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Ultra-long distance lightning intensity inversion algorithm considering influence of earth curvature radius

An earth curvature, ultra-long-distance technology, applied in the direction of AC/pulse peak measurement, etc., can solve the problem of not being able to obtain the characteristics of the long-distance lightning electromagnetic field

Pending Publication Date: 2021-12-28
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0007] This application provides an ultra-long-distance lightning intensity inversion algorithm considering the influence of the earth's curvature radius to solve the problem that traditional methods cannot obtain accurate long-distance lightning electromagnetic field characteristics

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  • Ultra-long distance lightning intensity inversion algorithm considering influence of earth curvature radius
  • Ultra-long distance lightning intensity inversion algorithm considering influence of earth curvature radius
  • Ultra-long distance lightning intensity inversion algorithm considering influence of earth curvature radius

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Embodiment Construction

[0046] In order to facilitate the description and understanding of the technical solution of the application, the technical solution of the application will be further described below in conjunction with the drawings and embodiments.

[0047] In the following, the existing methods for estimating the peak value of lightning current suitable for short distances are described firstly.

[0048] Cloud-ground lightning (referred to as ground lightning) is the most common type of lightning, and its discharge channel is between 4-10km, with a typical value of about 5km. When the ground lightning discharge process begins, there is a current pulse in the entire channel, which starts from the ground and transmits upwards. Therefore, the entire discharge channel is similar to a radiation antenna, and there is a positive correlation between the lightning electromagnetic radiation field and the channel current in different distance ranges. Usually, the estimation of the peak value of the l...

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Abstract

The invention relates to an ultra-long distance lightning intensity inversion algorithm considering the influence of the earth curvature radius, and the algorithm comprises the steps: carrying out the normalization of lightning signals at different distances from an observation point to a preset distance according to the propagation law of a lightning electromagnetic field along the earth surface; if the distance between the lightning signal and the observation point is greater than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1.32 along with the increase of the observation distance d; if the distance between the lightning signal and the observation point is less than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1 along with the increase of the observation distance d; when thunder and lightning occur, acquiring a magnetic field intensity peak value of the thunder and lightning at the observation point; and inverting a lightning current peak value according to the magnetic field intensity peak value. The lightning current peak value estimation model established by the algorithm provides technical support for service applications such as thunder and lightning detection and early warning and forecasting of disastrous weather.

Description

technical field [0001] The present application relates to the field of lightning electromagnetic wave propagation and lightning detection technology, in particular to an ultra-long-distance lightning intensity inversion algorithm considering the influence of the radius of curvature of the earth. Background technique [0002] On a global scale, hundreds of lightning strikes occur every second, and frequent lightning strikes will release electromagnetic waves with frequencies ranging from extremely low frequency to ultrahigh frequency. In actual work, researchers can use different detection instruments to detect lightning radiation corresponding to different wave bands, and then determine the spatial position of lightning discharge and parameters such as discharge parameters. However, because electromagnetic waves in different frequency bands will be affected by factors such as soil conductivity, surface ups and downs, and the earth's ionospheric dielectric during transmission...

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Application Information

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IPC IPC(8): G01R19/04
CPCG01R19/04
Inventor 马仪文刚潘浩孟见岗刘全涛周仿荣马御棠
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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