INVESTIGATION OF THE LIGHTNING ARRESTER OPERATION IN ELECTRIC POWER DISTRIBUTION NETWORK
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Date
2018-04
Authors
Oluseyi, P.O.
Akinbulire, T.O.
Amahian, O.
Journal Title
Journal ISSN
Volume Title
Publisher
Faculty of Engineering, University of Nigeria, Nsukka
Abstract
Lightning phenomenon has resulted into several losses to both supply-side and load-side of the electricity
infrastructure. Quite a handful of research has investigated strategies for its mitigation. This work is an application of
the Fernandez-Diaz arrester model to the section of Eko Distribution network. The procedure involves simulation of
the network in respect of the influence of the surges and surge arresters using MATLAB/SIMULINK. The study reveals
that whenever lightning strikes, the resulting overvoltage causes distortion to the voltage waveform, as well as the
current waveform. This indicates the presence of harmonics. Meanwhile, with the installation of the arresters, the
overvoltage reduces by 86% at the nearest node of installation. However, at the other nodes within the same branch,
the installed arrester attenuated the surge overvoltage by approximately 60%. This suggests that more arresters need
to be installed at other nodes along the branch in order to eliminate the occurrence of overvoltage. Moreover, the
study reveals that a surge arrester installed at one of the two branches of the network has negligible effect in
attenuating voltage surge at the other branch of the same network.
Description
Keywords
lightning arrester, substation, overvoltage, attenuation, harmonics