TITLE:
Study and FDTD Modeling of the Influence of Direct Lightning Shock on the Power Transmitted by a High-Voltage Power Transmission Line
AUTHORS:
Anthony Bassesuka Sandoka Nzao, Tsasa Mbenza Makwala Jean-Pierre
KEYWORDS:
Modeling, Direct lightning Strike, Lightning Current, Induced Overvoltages, Transmitted Power, HV Line, Kirchhoff Equations, Coupling Equation, Bi-Exponential Model, Agrawal Model, Engineers’ Model, Transmission Line Theory, Maxwell’s Equation, FDTD Method
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.12,
December
27,
2024
ABSTRACT: Electric towers of high voltage transmission lines are more exposed to natural lightning phenomena thanks to their high heights. These lines are crossed by powerful current sources to dissipate in the ground, which can, at one time or another, create disturbances or other phenomena can be generated. This is why we have set ourselves the objective of studying the FDTD modeling of the influence of direct lightning strikes on the power transmitted by a High-Voltage power line. To do this, we have implemented Kirchhoff’s laws to model the power transmitted by a High-Voltage power line in a steady state. Calculating the electromagnetic field generated by lightning requires the lightning current along the channel and its spatiotemporal distribution, the bi-exponential models and that of engineers were chosen and used to reproduce the physical phenomena best. Several works have been published in the literature and various mathematical models are proposed, to study the filamentous nature of power lines which has led to a more flexible modelling, based on the transmission line model, associated with the field theory developed from Maxwell’s equations, which explain the interaction between a lightning wave and a power transmission line. The resolution of the line equations in the lightning shock regime was the subject of the FDTD method to obtain the results in the spatio-temporal domain. Through this research, we are interested in the study of the spatiotemporal distribution of the lightning current wave to model the radiated electromagnetic field and to examine the influence of the overvoltage induced by the atmospheric discharge on the transportable power of a High Voltage AC Transmission line, for good selective protection to illuminate the parasites. 2D simulations based on proposed models were developed as well as the verification of the consistency of the different models, by comparing the fractal dimensions of the results of our program with those of the figures obtained experimentally. The aspects developed in this article could have direct implications in practical applications in the engineering and design of high-voltage transmission systems.