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