Inversion method for parameters of wires at special pole and tower positions of electric transmission line based on current magnetic field

A transmission line and parameter inversion technology, applied in the field of intelligent algorithms, can solve the problems of difficult operation and high cost, and achieve the effect of improving intelligence and realizing intelligence

Active Publication Date: 2019-01-01
STATE GRID SHAANXI ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this UAV inspection method requires specific staff to control the UAV to fly along the route. The operation has certain difficulties, requires special technical personnel, and the cost is high. It cannot fundamentally solve the problem of the poor geographical environment Transmission line inspection problems

Method used

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  • Inversion method for parameters of wires at special pole and tower positions of electric transmission line based on current magnetic field
  • Inversion method for parameters of wires at special pole and tower positions of electric transmission line based on current magnetic field
  • Inversion method for parameters of wires at special pole and tower positions of electric transmission line based on current magnetic field

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] First, the measurement and sampling part of the magnetic field sensor is composed of a three-axis magnetic field sensor carried by the drone. The magnetic field sensor collects the magnetic field intensity information at this point in the space at the same time interval t, after filtering, amplifying, AD conversion, and inputting the position information at that time to the subsequent module for processing. The segmented inversion part of the line accumulates N sets of magnetic field strength measurement values ​​and position information, and then uses the infinite straight wire model to perform inversion to obtain the line position and current information in the section. The adaptive step length adjustment part judges whether to adjust the step length N according to the error value of the inversion result, that is, the difference between the calculated magnetic field and the actual magnetic field under this parameter, so as to improve the accuracy of the subsequent inver...

Embodiment 2

[0056] Mount the three-axis sensor on the UAV, sample the magnetic field intensity information of the point in the space at intermediate time intervals during the flight of the UAV, and the signal obtained after processing by the filter circuit, the amplifier circuit, and the AD conversion circuit and the position of the point The information is also passed to the subsequent processing part for processing.

Embodiment 3

[0058] On the basis of Example 2,

[0059] figure 2 Is a schematic diagram of the established straight traverse inversion model, such as figure 2 As shown, the inversion model of the line is based on the geometric relationship and the Biot-Sarvart law to establish the correlation model of the space magnetic field and the straight wire of the magnetic field source. The model abstracts the line wires into several different parameters.

[0060] In the inversion model of the line, suppose that the wire L is located in a plane S parallel to the horizontal plane with a height of H, the equation in the plane is ax+by+c=0, and the coordinate of the measurement point A is (x r , Y r ,z r ), then the coordinates of point B are (x r , Y r , H). From the wire position equation, the coordinates of point C can be solved as And have the following geometric relations,

[0061]

[0062]

[0063]

[0064] Let the wire current direction vector be For the infinite straight wire flowing through the ...

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Abstract

The invention provides an inversion method for the parameters of wires at special pole and tower positions of an electric transmission line based on a current magnetic field. The inversion method comprises a magnetic field sensor measuring and sampling part, line segmented inversion parts and a self-adaptive step-length adjusting part, wherein the magnetic field sensor measuring and sampling part,the line segmented inversion parts and the self-adaptive step-length adjusting part are implemented successively. The invention has the following beneficial effects: a magnetic field sensor is mounted on an unmanned aerial vehicle for measuring the magnetic field intensity data of each point in space during flight, and an unconstrained optimization algorithm is employed for segmented processing of the data; at the same time, since the situation that electric transmission lines stretch across poles, towers and corners extensively exists in reality, a self-adaptive manner is adopted for automatic adjustment of the segment length of data, so the algorithm is better intelligentized; and the positional information of the electric transmission wires obtained after inversion can be used for guiding the subsequent flight of the unmanned aerial vehicle along the line, so intelligent line inspection of the unmanned aerial vehicle can be realized.

Description

Technical field [0001] The invention relates to the field of intelligent algorithms, in particular to a method for inversion of conductor parameters of special poles and towers of transmission lines based on current magnetic field. Background technique [0002] In recent years, with the continuous development of economy and society, the demand for electric energy has continuously increased, and the scale of the transmission system has been continuously expanded. As the main component of the power transmission system, the overhead transmission line is not only large in scale, but also widely distributed. The terrain is changeable and the natural environment is complex. It is prone to failure due to lightning flashover, material aging, man-made damage and other factors, which affect the normality of the power system. run. Therefore, regular inspections of overhead transmission lines are of great significance to the safe operation of power systems. At present, the main inspection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20G01R33/02
CPCG01C21/20G01R33/02
Inventor 高峰吴经锋张晓兰冯南战孔志战薛军胡攀峰刘子瑞王勇李亚峰王晓涛王森蒲路胡军吴阳赵根张波何金良
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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