Surface Discharge Characteristics on The Acrylic Surface Around The Edge of Circular Plane-Plane Electrodes

Abstract

Almost all the power system trouble due to the damage of the insulation. Therefore, it is necessary to take precautionary measures by detecting the initial damage from the insulation. Damage from the insulation at high voltage is usually characterized by the appearance of partial discharge (PD). One type of the PD is surface partial discharge (surface discharge) that occurs on the surface of the solid insulation because of differences in the permittivity ability of two insulations that stressed by high-pressure electrical field. In this study, a condition will be simulated where surface discharge will easily occurs in acrylic insulation materials with plane-plane electrode as an electric field source tested in air insulation. This condition used as a simulation of the condition of two insulations with different permittivity. Detection of PD that occurs was using a loop antenna sensor as a detector of non-electric PD methods, also using a HFCT (High Frequency Current Transformer) sensor and RC detector as a PD detector of electrical methods. The properties of PD that were tested and analyzed were PDIV (Partial Discharge Inception Voltage), PD waveforms and phase patterns, so that PD properties that occurs can be identified and categorized. In this experiments the PD that occurs on the experimental object can be identified and categorized as a surface discharge.