Study on the Sound Radiation Efficiency of a Typical Distribution Transformer

In the realm of power grids environmental protection, low-frequency harmonic noise radiated from transformers has always been the focus of attention for decades. The existing noise control technologies, such as traditional noise barriers, sound insulation enclosures, and damping panels, not only occ...

Full description

Saved in:
Bibliographic Details
Published in:IEEE access 2021, Vol.9, p.125151-125157
Main Authors: Wang, Yuxing, Jin, Huihui, Cai, Xuan, Gong, Peijun, Jiang, Xishan
Format: Article
Language:English
Subjects:
Acoustic insulation
Acoustic noise
acoustic short circuit
Acoustics
boundary element method
Damping
Efficiency
Electric power grids
Enclosures
Environmental protection
Harmonic noise
Impedance
Low frequencies
Metamaterials
Noise barriers
Noise control
Noise reduction
Oil insulation
Phase control
power transformer
Power transformer insulation
Radiation
Radiation efficiency
Radiators
Short circuits
Sound waves
Surface impedance
Transformer cores
Transformers
Vibration effects
Vibrations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In the realm of power grids environmental protection, low-frequency harmonic noise radiated from transformers has always been the focus of attention for decades. The existing noise control technologies, such as traditional noise barriers, sound insulation enclosures, and damping panels, not only occupying a large space but also causing difficulties in heat dissipation and daily maintenance of transformers. Therefore, explorations on the theory and design of low-noise power transformers become particularly necessary. In this paper, we started from the concept of acoustic radiation efficiency and discussed the radiation efficiency of a typical distribution transformer with radiators. It is found that the overall radiation efficiency is reduced below 230 Hz (low-frequency band) due to radiator barriers compared with that of the flat transformer tank. Furthermore, the phase effect of vibration distribution was also studied with a validated BEM code, inspired by the "acoustic short circuit" phenomenon. It is verified that the acoustic short circuit phenomenon truly exists for a typical transformer enclosure and affects its sound radiation. These supporting results might lead to a promising noise reduction technology from the perspective of radiation control of transformer tanks, i.e., acoustic metamaterials for noise source phase control.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3107455