scholarly journals Calculation of the channel discharge function for the generalized lightning traveling current source return stroke model

Filomat ◽  
2018 ◽  
Vol 32 (20) ◽  
pp. 6937-6951 ◽  
Author(s):  
Dragan Pavlovic ◽  
Gradimir Milovanovic ◽  
Jovan Cvetic
Keyword(s):  
Transmission Line ◽  
Numerical Method ◽  
Current Source ◽  
Stroke Model ◽  
Propagation Models ◽  
Return Stroke ◽  
Current Generation ◽  
Special Cases ◽  
Stroke Models ◽  
Source Models

The generalized lightning traveling current source return stroke model (also called GTCS model) represents generalization of all engineering lightning return stroke models that is generalization of the transmission line (TL models, also called current propagation models) and traveling current source models (TCS models, also known as current generation models). The channel discharge function was introduced and calculated for special cases within the GTCS model. We applied new numerical method for the calculation of the channel discharge function. The proposed method is highly accurate, extremely efficient and relatively simple.

Corona current concept in lightning return-stroke models of engineering type

2010 ◽  
Vol 59 (3-4) ◽  
pp. 177-188
Author(s):  
Grzegorz Masłowski
Keyword(s):  
Lightning Discharge ◽  
Current Source ◽  
Current Concept ◽  
Relaxation Model ◽  
Charge Motion ◽  
Return Stroke ◽  
Corona Current ◽  
Lightning Channel ◽  
Stroke Models

Corona current concept in lightning return-stroke models of engineering typeA role of radial corona current in a lightning discharge is discussed in the paper. It is shown that the corona current concept previously introduced by Cooray for lightning return stroke models of distributed-current-source (DCS) type, and later, by Maslowski and Rakov for lumped-current-source (LCS) type models enables to show duality between these two types of models. Further, it is demonstrated that the corona current is useful during consideration of dynamics of the lightning-channel corona sheath. As an example of application of presented approach a relaxation model of charge motion in the corona sheath is analysed together with plots which show the rate of expansion and shrinkage of the lightning corona sheath on both microsecond and millisecond time scales.

scholarly journals Lightning Return-Stroke Transmission Line Modelling Based on the Derivative of Heidler Function and CN Tower Data

2021 ◽  
Author(s):  
Mariusz Milewski
Keyword(s):  
Transmission Line ◽  
Telecommunication Networks ◽  
Stroke Model ◽  
Return Stroke ◽  
Measured Current ◽  
Lightning Current ◽  
Current Parameter ◽  
Measured Field ◽  
Current Characteristics ◽  
Current Derivative

One of the most important parameters in a lightning flash that is of interest to researchers is the lightning return-stroke current as it causes most of the destructions and disturbances in electrical and telecommunication networks. In most cases, the lightning return-stroke current can not be directly measured and current characteristics are determined from measured electric and magnetic fields through the use of lightning return-stroke models. The main objective of this work is the development of a lightning return-stroke model for an elevated object. Also, an important objective is the correlation of the wavefront parameters (peak, maximum rate of rise and risetime) of the return-stroke current with the wavefront parameters of its associated lightning electromagnetic pulse (LEMP), measured 2 km north of the tower. The developed field-current parameter relationships for CN Tower lightning return strokes are compared with those obtained from measurements conducted at the Peissenberg Tower in Germany. A 3-section transmission line (TL) model of the CN Tower, along with the derivative of the modified Heidler function, is used to simulate the measured current derivative signal. Then, the spatial-temporal distribution of the lightning current along the CN Tower and the lightning channel, during the lightning return-stroke phase, is determined. The presented model simulates the measured current derivative signal instead of the current as has been used by other researchers. The use of the derivative of the modified Heidler function to simulate the lightning current derivative proved to be superior than simulating the lightning current. For the quantitative assessment of the proposed model, a comparison between the simulated field, obtained through the usage of Maxwell’s equations and the simulated current, and the measured field is performed. The developed 3-section TL model based on the measured current derivative and the derivative of the modified Heidler function produced a simulated magnetic field that is much closer to the measured field in comparison with previous models. The developed field-current parameter relationships as well as the experimentally verified lightning return-stroke model can contribute to solving the inverse-source problem, one of the most challenging problems in lightning research, where the lightning current characteristics are estimated based on the characteristics of the measured LEMP.

Dynamics of a lightning corona sheath—A constant field approach using the generalized traveling current source return stroke model

2012 ◽  
Vol 117 ◽  
pp. 122-131 ◽  
Author(s):  
Jovan Cvetic ◽  
Fridolin Heidler ◽  
Slavoljub Markovic ◽  
Radovan Radosavljevic ◽  
Predrag Osmokrovic
Keyword(s):  
Current Source ◽  
Constant Field ◽  
Stroke Model ◽  
Return Stroke ◽  
Field Approach

Dynamics of a Lightning Channel Corona Sheath Using a Generalized Traveling-Current-Source Return Stroke Model—Theory and Calculations

2010 ◽  
Vol 52 (3) ◽  
pp. 646-656 ◽  
Author(s):  
Milica Tausanovic ◽  
Slavoljub Markovic ◽  
Srdjan Marjanovic ◽  
Jovan Cvetic ◽  
Marko Cvejic
Keyword(s):  
Model Theory ◽  
Current Source ◽  
Stroke Model ◽  
Return Stroke ◽  
Lightning Channel

A review of return-stroke models based on transmission line theory

2015 ◽  
Vol 136 ◽  
pp. 52-60 ◽  
Author(s):  
Alberto De Conti ◽  
Fernando H. Silveira ◽  
Silvério Visacro ◽  
Thiago C.M. Cardoso
Keyword(s):  
Transmission Line ◽  
Transmission Line Theory ◽  
Return Stroke ◽  
Stroke Models ◽  
Line Theory
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