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Photovoltaic hot spot effect detection method for electricity-graph model

A detection method and hot spot effect technology, which is applied in the field of photovoltaic hot spot effect detection of electro-graphic models, can solve the problems of detection, low detection accuracy and accuracy, low detection accuracy and efficiency, etc.

Inactive Publication Date: 2015-05-06
CHONGQING UNIV
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Problems solved by technology

However, this method has some defects: a. It cannot distinguish the state of insignificant temperature difference, and the detection accuracy and accuracy are not high; b. It cannot detect the fault in time when the hot spot effect is about to appear on the photovoltaic panel, and the real-time performance is poor. And it is not easy to realize online fault analysis and alarm, etc.
At the current stage, the detection accuracy and efficiency of this method are relatively low.

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  • Photovoltaic hot spot effect detection method for electricity-graph model
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[0047] Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the protection scope of the present invention.

[0048] figure 1 It is a flowchart of photovoltaic hot spot effect detection method based on electro-graphic model, figure 2 Is the electro-graphic model diagram, image 3 Is the flow chart of the infrared thermal image segmentation algorithm, Figure 4 The infrared thermal image after the hot spot effect of photovoltaic panels is segmented, as shown in the figure: The method for detecting hot spot effect of photovoltaic panels based on the electro-graphic model provided by the present invention includes the following steps:

[0049] S1: Collect electrical signals (voltage signals, current signals) and infrared thermal image output from photovoltaic panels;

[0050] S2: Obse...

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Abstract

The invention discloses a photovoltaic hot spot effect detection method for an electricity-graph model and belongs to the field of photovoltaic power generation. The photovoltaic hot spot effect detection method for the electricity-graph model includes that firstly, regarding a photovoltaic cell panel as a whole body to build the electricity-graph model, wherein the electricity-graph model is built according to output voltage signals, load current signals and the like electric signals of the photovoltaic cell panel and infrared thermograms gathered by a thermal infrared imager; secondly, using the model to detect the running state of the photovoltaic cell panel and timely forecast and discover the hot spot effect of the battery panel. The potential safety hazard of a photovoltaic system due to delayed maintenance is avoided, and the reliability and stability of a photovoltaic power generation system are further improved.

Description

Technical field [0001] The invention relates to the field of photovoltaic power generation system fault detection, in particular to a photovoltaic hot spot effect detection method of an electro-graphic model. Background technique [0002] As the "energy security crisis" becomes more and more prominent, solar energy, as a pollution-free, renewable and environmentally friendly new energy source, has occupied a very important position in the energy field. However, the working stability and output power of solar (also called photovoltaic) power plants are closely related to the working status of each photovoltaic panel. How to effectively monitor and diagnose faults for each photovoltaic panel is the first to maintain normal operation of photovoltaic power plants. problem. [0003] The hot spot effect is a major failure phenomenon that easily occurs during the operation of photovoltaic panels. Specifically, when the light is uneven, the photovoltaic panel is shaded, the quality of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/10
CPCH02S50/00Y02E10/50
Inventor 段其昌毛明轩段盼胡蓓
Owner CHONGQING UNIV
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