Some Features of Calculating the Lightning-Induced Damages to Overhead Power Line Elements
DOI:
https://doi.org/10.24160/1993-6982-2020-6-46-52Keywords:
number of lightning strikes, overhead power line, downward negative leader, upward connecting leader from an object, leader step length, streamer corona flash, striking probability, probabilistic approachAbstract
The article presents the main principles and specific features of a procedure for calculating the lightning-induced damage inflicted to power transmission line elements based on a probabilistic approach. The procedure takes into account the modern concepts on how lightning strikes at ground objects. A model simulating the development of a downward lightning leader in a manner maximally close to the real negative stepped leader development process is proposed. A scheme illustrating how a leader is targeting at a ground object has been developed. By solving the problem within the framework of 3D modeling, the possibility of a connecting leader to develop not only from the phase wires and overhead ground wires, but also from the line supports can be analyzed. Based on experimental and theoretical studies, a probabilistic approach for conditions under which the streamer corona flash transforms into an upward leader is proposed. The possibility of taking into account the natural and climatic conditions, and topography in the line route regions is considered. The elaborated procedure and the software package developed on its basis allow the places of lightning strikes at overhead power line elements and their probabilities to be predicted in the most grounded manner, which will make it possible to set up reliable overhead power line protection.
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Для цитирования: Калугина И.Е., Темников А.Г., Гундарева С.В., Черненский Л.Л. Особенности расчета поражения молнией элементов воздушных линий электропередачи // Вестник МЭИ. 2020. № 6. С. 46—52. DOI: 10.24160/1993-6982-2020-6-46-52.
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For citation: Kalugina I.E., Temnikov A.G., Gundareva S.V., Chernensky L.L. Some Features of Calculating the Lightning-Induced Damages to Overhead Power Line Elements. Bulletin of MPEI. 2020;6:46—52. (in Russian). DOI: 10.24160/1993-6982-2020-6-46-52.
