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A convolutional neural network based deep learning methodology for recognition of partial discharge patterns from high voltage cables

Peng, Xiaosheng, Yang, Fang, Wang, Ganjun, Wu, Yijang, Li, Lee, Li, Zhaohui, Bhatti, Ashfaque Ahmed, Zhou, Chengke, Hepburn, Donald M, Reid, Alistair J, Judd, Martin D and Siew, W H 2019. A convolutional neural network based deep learning methodology for recognition of partial discharge patterns from high voltage cables. IEEE Transactions on Power Delivery 10.1109/TPWRD.2019.2906086

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Abstract

It is a great challenge to differentiate Partial Discharge (PD) induced by different types of insulation defects in high voltage cables. Some types of PD signals have very similar characteristics and are specifically difficult to be differentiate, even for the most experienced specialists. To overcome the challenge, a Convolutional Neural Network (CNN) based deep learning methodology for PD pattern recognition is presented in this paper. Firstly, PD testing for five types of artificial defects of Ethylene-Propylene-Rubber (EPR) cables is carried out in the High Voltage (HV) laboratory to generate signals containing PD data. Secondly, 3500 sets of PD transient pulses are extracted and then 33 kinds of PD features are established. The third stage applies a CNN to the data: typical CNN architecture and the key factors which affect the CNN based pattern recognition accuracy, are described. Factors discussed include the number of the network layers, convolutional kernel size, activation function, and pooling method. The paper presents the flowchart of the CNN based PD pattern recognition method and the evaluation with 3500 sets of PD samples. Finally, the CNN based pattern recognition results are shown and the proposed method is compared with two more traditional analysis methods, i.e. Support Vector Machine (SVM) and Back Propagation Neural Network (BPNN). The results show that the proposed CNN method has higher pattern recognition accuracy than SVM and BPNN, and that the novel method is especially effective for PD type recognition in cases of signals of high similarity, which is applicable for industrial applications.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0885-8977
Date of First Compliant Deposit: 20 March 2019
Date of Acceptance: 12 March 2019
Last Modified: 12 Apr 2019 12:50
URI: http://orca.cf.ac.uk/id/eprint/120923

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