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Photovoltaic hot spot effect detection method based on electro-graphic 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 poor real-time performance, detection, low detection accuracy and accuracy, and achieve improved accuracy and real-time performance. The effect of applying the foreground

Inactive Publication Date: 2017-08-08
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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[0047] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0048] figure 1 It is a flow chart of a photovoltaic hot spot effect detection method of an electro-graph model, figure 2 is the diagram of the electro-graphic model, image 3 It is the flow chart of the infrared thermal image segmentation algorithm, Figure 4 Infrared thermal images after segmentation of the hot spot effect of the photovoltaic cell panel, as shown in the figure: the method for detecting the hot spot effect of the photovoltaic cell panel based on the electro-graphic model provided by the present invention comprises the following steps:

[0049] S1: Collect the voltage signal and current signal output by the photovoltaic panel and the infrared thermal...

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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 fault detection of photovoltaic power generation systems, in particular to a photovoltaic hot spot effect detection method of an electro-graph model. Background technique [0002] With the "energy security crisis" becoming more and more prominent, solar energy, as a non-polluting, renewable and environmentally friendly new energy, has already occupied a very important position in the energy field. However, the stability and output power of solar (also known as 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 most important thing to maintain the normal operation of photovoltaic power plants. question. [0003] Hot spot effect is a major failure phenomenon that is prone to occur during the operation of photovoltaic panels. Specifically, in the case of uneven illumination, shaded photovol...

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Application Information

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Patent Type & Authority Patents(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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