar radiation by the deposition of dust and other particles on the surface of photovoltaic cells, which affects the prediction accuracy of photovoltaic cell power generation.

Method used

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  • Method and device for measuring dust deposition and effective solar radiation on the surface of photovoltaic cells
  • Method and device for measuring dust deposition and effective solar radiation on the surface of photovoltaic cells
  • Method and device for measuring dust deposition and effective solar radiation on the surface of photovoltaic cells

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Embodiment 1

[0041] This embodiment gives the inversion calculation process of the calculation method adopted in the present invention.

[0042] Through the aerosol particle spectrometer, the dust particle size distribution information in the air is collected, and the normal distribution is used for fitting, which is recorded as f(r).

[0043] Acquisition of solar radiation intensity I by real-time measurement 0 and photovoltaic cell reflected solar radiation intensity I 1 , to calculate the surface reflectance of the photovoltaic cell, denoted as

[0044] η = I 1 / I 0 .

[0045] For a specific measurement point, the incident angle θ of sunlight at the measurement point at different times is a known value. According to the electromagnetic theory, assuming that there is sand and dust covering the surface of the photovoltaic cell, the relative permittivity of the medium is ε, then by The relative permittivity ε of the surface medium of the photovoltaic cell covered by dust is calculat...

Embodiment 2

[0060] This embodiment provides a collection device for obtaining relevant environmental parameters of photovoltaic cells in Embodiment 1.

[0061] A device for collecting environmental parameters related to photovoltaic cells, such as figure 2As shown, it includes a thermo-hygrometer 2 arranged on the main support 1 for measuring air temperature and humidity, an aerosol particle spectrometer 3 for measuring aerosol concentration and its particle size distribution information, and a wind speed for measuring wind speed and direction. Instrument 4, flat photovoltaic cell 5, a radiation intensity sensor 6 positioned above the photovoltaic cell 5 for measuring solar radiation and solar reflected radiation intensity on the surface of the photovoltaic cell; The radiation intensity sensor 6 of the meter 4 is electrically connected with the data acquisition and processing module 7 .

[0062] The main support 1 is a vertical column. The photovoltaic cell 5 and the radiation intensit...

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Abstract

The invention relates to a photovoltaic cell surface sand and dust deposition and effective solar radiation measuring method and apparatus. According to the photovoltaic cell surface sand and dust deposition and effective solar radiation measuring method and apparatus, the sand and dust deposition condition of the surface of a photovoltaic cell can be embodied through measuring the solar reflected radiation intensity of the surface of the photovoltaic cell; inversion is performed based on the sand and dust deposition condition of the surface of the photovoltaic cell, so that the sand and dust deposition quantity of the surface of the photovoltaic cell can be obtained; and therefore, the effective solar radiation intensity of the photovoltaic cell can be obtained, and a basis can be provided for the accurate prediction of the generated power of the photovoltaic cell.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic cells, and relates to a method and a device for measuring the dust deposition amount on the surface of a photovoltaic cell, and a method and a device for measuring the effective solar radiation intensity on the surface of a photovoltaic cell. Background technique [0002] Accurate prediction of photovoltaic cell power generation is an important part of realizing grid-connected operation of photovoltaic power plants. Current forecasting methods for photovoltaic power generation include mathematical statistical probability forecasting models, artificial intelligence forecasting methods, forecasting based on weather forecasting models, etc. (Zhang Yu et al. Summary of forecasting photovoltaic power generation [A]. ):27-30). However, the above methods all use the actual solar radiation intensity as the reference parameter for prediction, and do not consider the attenuation of solar radiation by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/00G01N15/02G01D21/02H02S50/10
CPCG01D21/02G01J1/00G01N15/02H02S50/10Y02E10/50
Inventor 李兴财屈高强车彬申新远孔祥宇梁亚波马炜潘庆庆牛坤
Owner NINGXIA UNIVERSITY