Method for constructing real-time solar irradiation metering network of gigawatts level photovoltaic power generation base

Patent metadata

Field	Value
Publication number	US-9825580-B2
Application number	US-201414497332-A
Country	US
Kind code	B2
Filing date	Sep 26, 2014
Priority date	Sep 26, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A method for constructing real-time solar irradiation metering network of gigawatt-level photovoltaic power generation base comprises the following steps: Spatial and temporal distribution characteristics of irradiation quantity of the target area is analyzed based on the historical observation data of the irradiation quantity. The outline location of solar irradiation metering stations is determined by dividing the typical areas where the spatial and temporal distribution characteristics are consistent. The detailed location of solar irradiation metering stations is selected based on the center location distribution of photovoltaic power station clustering. A solar irradiation metering device is constructed on the detailed location of the solar irradiation metering station.

First claim

What is claimed is:

1. A method for constructing real-time solar irradiation metering network of a gigawatt-level photovoltaic power generation base, the method comprising:
analyzing spatial and temporal distribution characteristics of irradiation quantity of an area, wherein the gigawatt-level photovoltaic power generation base is located based on the historical observation data of the irradiation quantity;
determining an outline location of each solar irradiation metering stations by dividing typical areas based on the spatial and temporal distribution characteristics, wherein the spatial and temporal distribution characteristics of irradiation are consistent in the same areas;
selecting a detailed location of each solar irradiation metering stations based on an location center of photovoltaic power station clustering; and
constructing an solar irradiation metering device on each detailed location of the solar irradiation metering stations.

2. The method of claim 1 , wherein the observation data of the irradiation quantity is accumulated for more than 30 years with the cluster of weather station around the gigawatt level photovoltaic power generation base.

3. The method of claim 1 , wherein the detailed location of the solar irradiation metering stations is selected by:
selecting the largest principle components;
performing a rotated principal component analysis to the cluster of larger principle components; and
determining typical areas by setting an appropriate threshold, wherein the spatial and temporal distribution characteristics of the irradiation quantity in each of the typical areas are consistent.

4. The method of claim 1 , wherein the regional irradiation quantity matrix T m×n of the observation data with m solar irradiation metering stations and n observation samples is decomposed by multiplying the eigenvectors V m×n with the weighting coefficient U n×m of the eigenvectors:
T m×n =V m×n U n×m ,
wherein each column in the eigenvectors V m×n comprises m normalized eigenvectors, and the weighting coefficient U n×m represents the time coefficient.

5. The method of claim 4 , wherein the p largest principle components are selected, so that the variance S of the weighting coefficient U n×m is maximum after being rotated:

S
2

=

1

m
2

[

m
⁢

∑

j
=
1

p

⁢

⁢

∑

i
=
1

n

⁢

⁢

(

v
ij

∑

j
=
1

p

⁢

⁢

v
ij
2

)

-

∑

j
=
1

p

⁢

⁢

∑

i
=
1

n

⁢

(

v
ij
2

∑

j
=
1

p

⁢

⁢

v
ij
2

)

]

.

6. The method of claim 1 , wherein the detailed location of the solar irradiation metering station is determined by following:
obtaining a GPS coordinate of the center of the photovoltaic power station, wherein the GPS coordinate of the center of the photovoltaic power station is taken as the location coordinate of the photovoltaic power station;
getting the outline locations of the solar irradiation metering stations by the clustering method;
forming the photovoltaic power stations by clustering the location coordinates of the photovoltaic power station; and
taking a center of each photovoltaic power station group as the detailed location of the solar irradiation metering station.

7. The method of claim 6 , wherein the outline locations of the solar irradiation metering stations is obtained by:
step (a21), selecting k macroscopic locations of the photovoltaic power stations as an initial clustering center locations arbitrarily;
step (a22), calculating a distance between the location coordinate of the photovoltaic power station and the initial clustering center in each area

Assignees

• State Grid Corp China
• Gansu Electric Power Company of State Grid
• Wind Power Tech Center Of Gansu Electric Power Company
• Univ Tsinghua

Inventors

• Wang ning-bo
• Lu Liang
• Lv qing-quan
• Qiao Ying
• Lu zong-xiang
• Ding Kun
• Zhou shi-yuan
• Wang Ding-Mei
• Ma Ming

Classifications

• H02S50/15

  using optical means, e.g. using electroluminescence · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• H02S50/00

  Monitoring or testing of PV systems, e.g. load balancing or fault identification · CPC title

• H02S10/00 Primary

  PV power plants; Combinations of PV energy systems with other systems for the generation of electric power · CPC title

• G06F30/00

  Computer-aided design [CAD] · CPC title