Determination of transformer HV winding axial displacement occurrence, direction, and extent using time-domain analysis of UWB signals

作者：Rahbarimagham Hesam; Esmaeili Saeid; Gharehpetian Gevork B

来源：IET Science Measurement & Technology, 2018, 12(4): 514-520.

DOI：10.1049/iet-smt.2017.0124

• transformer windings
• ultra wideband antennas
• receiving antennas
• transmitting antennas
• transformer HV winding
• transformer high-voltage winding
• axial displacement occurrence
• time-domain analysis
• UWB signals
• electromagnetic waves
• receiving antennas
• transmitting antenna
• ultra-wideband signals
• magnitude Euclidean distance index

In this study, a new method is proposed to monitor axial displacement (AD) of transformer high-voltage (HV) winding using electromagnetic waves. The proposed method employed two receiving antennas and one transmitting antenna to exchange ultra-wideband (UWB) signals with the winding. The magnitude Euclidean distance (MED) index is used to compare the received signals when winding is sound or defective. Two receiving antennas receive signals at two different positions upon ADs in winding which causes different values in the amplitude of the received signals as well as the MED index of two receiving antennas. Hence, taking advantage of this feature, the occurrence, direction, and extent of AD can be identified. The proposed method is assessed using a simulation model. Then, experiments are conducted on an actual transformer winding using an experimental setup.

• 出版日期2018-7