Open AccessExperimental Study on Internal and External Noise Characteristics of a 10kV Oil-immersed Transformer
Author(s) -
Ling Lü,
Juan Martino,
Shubing Song,
Yue Ma,
Lianhuan Xu,
Hao Cao
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/677/5/052032
Subject(s) - acoustics , transformer , harmonics , noise measurement , noise (video) , amplitude , electrical engineering , engineering , physics , noise reduction , computer science , optics , voltage , artificial intelligence , image (mathematics)
This paper investigates the internal and external noise characteristics of a 10kV oil-immersed transformer based on advanced acoustic measuring technology. A kind of fibre-optic hydrophone is installed inside the transformer and four acoustic sensors are placed outside in the air. The noise is measured under the condition of no-load and short circle, and the amplitude and frequency characteristics are obtained. The results show that the amplitude of internal noise is higher and contains more high order harmonics when compared with the external noise. It means the internal noise has a higher signal noise ratio, and contains more information. These results can be used for further research such as transformer noise generating mechanism, transmission regulation, transformer noise controlling.