Summary
The ongoing digital transformation of power transformer asset management necessitates advanced methods for monitoring and evaluating key components. This paper introduces an innovative approach developed by a leading OLTC (On-Load Tap Changer) manufacturer, based on systematic Vibroacoustic measurements (VAM) signatures during routine Factory
Read more Read lessAcceptance Tests (FAT). By capturing acoustic signals in tandem with synchronized electrical references such as current switching points, it is possible to generate a detailed digital profile for each tap changer. Every OLTC unit produced undergoes factory-based VAM recording, resulting in the collection of thousands of signature sets each year. The resulting comprehensive dataset enables robust statistical analysis of normal deviations for specific OLTC types and variants thereby establishing the groundwork for digital acceptance criteria and model-specific signature envelopes. Furthermore, the digital signatures created at the factory can be archived within the transformer’s asset database, providing a valuable baseline for ongoing in-service
VAM comparisons throughout the equipment’s operational life.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A2_12405_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Germany |
| Study committees | |
| File size | 898 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
AUERHAMMER Martin - Maschinenfabrik Reinhausen Germany; SAVELIEV Anatoli - Maschinenfabrik Reinhausen Germany; RÄDLINGER Konrad - Maschinenfabrik Reinhausen Germany; FOATA Marc - Maschinenfabrik Reinhausen Germany; WOLFRAM Martin - Maschinenfabrik Reinhausen Germany; CREEVY Stephen - Maschinenfabrik Reinhausen Germany
Keywords
OLTC, Vibroacoustic, VAM, Digitalization, Reference, Signature, Monitoring, Condition, Interpretation, Fingerprint
