APPLICATION AND PERFORMANCE TESTING OF MICROSTRIP ANTENNA AS A SENSOR FOR DETECTING PARTIAL DISCHARGE IN HIGH VOLTAGE EQUIPMENT ON SF6 GAS INSULATION

• Main Author: Yudo Sadewo, Bintar
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/87632
• Institution: Institut Teknologi Bandung

Partial Discharge (PD) is a phenomenon of electrical charge release that can occur in high-voltage equipment and has the potential to cause insulation degradation, leading to electrical system failure. Early detection of PD is crucial in the maintenance of electrical equipment to enhance the reliability and efficiency of the power system. In this study, a microstrip antenna is applied and tested as a PD detection sensor on SF6 gas insulation, which is often used in high-voltage equipment due to its superior dielectric properties. This research uses an experimental method by testing the previously designed microstrip antenna and comparing its performance with the RC, HFCT, and Tie-Square sensors. Testing was conducted at four voltage levels (10 kV, 15 kV, 20 kV, and 25 kV) with a needle-plate electrode configuration. The observed parameters include Partial Discharge Inception Voltage (PDIV), PD waveform, PD phase pattern, and PD frequency spectrum. The research results show that microstrip antennas have high sensitivity in detecting PD signals in SF6 gas insulation with performance comparable to or better than conventional sensors. Additionally, the radiation pattern of the microstrip antenna also affects the accuracy of PD detection, where the optimal signal reception angle is found within a certain range. The comparison between the negative and positive PD responses to voltage variations shows that the microstrip antenna is capable of capturing PD characteristics well, making it a viable alternative sensor for monitoring the condition of high-voltage equipment. This research contributes to the development of PD detection methods based on microstrip antennas, which have the potential to be implemented in real-time monitoring systems to enhance the safety and efficiency of power systems.