<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The article describes the non-contact and contact analysis of 1-MVA dry power transformers with epoxy-resin insulation using an acoustic camera and frequency analyzer with automatic sweeping for low-middle frequency areas. Power transformers are most commonly used for construction component (core, windings, taps) analysis. The electrical, non-rotating machine generates electromagnetic and acoustic emissions that can be used to analyze dry transformers during their operation. Non-contact online diagnostic methods have many advantages over offline methods because it is not necessary to shut down the transformer, and also, the condition and behaviour of the machine are analyzed during its normal operation. The article presents the analysis and comparison of structural parts of the distribution dry transformers of the same type and power. The problem of insufficient or incorrect clamp-screw connection was identified using the SFRA (Sweep Frequency Response Analysis) method.</p>
</abstract>

The article describes the non-contact and contact analysis of 1-MVA dry power transformers with epoxy-resin insulation using an acoustic camera and frequency analyzer with automatic sweeping for low-middle frequency areas. Power transformers are most commonly used for construction component (core, windings, taps) analysis. The electrical, non-rotating machine generates electromagnetic and acoustic emissions that can be used to analyze dry transformers during their operation. Non-contact online diagnostic methods have many advantages over offline methods because it is not necessary to shut down the transformer, and also, the condition and behaviour of the machine are analyzed during its normal operation. The article presents the analysis and comparison of structural parts of the distribution dry transformers of the same type and power. The problem of insufficient or incorrect clamp-screw connection was identified using the SFRA (Sweep Frequency Response Analysis) method.

Combination of Non-contact and Contact Measuring Methods for Analyzing Structural Conditions of Dry Transformers

Department of Electrical Devices and High Voltage Technology, Faculty of Electrical Engineering and Computer Science

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The article describes the non-contact and contact analysis of 1-MVA dry power transformers with epoxy-resin insulation using an acoustic camera and frequency...

Combination of Non-contact and Contact Measuring Methods for Analyzing Structural Conditions of Dry Transformers

Published Online: Sep 21, 2023

Page range: 154 - 162

Received: Jan 20, 2023

Accepted: Jun 27, 2023

DOI: https://doi.org/10.2478/msr-2023-0020

Keywords
Diagnostics, dry distribution transformer, acoustic emission, frequency method

© 2023 Miroslav Gutten et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Combination of Non-contact and Contact Measuring Methods for Analyzing Structural Conditions of Dry Transformers

Published Online: Sep 21, 2023

Page range: 154 - 162

Received: Jan 20, 2023

Accepted: Jun 27, 2023

DOI: https://doi.org/10.2478/msr-2023-0020

KeywordsDiagnostics, dry distribution transformer, acoustic emission, frequency method

© 2023 Miroslav Gutten et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Diagnostics, dry distribution transformer, acoustic emission, frequency method