Partial discharge ultrasonic detection based on EULER-MUSIC algorithm and conformal array sensor

• Published in: IET generation, transmission & distribution Vol. 12; no. 14; pp. 3596 - 3605
• Main Authors: Pang, Xianhai, Wu, Han, Li, Xiaofeng, Qi, Yanxun, Jing, Hao, Zhang, Jiantao, Xie, Qing
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 14.08.2018
• Subjects: array elements; array flow pattern; array signal direction finding algorithm; array signal processing; cylindrical conformal array; cylindrical conformal array sensor; electrical equipment; Euler transform; EULER‐MUSIC algorithm; multiple signal classification; partial discharge measurement; partial discharge ultrasonic detection; PD detection; PD signal testing; Research Article; sensor arrays; signal classification; signal detection; signal‐to‐noise ratios; simulation model; transforms; PD detection; signal detection; array signal direction finding algorithm; array flow pattern; transforms; PD signal testing; signal classification; sensor arrays; cylindrical conformal array sensor; partial discharge measurement; partial discharge ultrasonic detection; multiple signal classification; array elements; Euler transform; simulation model; EULER-MUSIC algorithm; electrical equipment; cylindrical conformal array; signal-to-noise ratios; array signal processing
• ISSN: 1751-8687; 1751-8695
• DOI: 10.1049/iet-gtd.2017.2016

A conformal array sensor suitable for partial discharge (PD) detection of electrical equipment was designed which displays multiple characteristics including compatibility with the surface of any carrier without affecting the performance of the carrier. Taking a cylindrical conformal array as an example, the simulation model was given and the array flow pattern of the cylindrical conformal array sensor was determined. Based on the Euler transform, the algorithm of multiple signal classification (MUSIC) was improved. An algorithm of array signal direction finding suitable for conformal array sensors was proposed and its performance under different signal-to-noise ratios and different array elements was simulated. The improved algorithm and conformal array sensor were used to simulate and test the PD signal. The results show that the algorithm and the conformal array sensor are suitable for PD detection of electrical equipment.