Multiple Partial Discharge Sources Detection in Air Insulation Using Antenna Monopole

Partial Discharge (PD) is an initial phenomenon of a breakdown of isolation equipment. The continuous failure will damage power equipment lead to a breakdown. Early detection of PD is a preventive measure whose effectiveness is continuously sought to detect physical contact and facilitate monitoring. In isolation equipment, PD is generally not only at one location; there are two or more different locations where the PD event occurs. Thus, equipment is needed to detect multisource PD effectively. The use of Ultra High Frequency (UHF) to detect PD is an innovation that continues to be searched for in its authentication development. This study also utilizes UHF to detect several PD events using two types of electrodes, namely needle to plane and bust to plane, as implications of the two PD signals. The antenna will capture the UHF signal, and the results will be compared using conventional methods using High-Frequency Current Transformer (HFCT). The UHF signal is transmitted to the radio signal using Software Defined Radio (SDR) as a signal processor to inform frequency range PD. The testing results showed that HFCT performance in PD detection is slightly better than the antenna in terms of sensitivity and clarity. Despite that, PD frequency is around 50MHz-500MHz in air insulation.