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Spectral analysis calculation method and calculator for illumination intensity data

A technology of light intensity and spectrum analysis, applied in complex mathematical operations and other directions, to solve problems such as unutilized light intensity data

Inactive Publication Date: 2014-11-19
BEIJING JIAOTONG UNIV
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Problems solved by technology

However, it is worth noting that DFT and FFT do not take advantage of the "periodic sparse" characteristic of the light intensity data itself.

Method used

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  • Spectral analysis calculation method and calculator for illumination intensity data
  • Spectral analysis calculation method and calculator for illumination intensity data
  • Spectral analysis calculation method and calculator for illumination intensity data

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with a set of embodiments and accompanying drawings.

[0039] Such as figure 1 As shown, the present invention discloses a flow chart of a method for spectral analysis and calculation of light intensity data, and the method specifically includes:

[0040] Step S101, input "hour-level" light intensity data x with dimension n irr =(x l ) 1×n ;

[0041] Step S102, organize the data into a periodic sparse format, that is, each x l processed as x l = [ x 0 l , x 1 l , L , x w - 1 l , ...

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Abstract

The invention discloses a spectral analysis calculation method and calculator for illumination intensity data. The calculation method is characterized by including the steps that a sparse format arrangement is performed on the collected illumination intensity data to form data which are distributed in a periodically sparse mode; the illumination intensity data which are distributed in the periodically sparse mode are normalized to be in a power (2, n) form; partial Fourier transformation is performed on the normalized illumination intensity data; fast Fourier transformation is used for calculating the data which partial Fourier transformation is performed on, so that the spectrum of illumination intensity is obtained. The invention further discloses the spectral analysis calculator for the illumination intensity data. According to the technical scheme, on the premise that the distribution characteristics of the data spectrum are not changed, an existing Fourier transformation technology is improved, the periodically sparse characteristic of the illumination intensity is sufficiently utilized, redundancy calculation on zero elements is avoided, and a novel partial Fourier transformation technology is formed. In this way, the efficiency of spectrum calculation is improved.

Description

technical field [0001] The invention relates to a photovoltaic signal processing method, in particular to a spectrum analysis calculation method and a calculator for light intensity data. Background technique [0002] Illumination intensity refers to the energy of visible light received per unit area. In the field of photovoltaic power generation, light intensity is the most important factor determining the power output of photovoltaic systems. The purpose of spectral analysis of light intensity data is to grasp the frequency distribution characteristics of light intensity in a period of time, which has important reference value for the design of large-scale photovoltaic systems and the optimization of related technologies such as energy storage. [0003] At present, the spectral analysis techniques and methods for light intensity data are all developed around discrete Fourier transform (Discrete Fourier Transformation, DFT) or fast Fourier transform (Fast Fourier Transform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/14
Inventor 李鹏刘峰宋永端李遥
Owner BEIJING JIAOTONG UNIV
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