Magnetostriction impact noise and vibration on power trans-former characteristic via PSO method.

Electromagnetic design of the power transformer to reduce the noise based on the magnetostriction variation, it should be faced it very closely due to the resident people paid a great attention recently. Actually, it is well-known that magnetostriction of the power transformer is caused by the exciting variation of the magnetic core. This study, it presented an optimization method to reduce the noise of the power transformer that also performed the factory testing before delivery and after that to install on-sited downtown power station, is a main objective. A novel method particle swarm optimization (PSO) is use to reduce noise level of transformer and also effective to decrease total cost reduction. This paper discusses a main magnetic property of magnetostriction dependent on the transformer operated at full-load tests. Also, this study is presented that a lot of transformers with capacities, 15 MVA to 60 MVA / high voltage (HV) 132kV to low voltage (LV) 33 kV around six units. Actually, a full loading testing for transformer characteristic is to lead a key point for reduction of the noise and vibration. A tricky noise source of the power transformers for no-load (core/ magnetostriction) and full-load (winding/displacement $\varepsilon )$ testing results compared with simulation and measurement data, are performed. The difference between the simulated and the measured sound levels is limited around 3dB range especially for higher capacity and successfully developed in this case.