Detection of Winding Axial Deformation in Power Transformers by UWB Radar Imaging

TL;DR

This paper introduces a UWB radar imaging technique to detect and measure axial displacement in power transformer windings, providing a non-invasive diagnostic tool with verified simulation results.

Contribution

A novel UWB radar imaging method for detecting axial winding displacement in transformers, enabling precise, non-invasive assessment of winding integrity.

Findings

Effective detection of axial displacement demonstrated in simulations

High precision measurement of winding displacement achieved

Method offers a non-invasive diagnostic approach

Abstract

In this paper, a novel method for detecting transformer winding axial displacement has been presented. In this method, which is based on UWB radar imaging, a UWB pulse is transmitted to the transformer winding and the reflection from it is received and recorded. By changing the antenna position this process is repeated on several points along the axis of the winding. The measured signals are mapped to a 2-D image of the winding. By analyzing this image, the axial displacement of the winding can detected and the magnitude of it is determined with an acceptable precision. Simulation results are provided to verify the proposed method.