DESAIN DAN PABRIKASI UHF ANTENA KUBUS 3-D UNTUK DETEKSI PARTIAL DISCHARGE (PD)

• Main Author: FAUZAN (NIM: 23216050), AKHMAD
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25276
• Institution: Institut Teknologi Bandung

Partial discharge (PD) is one of electrical phenomena which might occur in high <br /> <br /> voltage (HV) equipment and can be used for diagnosing the condition of equipment. <br /> <br /> PD emits electromagnetic wave that can be detected by antenna device. Many types <br /> <br /> of ultra-high frequency (UHF) antenna have been developed to achieve a better <br /> <br /> sensitivity and accuracy in certain bandwidth (300 MHz –3.0 GHz) for detecting <br /> <br /> the UHF component generated by PD. This paper presents a new concept design of <br /> <br /> a small, easy to fabricate, 3-D cube antenna made of copper sheet as main material. <br /> <br /> Three antenna prototypes are proposed which operate at three different dominant <br /> <br /> frequencies, 1.46GHz, 2.26GHz and 2.82GHz. Each antenna prototype was <br /> <br /> designed with a three-dimension finite difference time domain (FDTD) simulation <br /> <br /> software (CTC Co.; MAGNA TDM version 8.3). Measurements of frequency <br /> <br /> dependence of return loss of thus designed antenna prototype were made with a <br /> <br /> vector network analyzer (VNA). PD measurement in electrode system including <br /> <br /> artificial PD source was also conducted to evaluate the performance of the <br /> <br /> developed antennas. In consideration of high frequency PD component, the <br /> <br /> experiment was using artificial PD object; needle-plane electrode 2mm gap and rodplane <br /> <br /> electrode 0.2mm gap with 1m distance from the antenna prototype. <br /> <br /> Electromagnetic wave (EM) intensity and frequency captured by the antenna <br /> <br /> prototype then compared. It was found that the antenna prototype detected average <br /> <br /> PD magnitude value ranged in the order of 1500pC for the object PD source. <br /> <br /> Measurement of antenna prototype directivity is also examined and obtained a good <br /> <br /> agreement with the simulation result.