CN-122001297-A - Method and system for testing albedo of unmanned aerial vehicle cruising photovoltaic power station

CN122001297ACN 122001297 ACN122001297 ACN 122001297ACN-122001297-A

Abstract

The invention belongs to the technical field of new energy detection, and relates to an albedo testing method and system for an unmanned aerial vehicle cruising photovoltaic power station. The method comprises the steps of collecting space position coordinates, flight attitude data, incident radiation intensity, reflected radiation intensity and aerial images of all measurement points, judging the effectiveness of the measurement points according to a preset flight attitude angle threshold, eliminating invalid measurement points of the flight attitude data exceeding the flight attitude angle threshold, calculating single-point albedo based on the incident radiation intensity and the reflected radiation intensity of the effective measurement points, carrying out geometric correction on the aerial images based on the space position coordinates and the flight attitude data to generate digital orthographic images, determining non-coincident aerial zone areas based on the digital orthographic images, and calculating the overall albedo of the photovoltaic power station based on the single-point albedo of the effective measurement points in all the non-coincident aerial zone areas. The invention realizes high-precision and high-efficiency measurement of the albedo of the photovoltaic power station.

Inventors

YAN AIJUN
YANG GUOZHONG
GAO JIN
SUN JIANWEI
MA XIAOHONG
WANG ZHIHAO
NIU RUIJIE
FAN ZHIDONG
ZHAO LEI
KANG YING
LI JIANGAO
LI XINGWANG

Assignees

西安热工研究院有限公司
华能沁北发电有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260409

Claims (10)

1. The method for testing the albedo of the unmanned aerial vehicle cruising photovoltaic power station is characterized by comprising the following steps of: Synchronously acquiring space position coordinates, flight attitude data, incident radiation intensity, reflected radiation intensity and aerial images of all measurement points through an unmanned aerial vehicle; Judging the validity of the measurement points according to a preset flight attitude angle threshold value, and eliminating invalid measurement points of flight attitude data exceeding the flight attitude angle threshold value; Calculating a single point albedo based on the incident radiation intensity and the reflected radiation intensity of the effective measurement point; performing geometric correction on the aerial image based on the space position coordinates and the flight attitude data to generate a digital orthophoto map; Determining a non-coincident band region based on the digital orthophotomap; And calculating the overall albedo of the photovoltaic power station based on the single-point albedo of the effective measurement points in each non-coincident aeroband region.
2. The method for testing the albedo of the photovoltaic power station for cruising of the unmanned aerial vehicle according to claim 1, wherein the incident radiation intensity is collected through an incident radiation sensor arranged above the unmanned aerial vehicle body, the induction surface of the incident radiation sensor is more than or equal to 10cm away from the top of the unmanned aerial vehicle body, the reflected radiation intensity is collected through a reflected radiation sensor arranged below the unmanned aerial vehicle body, and the induction surface of the reflected radiation sensor is more than or equal to 30cm away from the bottom of the unmanned aerial vehicle body.
3. The method for testing the albedo of the photovoltaic power station for cruising of the unmanned aerial vehicle according to claim 2, wherein the aerial image is photographed by a camera, and the field angle of view of the camera is matched with the ground monitoring range of the reflected radiation sensor.
4. The method for testing the albedo of the photovoltaic power station cruising by the unmanned aerial vehicle according to claim 2, wherein the width of the aeroband area is dynamically adjusted according to the ground projection range of the reflected radiation sensor, and the adjustment formula is as follows: in the formula, The width of the navigation belt area is m; the real-time flying height is given by m; for the field angle of the reflected radiation sensor, the unit is.
5. The method for testing the albedo of the unmanned aerial vehicle cruising photovoltaic power station according to claim 1, wherein the overlapping rate between adjacent navigation belt areas in the cruising path of the unmanned aerial vehicle is 60% -70%.
6. The method for testing the albedo of the unmanned aerial vehicle cruising photovoltaic power station according to claim 1, wherein the preset flight attitude angle threshold is 15 degrees, and when the pitch angle or roll angle of the unmanned aerial vehicle is larger than 15 degrees, the measurement point is judged to be an invalid measurement point.
7. The method for testing the albedo of the unmanned aerial vehicle cruising photovoltaic power station according to claim 1, wherein the method for determining the non-coincident aeroband region based on the digital orthophotomap is as follows: The method comprises the steps of extracting boundary polygons of all the navigation belt areas in the digital orthographic image to generate corresponding vector boundary image layers, carrying out space superposition analysis on the boundary polygons of adjacent navigation belt areas, calculating the ratio of the intersection area to the area of a single navigation belt area to be used as the area occupation ratio of the overlapping areas, and selecting the navigation belt areas with the area occupation ratio of the overlapping areas not exceeding a preset threshold as non-overlapping navigation belt areas.
8. The method for testing the albedo of the photovoltaic power station cruising by the unmanned aerial vehicle according to claim 1, wherein the calculation formula of the single-point albedo is as follows: in the formula, Single point albedo for the i-th effective measurement point; the reflected radiation intensity for the ith effective measurement point is given in W/m 2 ; the intensity of the incident radiation for the ith effective measurement point is in W/m 2 .
9. The method for testing the albedo of the photovoltaic power station cruising by the unmanned aerial vehicle according to claim 1, wherein the calculation formula of the overall albedo of the photovoltaic power station is as follows: in the formula, The overall albedo of the photovoltaic power station; Is the first Single point albedo of each effective measurement point; Is the first The ground projection area of each non-coincident navigation belt area is m 2 ; The unit is m 2 , which is the total area of the photovoltaic power station.
10. Unmanned aerial vehicle cruises photovoltaic power plant albedo test system, its characterized in that includes: The data acquisition module is used for synchronously acquiring the space position coordinates, the flight attitude data, the incident radiation intensity, the reflected radiation intensity and the aerial image of each measurement point through the unmanned aerial vehicle; the data judging module is used for judging the validity of the measuring points according to a preset flight attitude angle threshold value and eliminating invalid measuring points of flight attitude data exceeding the flight attitude angle threshold value; the single-point albedo calculation module is used for calculating the single-point albedo based on the incident radiation intensity and the reflected radiation intensity of the effective measurement points; the image geometric correction module is used for carrying out geometric correction on the aerial image based on the space position coordinates and the flight attitude data to generate a digital orthographic image; The zonal analysis module is used for determining non-coincident zonal regions based on the digital orthophoto map; The global albedo fusion module is used for calculating the overall albedo of the photovoltaic power station based on the single-point albedo of the effective measurement points in each non-coincident navigation belt region.

Description

Method and system for testing albedo of unmanned aerial vehicle cruising photovoltaic power station Technical Field The invention belongs to the technical field of new energy detection, and relates to an albedo testing method and system for an unmanned aerial vehicle cruising photovoltaic power station. Background Photovoltaic power plants are rapidly evolving worldwide as a renewable energy technology important to cope with climate change. However, the remarkable change of the earth surface albedo gradually attracts public attention, firstly, ecological environment possibly exists and influence on climate change in local areas is possible, secondly, the earth surface albedo can improve the power generation efficiency of the photovoltaic power station to a certain extent, and thirdly, the ash accumulation and snow accumulation degree of the photovoltaic module can be reflected. However, the existing albedo testing method has the defects that a meteorological monitoring station is arranged near a factory of a large-scale photovoltaic power station, but single-point measurement ignores the comprehensive influence of complex surface characteristics of the ground surface under the monitoring point and the whole power station including photovoltaic modules, channels, roads, vegetation and the like, so that the albedo calculation error is large, and the whole albedo of the power station cannot be accurately reflected. This cannot accurately reflect the important climate parameter of the surface albedo of the photovoltaic power station, cannot quantify the contribution of the surface albedo to the power generation efficiency, and lacks quantitative indexes of the ash and snow degree of the surface area of the photovoltaic panel. In addition, the fixed weather monitoring station has the problems of small coverage area, large deviation from specific weather conditions of nearby projects, incapability of conveniently monitoring atmospheric temperatures at different heights and the like. Disclosure of Invention The invention provides a method and a system for testing the albedo of an unmanned aerial vehicle cruising photovoltaic power station, which solve the problems in the prior art, and realize high-precision and high-efficiency measurement of the albedo of the photovoltaic power station. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: In a first aspect, the invention provides an albedo testing method for an unmanned aerial vehicle cruising photovoltaic power station, which comprises the following steps: Synchronously acquiring space position coordinates, flight attitude data, incident radiation intensity, reflected radiation intensity and aerial images of all measurement points through an unmanned aerial vehicle; Judging the validity of the measurement points according to a preset flight attitude angle threshold value, and eliminating invalid measurement points of flight attitude data exceeding the flight attitude angle threshold value; Calculating a single point albedo based on the incident radiation intensity and the reflected radiation intensity of the effective measurement point; performing geometric correction on the aerial image based on the space position coordinates and the flight attitude data to generate a digital orthophoto map; Determining a non-coincident band region based on the digital orthophotomap; And calculating the overall albedo of the photovoltaic power station based on the single-point albedo of the effective measurement points in each non-coincident aeroband region. Preferably, the incident radiation intensity is collected through an incident radiation sensor arranged above the unmanned aerial vehicle body, the induction surface of the incident radiation sensor is more than or equal to 10cm away from the top of the unmanned aerial vehicle body, the reflected radiation intensity is collected through a reflected radiation sensor arranged below the unmanned aerial vehicle body, and the induction surface of the reflected radiation sensor is more than or equal to 30cm away from the bottom of the unmanned aerial vehicle body. Preferably, the aerial image is photographed by a camera, and the field angle of the lens of the camera is matched with the ground monitoring range of the reflected radiation sensor. Preferably, the width of the aeroband region is dynamically adjusted according to the ground projection range of the reflected radiation sensor, and the adjustment formula is as follows: in the formula, The width of the navigation belt area is m; the real-time flying height is given by m; for the field angle of the reflected radiation sensor, the unit is. Preferably, in the cruising path of the unmanned aerial vehicle, the coincidence rate between adjacent navigation belt areas is 60% -70%. Preferably, the preset flight attitude angle threshold is 15 degrees, and when the pitch angle or roll angle of the unmanned aerial vehicle is larger th