Characteristic of PD Phase Patterns, PD Pulse Sequence Patterns and PD Frequency Spectrum in Air Insulation Measured by RC Detector

Abstract

Partial discharge is one type of failure that occurs in the isolation of high voltage equipment. Partial discharge can cause damage or breakdown of high voltage equipment. So that needs monitoring to be done to determine the quality of insulation on electrical equipment. One way to find out the quality of insulation can be done by measuring partial discharge in isolation. This study discusses the characteristics of partial discharge in air isolation. Partial discharge characteristics include PD phase pattern (negative PD phase pattern, positive PD phase pattern, negative PD number, positive PD number, negative PD charge and positive PD charge), PD pulse sequence Patterns and PD Frequency Spectrum. The PD detection used is the RC Detector sensor. The PD phase pattern, PD Pulse sequence pattern and PD frequency spectrum of PD pulse are measured by 5 voltage variations that is at 5 kV, 5.5 kV, 6 kV, 6.5 kV and 7 kV. From the results of the study found the number of negative PD in air isolation at a voltage of 5 kV, 5.5 kV, 6 kV, 6.5 kV and 7 kV in 100 cycles respectly 3839, 4144, 6538, 6754 and 7181. From the results of the study found that the number of PD detected is increase when the test voltage is higher.