Artificial neural network analysis for classification of defected high voltage ceramic insulators

Abstract

Partial discharge (PD) could lead to the formation of small arcs or sparks within the insulating material, which can cause damage and degradation to the insulator over time. In ceramic insulators, there are several factors that can cause PD including manufacturing defects, aging, and exposure to environmental conditions such as moisture and temperature extremes. As a result, detecting and monitoring PD in ceramic insulators is important for ensuring the reliability and safety of electrical systems that rely on these insulators. In this study, acoustic emission technique is introduced for PD detection and condition monitoring of defective ceramic insulators. A sequence of data processing techniques is performed on the captured signals to extract and select the most significant signatures for classification of defects in insulator strings. Artificial neural network (ANN) has been used to build an intelligent classifier for easily and accurately classification of defective insulators. The overall recognition rate of the classifier was obtained at 96.03% from discrete wavelet transform analysis and 88.65% from fast Fourier transform analysis. This obtained result indicates high accuracy and performance classification. The outcomes of ANN were verified by SVM and KNN algorithms.

Partial Discharge Pattern Recognition Based on an Ensembled Simple Convolutional Neural Network and a Quadratic Support Vector Machine

“…The results from the ANN indicated that the overall recognition rate was dependent on the number of the collected signals, a greater number of captured signals led to a higher recognition rate. The findings of the ANN technique were also verified by SVM and KNN models in [9]. Nevertheless, the major drawback of using traditional machine learning methods for PD pattern recognition is the necessity to extract features in advance.…”

“…The classification accuracy was improved by shifting the phase of the maximum sensor output to 0 • , as proposed. Haiba et al utilized ANNs for classifying defects in ceramic insulators [9]. The results from the ANN indicated that the overall recognition rate was dependent on the number of the collected signals, a greater number of captured signals led to a higher recognition rate.…”