DESIGN AND FABRICATION OF TIE-SQUARE COMBINATION DIPOLE PRINTED ANTENNA AS A PARTIAL DISCHARGE SENSOR IN SF6 GAS INSULATED POWER APPARATUS

• Main Author: Rhamdhani, Taufik
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63731
• Institution: Institut Teknologi Bandung

ABSTRACT DESIGN AND FABRICATION OF TIE-SQUARE COMBINATION DIPOLE PRINTED ANTENNA AS A PARTIAL DISCHARGE SENSOR IN SF6 GAS INSULATED POWER APPARATUS By TAUFIK RHAMDHANI NIM : 23219021 There are various PD detection methods such as using RC, HFCT, ultrasonic, infrared, cameras and one of the popular PD detection methods for detecting partial discharge (PD) in gas isolation switchgear (GIS) is the Ultra-High- Frequency (UHF) method. -method). Various types of PD detectors using UHF antennas have been developed in the bandwidth of 300MHz - 3 GHz to detect ultrahigh electromagnetic waves generated by partial discharges in GIS, partial discharges in GIS can be caused by particles floating in the gas insulation, or components that loose or damaged, such as metal that is too close to the conductor, thereby bridging the electricity between the insulation and the conductor and causing the transfer of electrons so that there is an electromagnetic field. Bowtie antenna is one type of wideband antenna. Bandwidth (broadband) means that an antenna can detect not only on one frequency but on a certain frequency range. such as log periodic antennas, yagi antennas, patch/printed antennas, etc. dipole and Bowtie are categories of patch/printed antennas. This paper discusses the design of a dipole antenna as a UHF sensor. This paper discusses the adjustment between simulation and measurement of Bowtie, dipole and Tie-Square antennas as UHF sensors. An investigation of the effect of wing radius, flare angle, and Bowtie antenna gap distance on bowtie antenna characteristics has been carried out. antenna dipole in terms of length and width, while the Tie-Square is the best combination of the two. The antenna must have a small return loss, a wide bandwidth and a resonant frequency of around 300 MHz - 3 GHz Because it is a characteristic of a good UHF antenna with a return loss below -10 dB capable of iv receiving optimal radiated power, with a wide bandwidth. can detect a wide frequency range, and the resonant frequency corresponds to the frequency band. The simulation results show that the bowtie antenna is able to produce an antenna with optimal sensitivity with a wing radius of 100 mm, a flare angle of 140 degrees, a gap distance of 2 mm. The optimal dipole antenna is 45x40mm and the Tie-Square antenna is a combination of the two sizes. In the measurements on the GIS SF6 all three gave a good response with the characteristics of each antenna. The simulation and measurement results provide a good agreement. Keywords : Partial discharge, Bowtie antenna, sensor, ultra high frequency, ultrawideband, gas insulated substation, return loss, VSWR, antenna impedance,