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Research on Vibration and Noise of Dry-typetransformer

Author: ZhongXingMing
Tutor: HanQiang
School: South China University of Technology
Course: Solid Mechanics
Keywords: Amorphous alloy transformer Dry-type shunt reactors Vibration Noise
CLC: TM412
Type: Master's thesis
Year: 2010
Downloads: 272
Quote: 2
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Abstract


With the continuous development of the urban construction and the implementation of the power grids , the dry-type transformer with its small size , low loss , safe, reliable, simple maintenance of a wide range of applications . Dry-type transformers are widely used in the place of the business center , office buildings, residential areas , and other people work, live , running noise problem more and more attention. How to control the noise when the run of dry-type transformers , has become a very important issue . Due to the special properties of the structure of amorphous alloy transformer , high noise is an important factor in restricting the promotion . This topic is Experimental study of amorphous alloy transformer machine vibration and noise , obtained the vibration mainly comes from the core of vibration . Amorphous alloy transformer single box core vibration characteristics under different support conditions , looking between the the support border with vibration law , so as to achieve the purpose of the amorphous alloy transformer vibration and noise reduction . The study results showed that the vibration and noise can be reduced by changing the supporting conditions of the iron core . COMSOL Multiphysics is a multi- physics coupling calculation software , draw the appropriate boundary conditions imposed by core simulation of multi- physics coupling can reduce the vibration of the core . The reason why the reactor will produce vibration is determined due to its own structure . The center of the core shunt reactor core special structure , the resulting vibration problem . So far , the vibration is a the core reactors worldwide problem . The topic for the first time in the energized state of dry - core shunt reactor core and coil vibration characteristics, research the different moments vibration noise spectral characteristics , in-depth study of the root cause of the vibration noise . The study found that with decreasing modulus of elasticity of the core gap material , so that the core frequency of the overall configuration of a migration occurred , causing a dense core structure low frequency , the entire one hundred hertz . Using finite element analysis , gap material properties change led to the change of the system structure vibration characteristics . The proposed specific measures to effectively controlled reactor vibration and noise , the noise reduction of about 15dB .

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Power transformers > Dry type power transformers
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