Study on Sound Field Distribution Rule for Tank Structures of Large Oil-immersed Transformers

• Published in: E3S Web of Conferences Vol. 233; p. 1021
• Main Authors: Yuchao, Ma, Juan, Mo, Jinshan, Yu, Xiang, Li, Zhongyuan, Zheng
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01.01.2021
• Subjects: Acoustic noise; Acoustic propagation; Acoustic simulation; Aging; Electric power distribution; Electrical transmission; Manufacturing industry; Noise pollution; Noise reduction; Oil; Sound; Sound fields; Sound propagation; Sound sources; Sound waves; Substations; Transformers; Vibration; Wave propagation
• ISSN: 2267-1242; 2555-0403; 2267-1242
• DOI: 10.1051/e3sconf/202123301021

Large oil-immersed transformers are an important part of the transmission and distribution network in power systems. Power transformers are the main noise source of substations. Because of the uneven manufacturing process, aging equipment, long-term operation, and close distance from sensitive points, the problem of transformer noise pollution has become increasingly prominent. In this paper, the transmission and analysis model is established for transformer sound waves on the interface between insulating oil and tank body according to the sound wave propagation rule in complicated medium, and the simplified acoustic simulation model is constructed for large oil-immersed transformers by simulating the vibration noise of transformer core with monopole sound source, with which, the sound field distribution rule inside and outside the transformer tank structure is obtained, and finally, the influence factors for noise distribution are given. The results of the study provide control basis for reducing transformer noise.