Modeling of different charge transfer modes in upward flashes constrained by simultaneously measured currents and fields

He, Lixia (Institute of Electrical Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland) ; Azadifar, Mohammad (Institute of Electrical Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland) ; Li, Quanxin (Institute of Electrical Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland) ; Rubinstein, Marcos (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland) ; Rakov, Vladimir A. (Department of Electrical and Computer Engineering, University of Florida, Florida, USA) ; Mediano, Arturo (Departement Electronics and Communication Engineering, University of Zaragoza, Zaragoza, Spain) ; Pavanello, Davide (School of Engineering, HES-SO Valais-Wallis, HEI, HES-SO // University of Applied Sciences Western Switzerland) ; Paolone, Mario (Institute of Electrical Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland) ; Xing, Hongyan (Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing University of Information Science and Technology, Nanjing, China) ; Rachidi, Farhad (Institute of Electrical Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland)

The purpose of the paper is to investigate charge transfer modes in upward lightning flashes by means of numerical simulation constrained by concurrent observations of electromagnetic fields and currents. In particular, we focus on different types of pulses occurring in upward negative flashes. The MTLE return stroke model is used to compute the electric fields associated with return strokes and mixed-mode pulses, while the M-component model of Rakov et al. (1995) is used to compute electric fields associated with M-components and Mcomponent-type ICC pulses. The simulation results are constrained by experimental data consisting of simultaneous records of lightning currents and electric fields associated with upward flashes at the Säntis tower. The inferred velocities for Mcomponent and M-component-type ICC pulses range from 2.0x107 m/s to 9.0x107 m/s, and the corresponding junction point heights range from 1.0 km to 2.0 km. The inferred pulse velocities for return strokes and mixed-mode pulses range from 1.3x108 m/s to 1.65x108 m/s. The inferred current attenuation constants of the MTLE model obtained in this study range from 0.3 km to 0.8 km, lower than the value of 2.0 km suggested in previous studies. The obtained results confirm the similarity of mixed-mode charge transfer to ground with return strokes on the one hand, and of the M-component-type ICC with classical M-components mode of charge transfer on the other hand.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEI-VS
HEIG-VD
Institute:
IICT - Institut des Technologies de l'Information et de la Communication
Institut Systèmes industriels
Subject(s):
Ingénierie
Publisher:
Singapore, Singapore, 14-18 May 2018
Date:
2018-05
Singapore, Singapore
14-18 May 2018
Pagination:
5 p.
Published in:
Proceedings of 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), 14-18 May 2018, Singapore, Singapore
DOI:
ISBN:
978-1-5090-5997-3
Appears in Collection:

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 Record created 2019-01-15, last modified 2019-01-15

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