An online non-contact detection method for the density of sand attached to the surface of an insulator
A detection method and technology for insulators, which are applied in the measurement of color/spectral characteristics, etc., can solve the problems of difficulty in accurately evaluating and analyzing the influence of insulation performance, affecting the normal transmission and distribution of power systems, and complex operation, and achieve good consistency of test results. , reliable test basis, simple operation effect
Active Publication Date: 2020-09-18
SOUTHWEST JIAOTONG UNIV
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The problems with this method are: 1. The insulator needs to be removed, cleaned, and weighed. The operation is complicated and involves many links, and deviations are likely to occur during the operation.
2. On-site power outage operation is necessary, which seriously affects the normal transmission and distribution of the power system, making it difficult to implement
3. It cannot reflect the local maximum value of dust on the surface of the insulator, which makes it difficult to accurately evaluate and analyze the impact of the current state of sand on its insulation performance, and cannot provide a reliable test basis for the maintenance of insulators
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0033] A specific embodiment of the present invention is an online non-contact detection method for the density of sand attached to the surface of an insulator, which includes the following steps:
[0034] A. Obtaining the hyperspectral lines of the insulating sheet with known sand density
[0035] Use the same material of the insulator to make a sheet-shaped insulating sheet i, and evenly adhere sand and dust on the insulating sheet i, so that the sand density of the insulating sheet i is Si; use a hyperspectral imager to photograph the insulating sheet i, and get the attached Hyperspectral image X of sand density Si" i , X" i =[x" i,1 ,x" i,2 ,...,X" i,n ,...,X" i,N ]; Among them, i is the serial number of the insulating sheet, i=1, 2, 3...I, I is the number of insulating sheets, the value is 10-500, n=1, 2, 3...N, N Is the total number of bands of hyperspectral lines, and its value is 64-256; x” i,n Hyperspectral image X with sand density Si" i Reflectivity under the nth band i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an online non-contact detection method for the density of sand attached to the surface of an insulator, which first establishes a detection model of the sand attached density according to the hyperspectral images of insulating sheets with different sand attached densities, and then obtains the hyperspectral image of the insulator to be detected ; Then get the sand density on the surface of the insulator from the detection model of the sand density. This method can detect the sand density on the surface of the insulator in the transmission line online without power failure, without affecting the normal power transmission and distribution of the power system. The impact of the state of attached sand on the insulation performance of insulators can provide a more reliable test basis for the insulation design and maintenance of insulators.
Description
Technical field [0001] The invention relates to a method for detecting the density of sand attached to the surface of an insulator. Background technique [0002] Sandstorms are disastrous weather that often occurs in arid and semi-arid areas. In my country, strong winds and sandstorms (sandstorms) often occur in the northwestern sand source area, and the sand and dust will naturally settle after the wind stops. In the meantime, the fine dust particles will also be transmitted to many provinces such as Anhui, Jiangsu and Shanghai in the south through high altitude and long distance. Under humid conditions, sand and dust are easy to adhere to the surface of the insulators in the transmission and distribution system to form attached sand. Studies have shown that the insulation performance (flashover voltage) of insulators with sand on the surface drops by 15.1% under certain humidity conditions. It can be seen that the frequent occurrence of sandstorms puts forward higher require...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 吴广宁张晓青张血琴郭裕钧邱彦马欢高润明李宇
Owner SOUTHWEST JIAOTONG UNIV