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    Comparative study of two typical one-third octave algorithms in substation noise analysis by Zhenghai Liao, Zheyuan Gan, Jingzhu Hu, Jun Zhao, Bing Zhou, Jiangong Zhang

    Published 2022-11-01
    “…To compare and evaluate the applicability of these two typical algorithms in power grid environmental noise dominated by low-frequency noise, this paper conducts detailed simulation test research from relative attenuation test, performance test, and prototype test at the AC UHV base of China Electric Power Research Institute. It is found that the FFT analysis method has advantages in suppressing spectrum leakage, thereby ensuring the accuracy of spectrum analysis, but the relative attenuation value of the spectrum at low frequency (31.5 Hz) and high frequency (5000 Hz) cannot meet IEC 61260-1-2014 required class 1 requirements, and when analyzing the noise emitted by the UHV base, the analysis results of some bands have a large deviation compared with BK connect software, and the maximum is -6.09 dB. …”
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