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Deconvolution-based method for inversion of lightning base current

A deconvolution and lightning technology, applied in the direction of only measuring current, measuring current/voltage, measuring electrical variables, etc.

Active Publication Date: 2018-05-11
TSINGHUA UNIV +1
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  • Abstract
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Problems solved by technology

[0005] An existing lightning current inversion method uses the transient voltage measured on the transmission line to invert the lightning current through the least squares deconvolution method, but this method uses the transient voltage on the transmission line, Therefore, only for the lightning current waveform at the lightning strike point near the transmission line

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  • Deconvolution-based method for inversion of lightning base current
  • Deconvolution-based method for inversion of lightning base current
  • Deconvolution-based method for inversion of lightning base current

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Embodiment Construction

[0047] A deconvolution-based lightning base current inversion method proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] A deconvolution-based lightning base current inversion method proposed by the present invention, the overall process is as follows figure 1 shown, including the following steps:

[0049] 1) Obtain the magnetic field at the magnetic field measuring point at the horizontal distance D from the lightning channel by measuring Wherein, the value range of D is 0-100km, t is time, and t=0 is the moment when lightning occurs. Conventional methods or equipment can be used for lightning electromagnetic field measurement.

[0050] In this embodiment, the curve of the horizontal magnetic field intensity (unit T) of the magnetic field measurement point changing with time t is as follows figure 2 shown; figure 2 , the time t range is [0μs, 200μs]), the horizontal...

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Abstract

The invention, which belongs to the technical field of lightning monitoring in the electrician field, provides a deconvolution-based method for inversion of a lightning base current. According to themethod, measurement is carried out to obtain magnetic field data of a magnetic field measurement point; on the basis of a relationship between a magnetic field and a lightning base current, an inversion coefficient vector of the lightning base current is calculated; and inversion is carried out by using a deconvolution inversion method. Therefore, a defect that the lightning base current can not be obtained by direct measurement is overcome. The applicable range is wide. And the power system is assisted in taking effective lightning protection measures.

Description

technical field [0001] The invention belongs to the technical field of lightning monitoring in the electrical field, and in particular relates to a lightning base current inversion method based on deconvolution. Background technique [0002] Lightning is one of the top ten natural disasters. The large current, high voltage and strong electromagnetic field it generates in an instant will not only cause human and livestock casualties, but also have a huge destructive effect on the natural resources on which human beings depend and the material wealth created by human beings. Equipment and facilities in national economic sectors such as aerospace, railway transportation, and even financial securities have caused damage. Therefore, issues such as lightning phenomena, lightning physics, lightning warning and protection are still hot research issues in the fields of atmospheric electricity, power systems, and discharge physics. [0003] When thunder and lightning (lightning) occ...

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Application Information

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IPC IPC(8): G01R19/00G01R29/08
CPCG01R19/0092G01R29/0892
Inventor 何金良胡军谷山强杨滚陈坤金余占清张波
Owner TSINGHUA UNIV