Analysis and Classification of Different Types of Partial Discharges by Harmonic Orders

Abstract

The genesis of this research work was constituted for the issue of classifying the characteristics of harmonics caused by partial discharge (PD). This work was undertaken based on the hypothesis that the characteristics of the harmonic orders caused by different types of Partial Discharge (PD) can be classified. Experimental work was initially performed and the data obtained from it was validated. This work was then followed by an analysis of the data in order to extract the characteristics of harmonics order and to distinguish information of the harmonics distortion. The findings show that different types of PD produce distinctive harmonics characteristics and distinguishable Total Harmonic Distortion (THD) levels. The outcome of this study show that the hypothesis was precise in stating that different PD types can cause different levels and characteristics of harmonic distortions where in all data obtained were able to be classified. The classification criteria were then tested for accuracy and precision. The results obtained from the classification based on harmonics order characteristics show that 100 % of the PD data tested were identified successfully.

Investigation of Partial Discharges at the High Voltage Electric Motor Bars

“…Manuscript received 24 August, 2015; accepted 14 December, 2015. electric machines could change its properties due to various factors: vibrations, high temperatures, heating and cooling cycles, operating voltage, overvoltage's, pulse and dynamic loading [4], [5]. The outdoor factors (such as: moisture, chemical compounds, various types of radiations, impurities) also can make influence to the deterioration of insulation.…”

“…3. The PDs charge was calculated by using (5). The charge depends proportionally to the voltage at the insulation.…”

A New Reliable Algorithm for Identifying Types of Partial Discharge Detected through Ultrasonic Emission

“…Also, it has been verified that the cable does not produce significant noise to the recorded ultrasonic signal. The following procedures of the experimental works are mostly referred to standards [17][18][19][20] and publication [1-2, 6-8, 15-16].…”

“…Also, it does not pose serious issues of consistencies found in other method. Experimental works have been conducted in accordance to existing standards [17][18][19][20] and the obtained data has been validated to ascertain reliability of the experimental work.…”

High-Resolution FBG-Based Fiber-Optic Sensor with Temperature Compensation for PD Monitoring

“…Many researchers have studied the diaphragm fiber of Fabry–Perot interferometry to detect PD signals [8,9,10,11,12,13]. The material of the diaphragm and the dimensions of the cavity and diaphragm are parameters that must be optimized.…”