A kind of substation protection pressure plate state identification method
A technology for protecting pressure plate and state recognition, applied in character and pattern recognition, instrument, calculation, etc., can solve problems such as misoperation, and achieve the effect of improving accuracy and good state recognition effect.
Active Publication Date: 2021-06-04
CHINA THREE GORGES UNIV
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[0004] The purpose of the present invention is to provide a method for identifying the state of the substation protection pressure plate, which can accurately identify the switching / removal state of the substation protection pressure plate, and effectively solve the problem of misoperation during manual inspection
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[0075] The image resolution of the pressure plate of the secondary screen cabinet of a substation collected in this example is 1280x960 pixels, and the horizontal and vertical resolutions are 96dpi, such as image 3 shown. It can be seen from the figure that there are 14 effective pressure plates on the screen cabinet, and the corresponding identification sequence representing the switch state is 11100111011000. Extract the effective color block part through the RGB value of the image, and set the rest part as black background, the result is as follows Figure 4 As shown, and then binarize it, the result is as follows Figure 5 shown. Depend on Figure 5 It can be seen that due to the low resolution of the image and the shooting angle, the extracted effective platen areas are different and the boundaries are relatively irregular. Based on the morphological method for hole filling, the obtained image is as follows Figure 6 shown.
[0076] Calculate the morphological feat...
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A method for identifying the state of a substation protection pressure plate, collecting screen cabinet images of a function pressure plate, an outlet pressure plate, and a spare pressure plate; extracting effective color blocks from the collected image according to RGB values; performing morphological processing on the obtained image, and filling the hole area into a connected area; Analyze all connected areas, calculate the area pixel area, area boundary pixel size, area equivalent aspect ratio, etc., and perform joint comparison of thresholds to determine the number of effective platen areas; determine whether the number of effective platen screened out is equal to the known , if they are equal, continue, otherwise re-acquire the image and repeat the above process; for the effective platen area, identify the throwing and withdrawing status of each platen according to the direction angle criterion; according to the center of gravity of each area, follow the order from top to bottom and from left to right Determine the sequence of effective pressure plates, and then identify the identification sequence of the effective pressure plate throwing and withdrawing status of the screen cabinet. The invention effectively solves the problem of misoperation during manual inspection, and can provide certain technical support for the intelligent construction and operation of substations.
Description
technical field [0001] The invention belongs to the application field of the secondary side of a power system, and in particular relates to a method for identifying the state of a substation protection pressure plate. Background technique [0002] With the rapid development of my country's economy and society, the power system structure is becoming more and more complex. Especially under the widespread access of intermittent new energy, the safe and stable operation of the power system is facing greater challenges. In this context, smart substations with significant advantages are gradually becoming a hot spot for construction. In order to promote the safe, stable and efficient operation of substations, it is necessary to effectively improve the operation and maintenance level of secondary equipment, especially the inspection level of relay protection devices. As an important equipment for monitoring, controlling and relay protection operations on the primary side, the str...
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IPC IPC(8): G06K9/00G06K9/38G06K9/46
CPCG06V20/10G06V10/28G06V10/56
Inventor 付文龙胡文斌陈铁钟浩汪长林李飞李振兴李世春
Owner CHINA THREE GORGES UNIV