Open AccessMeasurement of Noise Emission Level at Substation Boundary Based on Coherent Power
Author(s) -
Linyong Li,
Li Li,
Duanjiao Li,
Guofeng Xiao,
Qixiong Lin,
X. Fan,
Zhuanglei Zou,
Lei Peng
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/2/022085
Subject(s) - noise (video) , noise measurement , acoustics , transformer , effective input noise temperature , noise power , boundary (topology) , noise level , noise temperature , noise generator , noise floor , electronic engineering , computer science , electrical engineering , power (physics) , physics , noise figure , engineering , mathematics , noise reduction , phase noise , voltage , artificial intelligence , mathematical analysis , sound pressure , cmos , image (mathematics) , amplifier , quantum mechanics
According to the Chinese standard of GB 12348-2008, to determine the noise emission level at substation boundary, the noise level of substation boundary and the background should be measured separately. Then correct noise level at substation boundary utilizing measured background noise. However, the measured background noise is inaccurate due to the different acoustic environment. Therefore, the noise emission level at substation boundary applying this method often has a certain error. This paper proposes a method for separating transformer noise to calculate the noise emission level of transformers based on coherent power, which avoids the error caused by the inaccurate measurement of background noise.