OPTIMIZATION OF TRANSMISSION LINE ARRESTER INSTALLATION TO REDUCE LIGHTNING OUTAGE RATE ON 150 KV TRANSMISSION LINES GILIMANUK – CELUKAN BAWANG - PEMARON

• Main Author: Fathurrohman
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87115
• Institution: Institut Teknologi Bandung

A 150 kV High Voltage Overhead Line is a part of the electrical power transmission system. This line is highly susceptible to outages due to lightning stroke, which can cause voltage surges that may damage electrical equipment. Lightning is the most dominant cause of transmission outages in Indonesia. In the Bali Transmission Operating Unit area, 86% of transmission outages over the last 5 years have been caused by lightning. The 150 kV Gilimanuk – Celukan Bawang – Pemaron line, with a total length of 75.075 km and 240 towers, is a transmission line that frequently experiences outages due to lightning, as identified by Vaisala software. The analysis revealed that the outages were caused by backflashovers. Several corrective measures have been taken, including improving the grounding of transmission towers, connecting ground wires, and replacing insulators that experienced flashovers. Installing Transmission Line Arresters (TLA) is essential to reduce lightning-induced outages. Determining the optimal location for TLA installation on transmission lines to achieve minimal outage levels is not a simple task. In this study, the optimal and effective placement of TLA was determined using simulation tools such as ATPDraw (Alternative Transients Program). Further optimization is required to protect towers that are not directly shielded and to handle extremely high lightning strike currents.