Lightning Interaction with 132 kV Transmission Line Protected by Surge Arresters

In the previous paper (D. Caulker, H. Ahmad, Z. Abdul-Malek, Shielding failure analysis of 132 kV transmission line shielded by surge arresters associated with multiple lightning strokes), the voltage induced onto a 132 kV double-circuit overhead transmission line tower associated with multiple lightning strokes terminating on the tower was found to be considerable in contrast to single lightning strokes relating to backflash and shielding failure. This paper develops the preceding work in three different areas. At first, considers the induced voltages on the tower due to MSL strikes on all three phase conductors on the left-circuit of the tower during shielding failure. Middle phase arms of all three phases produced the most severe voltages. Secondly, line surge arresters are installed on all towers after performing the preceding investigations when no line surge arresters were installed on the towers. This allows the possibility of determining appropriate arrester configurations for reduction of line outages. Lightning surge arresters are shown to be an important consideration in determining the lightning performance of the line in preventing line failures.