Stricter environmental requirements have also been reflected in the approach to the maintenance of high-voltage equipment. One of these requirements is the permissible noise level of power transformers, particularly where there is significant population density near the plant. The conditions for measuring transformer sound levels in a real-world operating environment differ significantly from those in factory test laboratories. The paper – Transformer Fonometry in Operation, whose authors Predrag Mijajlović, Chief Test Engineer and Technicians Zheljko Ivanović i Bojan MujovićIt considers the technical, operational and organisational factors that influence this issue. The complete analysis is based on examples from a real-world plant.
This paper presents the results of sound level measurements on power transformers in real-world operation. Certain factors and influences affecting the measured values have been selected for various examples of specific sampling. The recorded sound levels are random and non-repeatable in all cases. Based on the physical characteristics of a transformer's operation in real-life conditions, the aim was for the sound level measurement results to be comparable with other preventive tests, and to complement and confirm them. Primarily, the aim was to introduce these measurements as a mandatory component of preventive maintenance for power transformers, the authors concluded.
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