Parametric Reconstruction Method for the Long Time-Series Return-Stroke Current of Triggered Lightning Based on the Particle Swarm Optimization Algorithm

Abstract

The lightning research group of the Chinese Academy of Meteorological Sciences has carried out observations and experiments with artificially triggered lightning for more than ten years, and it accumulated thousands of examples of channel base current data on the return stroke of artificially triggered lightning prior to 2020. Based on the current data, this paper explores ways of improving the constructed function of a long time-series (400) return stroke and the parametric reconstruction of the current waveform. The long time-series current can be divided into three components: the breakdown pulse current, corona current and quasi-uniform current. The corona current and quasi-uniform current are constructed by a Heidler function, while the breakdown pulse current is determined by the waveform characteristics of the current peak, which can be divided into the Heidler type and high-order exponential type. According to the three-component model of the return-stroke current, a two-step parametric reconstruction method for the long time-series lightning return-stroke current based on the particle swarm optimization (PSO) algorithm is proposed. In this paper, the results of the parameterized reconstruction of 14 return strokes are given, and the results of the multidimensional error analysis of 13 long time-series return strokes are given to illustrate the accuracy of the improved parameterized model of the return-stroke current and the effectiveness of the two-step reconstruction method based on the PSO algorithm.

Channel Development and Electric Parameter Characteristics of Regular Pulse Bursts in Lightning

“…(2018, 2021) and Fan, Zhang, et al. (2020) introduced empirical mode decomposition (EMD) (Huang & Wu, 2008; Huang et al., 1998, 1999; Rilling et al., 2003) to the analysis of LF/VLF electric field signals of lightning. Low frequency filtering and high‐frequency noise reduction is applied to the electric field waveforms in 1 ms segments to determine the 3‐dimensional structure and development of flashes.…”

Cross-Correlation Wavelet-Domain-Based Particle Swarm Optimization for Lightning Mapping

“…Guo et al [22] proposed a two-step procedure that uses the PSO algorithm to optimize the lightning positions (i.e., 2D space). Alternatively, Fan et al [23] proposed a PSO-based technique to optimize the reconstruction process of the return stroke current waveform. For the cross-correlation-based methods, the selection of appropriate sliding widow length could influence the performance of the lightning mapping system.…”