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A Method of Obtaining Lightning Parameters Using the Measured Lightning Vertical Electric Field

A vertical electric field and lightning technology, applied in the direction of electromagnetic field characteristics, measurement of electrical variables, measurement devices, etc., can solve problems such as difficult distribution of charge density

Active Publication Date: 2019-03-05
TSINGHUA UNIV
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Problems solved by technology

Since the charge density distribution in the lightning channel is difficult to actually measure, it can only be determined by indirect methods

Method used

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  • A Method of Obtaining Lightning Parameters Using the Measured Lightning Vertical Electric Field
  • A Method of Obtaining Lightning Parameters Using the Measured Lightning Vertical Electric Field
  • A Method of Obtaining Lightning Parameters Using the Measured Lightning Vertical Electric Field

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Embodiment Construction

[0112] A method for obtaining lightning parameters by using the measured lightning vertical electric field proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0113] The present invention proposes a method for obtaining lightning parameters by using the measured lightning vertical electric field, wherein the lightning parameters include: lightning base current, return velocity and lightning channel charge density distribution. The overall process of the method is as follows figure 1 shown, including the following steps:

[0114] 1) Obtain the long-distance measured lightning vertical electric field data (and also obtain the measured lightning base current data) by using the artificial lightning method, and smooth and denoise the measured lightning vertical electric field data to eliminate the noise signal in the measured lightning vertical electric field data, and obtain Measure ...

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Abstract

The invention provides a method for obtaining lightning parameters by utilizing an actual-measured lightning vertical electric field. The method belongs to the technical field of thunder and lightning monitoring in the field of electrical engineering. The method comprises the steps of acquiring remote actual-measured lightning vertical electric field data through an artificially trigged lightning method, performing smooth denoising on the actual-measured lightning vertical electric field data, eliminating noise signals in the actual-measured lightning vertical electric field data, and obtaining actual-measured lightning vertical electric field fragments; considering a reflecting action of soil on which an electric field measurement point is located, confirming an expression of a soil attenuation function in a time domain, and then utilizing a particle swarm algorithm for searching to obtain an optimal lightning base current and return stroke velocity; finally calculating to obtain the distribution of electric density in a lightning channel. The method provided by the invention overcomes the defect of difficulties in direct measurement of the lightning base current, and direct measurement of the return stroke velocity and the electric density of the lightning channel, is wide in applicable range, and is contribute to an electrical power system to adopt a more effective lightning protection measure.

Description

technical field [0001] The invention belongs to the technical field of lightning monitoring in the field of electric engineering, and in particular relates to a method for obtaining lightning parameters by using actually measured lightning vertical electric fields. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
CPCG01R29/0842
Inventor 何金良余占清杨滚陈水明
Owner TSINGHUA UNIV
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