STUDY ON LEAKAGE CURRENT CHARACTERISTICS AND ELECTRICAL EQUIVALENT CIRCUIT SIMULATION OF INSULATORS UNDER SALT FOG CONDITION

• Main Author: Fathur Majid, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/55208
• Institution: Institut Teknologi Bandung

Leakage Current (LC) identification is commonly used to diagnose the insulator’s health, whether it is in good or bad condition. This research reports the result of LC identification of insulator under salt fog condition. An electrical equivalent circuit of insulator was proposed to simulate the LC waveform. The simulation was done using ATPDraw software. The simulation result would be validated for its magnitude, waveform, Total Harmonic Distortion (THD), and dominant harmonic number. Simulations were conducted on four clusters of insulators, which are uncoated ceramic insulator, coated ceramic insulator, epoxy resin insulator and silicone rubber polymer insulator. The results show that the insulator characteristics could be identified by analysing the pattern of the obtained electrical parameters from each condition. The salt fog conductivity, pollutants, and relative humidity have a significant effect along with the applied voltage level in reducing the quality of the insulator. Polymer insulators have the finest surface resistance quality compared with the other clusters. Intrinsic capacitance tends to decrease as the applied voltage increased, while surface capacitance varies according to the arc position. The phenomenon prior to flashover of an insulator could be indicated by complex non-linear characteristics and severe arcing.