Site Measurement & Analysis for Improving Lightning Performance of 500 kV Transmission Line
Lightning is the major source of power outages in Malaysia, contributing to 70% of system trippings. Soil characteristics and earthing arrangement play a key role in achieving low tower footing resistance, which is directly proportional to backflashover occurrence and transmission line performance. This presentation reviews the outcomes of new earthing arrangements aimed at enhancing tower footing resistance and impedance. These improvements are now being investigated and studied in 500 kV networks.