Open AccessPropogation characteristics of PD‐induced UHF signal in 126 kV GIS with three‐phase construction based on time–frequency analysis
Author(s) -
Li Xi,
Wang Xiaohua,
Yang Aijun,
Xie Dingli,
Ding Dan,
Rong Mingzhe
Publication year - 2016
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2016.0158
Subject(s) - ultra high frequency , signal (programming language) , phase (matter) , time–frequency analysis , acoustics , electrical engineering , electronic engineering , telecommunications , computer science , physics , engineering , quantum mechanics , programming language , radar
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.