Optical telemetering method for ground-to-ground lightning return stroke current

Abstract

The invention relates to an optical telemetering method for a ground-to-ground lightning return stroke current, which comprises the following steps of performing sequence interpolation or extraction on a large amount of ground-to-ground lightning return stroke current obtained by long-term actual observation and radiation light of the ground-to-ground lightning return stroke current, adjusting the ground-to-ground lightning return stroke current and the radiation light into sequence signals with the same sampling rate, and respectively taking the sequence signals as output and input data of a nonlinear autoregression model with external input to perform NARX model training, obtaining a radiation light signal of a new ground-to-ground lightning return stroke current by using a high-speed optical observation system, and after interpolation or extraction, adjusting the radiation light signal into a sequence signal with the same sampling rate as sample data during NARX model training, multiplying the obtained new radiation light signal by a light intensity distance correction factor, performing light signal correction, and providing input data for the trained NARX model, and inputting the corrected new radiation light signal into the trained NARX model, and outputting a return stroke current of optical measurement. The method does not need to enter a current channel in series or surround the current channel, the installation and debugging process is simple, and external electromagnetic interference is avoided.

Description

technical field [0001] The invention is applied to the technical field of lightning characteristic observation, in particular to an optical telemetry method for ground lightning return stroke current, which can realize the non-electromagnetic interference measurement of the return strike current. Background technique [0002] The return stroke current is the basis for lightning recognition and protection. It is generally characterized by parameters such as peak value, maximum current change rate, waveform front, duration, half-peak width, and total transferred charge. To achieve an accurate description of the current, it must be based on a large number of observational data. For example, Wang Fei and others pointed out in the article "A Review of the Measurement of Ground Flashback Current" that the ground lightning return current is an important characteristic parameter of lightning, and the accumulation of its measurement data is of great significance to the improvement of...

AI Technical Summary

Problems solved by technology

At present, there is no report on the optical telemetry method that can be used for the lightning return stroke current

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