Propogation characteristics of PD‐induced UHF signal in 126 kV GIS with three‐phase construction based on time–frequency analysis. Issue 7 (1st October 2016)

• Record Type: Journal Article
• Authors: Li, Xi; Wang, Xiaohua; Yang, Aijun; Xie, Dingli; Ding, Dan; Rong, Mingzhe
• Is Part Of: IET science, measurement & technology. Volume 10:Issue 7(2016)
• Page Start: 805
• Page End: 812
• Publication Date: 2016-10-01
• Subjects: gas insulated switchgear -- gas insulated substations -- partial discharge measurement -- time‐frequency analysis -- power system security; propagation characteristics -- PD‐induced UHF signal -- three‐phase construction -- partial discharge detection -- PD detection -- gas‐insulated switchgear -- substation security -- ultrahigh‐frequency signal -- three‐phase GIS -- time‐frequency analysis method -- insulation defect -- point position detection -- voltage 126 kV; Measurement -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Periodicals; Nanotechnology -- Periodicals; Electromagnetism -- Periodicals; Medical instruments and apparatus -- Periodicals; 621.3
• DOI: 10.1049/iet-smt.2016.0158
• Languages: English
• ISSNs: 1751-8822

Abstract

Abstract : Partial discharge (PD) detection of the gas‐insulated switchgear (GIS) is an effective method for substation security. The GIS with three‐phase construction is widely used for substations. The propagation characteristics of PD‐induced ultra‐high‐frequency (UHF) signal in three‐phase GIS is investigated in this study by time–frequency analysis method. The variation of peak‐to‐peak value ( V pp ) and cumulative energy, and especially the energy density in the time–frequency plane are used to represent the feature of the UHF signal. Furthermore, the different situation of the insulation defects and the detection point positions are compared, and the reason for the difference is explained as well. As a result, this study identified a novel method to determine the PD source position in the GIS with three‐phase construction.