Current magnetic field-based multi-power transmission line parameter measuring method

A transmission line and parameter measurement technology, applied in the direction of measuring devices, measuring magnetic variables, electrical digital data processing, etc., can solve problems such as the difficulty in arranging circular sensor arrays, and achieve the effect of reducing the impact

Active Publication Date: 2019-09-20
TSINGHUA UNIV +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to arrange a circular sensor array, and the realization of the spatial Fourier transform requires the transmission line to be tested to be located in the center of the sensor array

Method used

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  • Current magnetic field-based multi-power transmission line parameter measuring method
  • Current magnetic field-based multi-power transmission line parameter measuring method
  • Current magnetic field-based multi-power transmission line parameter measuring method

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Embodiment Construction

[0030] Hereinafter, the present invention will be clearly and completely described with reference to the accompanying drawings. However, it should be understood that the following description is exemplary only, and is not intended to limit the present invention to the following examples.

[0031] Aiming at the problems existing in the existing measurement methods of power system transmission line parameters based on shunt resistors or current sensors, such as the difficulty in achieving electrical insulation, the large size of the measurement device, and the difficulty of narrow measurement range and frequency band, a new method based on Multi-transmission line parameter measurement method for current and magnetic fields. By arranging magnetic field sensors around the transmission line, collecting the magnetic field strength measured by the magnetic field sensor, and inverting the current and position parameters of the transmission line, the high-precision and wide-band measur...

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Abstract

The invention discloses a current magnetic field-based multi-power transmission line parameter measuring method. The method includes the following steps that: a plurality of magnetic field sensors are arranged, so that magnetic field intensity measurement values at the locations of the plurality of magnetic field sensors are acquired; magnetic field intensity theoretical values at the locations of the plurality of magnetic field sensors are obtained according to the ampere loop law; an equation for calculating the magnetic field intensity theoretical values is converted into a linear regression equation; the linear regression equation is solved, so that a coefficient is obtained, the parameters of a plurality of power transmission lines are expressed as the function of one parameter of one power transmission line in the plurality of power transmission lines; an optimization function is established according to the magnetic field intensity measurement values and theoretical values at the locations of the magnetic field sensors; and the optimization function is solved, and the parameter is obtained.

Description

technical field [0001] The invention belongs to the field of intelligent algorithms, in particular to a method for measuring multiple transmission line parameters (current and position) based on current and magnetic fields. Background technique [0002] With the continuous development of the economy and society, the requirements for power quality continue to increase, and building a reliable, safe, clean, and economical smart grid has been listed as an important development strategy by more and more countries. In order to better ensure the power quality and realize the real-time and accurate description of the grid state, more and more attention has been paid to the current measurement method of each transmission line in the power system. In order to take into account the normal operation and failure of the power system, the current measuring device is required to measure not only normal AC and DC currents, but also medium and high frequency transient signals, and the range ...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R33/09G01R33/10G01R15/20G06F17/50G06F17/11
CPCG01R31/085G01R33/098G01R33/10G01R15/20G06F17/11G06F30/20
Inventor 胡军赵根吴阳欧阳勇王博张波余占清曾嵘何金良马慧远于希娟
Owner TSINGHUA UNIV
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