ANALYSIS OF LIGHTNING
STRIKE WITH CORONA ON OHTL NEAR THE SUBSTATION BY EMTP
Zahira ANANE1
, AbdElhafid BAYADI1 and Alen Bernadić 2
1 Department
of Electrical engineering Automatic Laboratory (LAS) of Setif 1 Faculty of
technology, UFAS, Setif, Algeria
2Associate
on Faculty of Electrical Engineering Mechanical Engineering and Naval
Architecture University of Split,
ABSTRACT
Lightning protection and insulation
coordination of transmission lines and substations require an accurate
knowledge of the magnitudes and waveforms of lightning overvoltage. To simulate
the lightning overvoltage precisely near the substation, this study has shown
how to consider the lightning impulse corona for distortion effect of this
overvoltage. Attenuation and deformation effects of lightning impulse corona
along transmission lines are evaluated by the simulation results. This paper
describes the substation equipment modeling in the software Electromagnetic
Transients Program–Alternative Transients Program EMTP. Corona effect is
incorporate in order to estimate the attenuation and deformation of
overvoltage’s travelling waves on transmission lines near substations.
Variations of lightning stroke current magnitudes, protection distances, and
the impact points are obvious due to the applied dynamic corona model. Several
elements of substation equipment are modeled in ATP/EMTP using MODELS language.
The Simulation results show that the amplitude and voltage travelling
wave-fronts attenuated remarkably. Deformation of the wave shapes mainly occurs
when the impulse voltage exceeds the corona inception voltage.
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