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| Content Provider | IET Digital Library |
|---|---|
| Author | He, Lixia Azadifar, Mohammad Li, Quanxin Rubinstein, Marcos Rakov, Vladimir A. Mediano, Arturo Pavanello, Davide Rachidi, Farhad |
| Abstract | The authors present an analysis of different charge transfer modes during upward negative flashes. The analysis includes a total number of 94 pulses that occurred during two upward negative flashes recorded at the Säntis Tower. The pulses included 59 mixed-mode (MM) initial continuous current (ICC) pulses, 17 M-component-type ICC (M-ICC) pulses, 8 return-stroke pulses, and 10 classical M-component (MC) pulses. It is found that the initial stage of the flash is responsible for the largest share of the total charge transferred to the ground. Simulation results for the electric fields associated with the considered charge transfer modes are presented and discussed. Return stroke (RS) and MM pulses were simulated adopting the MTLE model, while MCs and M-ICC pulses were simulated using the guided wave model of Rakov et al. The simulated results are shown to be in good agreement with simultaneous records of electric fields measured at a distance of 15 km from the Säntis Tower. The inferred velocities for MCs and M-ICC pulses range from 2.0 × 107 to 9.0 × 107 m/s, and the corresponding junction point heights range from 1.0 to 2.0 km. The inferred pulse velocities for RSs and MM pulses range from 1.3 × 108 to 1.65 × 108 m/s. The inferred current attenuation constants of the MTLE model obtained in this study range from 0.3 to 0.8 km, lower than the value of 2 km previously suggested for RSs in downward flashes. The obtained results support the assumption that the mode of charge transfer to the ground giving rise to MM pulses is similar to that of RSs. The results are also in support of the generally assumed similarity between M-ICC pulses and classical MCs. |
| Starting Page | 30 |
| Ending Page | 37 |
| Page Count | 8 |
| Volume Number | 5 |
| e-ISSN | 23977264 |
| Issue Number | Issue 1, Feb (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/hve/5/1 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/hve.2019.0017 |
| Journal | High Voltage |
| Publisher | The Institution of Engineering and Technology CEPRI |
| Publisher Date | 2019-05-24 |
| Access Restriction | Open |
| Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
| Subject Keyword | Altitude 1.0 Km to 2.0 Km Atmospheric Electricity Charge Transfer Modes Classical M-component Pulses Distance 15.0 Km Downward Flashes Electric Field Europe Guided Wave Model Inferred Current Attenuation Constants Inferred Pulse Velocities Lightning M-component-type ICC Pulses Mixed-mode Initial Continuous Current Pulses MM Pulses MTLE Model Poles And Towers Return Stroke Return-stroke Pulses Size 0.3 Km to 0.8 Km Säntis Tower Total Charge Upward Negative Flashes |
| Content Type | Text |
| Resource Type | Article |
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