Classification of Partial Discharge in Vehicle-Mounted Cable Termination of High-Speed Electric Multiple Unit: A Machine Learning-Based Approach

Abstract

This paper presents a machine learning-based approach to identify and separate partial discharge (PD) and two typical pulse interference (PI) signals in the vehicle-mounted cable terminations of high-speed electric multiple units (EMUs). First, a test platform was established to capture PD and two typical PI signals in these terminations. The acquired signals were then processed using the square envelope method to extract feature parameters, such as the rise time proportion, the left–right symmetry, and the upper–lower symmetry. PD signal classification was carried out on these signals, utilizing waveform parameters derived from a hierarchical clustering algorithm. The results validate that the extracted feature components effectively classify and separate PD and two typical PI signals in the vehicle-mounted cable terminations of high-speed EMUs.

Convolutional Neural Network-Based Pattern Recognition of Partial Discharge in High-Speed Electric-Multiple-Unit Cable Termination

“…In contrast, the high-frequency pulse current detection system boasts advantages such as the ease of installation, a straightforward design, no impact on the operational state of the high-speed EMU cable terminal, broader frequency range coverage of PD signals, heightened test sensitivity, and robust anti-interference capabilities. It enables a quantitative analysis of the discharge magnitude of PD signals [ 19 , 20 ]. Consequently, this paper employs the high-frequency pulse current method as the PD testing approach for the cable terminals of high-speed EMUs.…”

Accurate Identification of Partial Discharge Signals in Cable Terminations of High-Speed Electric Multiple Unit Using Wavelet Transform and Deep Belief Network

“…The vehicle-mounted cable system is a crucial component of the power transmission for high-speed trains, affecting the safety and reliability of high-speed train operation [1][2][3]. At the same time, the termination of vehicle-mounted cables, as weak points of the insulation, are prone to partial discharge, reducing overall insulation performance [4][5][6][7].…”