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

  • Author(s): Xianhai Pang 1, 2 ; Han Wu 3 ; Xiaofeng Li 1, 2 ; Yanxun Qi 3 ; Hao Jing 1, 2 ; Jiantao Zhang 3 ; Qing Xie 3
    • View affiliations
  • Source: Volume 12, Issue 14, 14 August 2018, p. 3596 – 3605
    DOI:  10.1049/iet-gtd.2017.2016 , Print ISSN 1751-8687, Online ISSN 1751-8695
© The Institution of Engineering and Technology
Received 21/12/2017, Accepted 06/05/2018, Revised 24/04/2018, Published 18/05/2018

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.

Inspec keywords: sensor arrays; array signal processing; signal classification; transforms; signal detection; partial discharge measurement

Other keywords: Euler transform; multiple signal classification; cylindrical conformal array; signal-to-noise ratios; PD detection; simulation model; electrical equipment; partial discharge ultrasonic detection; array flow pattern; array elements; array signal direction finding algorithm; PD signal testing; cylindrical conformal array sensor; EULER-MUSIC algorithm

Subjects: Charge measurement; Integral transforms; Signal detection; Dielectric breakdown and discharges

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