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Cloud cluster extracting method based on strength layering of foundation cloud pictures

A ground-based cloud image and extraction method technology, which is applied in image analysis, image data processing, instruments, etc., can solve problems such as cloud image degradation, photovoltaic prediction model prediction error, and cloud extraction difficulty of all-sky cloud images, so as to improve general sexual effect

Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] Due to the influence of fog and haze weather, when using the all-sky imager to collect clouds, the cloud image will be degraded due to the influence of haze on the light, which brings certain difficulties to the cloud cluster extraction of the whole-sky cloud image , which in turn brings a large prediction error to the photovoltaic prediction model based on the ground-based cloud image

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  • Cloud cluster extracting method based on strength layering of foundation cloud pictures
  • Cloud cluster extracting method based on strength layering of foundation cloud pictures
  • Cloud cluster extracting method based on strength layering of foundation cloud pictures

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] Compared with the existing technology, at present, the intensity layering method of cloud images has not been used at home and abroad to realize the extraction of ground-based cloud clusters under various meteorological conditions. There are many documents describing how to extract cloud clusters, but each method has its own advantages. Certain pertinence does not have universality under various meteorological conditions. The method proposed in this patent has strong universality and can solve the problem of ground-based cloud extraction under various meteorological conditions.

[0036] The invention provides a method for extracting cloud clusters based on the intensity layering of ground-based cloud images, the method comprising the following steps:

[0037] Step 1: Intensity stratification of the ground-based cloud image;

[0038] Step 2: Extract cl...

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Abstract

The invention provides a cloud cluster extracting method based on strength layering of foundation cloud pictures. The method comprises the following steps of performing strength layering on the foundation cloud pictures; performing cloud cluster extraction on a color spot image subjected to strength layering. The cloud cluster extracting method based on strength layering of the foundation cloud pictures is good in universality and capable of extracting cloud clusters of the all-sky foundation cloud pictures influenced by haze. Instant drop of generated power of a photovoltaic power station caused by radiation attenuation due to changing and shading of cloud cover around the photovoltaic power station in next four hours can be predicted accurately, and accuracy of photovoltaic power prediction for a super-short term can be improved.

Description

technical field [0001] The invention relates to an extraction method, in particular to a cloud cluster extraction method based on the intensity stratification of ground-based cloud images. Background technique [0002] As large-scale photovoltaic power plants are connected to the power grid in recent years, accurate prediction of the output power of photovoltaic power plants can provide important decision-making support for power dispatching, coordinate the coordination of conventional power and photovoltaic power generation, and effectively reduce power system operation. Cost, so that photovoltaic resources can be fully utilized, so as to obtain greater economic and social benefits. However, the output power of the photovoltaic power generation system largely depends on the amount of solar radiation received by the photovoltaic panel, and is easily affected by weather factors, so it has the disadvantages of intermittent, fluctuating and randomness, resulting in its output p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 朱想周海崔方程序丁杰曹潇陈志宝王知嘉周强丁宇宇谭志萍于炳霞丁煌
Owner STATE GRID CORP OF CHINA
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