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Annual global radiation spatial and temporal distribution characteristic analyzing method based on experience orthogonal decomposition

A technology of empirical orthogonal decomposition and time-space distribution, which is applied in the field of analysis of annual total radiation time-space distribution characteristics based on empirical orthogonal decomposition, can solve problems such as poor environmental protection, low energy conversion efficiency, and poor stability

Inactive Publication Date: 2014-06-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least defects such as poor stability, low energy conversion efficiency and poor environmental protection in the prior art

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  • Annual global radiation spatial and temporal distribution characteristic analyzing method based on experience orthogonal decomposition
  • Annual global radiation spatial and temporal distribution characteristic analyzing method based on experience orthogonal decomposition
  • Annual global radiation spatial and temporal distribution characteristic analyzing method based on experience orthogonal decomposition

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Embodiment Construction

[0047] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0048] Empirical Orthogonal Function (EOF for short) decomposition is a linear combination that decomposes the original variable field into orthogonal functions, forming a small number of uncorrelated typical modes, replacing the original variable field, each Typical modes all contain as much original field information as possible.

[0049] According to an embodiment of the present invention, such as Figure 1a , Figure 1b , Figure 2a , Figure 2b and image 3 As shown, a method for analyzing the temporal and spatial distribution characteristics of annual total radiation based on empirical orthogonal decomposition is provided.

[0050] The method for analyzing...

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Abstract

The invention discloses an annual global radiation spatial and temporal distribution characteristic analyzing method based on experience orthogonal decomposition. The method mainly includes: performing standardization moment flattening on power plant annual global radiation data; performing EOF decomposition on annular global radiation variable field matrixes on the basis of the standardization moment flattening results; calculating variance contribution rate and added variance contribution rate on the basis of the EOF decomposition results; analyzing spatial distribution and time coefficient of each main feature vector on the basis of the calculation results of variance contribution rate and added variance contribution rate. The method has the advantages that the defects of poor stability, low energy conversion efficiency, poor environment protection performance, and the like in the prior art can be overcome, and the method is good in stability, high in energy conversion efficiency and good in environment protection performance.

Description

technical field [0001] The invention relates to the field of annual total solar radiation analysis for photovoltaic power generation, in particular to a method for analyzing the temporal and spatial distribution characteristics of annual total radiation based on empirical orthogonal decomposition. Background technique [0002] According to relevant statistics, the National Development and Reform Commission has planned more than ten million-kilowatt photovoltaic power generation bases in Qinghai, Gansu and other provinces. At present, my country has entered a period of rapid development of photovoltaic power generation. In 2012, the photovoltaic power generation capacity of the national grid dispatching scope was 3.568 billion kwh, a year-on-year increase of 466%. [0003] Taking Gansu as an example, as of November 2013, Gansu's grid-connected photovoltaic power generation capacity has exceeded 2 million kilowatts, becoming the second largest emerging energy after wind power....

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Application Information

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IPC IPC(8): G06F19/00
Inventor 路亮汪宁渤周强王小勇黄蓉张金平张建美
Owner STATE GRID CORP OF CHINA
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