Prediction and Reduction of Transformer Sound at Design Stage
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Transformer is the most vital equipment in transmission and distribution network, encompassing the entire network from generating station to user¿s premises. Till two decades ago, the sound produced by transformer was not attached any importance in public life. However, of late it is attracting attention as a result of the general public¿s growing concern about the environmental noise pollution. This is more so because, with the growing power demand, more number of power transformer are being installed in the close proximity of the populated rural, urban and suburban areas. During normal ope...
Transformer is the most vital equipment in transmission and distribution network, encompassing the entire network from generating station to user¿s premises. Till two decades ago, the sound produced by transformer was not attached any importance in public life. However, of late it is attracting attention as a result of the general public¿s growing concern about the environmental noise pollution. This is more so because, with the growing power demand, more number of power transformer are being installed in the close proximity of the populated rural, urban and suburban areas. During normal operation, it produces characteristic hum, the magnitude of which increases with increase in its capacity. The origin of the noise is the core vibration because of magnetostriction, which is a mechanical effect in core by the alternating flux. This book presents the prediction of sound level calculation methods to estimate the accurate sound level at design stage and the outcomes of analytical study of sound level control technique, reduction of flux density by increasing yoke cross-sectional area of core through optimization using Memetic Algorithm and compared with Ansoft Maxwell 2D result.
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