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Cloud cluster height estimation method and system using sky images

A sky and image technology, applied in the field of cloud height estimation, can solve problems such as lack of estimation technology

Active Publication Date: 2020-07-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a method and system for estimating the height of cloud clusters using sky images, aiming to solve the problem that the technology for estimating the height of cloud clusters in photovoltaic stations is relatively lacking at this stage

Method used

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  • Cloud cluster height estimation method and system using sky images
  • Cloud cluster height estimation method and system using sky images
  • Cloud cluster height estimation method and system using sky images

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no. 1 example

[0075] Please refer to the attached figure 1 , the present invention proposes a first embodiment of a method for estimating the height of cloud clusters utilizing sky images, comprising the following steps:

[0076] Step S110: Obtain the first sky image captured by the first sky imager and the second sky image captured by the second sky imager at the same time, wherein the first sky imager and the second sky imager are located at Different locations of the same PV plant.

[0077] as attached image 3 As stated, the first Sky Imager T 1 and Second Sky Imager T 2 At the same time, they are set on the ground of the same photovoltaic power station, separated by a certain distance (L), and the two sky imagers are located at the same level.

[0078] Step S120: Obtain the distance between the first point in the first sky image and the position of the second point in the second sky image registered with the first point according to the optical flow method.

[0079] Specifically, ...

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Abstract

The invention discloses a cloud cluster height estimation method and system using sky images. The method comprises the following steps: obtaining a first sky image shot by a first sky imager and a second sky image shot by a second sky imager at the same moment, and the first sky imager and the second sky imager are located at different positions of the same photovoltaic station; obtaining a movingdistance between a first point in the first sky image and a second point in the second sky image registered by the first point according to an optical flow method; and obtaining a height estimation value of the actual cloud cluster according to the positions of the first point and the second point; according to the method, the cloud cluster height can be estimated only through related parametersof two sky imagers, the method is simple and easy to operate, the blank of the technology for estimating the cloud cluster height of the photovoltaic station at the present stage is filled up, and therefore certain data support is provided for photovoltaic power generation power minute-level prediction.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a cloud height estimation method and system using sky images. Background technique [0002] Solar photovoltaic power generation is one of the most promising renewable energy sources at present, and has received extensive attention and rapid development from all over the world. However, solar energy is an uncontrollable energy source with great randomness and volatility. In cloudy and non-clear weather environments, the output power of photovoltaic power plants fluctuates rapidly and randomly on a minute-level time scale due to cloud movement that will block the sun to varying degrees. [0003] With the gradual increase of photovoltaic penetration in the grid, this fluctuating power output will cause significant changes in the power characteristics of the power generation and load sides, which will have a greater impact on grid dispatching and other aspects....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/55G06T7/73G06T7/33
CPCG06T7/55G06T7/73G06T7/33Y04S10/50
Inventor 甄钊玄智铭王飞米增强
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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