STUDY OF THE LEAKAGE CURRENT CHARACTERISTICS OF CORRODED 150 KV PORCELAIN INSULATORS: A CASE STUDY OF THE GOMBONG-RAWALO-KESUGIHAN LINE USING COMPUTER SIMULATION

• Main Author: Savira Putri, Adella
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85091
• Institution: Institut Teknologi Bandung

This research investigates the degradation effects of corrosion on porcelain insulators used in high-voltage power systems. Utilizing advanced computational techniques, the study employs ATPDraw software to model and simulate the leakage currents across insulators subjected to various environmental conditions. The simulation integrates the 'Suwarno Model' for the insulator's electrical equivalent circuit and the 'Kizilcay Arc Model' for modeling arcing phenomena. Key parameters such as waveform shape, amplitude, and Total Harmonic Distortion (THD) are validated against experimental data to ensure accuracy. The study adheres to recognized standards, including IEEE 1159-2:2009 for electric power quality monitoring and IEC 60060:2010 for high-voltage test techniques. Limitations of the research include the exclusive use of data from previous experiments on corroded 150 kV insulators, focusing on test voltages under dry-clean fog and salt fog conditions. The findings demonstrate a direct correlation between the severity of insulator corrosion and increased leakage current, with a notable rise in capacitance values as corrosion progresses. The study also highlights the significant influence of intrinsic capacitance and non- linear resistance on the magnitude and waveform of the leakage current, as well as the impact of arcing circuit parameters on current ripples. These insights are crucial for improving the diagnostic techniques and maintenance strategies for high-voltage insulators, ultimately enhancing the reliability and safety of power transmission systems.