Research on Partial Discharge Detection of Switchgear Based on Ultrasonic Signal Characteristic

Author:

Zhu Xiaofeng,Lu Lizhong,Jiang Yanjin,Liu Yongshuai

Abstract

Abstract With the rapid development of power systems, the switchgear, which is widely used, plays an increasingly important role. Partial discharge is one of the main causes of insulation failure of the switchgear, which is a serious threat to personal and equipment safety. In this paper, the partial discharge of the switchgear is detected based on the ultrasonic method. According to the characteristics of ultrasonic waves generated by partial discharge, a partial discharge detection method for the switchgear based on the characteristics of ultrasonic wave signal is designed. The wavelet threshold denoising algorithm is used to denoise the ultrasonic signal and draw the partial discharge phase distribution map by using the characteristics of low amplitude and wide frequency distribution of the interference signal. Finally, the improved support vector machine algorithm is used to identify and diagnose four types of discharge based on 280 groups of experimental data. By adjusting the kernel function and optimizing the support vector machine algorithm, the final recognition accuracy is more than 90%.

Publisher

IOP Publishing

Subject

Computer Science Applications,History,Education

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2. Research on Comprehensive Identification and Classification Technology for Latent Faults in High- Voltage Switchgear Based on Machine Learning;2023 International Conference on Advances in Electrical Engineering and Computer Applications (AEECA);2023-08-18

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