| Title |
A Study on the Tank Noise Reduction Techniques of Power Transformers |
| Authors |
권동진(Kweon, Dong-Jin) ; 구교선(Koo, Kyo-Sun) ; 김정찬(Kim, Jung-Chan) ; 김유현(Kim, Yoo-Hyun) |
| Keywords |
Transformer ; Noise ; Vibration ; Tank ; Reduction |
| Abstract |
According to the increase of power demand and expansion of downtown, it is necessary to install transformers additionally in operating substations and construct substations in residential area. But the public complaint has been increased due to the transformer noise of the substation. KEPCO has used a vibration preventing pad, various soundproof walls and an encloser to transformers in outdoor substations, and a soundproof door, shutter and wind-path soundproof equipment in indoor substations to block the sound propagation from the transformers. But these noise reduction methods are not satisfied. It should be considered to reduce transformer noise itself. In this paper, we investigated tank noise reduction techniques to develope a low noise transformer. According to the mode analysis of transformer tank, we found out characteristics and locations of noise on the tank, and it's nature vibration was also analysed. On the basis of these analysis, reinforcement equipment was installed around transformer tank, and ellipse shape tank was changed to round shape tank. The effect of noise reduction was evaluated using noise generation source. |