Comparison of the acoustic performance and positioning accuracy of three kinds of planar partial discharge ultrasonic array sensors. Issue 1 (1st January 2016)

• Record Type: Journal Article
• Authors: Xie, Qing; Li, Tong; Tao, Junhan; Liu, Xuying; Liu, Dan; Xu, Yuqin
• Is Part Of: IET radar, sonar & navigation. Volume 10:Issue 1(2016)
• Page Start: 166
• Page End: 173
• Publication Date: 2016-01-01
• Subjects: ultrasonic arrays -- sensor placement -- partial discharges -- sensor arrays -- direction‐of‐arrival estimation -- power systems; acoustic performance -- positioning accuracy -- planar partial discharge ultrasonic array sensor -- electrical equipment -- power systems -- insulation fault elimination -- circular array sensor -- square array sensor -- sparse signal decomposition -- directions of arrival -- DOA -- PD source; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2015.0097
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : The detection of partial discharge (PD) sources in electrical equipment is very important for safe and stable operation of power systems as it allows for the timely elimination of insulation faults. Cross, circular and square array sensors are commonly used in the detection. In order to determine which form is the best, this study compares the acoustic performance and positioning accuracy of the different arrays. Firstly, this study does research on the quantitative evaluation of the acoustic performance of the planar ultrasonic array sensors. Sparse signal decomposition theory is then applied to find three different directions of arrival (DOAs) of the signal from the PD source to the array sensor. Next, using two of the DOAs (azimuth and pitch), the location of the PD is determined as the centre of a sphere whose surface is tangential to the three DOAs in three different planes. The positioning accuracy of the sensors is then derived. Finally, simulation results show that the acoustic performance of the circular array is the best. It also produces the most accurate location results. Therefore, a circular array is the optimal form to use for the construction of a planar array sensor.