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《High Voltage Engineering》 2008-08
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Vibration and Sound Waveform Analysis of 500 kV Single Phase Power Transformer

MA Hong-bin1,HE Jin-liang1,CHEN Qing-heng2(1.State Key Lab of Power Systems,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;2.Huizhou Power Supply Bureau,China Southern Power Grid Co.,Ltd.,Huizhou 516000,China)  
In order to understand the characteristic of single phase 500 kV transformer's vibration and sound and the relationship between them,a new on-line monitoring plan of the vibration and sound was designed with the simultaneous use of both qualified vibration and sound sensors.The experiment was operated in Huizhou 500 kV substation and the #3 500 kV single-phase power transformer was selected as our experimental object.The vibration sensors were put onto different typical positions and one sound sensor was set on one side of the transformer with the sampling frequency of 12.8 kHz.The acquirement of the experiment includes not only the steady and clear vibration and sound waveform of the monitoring positions but also the spectra scope from 0 to 6 kHz.The spectrum analysis shows the frequency of the vibration and sound mostly convergences from 100~500 Hz and it nearly disappears at the frequency higher than 1 kHz.In conclusion,with the help of the vibration and sound sensors and the related hardware and software,the function situation of the transformer can be determined by the peak value of the waveform and the distribution of spectra.The results provide a valuable reference to the on-line vibration and sound monitoring system of transformers.
【Fund】: 国家自然科学基金(50425721)~~
【CateGory Index】: TM41
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